| Observation Date |
Observation Time |
Precipitation |
Snowfall |
Snowfall SWE |
Snow Depth |
Snow SWE |
Notes |
| 10/2/2019 |
8:00 AM |
0.56 |
0.0 |
M |
0.0 |
M |
Record warmth on October 1. Max of 86 at station, but 88 at ROC airport, 90 in Dansville. Two separate rainfall events, first one shown in data. Second one arrived at 5am and ended at 06:30, associated with passage of a significant cold front. At obs, drizzle and 66. |
| 10/3/2019 |
9:00 AM |
0.21 |
0.0 |
M |
0.0 |
M |
Temp range: 68/49. Low clouds and drizzle at obs time and 49 with light easterly wind. |
| 10/4/2019 |
8:00 AM |
0.24 |
0.0 |
M |
0.0 |
M |
Temp range 56/46. Low clouds with periods of light rain and drizzle. Max temp occurred during at 22:30, then started to drop following passage of frontal wave and return of very chilly air. At obs time, stratus deck..low overcast and 46. Second round of rain between 03:35 and 04:30. |
| 10/7/2019 |
8:00 AM |
0.51 |
0.0 |
M |
0.0 |
M |
|
| 10/13/2019 |
8:30 AM |
0.11 |
0.0 |
M |
0.0 |
M |
Temp range 56/36. |
| 10/16/2019 |
8:45 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Sunny day with increasing high clouds late in the day. Highs near 60. Overnight, lowering and thickening mid level cloud deck. At obs time, getting dark to the west of station. Radar showing a sharp line of moderate/heavy rain from the Buffalo-Batavia region. Still dry at obs time. |
| 10/17/2019 |
6:05 AM |
0.55 |
0.0 |
M |
0.0 |
M |
|
| 10/18/2019 |
7:00 AM |
0.46 |
0.0 |
M |
0.0 |
M |
|
| 10/22/2019 |
9:00 AM |
0.01 |
0.0 |
M |
0.0 |
M |
|
| 10/23/2019 |
8:00 AM |
0.39 |
0.0 |
M |
0.0 |
M |
Temp range max: 61, overnight min: 44. |
| 10/26/2019 |
8:00 AM |
0.02 |
0.0 |
M |
0.0 |
M |
|
| 10/27/2019 |
8:00 AM |
0.50 |
0.0 |
M |
0.0 |
M |
|
| 10/28/2019 |
8:00 AM |
0.14 |
0.0 |
M |
0.0 |
M |
Overcast with breaks in overcast by days' end. Windy at times especially in afternoon, but went to calm Sunday night with clearing skies. At Monday morning obs, CAVU (sunny), no clouds and temp in mid 40s. Leaf dumping continues, with many small branches and leaces carpeting secondary roadways, driveways, parks and lawns. |
| 10/31/2019 |
8:00 AM |
0.21 |
0.0 |
M |
0.0 |
M |
Temp range 61/55. Overcast most of day, but sun dimly visible towards the southern one half of the sky. Towards the north in the early to mid afternoon, ominous dark mid level clouds...which corresponded to developing rain towards southern Ontario and northern part of Lake Ontario. Very mild, limited diurnal temperature range. Rain shield arrived at 20:14 E.S.T., or 21:14 D.S.T. At obs time, just overcast, near calm and 57. |
| 11/1/2019 |
6:00 AM |
1.26 |
0.0 |
M |
0.0 |
M |
Temp range 64/38. Howling, gale force winds arrived at 20:29 (19:29..75th Meridian Time) with passage of primary cold front. Prior to that, a soaking rain that got underway mid to late morning and into a good chunk of the afternoon. True warm sector arrived in afternoon, with a break in rain and higher clouds visible after 16:00 to about 17:00. At early obs time, partly clear, stars visible, strong W-WNW winds. Temp at 38. |
| 11/3/2019 |
8:00 AM |
0.03 |
0.0 |
M |
0.0 |
M |
|
| 11/5/2019 |
5:00 AM |
T |
0.0 |
M |
0.0 |
M |
Early Obs time. Light rain/drizzle started falling just before 5am. |
| 11/6/2019 |
8:00 AM |
0.07 |
0.0 |
M |
0.0 |
M |
Gloomy with periods of rain showers. After 15:15, precip shut down, partial clearing moved in. Chilly day.
Temp range 50/33. At morning obs time, CAVU...brilliant blue sky, full sunshine, brisk and 37. |
| 11/8/2019 |
8:00 AM |
0.12 |
1.5 |
M |
1.0 |
M |
|
| 11/10/2019 |
8:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
|
| 11/11/2019 |
6:00 AM |
0.11 |
T |
M |
0.0 |
M |
Temp range 45/34. Overcast and gloomy day, but the warmest day in nearly a week. Light drizzle/mist started around or just after 4pm Sunday, turned into light rain after sundown. Overnight, a changeover to very light, wet snow. At obs time, very light snow, 34. Radar returns very weak all across western NY. Area under a heavy snow warning...(winter storm warning; NWS) |
| 11/12/2019 |
10:00 AM |
0.82 |
5.5 |
M |
4.5 |
M |
Measurement period from 6am previous day through 10am 11/12. Snowfall amounts were lower due to a break in preciptation Monday night. Prior to that break, there was a nearly hour period of sleet and freezing rain. Synoptic snows returned after 9pm Monday night, and shut down mid to late morning on the 12th. |
| 11/13/2019 |
9:00 AM |
0.17 |
1.8 |
M |
5.5 |
M |
Temp range 25/14. Mostly sunny and unusually cold in the afternoon. Overnight, lake effect snow bands set up under NW flow. At late obs time, lake bands are weakening, with more morning sunshine returning. |
| 11/14/2019 |
6:00 AM |
0.01 |
0.2 |
M |
4.0 |
M |
Temp range 28/21. |
| 11/22/2019 |
8:00 AM |
0.04 |
0.0 |
M |
0.0 |
M |
Temp range 51/42. |
| 11/28/2019 |
8:00 AM |
0.36 |
0.0 |
M |
0.0 |
M |
Temp range 59/35. |
| 12/2/2019 |
8:00 AM |
1.15 |
6.3 |
M |
6.5 |
M |
Event started as sleet and over the next 6-8 hours, a base layer of 1.3" of sleet covered ground. Eventually it converted for freezing rain and then to rain to drizzle. First part of storm over. Act II with new activity started as snow shortly after 19:00 LST Sunday night. At obs time, snow had gone to very light. An additional 5" of pure snow fell. Total represents the accumulation of both snow and ice pellets (sleet). Temps remained in upper 20s during the night. Temp range of 33/28. At obs time, light snow and 30. |
| 12/3/2019 |
8:00 AM |
0.03 |
0.3 |
M |
5.5 |
M |
Temp range 33/15. Overcast with occasional periods of light snowshowers. By afternoon, majority of it over, except for a final "parting shot" around 17:00 hour. Overnight, skies rapidly cleared after midnight, and temps then plummeted. Ideal radiational cooling took place. At obs time,sunny and 16. Snowfall totals yesterday are accurate...less than half inch of new snow. |
| 12/6/2019 |
8:30 AM |
0.14 |
2.0 |
M |
5.0 |
M |
Temp range: 33/28. Mainly overcast with morning and early afternoon snowsqualls. Some sun did appear mid afternoon,and skies partially cleared overnight. By dawn, next "system," is closing in, and a round of steady light snow broke out after 07:30 Friday. A half inch of newer snow has fallen till the cutoff 08:30am obs, plus the 1.5" of snow that fell Thursday from 08:30 on, in the 24 hour period ending today. |
| 12/7/2019 |
8:00 AM |
0.19 |
2.0 |
M |
5.0 |
M |
Temp range 34/26. |
| 12/10/2019 |
5:30 AM |
0.07 |
0.0 |
M |
1.0 |
M |
Temp range 48/38. Temps steadily climbed all day Monday through obs time today. Overcast skies with showers in the morning and a bit later in day. But most of the day and into the night was rain free. Of significant note is that this is a significant thaw. Most of the snow pack as of obs time, now down to 1" and many area lawns are bare, for southward facing lawns. At obs, temp at 46 and overcast. Strong cold front about to arrive by sunrise. At obs time, overcast, light southerly breeze, melting snow and 47. |
| 12/11/2019 |
8:00 AM |
0.03 |
1.2 |
M |
1.0 |
M |
Temp range 49/24. |
| 12/12/2019 |
6:00 AM |
0.01 |
0.5 |
M |
1.0 |
M |
Temp range 32/13. Full moon visible under mainly clear skies overnight. Min temp started rising to 14 with high cirroform deck moving in at 06:30. Daytime Wednesday featured abundant sunshine, until the Arctic front picked up a lake effect snowband and bodily moved over area mid to late afternoon. Accumulation as noted. |
| 12/13/2019 |
6:30 AM |
0.00 |
0.0 |
M |
1.0 |
M |
Temp range 30/28. Some morning sun but with periods of high and low clouds at times. Overnight, mostly clear, but temps holding nearly steady from yesterday's max's to the morning low on this Friday. At obs time, mainly clear, setting moon to the NW and 30. |
| 12/14/2019 |
8:00 AM |
0.22 |
0.0 |
M |
T |
M |
Temp range 45/35. |
| 12/15/2019 |
8:00 AM |
0.74 |
0.8 |
M |
0.5 |
M |
Temp range 40/32. A soaking rain event during Saturday morning and afternoon. After 14:45, a rapid changeover to wet snow, accumulating to just under an inch before going back to drizzle. Temps in low to mid 30s during the overnight period. At obs time, partly sunny and 32, and increasing west to northwest wind. |
| 12/17/2019 |
2:00 PM |
0.21 |
2.4 |
M |
2.0 |
M |
Late report. Snowfall amount and depth is current up through and including 14:00 Standard Time, Eastern. Snowfall has stopped for now. Obs time temp at 32, which is the maximum for this day, so far. |
| 12/18/2019 |
9:00 AM |
0.07 |
1.6 |
M |
4.0 |
M |
|
| 12/19/2019 |
6:30 AM |
0.10 |
2.5 |
M |
6.0 |
M |
Strong cold air advection with NW flow produced several bursts of snowsqualls and snow flurries during the period. The initial burst started at 12:10pm Wednesday. It lasted about 2 hours, dumping 1.8 inches of snow. Skies brightened. Then, after 15:30, a second squall came in with lesser amounts. More occurred at dusk and at night, too numerous to count. All the while, temperatures continued to drop..from the upper 20s late morning, to 14 by 18:00, with a minimum of 10 at early obs time today. At that time, mostly clear, but lake clouds visible to the N and NE. Snow aloft also observed in that direction. Wind near calm at dawn. Event total over last 2 days now just past 6" of new snow. See yesterday and previous day for other totals. |
| 12/20/2019 |
6:30 AM |
T |
0.3 |
M |
4.5 |
M |
Temp range 19/14. Tea kettle snow in progress at early obs time. Started shortly after 22:30 Thursday night. Thursday daytime featured intervals of low-mid clouds snow free, but frigid, with daytime max of 19. Temps held in upper teens overnight,but a min of 14 observed at obs time. |
| 12/21/2019 |
8:00 AM |
T |
0.1 |
M |
3.5 |
M |
Temp range 26/10. Morning Sc clouds and flurries early. BINOVC by late morning, and by afternoon, lower level Sc clouds evaporated away. Leaving us azure blue skies, and jet contrails visible for the afternoon. Sub-freezing for third day in a row, highs mid 20s. Ovenight, clear skies followed by increasing high clouds. Overnight low of 10, but low lying areas had lows in single numbers. |
| 12/22/2019 |
8:00 AM |
0.00 |
0.0 |
M |
3.0 |
M |
Temp range 35/19. Morning Sc clouds Saturday morning gave way to clearing skies in the afternoon. Temps rose above freezing for the first time since early in the week. |
| 12/23/2019 |
8:00 AM |
0.00 |
0.0 |
M |
2.0 |
M |
Temp range 47/32. Tons of sunshine Sunday, making it our second day in a row of wall to wall sunshine. Pacific air dominating. At morning obs, sunshine continues. |
| 12/24/2019 |
8:00 AM |
0.00 |
0.0 |
M |
1.0 |
M |
Temp range 55/28. A huge warmup accompanied by plenty of sunshine with gentle SW-S breezes. Temps topped out into the mid 50s in many areas, warmest since late November.
During the evening, low clouds formed in vicinity of a sidedoor cold front, shifting our winds to the N and then NE. At dawn, low clouds and 28. |
| 12/25/2019 |
8:00 AM |
0.00 |
0.0 |
M |
0.5 |
M |
Temp range 37/25. Plenty of low clouds in the morning, giving way to midday and afternoon sun. Contrails visible at upper levels, mixing out to cirrus. Overnight, mainly clear skies as temps dropped back to mid 20s. On Christmas morning, tranquil and temps starting to rise. |
| 12/26/2019 |
8:00 AM |
T |
0.0 |
M |
T |
M |
Temp range 45/30. A green Christmas day from 8am to 8am. Mostly cloudy. Late in day, a wind shift to the NE and upslope...along with plenty of moist air...resulted in dense fog after 23:00. It lifted before 07:00, but visibilities restricted to 3-5 miles. At obs, overcast. Ground bare except in northward exposure properties in shadows of homes. But overall, trace on the ground. |
| 12/30/2019 |
8:00 AM |
0.90 |
0.0 |
M |
0.0 |
M |
Temp range 41/38. |
| 12/31/2019 |
8:00 AM |
0.47 |
0.0 |
M |
0.0 |
M |
Temp range 47/35. Periods of rain most of day. Brief incursion of the warm sector allowed temps to rise to upper 40s. Wind shift and cold fropa occurred early to mid afternoon. Temps steadily dropping as we went into nightfall. |
| 1/1/2020 |
8:00 AM |
0.07 |
0.9 |
M |
0.5 |
M |
|
| 1/4/2020 |
7:40 AM |
0.12 |
0.3 |
M |
T |
M |
Temp range 48/35. Deep overcast and gloomy Friday. Indoor lighting needed from early afternoon on. No precip, but temps once again rose to upper 40s. Cooler air arrived before dawn. Light rain that had been falling began to mix with and change to snow by 07:30. Measurement made at 07:40. Temp at minimum, 35, with snow starting to create an icy layer on driveway and sidewalks. |
| 1/5/2020 |
8:00 AM |
0.27 |
1.7 |
M |
1.0 |
M |
Temp range 35/30. |
| 1/6/2020 |
8:00 AM |
0.13 |
1.5 |
M |
1.0 |
M |
Temp range 34/30. |
| 1/8/2020 |
8:00 AM |
M |
1.7 |
M |
1.5 |
M |
Rain gauge not available for snow/water meltdown. My bad. |
| 1/9/2020 |
6:00 AM |
M |
2.5 |
M |
4.0 |
M |
Temp range 34/12. Two bursts of snow since 8am yesterday, depositing additional amounts of new, powdery snow. Strong cold air advection midday into the evening dropped values from near 30 at 11:30 to 22 by 18:00. Overnight, lake clouds remained, along with occasional periods of light snowshowers. Skies cleared after 06:30 & radiational cooling set in. By 08:05, temps went from 18 to 12 in 90 minutes. Rain gauge was not out, due to observer error. Amended snowfall total after second evaluation late morning. |
| 1/11/2020 |
7:50 AM |
0.17 |
0.0 |
M |
0.0 |
M |
Temp range: 48 max (Friday). Temps rise overnight, especially after 5am with warm frontal passage. Now in the warm sector as of transmission time at 07:50. Temperature at 52, overcast with breaks in overcast, gentle southerly breezes. Snowpack gone. |
| 1/12/2020 |
8:30 AM |
0.26 |
0.0 |
M |
0.0 |
M |
Temp range 64/38. A wild 24 hour period. Region broke into the warm sector Saturday morning. Developing cyclone to our west, helped to push a warm front north of the US-Canadian border. Eventually, the mix of clouds and sun went away with rain showers arriving early to mid afternoon. Temps dropped from record breaking mid 60s, to lower 50s by sundown. Shortly after 19:15, the polar cold front limped through, gradually pressing from north to south. An extreme temperature contrast was noted by 19:30 to 23:00. Along the Lake Ontario shoreline, temps were near 38, while in the northern Finger Lakes, temps held in the lower 60s. After midnight, this strong boundary pressed south of area. At 06:00, gale force winds arrived with rapid pressure rises. Gusts to 45 knots noted, but no rain observed. Skies were mostly cloudy with blue breaks observed, and winds starting to die down as of press time. At obs time, temp at 38 with wind still gusting to gale force. High wind warning remains in effect till noon. Overall, little rainfall fell during this period, any snowpiles now gone. But an extraordinary day with record warmth for a memorable Saturday 1/11. |
| 1/14/2020 |
8:45 AM |
T |
0.0 |
M |
0.0 |
M |
Temp range 40/34. Overcast skies, along with a brief morning sprinkle. Areas NW of ROC, near Greece had a period of light rain in the early afternoon. Skies remained overcast into the night. At morning obs time, skies have become mostly clear with sunshine back in style by later 9am obs. Temp at 35. |
| 1/16/2020 |
7:15 AM |
0.06 |
T |
M |
T |
M |
Temp range 41/33. Overcast morning to mid afternoon, then, a bit of clearing. Strato Cu deck retreated by 15:30, allowing the sun to shine. First 5pm sunset since Sat Nov. 2nd (5pm Standard Time). Clouds raced in after sundown. Temps remained above freezing all night, with rain breaking out after 2am. Att obs time, light rain has changed to wet snow, temp at 33. |
| 1/17/2020 |
9:00 AM |
0.16 |
1.7 |
M |
1.5 |
M |
Temp range 33/13. |
| 1/18/2020 |
8:00 AM |
0.01 |
0.5 |
M |
1.5 |
M |
Temp range 18/10. Morning flurries and light squalls shut down by early Friday afternoon. Rapid clearing, but high clouds were already invading our skies by then. With the center of cA high pressure passing overhead, temps plummeted to 9.6 degrees by 22:00, then began to slowly rise with thickening high clouds. At obs time, temp up to 16 with a solid mid level deck over station. Advancing snow shield from Ontario and SW NY approaching, but no flakes seen locally yet. Temps will steadily rise during the next snow to sleet to rain event. |
| 1/19/2020 |
8:00 AM |
0.47 |
3.7 |
M |
4.5 |
M |
Temp range 36/30. Yesterday's max, Overnight Low indicated. Snow broke out mid to late morning and continued into remainder of afternoon and evening. Flake size small but packed, lowering visibilities to under 3/4 mile most of the time. Local town and county roads became clogged with snow. Cars, and vans without snow tires got stuck on local hilly roads, mainly Thornell Road. Later at nignt, snow became mixed with and then went to light rain for a period. This helped to compress the snow and make it wetter in density. Snow mixed with & changed to rain after 22:00 and temps went to 32 by 22:45. Remained above freezing till obs time at 08:00. |
| 1/20/2020 |
6:00 AM |
0.04 |
2.4 |
M |
6.0 |
M |
Temp range 32/15. |
| 1/21/2020 |
8:00 AM |
T |
0.2 |
M |
5.0 |
M |
Temp range 21/10. |
| 1/22/2020 |
8:00 AM |
T |
T |
M |
4.5 |
M |
Temp range 28/19. |
| 1/23/2020 |
6:30 AM |
0.00 |
0.0 |
M |
4.0 |
M |
Temp range 35/11. |
| 1/24/2020 |
8:00 AM |
0.00 |
0.0 |
M |
3.0 |
M |
Temp range 38/28. |
| 1/25/2020 |
7:00 AM |
0.10 |
0.0 |
M |
2.5 |
M |
Temp range 45/35. |
| 1/26/2020 |
9:00 AM |
0.37 |
T |
M |
1.0 |
M |
Temp range: 36/32. |
| 1/27/2020 |
9:00 AM |
0.06 |
0.2 |
M |
0.5 |
M |
Temp range 37/32. |
| 1/28/2020 |
5:30 AM |
0.03 |
0.3 |
M |
0.5 |
M |
Temp range 36/30. Low overcast much of Monday. Monday night, drizzle developed along with we snowflakes. Temps below freezing at obs time, with coating of frozen hydrometers on roads and driveways. Light freezing drizzle in progress. |
| 1/29/2020 |
9:00 AM |
0.17 |
1.0 |
M |
1.5 |
M |
Temp range 33/24. Pretty much an all day and all night very light snow regime, locked in. NW flow off Georgian Bay-Lk Ontario keeping our zone locked in with gray skies and tiny snow needles, plates, and flakes. Accumulations of around an inch since early readings yesterday. With approaching surface high pressure over Ontario, precip expected to shut down and the low cloud layers to thin out. Meltdown amount was amended; earlier amount was an estimate. |
| 1/30/2020 |
7:30 AM |
T |
0.1 |
M |
1.5 |
M |
Temp range 27/14. Leftover morning flurries, then overcast with breaks in overcast (binovc),in the afternoon. Light N/NE breeze to near calm. Partial clearing by sundown. Overnight, sct'd to bkn cirroform clouds. Radiational cooling in full force. Lows in lower teens, but colder spots south of station in single numbers. At obs, spectacular orange colors to the southeast, around sunrise time. |
| 1/31/2020 |
8:00 AM |
0.00 |
0.0 |
M |
1.0 |
M |
Temp range 30/19. Overcast, but sunny breaks later in the day. Overnight, partly clear. No precip, and one of the better days of the week. |
| 2/1/2020 |
9:00 AM |
0.01 |
0.2 |
M |
1.0 |
M |
Temp range 32/28. Low overcast all day Friday into the night. Light snow returned by 19:00 hour and shut down before midnight. Amounts light, but created slippery surfaces on pavement. At obs time, low overcast and 30. |
| 2/2/2020 |
9:00 AM |
0.02 |
0.5 |
M |
1.5 |
M |
Temp range 33/29. |
| 2/3/2020 |
6:00 AM |
0.17 |
0.9 |
M |
1.5 |
M |
Temp range 34 max Sunday/32 min Sunday night. At early obs time, temp has risen to 36. New snow broke out after 10:30 Sunday morning with slow moving warm front crossing area. Snow shut down late in day, but another band moved in by approximately 19:00 EST for a short duration. Otherwise, night remained overcast with increasing westerly breezes. |
| 2/4/2020 |
8:00 AM |
0.00 |
0.0 |
M |
T |
M |
Temp range 46/32. Morning clouds Monday yielded to partial clearing in the afternoon. Leftover Sc clouds along with sct'd mid level and cirroform clouds later in day. Overnight, near calm as a weak cold front slipped through with a wind shift to the N. At obs time, low overcast and 34. |
| 2/5/2020 |
8:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
|
| 2/6/2020 |
7:30 AM |
0.41 |
5.2 |
M |
5.5 |
M |
Temp range 28/24. Limited sun and Sc clouds much of the day, with NE-E breezes. Thickening clouds near end of day, with snow breaking out later in evening. Ended before 7am as it changed to -ZL at end of this first event. More to come late tonight. At obs, overcast and 26. |
| 2/7/2020 |
8:00 AM |
0.45 |
1.5 |
M |
6.0 |
M |
Temp range 32/25. Meltdown of freezing rain/snow is an estimated amount. Rain gauge value contaminated. Day on Thursday was dry until about 15:00, when sleet and then freezing drizzle arrived. Snow pack has been compressed with an ice coating crunch on top. During the night, mainly a misty drizzle as temps hovered at 29. Before dawn, a changeover to light snow. Flakes are small, so accumulation rates up through 8am have yielded only 1.5" of new snow. |
| 2/8/2020 |
8:00 AM |
0.42 |
5.7 |
M |
11.0 |
M |
Temp range 29/17. Snow event associated with surface cyclone ended at 16:45, followed by partial clearing. Clear to partly cloudy up through midnight. Light lake effect snow started by dawn. At obs, light fluffy snow and 19. Overcast, no wind. |
| 2/9/2020 |
8:00 AM |
0.04 |
3.3 |
M |
10.0 |
M |
Temp range 19/05. At obs time, light snow and 17. |
| 2/10/2020 |
8:00 AM |
0.04 |
0.6 |
M |
5.5 |
M |
Temp range 35/32. |
| 2/11/2020 |
8:00 AM |
0.00 |
0.0 |
M |
4.0 |
M |
Temp range 36/31. |
| 2/12/2020 |
8:00 AM |
0.00 |
0.0 |
M |
2.0 |
M |
|
| 2/13/2020 |
8:00 AM |
0.19 |
1.3 |
M |
2.0 |
M |
Temp range 40/31. |
| 2/14/2020 |
6:00 AM |
0.02 |
1.5 |
M |
3.5 |
M |
Temp range 35/7. Snowfall value amended slightly. |
| 2/15/2020 |
8:00 AM |
0.00 |
0.0 |
M |
3.5 |
M |
Temp range 16/-2. |
| 2/16/2020 |
8:00 AM |
0.00 |
0.0 |
M |
3.5 |
M |
Temp range 34/32. |
| 2/22/2020 |
8:00 AM |
0.00 |
0.0 |
M |
2.0 |
M |
Temp range 34/28. A completely sunny day Friday. From SR to SS. Overnight, clear skies. One constant: the wind. It has been persistent, and stronger during the daylight hours. At obs, sunny and 30. |
| 2/27/2020 |
8:00 AM |
0.31 |
1.0 |
M |
1.0 |
M |
|
| 2/28/2020 |
8:00 AM |
T |
T |
M |
1.0 |
M |
|
| 2/29/2020 |
8:00 AM |
0.04 |
1.0 |
M |
2.0 |
M |
Temp range 27/14. |
| 3/3/2020 |
8:00 AM |
0.05 |
0.0 |
M |
0.0 |
M |
Temp range 54/41. |
| 3/4/2020 |
8:00 AM |
0.33 |
0.0 |
M |
0.0 |
M |
Temp range 50/36. |
| 3/5/2020 |
8:00 AM |
0.01 |
T |
M |
0.0 |
M |
Temp range 46/33. After a partly sunny day, skies clouded up after 14:30, with light rain & snowshowers breaking out after 16:45. A second, more impressive round struck after 20:00. Wx Radar picked up a nearly circular blob of moderate precip. Started as rain and quickly went over to graupel & then wet snowflakes, espcially just north of this wx station. All of it shut down before 21:30. At obs time, Sc deck and 34. |
| 3/7/2020 |
8:00 AM |
0.15 |
1.7 |
M |
1.5 |
M |
Temp range: 43/26. Increasing clouds Friday as the center of low pressure passed over WNY from Ontario and then east of us. Light E winds went to near calm, and then to a freshening N-NE wind in the afternoon. Temps maxed out late morning, then started dropping into 30s, especially with onset of snow at 14:55. Snow became productive after 17:00 at dusk, and shut down by midnight. Measurements made twice to ensure accurate snow catch and meltdown. At obs time partly sunny with Sc clouds and 26. |
| 3/10/2020 |
9:00 AM |
T |
0.0 |
M |
0.0 |
M |
Temp range 67/51. |
| 3/11/2020 |
9:00 AM |
0.04 |
0.0 |
M |
0.0 |
M |
Temp range 59/25. |
| 3/12/2020 |
9:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 41/33. |
| 3/13/2020 |
9:00 AM |
0.08 |
0.0 |
M |
0.0 |
M |
|
| 3/14/2020 |
9:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 52/34. Mostly Cloudy with sunny intervals. Slowly falling temps during Friday. Big story was another wind event. High W-NW winds raked area all day, with peak gusts of 45 knots in the afternoon. A secondary surge of high winds after midnight. Downed branches and twigs littering area. At obs time, Sc deck, a light breeze from the N-NE and 37. |
| 3/16/2020 |
9:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 38/19. CAVU with a gentle NE breeze. Not a cloud in site entire day till near sunset..some contrails noted near sundown. No Cu nor Sc in this cA airmass. Overnight, clear and calm with strong radiational cooling. Lows in upper teens away from city of Rochester. At morning obs, 8am EST (add 1 hour for DST), sunny and 21. No wind. Frost noted on grassy surfaces and roofs. |
| 3/17/2020 |
9:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 52/39. |
| 3/18/2020 |
9:00 AM |
0.04 |
0.0 |
M |
0.0 |
M |
Temp range 46/26. |
| 3/19/2020 |
9:00 AM |
0.16 |
0.0 |
M |
0.0 |
M |
Temp range 48/41. |
| 3/20/2020 |
9:00 AM |
0.18 |
0.0 |
M |
0.0 |
M |
Temp range 42/53/64 present. At obs time, temps still climbing towards mid 60s. Showers overnight as warm front pressed north. Winds are light at obs time, but expecting gale force wind field to overspread area by midday and afternoon hours on Friday. |
| 3/21/2020 |
5:40 AM |
0.04 |
0.0 |
M |
0.0 |
M |
Temp range 70/28. Warmest day since March 9th and Jan.11th, but this day highest max of year, eclipsing the other two dates. Successful warm fropa and a few hours in the warm sector. Freshening wind from the S-SW shifted to NW by 13:00 (add 1 hour for DST). Afternoon rain showers associated with cold fropa and even stronger winds as area was placed under a wind advisory. Peak gusts of 45 knots, but areas north of us had stronger wind values. Strong CAA continued well into the night, with CAA ceasing by 00:30 (01:30 DST), along with the wind. Low cloud deck remains in place with upslope flow. Towards obs time, winds much lighter, but temps now hovering at 28. Incredible range of temperatures due to the passage of a major cyclone and it's associated warm sector and then blast of cold air in it's wake. At early obs time, low overcast and 29. |
| 3/22/2020 |
9:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 32/17. Overcast Saturday morning, followed by clearing in afternoon. NE breeze with strong anticyclone building in from western Ontario province. Patchy high cirrus noted to the N and NE of area later Saturday into Saturday night. Followed by clear skies and strong radiational cooling overnight. At obs time, CAVU and 25. |
| 3/23/2020 |
9:00 AM |
0.09 |
0.5 |
M |
T |
M |
Temp range 40/32. |
| 3/24/2020 |
9:00 AM |
0.26 |
T |
M |
0.0 |
M |
Temp range 37/33. |
| 3/29/2020 |
9:00 AM |
0.39 |
0.0 |
M |
0.0 |
M |
|
| 3/30/2020 |
9:00 AM |
0.17 |
0.0 |
M |
0.0 |
M |
|
| 3/31/2020 |
9:00 AM |
0.14 |
0.0 |
M |
0.0 |
M |
Temp range 48/39. |
| 4/3/2020 |
9:00 AM |
T |
0.0 |
M |
0.0 |
M |
Temp range 54/38. Unlimited sun but with a stiff NW wind present all day. In the evening, higher cirrus clouds approaching from the NE, courtesy of an intense, fully occluded ocean cyclone, SE of New England. By obs time, low overcast with drizzle on the 3rd. |
| 4/4/2020 |
9:00 AM |
0.14 |
0.0 |
M |
0.0 |
M |
Temp range 45/42. Overcast and dreary, light N-NE drift.
Periods of light rain and drizzle. Overnight, overcast, damp, chilly. At obs, overcast and 44. |
| 4/8/2020 |
9:00 AM |
0.29 |
0.0 |
M |
0.0 |
M |
|
| 4/9/2020 |
9:00 AM |
0.03 |
0.0 |
M |
0.0 |
M |
|
| 4/10/2020 |
9:00 AM |
0.09 |
1.0 |
M |
1.0 |
M |
Temp range 49/31. First of two cold fronts crossed our airspace. First one, at 09:05 accompanied by a sudden increase of wind and windshift. Minutes later, rain that quickly switched over to wet snow. Following that, partly cloudy skies returned with maxing out to near 50 by 15:00. Overnight, clear skies followed by clouds. Sometime after 3am, snow broke out. At obs time, light snow, windy at times, and 32. |
| 4/11/2020 |
9:00 AM |
0.11 |
1.1 |
M |
0.0 |
M |
Temp range 44/31. Snow continued to fall, moderate at times with 1/2 mi visibility through most of the morning. Cutoff of snow occurred by 11:05-11:10, Standard Time (add one hour for DST). Afternoon, clouds remained, with BINOVC as Strato-Cu clouds remained. Winds, light in the morning, picked up noticeably in the afternoon from the W-WNW. Overnight, brief flurries after dusk, then skies cleared out. Windy at times. At obs time, sunny and in mid 30s. Snow on ground was gone by late afternoon Friday, hence no "depth" on ground on the Saturday morning obs. |
| 4/13/2020 |
9:00 AM |
0.14 |
0.0 |
M |
0.0 |
M |
|
| 4/14/2020 |
9:00 AM |
0.19 |
0.0 |
M |
0.0 |
M |
Temp range 66/34. |
| 4/15/2020 |
9:00 AM |
T |
0.1 |
M |
T |
M |
Temp range 46/30. |
| 4/16/2020 |
9:00 AM |
0.14 |
0.8 |
M |
0.8 |
M |
Temp range 44/26. Times quoted on STANDARD time. |
| 4/17/2020 |
9:00 AM |
0.03 |
0.4 |
M |
T |
M |
Temp range 40/30. Limited sun interspersed with snow showers. Shortly after 13:45 Standard Time, an intense snowsquall swept through. Snow pellets shaped like stars hit, then regular snow. In a matter of minutes, just under a half inch of snow accumulated. Visibilities dropped to near zero to 1/8 mile in the worst of it, along with some wind. Later in day, sun returned. Overnight, partly cloudy, mainly lake cloud Sc, as hard freeze dropped values into upper 20s to 30.
At obs, sun filtered through high clouds and 34. |
| 4/18/2020 |
9:00 AM |
0.13 |
0.1 |
M |
T |
M |
Temp range 42/33. |
| 4/19/2020 |
9:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 47/37. Overcast skies, with partial clearing later in the day. Windy at times, brisk from the WSW. |
| 4/20/2020 |
9:00 AM |
0.19 |
0.0 |
M |
0.0 |
M |
Temp range 57/29. Morning sun, then abrupt change to overcast with rain developing early afternoon. Shut down a few hours later. Overnight, skies cleared and radiational cooling allowed for sub-freezing temperatures. At obs time, sunny with sct'd Cu clouds forming and 35. Precip data below on Standard Time. |
| 4/21/2020 |
9:15 AM |
0.07 |
0.0 |
M |
0.0 |
M |
Temp range 48/36. CAVU skies Monday, with few Cu clouds in the morning. High pressure ridge with NE-E flow kept area cool. Towards dusk, high clouds appeared over western-NW horizon, early indicator of approaching short wave and associated cold front. Cold frontal passage occurred in the hour preceding observation. Wind shift and increase in winds as a moderate band of showers crossed station. At obs, light drizzle, windy with temp falling to |
| 4/22/2020 |
9:00 AM |
0.02 |
0.3 |
M |
T |
M |
Temp range 44/29. Periods of snowshowers in the afternoon. Overnight, accumulating light snow broke out after 22:30 LST (add 1 hour for DST). These were multi band squalls coming off Lake Ontario along with notable increase in wind. Speaking of wind, near gale to gale force winds howled much of the day late into the night. Gusts to 40 knots. Trace of snow on ground at obs time, which means protected areas from wind. |
| 4/23/2020 |
9:00 AM |
T |
T |
M |
0.0 |
M |
Temp range 40/28. Some morning clouds with a passing flurry of snow. Then, mostly sunny. Winds remain strong & persistent from the WNW, 15-30knot. Overnight, winds subsided under a clear sky. By morning, Sc cloud deck, to our southwest was advancing northeastbound. Temp at obs time 33. |
| 4/24/2020 |
9:00 AM |
0.14 |
0.0 |
M |
0.0 |
M |
Temp range 44/36. Sc deck arrived from the SW since last obs time yesterday, shortly after 08:00 LST. By mid to late afternoon, steady light rain arrived as a warm front worked it's way northeast bound from southern tier. Precip ended by dinner time. Overnight, low clouds remain. At obs time, mostly cloudy and 44. |
| 4/25/2020 |
9:00 AM |
T |
0.0 |
M |
0.0 |
M |
Temp range 54/34. Mostly overcast day. Early evening there was a brief rainshower. Following that, skies cleared later and at obs time, brilliant blue skies, no clouds in sight. Temp at 40. |
| 4/26/2020 |
9:45 AM |
0.20 |
0.0 |
M |
0.0 |
M |
Temp range 61/43. Brilliant blue skies in the morning to midday, then wisps of high clouds appeared in the afternoon. NE-ENE breezes during the day and evening. Overnight, skies clouded up with rain breaking out after midnight. At late obs time, still light rain and temp near 45. |
| 4/27/2020 |
9:00 AM |
0.65 |
0.0 |
M |
0.0 |
M |
Temp range 45/38. Rain all day and into the night. When it didn't rain, drizzle fell instead. Temps unusually chilly (not an uncommon) theme much of the past week. This contrasts with the max of 61 on Saturday (yesterday's report). At obs, light rain and 38. |
| 4/28/2020 |
9:00 AM |
0.03 |
0.0 |
M |
0.0 |
M |
Temp range 51/32. Overcast skies gave way to gradual clearing after mid afternoon. Full sunshine noted by late afternoon. Clear skies overnight. Little wind noted. At obs time, a solid stratus type overcast has returned. Temp at 40. |
| 4/29/2020 |
9:00 AM |
0.01 |
0.0 |
M |
0.0 |
M |
Temp range 58/45. |
| 4/30/2020 |
9:00 AM |
0.08 |
0.0 |
M |
0.0 |
M |
Temp range 68/53. |
| 5/1/2020 |
9:00 AM |
0.65 |
0.0 |
M |
0.0 |
M |
Temp range: 62/45. |
| 5/2/2020 |
9:00 AM |
T |
0.0 |
M |
0.0 |
M |
Temperature range: 55/41. Overcast day, but gradual clearing occurred very late into the day. A brief shower preceded the clearing. Overnight, mainly clear. Temps dropped into the 30s at lower elevations.
At obs time, plenty of sun and 52 at 08:00 (Standard Time), 9am DST. |
| 5/3/2020 |
9:00 AM |
0.02 |
0.0 |
M |
0.0 |
M |
Temp range 68/49. |
| 5/4/2020 |
9:00 AM |
0.01 |
0.0 |
M |
0.0 |
M |
Temp range 75/45. A surge of warmth arrives for one day, Sunday. Accompanied by strong W/WSW winds, even some lawn receptacles got blown around. Sunshine was abundant, with sct'd Cu. In the afternoon, some Ci visible to the west. Shortly after 18:10 Standard Time, or 19:10 EDT, a windshift occurred to the N/NE and speeds way down. Front or lake breeze boundary had slipped through. Overnight, thickening clouds at mid and high levels continued. Showers arrived after 07:30 & continued through the obs time. Temp at 9am at 45. |
| 5/5/2020 |
7:30 AM |
0.03 |
0.0 |
M |
0.0 |
M |
Temp range 50/30. Morning light shower, followed by overcast skies, Sc mainly, and NW winds 10-20 knots. Day was primarily in the 40s. Late afternoon, skies partially cleared with sun leaking through the clouds. Overnight, clear to patchy Sc clouds with a breeze, but near calm at sunrise. A freeze warning was issued for most of western NY down to PA line. At early obs, sunny and 32, at 06:30 Standard Time, 07:30 EDT. |
| 5/6/2020 |
9:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 48/34. Exceptionally dry air feeding in with a NE breeze overnight. Dewpoints near 20. |
| 5/8/2020 |
8:45 AM |
0.08 |
0.0 |
M |
0.0 |
M |
Temp range 59/34. Sunny in the morning to early afternoon, as temps headed towards upper 50s. After 16:30 DST, a quick moving band of rain blossomed into a TS (thunderstorm), as it quickly exited the county. Strong downdraft from this feature and a windshift from west to north. Temps crashed from 58 at 1645 to 1745. TS duration was about 3 minutes as it rapidly sped eastward along the I-90 corridor. A second round of just rain arrived by 1745-1800. Clearing followed by sundown. Overnight, mainly clear as the moon lit the area with a notable low lunar angle of lighting in the southern sky. At obs time, mostly cloudy and 43. |
| 5/9/2020 |
9:00 AM |
0.01 |
T |
M |
0.0 |
M |
Temp range 43/29. A late season polar outbreak deepened it's grip in our region the past 24 hour recording period. Periods of snowshowers developed by midday Friday and Friday afternoon. Visibilities briefly dipping to a mile. No measurable accumulation, but a brief dusting seen briefly at night. Winds from the NW and gusty at times. Hard freeze again, much like last weekend. Daffodils now drooped on the ground. Overnight, clear to mostly cloudy. Birdbath water has turned to ice. At obs time, 33 and mostly cloudy. |
| 5/10/2020 |
9:00 AM |
0.05 |
0.3 |
M |
0.0 |
M |
Temp range 40/34. |
| 5/11/2020 |
9:00 AM |
0.03 |
0.0 |
M |
0.0 |
M |
Temp range 54/40. Nice recovery on temperatures Sunday after the record chill of Saturday. Mostly cloudy w/ sunny intervals. After 13:30 (14:30 DST), temps dropped with the passage of a cool front. Temps in the 40s by late afternoon. Overnight, light showers and drizzle. At obs time, thick overcast, drizzle. Interior lighting needed, 42 deg. |
| 5/12/2020 |
9:00 AM |
0.27 |
0.0 |
M |
0.0 |
M |
Temp range 42/32. Overcast all day with periods of rain showers. Much like Saturday, temps barely higher, with a daytime max of 42. Partial clearing noted towards evening and dusk. Overnight, mostly clear with some wave clouds present. At obs time, mainly sunny, with sct'd Cu and higher Ci noted to our west/northwest. Breezy as well and 40 at obs time. |
| 5/13/2020 |
9:00 AM |
T |
T |
M |
0.0 |
M |
Temp range 48/28. Mixed sun and clouds in the morning. Afternoon became overcast with middle and high clouds. Then, at 17:20 EST (18:20 EDT), rain showers arrived. Within minutes, it changed to snow. Event ended about 15 minutes later. Partial clearing towards dusk, and then clear overnight and calm. Resulted in a minimum temperature lowest of them all this past cold week. At obs time, brilliant blue sky, light breeze and 38. |
| 5/14/2020 |
9:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 56/33. Beautiful day with abundant sunshine and cloud free skies, deep blue color. South of I-90, Cu cloud field noted. Surface winds E/NE likely cause with big lake keep temps cooler, keeping atmosphere stable. Overnight, clear skies giving way to increasing clouds after 4am. At obs time, mid level overcast and 42. |
| 5/15/2020 |
8:00 AM |
0.04 |
0.0 |
M |
0.0 |
M |
Temp range 67/55. Some sun then turning overcast with showers developing by 18:00 LST (19:00 LDT). Lasted a couple of hours at most and then shut down. Overcast overnight, and a tad humid for first time this season. Warm frontal passage successful. Light S breeze at times. At earlier than normal obs time, overcast and 59. |
| 5/16/2020 |
8:30 AM |
0.22 |
0.0 |
M |
0.0 |
M |
Temp range 80/50. |
| 5/17/2020 |
9:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 66/42. Morning Sc clouds trapped beneath subsidence inversion mixed out to mostly sunny skies by mid afternoon Saturday. Gentle NE breeze. Towards evening, Sc clouds gone, but an increase in higher cirroform clouds noted from the W-SW. Overnight, mostly clear, calm. At obs time, mostly sunny, higher clouds visible and 55. |
| 5/18/2020 |
9:00 AM |
0.48 |
M |
M |
M |
M |
|
| 5/19/2020 |
9:00 AM |
0.05 |
0.0 |
M |
0.0 |
M |
|
| 5/20/2020 |
9:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 72/46. |
| 5/21/2020 |
9:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 73/42. CAVU with deep blue skies Wednesday. A high cirrus deck visible towards SW horizon, a feature that has been seen on other days as well. Overnight, clear and chilly. At obs, unlimited sun once again, no cirrus deck. Temps rising to 55. |
| 5/22/2020 |
9:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 77/56. Brilliant sun, deep blue skies. A few wisps of Ci cloud to our north. Short length jet contrails visible during late afternoon. Still, little air traffic compared to months ago. Air nearly calm. Later in day, light variable breezes. Dewpoints in mid to upper 30s. Overnight, clear skies, but milder compared to previous nights. At 8am ST obs time (9a DST), sunny and 66. |
| 5/23/2020 |
8:45 AM |
0.12 |
0.0 |
M |
0.0 |
M |
Temp range 78/64. |
| 5/24/2020 |
9:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 77/57. |
| 5/25/2020 |
9:30 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 82/66. Mainly sunny skies, along with a stiff breeze from the south at times. Lots of leaf debris and seeds falling from nearby trees. Dewpoints near 60. Towards sundown and overnight, patchy mid level clouds, with breezy conditions continuing. At obs time, partly sunny and 72. |
| 5/26/2020 |
9:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 86/63. |
| 5/27/2020 |
6:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 91/70. Records broken for the date. Sunshine mixed with Cu by afternoon. A drier type of heat, as dewpoint temps remained near 60. A light breeze from the SW. Seeds continue to drop from nearby trees. Record max's in BUF, ROC, SYR, AVP, among others. Overnight, clear to partly cloudy and warm. At early obs time, party cloudy and 71. |
| 5/28/2020 |
9:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 87/70. |
| 5/29/2020 |
8:45 AM |
0.05 |
0.0 |
M |
0.0 |
M |
Temp range 79/67. |
| 5/30/2020 |
8:45 AM |
0.89 |
0.0 |
M |
0.0 |
M |
Temp range: 82/55. Warm and humid as dewpoint temps approached 70. Partly cloudy. Prefrontal trough triggered an intense downpour mid afternoon. Less intense waves of showers followed later in afternoon and early evening. Cooler air arrived overnight. At obs time, partly sunny and 60. |
| 5/31/2020 |
8:00 AM |
0.15 |
0.0 |
M |
0.0 |
M |
Temp range 68/45. |
| 6/1/2020 |
9:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 59/45. Unusually cool day with intervals of clouds & sun. A brisk NW breeze. Dewpoints in the 40s. Late in the afternoon Cu clouds parted ways, only to allow a mid level Ac deck to arrive on NW upper flow. Overnight, partly to mostly skies, giving way to clearing by dawn. At obs, mostly sunny and 55. |
| 6/2/2020 |
8:00 AM |
0.01 |
0.0 |
M |
0.0 |
M |
Temp range 69/55. Nice day with sunny intervals and times of mid level clouds. A good breeze at times from the west/nw. Dewpoints near 40. Overnight, increasing clouds and not as cool as previous nights. A passing sprinkle after daybreak, with warm front approaching and showers traveling NW to SE ahead of boundary. No wind. |
| 6/3/2020 |
9:00 AM |
0.06 |
0.0 |
M |
0.0 |
M |
|
| 6/4/2020 |
9:00 AM |
0.41 |
0.0 |
M |
0.0 |
M |
|
| 6/5/2020 |
6:00 AM |
T |
0.0 |
M |
0.0 |
M |
Temp range 83/66. |
| 6/6/2020 |
9:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 84/65. |
| 6/7/2020 |
9:00 AM |
T |
0.0 |
M |
0.0 |
M |
Temp range 77/52. |
| 6/8/2020 |
9:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 68/49. |
| 6/9/2020 |
9:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 73/55. |
| 6/10/2020 |
9:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
|
| 6/11/2020 |
9:00 AM |
0.24 |
0.0 |
M |
0.0 |
M |
Temp range 91/69. |
| 6/12/2020 |
9:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 75/60. Much cooler and less humid compared to previous 24 hour period. Windy as well. |
| 6/13/2020 |
9:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
|
| 6/14/2020 |
9:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 59/40. |
| 6/15/2020 |
9:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 64/43. |
| 6/16/2020 |
9:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 72/45. |
| 6/17/2020 |
9:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 78/50. Sunny and dry once again. But temps are slowly creeping higher and higher. Humidity still low. Soil is dry. |
| 6/18/2020 |
9:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 82/57. Another day of sunrise to sunset sunshine. No clouds seen, except for a thin cirrus patch after 19:30 towards the W/NW. Little to no breeze, except for later in day with delta breeze. Overnight, clear and cool. Humidity/dewpoint still on the low side...in the 50s. |
| 6/19/2020 |
6:30 AM |
T |
0.0 |
M |
0.0 |
M |
Temp range 84/61. For the first time since the weekend, Cu, TCu and Ci clouds were visible in our skies after a sunny, warm and dry morning. Afternoon saw the new development of the clouds with the circulation of the upper low from the mid Atlantic. A few showers noted on wx radar, pushing in from the BGM-ITH area (SE to NW movement). One of the weakening showers grazed the location here with just a few drops during the evening.
Overnight, after a spectacular sunset with clouds lit up. it then cleared. Temps dropped to near 61. At early obs time, sunny and 62. |
| 6/20/2020 |
7:00 AM |
T |
0.0 |
M |
0.0 |
M |
Temp range 85/62. |
| 6/21/2020 |
9:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 84/63. |
| 6/22/2020 |
9:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 87/66. |
| 6/23/2020 |
9:00 AM |
0.72 |
0.0 |
M |
0.0 |
M |
Temp range 87/64. |
| 6/24/2020 |
8:30 AM |
0.16 |
0.0 |
M |
0.0 |
M |
Temp range 82/62. Rainbow visible after 20:40 till sundown to the E-SE. Finally, a cold frontal passage is allowing for cooler, breezy and drier conditions overnight thru the obs time this morning. Sunny with sct'd Cu and 65, brisk W-NW breeze. |
| 6/25/2020 |
9:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 75/56. Refreshing day with sun and Cu clouds. Drier and cooler air mass in place with brisk NW winds, gusting to 30 knots into early afternoon. Some tree limbs broken off. Overnight, mostly clear and quite cool. |
| 6/26/2020 |
9:00 AM |
0.04 |
0.0 |
M |
0.0 |
M |
Temp range 77/57. Sunny skies gave way Cu clouds in afternoon. Eventually, T-storms developed in response to instability and suspected passage of a minor shortwave. T-storm that affected us blew up over Honeoye Falls/Mendon and quickly blew up to a sizeable storm. Passed over SE Pittsford, Mendon, Fishers and Victor. Rainfall much heavier over Eastview Mall area. Afterwards, skies returned to sunshine and clouds mixed. Latest sunset of year, allowing for extended twilight. Overnight, mostly clear and cool. Winds, light. |
| 6/27/2020 |
8:45 AM |
0.35 |
0.0 |
M |
0.0 |
M |
Temp range 81/58. Sunny skies Friday with a gentle breeze at times. Increasing high clouds by late sundown.
Light rain developed just before 6am EDT. Ended just before obs..to a light spotty drizzle. Overcast and 64 at obs time. |
| 6/28/2020 |
9:00 AM |
0.38 |
0.0 |
M |
0.0 |
M |
Temp range 79/67. |
| 6/29/2020 |
9:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
|
| 6/30/2020 |
9:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
|
| 7/1/2020 |
9:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
|
| 7/2/2020 |
9:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 81/61. |
| 7/3/2020 |
9:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range: 89/69. |
| 7/4/2020 |
9:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range: 84/63. |
| 7/5/2020 |
8:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 82/60. |
| 7/6/2020 |
9:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 86/62. Remains very dry. Sunshine with plenty of high cirrus and the most jet contrails witnessed in months. |
| 7/7/2020 |
9:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 88/64. |
| 7/8/2020 |
9:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 92/72. |
| 7/9/2020 |
9:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 89/71. |
| 7/10/2020 |
9:00 AM |
T |
0.0 |
M |
0.0 |
M |
Temp range 92/71. Record heat in region. ROC airport reached 97...highest maximum since the hot summer of 2012. BUF airport reached 98, second hottest value ever observed. High pressure ridge axis crossed overhead at 200mb during day, suppressing any convention. Late in day, a cell blew up just to our southwest. For a brief minute, after 7pm EDT, large rain drops fell, wetting parts of the street. It then moved on. Overnight, mostly clear and humid. At obs, sunny with high Ci present, especially to the southeast of station, and 81. |
| 7/11/2020 |
8:30 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 89/73. Still unusually warm and humid. Sunshine replaced by cirrostratus clouds in the afternoon, advecting in from the southeast...outer cloud bands from Tropical Storm Fay. Outer rain bands came very close to station by later Friday night, to western Wayne and Ontario counties. Brisk SE winds started by late afternoon, as effects from the landfalling tropical system in NJ were being felt here.
At morning obs, mostly sunny, but with mid level clouds gathering to our west. That feature is in response to a slow moving low pressure area centered over eastern Lake Erie, showing heavy showers and embedded thunderstorms in that region. And it's moving towards western NY. Rainfall is needed, soils are dry. Lawns turning to brown in some areas. |
| 7/12/2020 |
8:00 AM |
2.80 |
0.0 |
M |
0.0 |
M |
Temp range 81/66. Very heavy rainfall fell mid to late afternoon, in several waves. Humid air, along with a small synoptic scale low pressure and associated short wave came rotating through and overhead. Gutters overflowed and water runoff caused flooding in area homes in their cellars. Following passage of this vigorous feature, skies cleared and replaced by a cooler and drier air mass. At obs time, sunny and 67. |
| 7/13/2020 |
9:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
|
| 7/14/2020 |
9:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
|
| 7/15/2020 |
9:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
|
| 7/16/2020 |
8:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 81/72. |
| 7/17/2020 |
6:45 AM |
1.88 |
0.0 |
M |
0.0 |
M |
|
| 7/18/2020 |
8:00 AM |
T |
0.0 |
M |
0.0 |
M |
|
| 7/19/2020 |
8:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 86/68. |
| 7/20/2020 |
8:00 AM |
0.05 |
0.0 |
M |
0.0 |
M |
Temp range 89/73. |
| 7/21/2020 |
8:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
|
| 7/22/2020 |
8:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 78/64. |
| 7/23/2020 |
8:00 AM |
0.12 |
0.0 |
M |
0.0 |
M |
Temp range: 79/71. |
| 7/24/2020 |
8:00 AM |
0.03 |
0.0 |
M |
0.0 |
M |
Temp range 80/63. |
| 7/25/2020 |
8:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 82/62. Lower humidity with a "nice breeze," by the afternoon. Cool and comfortable overnight. A rarity this persistently warm and humid month. |
| 7/26/2020 |
9:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 84/64. Mainly sunny with plenty of high cirrus blowoff clouds and sct'd Cu clouds at 5500 feet. Dewpoints in upper 50s, but rose to the low to mid 60s by Saturday night. Dry day, no precip. |
| 7/28/2020 |
8:00 AM |
0.45 |
0.0 |
M |
0.0 |
M |
|
| 7/29/2020 |
8:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
|
| 7/30/2020 |
8:00 AM |
0.27 |
0.0 |
M |
0.0 |
M |
|
| 7/31/2020 |
8:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
|
| 8/1/2020 |
8:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
|
| 8/2/2020 |
9:00 AM |
0.14 |
0.0 |
M |
0.0 |
M |
|
| 8/3/2020 |
9:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range: 86/67. Partly sunny, humid, and unusually windy day. Winds out of the S-SW, gusts to 30 knots. The breeze continued well into the evening hours. A cold front pushed through dry after 20:00 hours. At obs time, mostly cloudy and 68. |
| 8/4/2020 |
8:00 AM |
1.63 |
0.0 |
M |
0.0 |
M |
Temp range: 80/65. Torrential rain event due to strong thunderstorm line. Cluster of heaviest cells came right over southern Pittsford/northern Mendon. In 25 minutes, 1.60 inches of rain fell. Gutters overtopped with water. Basement wall became a waterfall, with water stream on floor. Other areas in this part of town have new lakes. Some tree branches down about 2 miles NNW of station. Remainder of night was quiet, except for a brief light rain interval At obs time, solid overcast and 67. Cloud shield courtesy of tropical cyclone over Virginia, racing NNE at 28 knots. Should be pointed out that this is the THIRD such extreme rainfall event this year, starting in June. This is the second such intense rainfall event in the past four weeks. |
| 8/5/2020 |
8:00 AM |
1.36 |
0.0 |
M |
0.0 |
M |
Overcast and humid. What appeared to be on radar, a rain band, curved cyclonically...developed over station and extended to the S. This happened late morning. The result was another torrential downpour. It ended as light rain during the 2 hour interval. Remainder of afternoon, showed binovc, with low level clouds racing quickly from NW to SE. More light sprinkles during dusk. Airmass quickly transitioned to much drier air during the overnight. Tropical cyclone rain shield featuring heavy rains remained 40-60 miles to our east. |
| 8/6/2020 |
8:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
|
| 8/7/2020 |
8:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
|
| 8/8/2020 |
8:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
|
| 8/9/2020 |
8:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
|
| 8/10/2020 |
8:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
|
| 8/11/2020 |
8:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
|
| 8/12/2020 |
8:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
|
| 8/13/2020 |
8:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
|
| 8/14/2020 |
8:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 83/60. |
| 8/15/2020 |
8:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
|
| 8/16/2020 |
8:00 AM |
0.01 |
0.0 |
M |
0.0 |
M |
|
| 8/17/2020 |
8:00 AM |
1.30 |
0.0 |
M |
0.0 |
M |
Temp range 75/61. Overcast, and dark day. Interior lighting needed. Rain broke out early afternoon, and ended by mid afternoon. Another round accompanied by thunderstorms arrived just before 9pm. First significant cold front arrived pre-dawn. More cold fronts (secondary and third) will push through during the next day. Bringing us a welcome break from persistent elevated temperatures and humidity. At obs time, partly sunny, slight NW breeze and 66. |
| 8/18/2020 |
8:00 AM |
0.02 |
0.0 |
M |
0.0 |
M |
Temp range 76/58. |
| 8/19/2020 |
8:00 AM |
0.03 |
0.0 |
M |
0.0 |
M |
Temp range 76/57. |
| 8/20/2020 |
7:00 AM |
0.10 |
0.0 |
M |
0.0 |
M |
Temp range 74/52. |
| 8/21/2020 |
8:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 77/58. |
| 8/22/2020 |
8:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
|
| 8/23/2020 |
8:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 83/65. |
| 8/24/2020 |
8:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 85/64. |
| 8/25/2020 |
8:00 AM |
0.41 |
0.0 |
M |
0.0 |
M |
|
| 8/26/2020 |
8:00 AM |
0.05 |
0.0 |
M |
0.0 |
M |
|
| 8/27/2020 |
6:00 AM |
0.13 |
0.0 |
M |
0.0 |
M |
|
| 8/28/2020 |
8:00 AM |
0.56 |
0.0 |
M |
0.0 |
M |
Intense afternoon thunderstorm with high winds mid afternoon. Some localized tree damage with several large leads noted in limited areas near the park. At morning obs, overcast and 66. |
| 8/29/2020 |
9:00 AM |
0.03 |
0.0 |
M |
0.0 |
M |
|
| 8/30/2020 |
8:00 AM |
0.04 |
0.0 |
M |
0.0 |
M |
|
| 8/31/2020 |
8:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 72/51. Mostly cloudy Sunday morning yielded to sunshine mixed with Cu clouds in the midday hour to late in the day. Winds light NW-N. Overnight, clear moonlit skies and strong radiational cooling yielded coolest temps since June. At morning obs time, clear and 54. |
| 9/1/2020 |
8:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 75/65. Sunny and low humidity start to the recording period...Monday. A deck of high and mid patchy cloud visible to the south. As day progressed, dewpoints climbed back into the lower 60s, after a morning value near 49. Hazier by end of day with patchy Ac and Sc, giving us a mainly cloudy night. At morning obs, partly cloudy and 66. |
| 9/2/2020 |
8:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 76/69. A mostly cloudy and more humid day. Some breaks allowed for limited sun at times. Overnight, mostly cloudy and humid. Light to no breezes. Morning obs time, mostly cloudy (mid level) and 70. |
| 9/3/2020 |
8:00 AM |
0.03 |
0.0 |
M |
0.0 |
M |
Temp range 81/60. |
| 9/4/2020 |
8:00 AM |
0.08 |
0.0 |
M |
0.0 |
M |
Temp range 77/58. Cold fropa just after midnight accompanied by showers. Clearing followed, as a cooler polar air mass settles into region. Dewpoints dropped from near 60 into the lower-mid 40s by obs time. No wind yet at obs time, but expected to pick up shortly. |
| 9/5/2020 |
8:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 72/54. |
| 9/6/2020 |
8:00 AM |
0.03 |
0.0 |
M |
0.0 |
M |
Temp range 67/53. |
| 9/7/2020 |
8:30 AM |
0.03 |
0.0 |
M |
0.0 |
M |
Temp range 70/56. |
| 9/8/2020 |
8:00 AM |
T |
0.0 |
M |
0.0 |
M |
Temp range 73/64. |
| 9/9/2020 |
8:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 77/56. |
| 9/10/2020 |
8:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
|
| 9/11/2020 |
8:00 AM |
0.06 |
0.0 |
M |
0.0 |
M |
Temp range 72/55. |
| 9/12/2020 |
8:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range: 59/43. Low Sc deck most of day. Starting at 16:45, binovc observed, as drier air aloft arrived from the north. Clearing rapidly arrived by 17:30...yielding to a clear and cold night. Heat needed for first time since June. Some locations south of I-90 dropped into the upper 30s for minimums. At morning obs, broken high cirroform clouds and 45. |
| 9/13/2020 |
9:15 AM |
0.06 |
0.0 |
M |
0.0 |
M |
Temp range 70/65. |
| 9/14/2020 |
9:15 AM |
0.10 |
0.0 |
M |
0.0 |
M |
Temp range 71/57. |
| 9/15/2020 |
9:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 63/41. High altitude smoke arrived during the midday hours into sundown. Overnight, clear but hazy aloft. Coolest night of the season. Areas south of station, south of I-90, dropped into the upper 30s. |
| 9/16/2020 |
8:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
|
| 9/17/2020 |
8:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
|
| 9/18/2020 |
6:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 65/48. |
| 9/19/2020 |
7:45 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 59/37. Intervals of sun and cloud on Friday. Smoke no longer visible at high altitude, as this air mass is sourced from central and eastern Canada. Light N breezes. Overnight, skies cleared out. Radiational cooling allowed temps to drop deep into the 30s. Some stations south of this station as low as 33. Frost visible on rooftops. At obs time, sunny and 38. |
| 9/20/2020 |
8:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 55/37. |
| 9/21/2020 |
8:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 58/35. |
| 9/22/2020 |
8:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 64/38. |
| 9/23/2020 |
8:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 65/53. |
| 9/24/2020 |
6:45 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Temp range 75/54. |
| 9/25/2020 |
8:00 AM |
T |
0.0 |
M |
0.0 |
M |
|
| 9/26/2020 |
8:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
|
| 9/27/2020 |
8:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
|
| 9/28/2020 |
8:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
|
| 9/29/2020 |
9:00 AM |
0.28 |
0.0 |
M |
0.0 |
M |
Temp range 81/56. |
| 9/30/2020 |
9:00 AM |
1.07 |
0.0 |
M |
0.0 |
M |
Temp range 60/51. Not an all day event. Most of the day was rain free after 10am. But thick clouds and chilly air and little wind remained. Second round of rain arrived at 20:25, and shut down by 04:30. At obs time, overcast and 52. |