| Observation Date |
Observation Time |
Precipitation |
Snowfall |
Snowfall SWE |
Snow Depth |
Snow SWE |
Notes |
| 10/3/2011 |
8:45 AM |
0.02 |
M |
M |
M |
M |
Storm total with cold upper vortex after cold front passage 0.42" which is among lowest in the area. |
| 10/4/2011 |
9:00 AM |
0.04 |
M |
M |
M |
M |
|
| 10/5/2011 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 10/6/2011 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 10/7/2011 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 10/8/2011 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 10/9/2011 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 10/22/2011 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 10/23/2011 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 10/24/2011 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 10/25/2011 |
9:00 AM |
0.03 |
M |
M |
M |
M |
Everything still damp this morning although rain fell only briefly sometime around 8pm, as all was dry when I went to 7pm meeting and rain had ended when meeting was over before 9pm |
| 10/26/2011 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 10/27/2011 |
9:30 AM |
0.27 |
M |
M |
M |
M |
0.19" fell during afternoon as surprise, beginning at time when NWS had no PoP (they later updated to include showers with up to 0.10" possible). Light rain at obs time began shortly after 9am but ground (street etc.) was already wet, so must have been other light rain or drizzle overnight or earlier morning. |
| 10/28/2011 |
9:15 AM |
0.11 |
M |
M |
M |
M |
|
| 10/31/2011 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 11/1/2011 |
9:00 AM |
0.02 |
M |
M |
M |
M |
Overnight light rain, feels like spring after the last few days! |
| 11/2/2011 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 11/3/2011 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 11/4/2011 |
9:00 AM |
T |
M |
M |
M |
M |
Bottom of inner cylinder barely wet, very little water but there is some. |
| 11/5/2011 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 11/6/2011 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 11/7/2011 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 11/8/2011 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 11/9/2011 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 11/10/2011 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
Funnel had small water drops on it and cars too but grass and road was dry as was the inner tube in the gauge. It appears water source was dew and we had early morning fog. |
| 11/11/2011 |
1:00 PM |
0.09 |
M |
M |
M |
M |
light rain fell during the day Thursday, ending by evening |
| 11/12/2011 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 11/13/2011 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 11/14/2011 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 11/15/2011 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 11/16/2011 |
9:30 AM |
0.15 |
M |
M |
M |
M |
Light rain at time of obs and narrow willow oak leaves on funnel but not obstructing opening |
| 11/17/2011 |
9:30 AM |
0.27 |
M |
M |
M |
M |
Light rain and drizzle ended a short while before obs time. Also, there was a time during the evening when rain and drizzle ended before resuming again overnight. |
| 11/18/2011 |
9:00 AM |
0.02 |
M |
M |
M |
M |
Apparently, more light rain fell in the late morning before afternoon clearing |
| 11/19/2011 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 11/20/2011 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 11/21/2011 |
9:00 AM |
0.17 |
M |
M |
M |
M |
Light rain began around dusk and continued through overnight with some interruptions. No rain and no fog at obs time, partly sunny, mild and humid like a late spring day! |
| 11/22/2011 |
9:30 AM |
0.10 |
M |
M |
M |
M |
Mist and light drizzle at time of obs. A lot of water dripping from trees. Since leaves have almost all fallen, apparently the dripping is from condensation collecting and running off rather than from rain storage in the canopy. |
| 11/23/2011 |
8:00 AM |
0.83 |
M |
M |
M |
M |
Rain ended by obs time, very warm and humid with no fog |
| 11/24/2011 |
11:45 AM |
0.02 |
M |
M |
M |
M |
Brief period of light rain approx 9:45am as cold front came through. Warm and humid in 60s before, blustery with falling temperatures after. |
| 11/25/2011 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 11/26/2011 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 11/27/2011 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 11/28/2011 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 11/29/2011 |
7:45 AM |
0.03 |
M |
M |
M |
M |
Light rain overnight, mostly sunny and extremely warm now |
| 11/30/2011 |
9:00 AM |
0.48 |
M |
M |
M |
M |
Wide rain band arrived late morning, gone by mid to late afternoon. |
| 12/1/2011 |
8:30 AM |
0.01 |
M |
M |
M |
M |
Gauge had water, mid-day dense stratocu must have precipitated though did not notice it. No dew on grass, newspapers, or cars, so doubt the water is from dew. |
| 12/2/2011 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 12/3/2011 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 12/4/2011 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 12/5/2011 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 12/6/2011 |
8:15 AM |
0.06 |
M |
M |
M |
M |
Light rain overnight or morning. No rain at obs time but very light rain shortly thereafter. |
| 12/7/2011 |
9:30 AM |
1.25 |
M |
M |
M |
M |
Overnight/morning disturbance has almost finished passing through, still light rain falling. |
| 12/8/2011 |
9:30 AM |
1.69 |
M |
M |
0.0 |
M |
Storm total 2.94". After morning rain ended yesterday, rain resumed in mid-afternoon and became intermittently somewhat heavy through the evening with gusty winds after 7pm, before ending before or around midnight. I did not see snow mixing in but was not watching carefully, definitely there was still rain falling near the end and if any snow did fall, it melted without whitening the ground or car roofs. I did not hear thunder or see lightning (which may have accompanied the cold frontal band south of DC during the evening; the morphed diffused northern end of that band moved northeast across the southern and eastern DC suburbs) |
| 12/9/2011 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 12/10/2011 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 12/11/2011 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 12/12/2011 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 12/13/2011 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 12/14/2011 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 12/15/2011 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 12/16/2011 |
9:30 AM |
0.04 |
M |
M |
M |
M |
Light rain during mid-late afternoon |
| 12/17/2011 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 12/18/2011 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 12/19/2011 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 12/20/2011 |
9:00 AM |
0.01 |
M |
M |
M |
M |
Don't know when rain fell but water in gauge definitely not from dew, as dewpoints were low while temperatures stayed up all night |
| 12/21/2011 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
No rain yesterday and overnight, everything dry, but very light rain began 10am this morning (after obs time) |
| 12/22/2011 |
9:30 AM |
0.10 |
M |
M |
M |
M |
Light rain during middle of day |
| 12/23/2011 |
9:30 AM |
0.80 |
M |
M |
M |
M |
Rain began in evening, continued overnight. This morning is bright and sunny. |
| 12/24/2011 |
11:00 AM |
0.02 |
M |
M |
M |
M |
Water in gauge, all is dry, all was dry yesterday, do not know when it fell but others have reported overnight or early morning showers |
| 12/25/2011 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 12/26/2011 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 12/27/2011 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
rain began around 9:30am this morning, stopped by 10:00am and restarted at 10:50am, looks like it will continue for the day. This will all go in tomorrow's total. No rain at all before 9:30. |
| 12/28/2011 |
9:30 AM |
0.64 |
M |
M |
M |
M |
Light rain 9:30-10:00 am and then continuous period of rain began at 10:50am, ended roughly around 5pm with spectacular pink sunset while still raining and overcast overhead. |
| 12/29/2011 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
2011 total 50.02" of which 21.78" came during the two months from Aug 2 to Oct 2. This 2-month total is very close to the 100-year return estimate for the area (http://hdsc.nws.noaa.gov/hdsc/pfds/pfds_map_cont.html?bkmrk=dc). There were two typical wet periods: 4.55" in 3 weeks Dec 7-28 and 3.60" in 12 days Feb 28-Mar 11. The remaining almost-9-months totaled only 20.09". Thus, despite a high annual total, overall it was a very dry year aside from two typical wet periods and a two-month period of extraordinarily heavy rain. |
| 12/30/2011 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
Did not see any snowflakes, guess I was just south/east of the area where they reached the ground or didn't look at the right moment. |
| 12/31/2011 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 1/1/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 1/2/2012 |
12:00 PM |
0.02 |
M |
M |
M |
M |
Brief light shower at home around 3pm and probably more - saw showers at Tidal Basin in DC beginning around 4:30pm. |
| 1/3/2012 |
10:30 AM |
0.00 |
0.0 |
M |
M |
M |
Was out during afternoon, saw snow showers (flakes in the air, no coating on grass or road) on Rt 32 northwest of Columbia and on I-70 west of 32. No evidence of any snow at home. |
| 1/4/2012 |
11:00 AM |
T |
T |
M |
0.0 |
0.00 |
Snow flurries. Nothing like the brief heavy snow showers seen in other parts of the area. |
| 1/5/2012 |
9:30 AM |
T |
T |
M |
0.0 |
M |
snow roughly around 9:30pm, enough to briefly stick to and partially cover car roofs, but none on grass or roads or any other surface. |
| 1/6/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 1/7/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 1/8/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 1/9/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 1/10/2012 |
9:30 AM |
0.09 |
0.5 |
M |
0.0 |
M |
Snow began lightly around 1pm. Returned home 6:30pm to a half inch covering all grassy surfaces and cars, nothing on pavement - took measurement against smooth cold metal surface (yard lights lining front walk) as the gap between the ground and the bottom of snow caught in the grass made it too difficult to get a reasonable measurement of just the snow layer in the grass. Actual snow fall probably was higher, as there certain was some melting. By morning, all had melted, bare ground. |
| 1/11/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 1/12/2012 |
9:00 AM |
0.80 |
M |
M |
M |
M |
Puddles standing in yard, appears not to be draining. Cracked acorns on hail pad and hail pad appears to be getting a little torn up, apparently by squirrels - was going to need a new one by spring anyway. |
| 1/13/2012 |
9:30 AM |
0.04 |
M |
M |
M |
M |
Sprinkles evening around 7pm, overnight rain |
| 1/14/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 1/15/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 1/16/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 1/17/2012 |
9:30 AM |
0.24 |
M |
M |
M |
M |
Morning rain. To compare against stations with earlier readings, need tomorrow's 2-day total. |
| 1/18/2012 |
9:30 AM |
0.03 |
M |
M |
M |
M |
Sun came out yesterday afternoon. Due to morning rain reported in my amount yesterday but which fell after the time which many others report, use 2-day total to compare against other stations. |
| 1/19/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 1/20/2012 |
9:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
Did not observe any snow flurries, apparently all sublimated while falling. |
| 1/21/2012 |
12:00 PM |
0.29 |
2.0 |
0.29 |
1.5 |
0.25 |
Snow was falling light to brief periods of moderate at 1:00 am and changed to mostly sleet after 2am at which time I had 1.5 inches on surfaces such as my hail pad and trash carts (plastic, not next to the house) and 2 inches in the grass because of an empty layer below the accumulation (it got caught in the grass and did not reach the bottom of the grass). At that point the covering was all snow. In the morning, the sleet accumulated ice granules with a crust layer of somewhat less than 1/4 inch, around 3/16 inch (measured, rather uniform). The crust compressed the snow under it so the total depth was 1.5 inches rather uniform, some places only around 1". The gauge had a little bit of glazing, so the precip must have changed to freezing rain before ending. No precip falling at obs time nor later as I cleaned my walk and driveway. |
| 1/22/2012 |
11:30 AM |
0.00 |
0.0 |
M |
1.0 |
M |
Gauge is dry and have not seen any flurries or freezing drizzle since yesterday's obs. Snow is melting from underneath while ice crust appears little changed. |
| 1/23/2012 |
9:15 AM |
T |
M |
M |
0.5 |
M |
very light rain began a little before 9am, no icing/glazing on any surfaces. Appears to have been completely dry before 8:30am. Icy crust still covers almost all of the ground but it is very thin and most of the snow underneath it is gone. |
| 1/24/2012 |
8:30 AM |
0.04 |
M |
M |
0.0 |
M |
Light rain. Snow/ice on ground all melted. |
| 1/25/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 1/26/2012 |
9:30 AM |
0.01 |
M |
M |
M |
M |
Apparently some light rain overnight |
| 1/27/2012 |
9:30 AM |
0.35 |
M |
M |
M |
M |
Heavy shower with a few flickers of lightning and rumbles of thunder ended just before obs time, still a few drops of rain falling. Lots of puddles in yards despite only 0.35", seems like excessive runoff. |
| 1/28/2012 |
12:00 PM |
0.01 |
M |
M |
M |
M |
.01" additional fell from yesterday morning's shower after my obs, so the total rain yesterday morning was 0.36" |
| 1/29/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 2/2/2012 |
9:30 AM |
0.12 |
M |
M |
M |
M |
Light rain overnight/early morning, stopped, resumed with light rain falling at obs time. |
| 2/3/2012 |
9:30 AM |
0.02 |
M |
M |
M |
M |
Light rain yesterday morning ended after yesterday's obs time, dropping another .02" for a total of .14", all of which fell Wednesday night overnight to Thursday morning. (today is Friday) |
| 2/4/2012 |
11:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 2/5/2012 |
12:00 PM |
0.11 |
M |
M |
M |
M |
Looked for change to snow several times in late afternoon and early evening, did not see any flakes when I was looking. If had any snow, it melted upon hitting the ground and even car roofs. |
| 2/6/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 2/7/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 2/8/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 2/9/2012 |
8:30 AM |
0.10 |
M |
M |
0.0 |
M |
In Baltimore area, saw all snow, no rain during afternoon. Upon returning home, saw only rain, no snow. I do not know if any snowflakes mixed in at the beginning and may have missed some after dark, but definitely there was no snow on any surfaces at any of the many times I looked. Thin crust of ice on water in gauge as temperature fell below freezing overnight after precipitation ended. |
| 2/10/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 2/11/2012 |
2:00 PM |
0.14 |
M |
M |
0.0 |
M |
bare ground |
| 2/12/2012 |
1:00 PM |
0.02 |
M |
M |
T |
M |
around 3:15pm or 3:30pm, snow squall came through along arctic front with briefly heavy wind-blown snow which melted on the warm ground. Without a chilled snowboard, I cannot determine the snowfall. The snow quickly ended and then additional snow fell overnight, completely covering the ground with a dusting. Gauge may have missed some of the blowing snow, as some may have blown around the gauge. The sun warmed the gauge and all of the snow in it had melted by mid-day today when I finally went to check on it. |
| 2/13/2012 |
9:00 AM |
0.00 |
0.0 |
M |
T |
M |
ground mostly bare but snow remains on ground in areas shadowed all day long including adjacent to north side of the house |
| 2/14/2012 |
9:00 AM |
0.00 |
0.0 |
M |
0.0 |
M |
|
| 2/15/2012 |
9:30 AM |
T |
M |
M |
0.0 |
M |
|
| 2/16/2012 |
9:15 AM |
T |
M |
M |
0.0 |
M |
Not raining at obs time. |
| 2/17/2012 |
9:30 AM |
0.15 |
M |
M |
M |
M |
|
| 2/18/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 2/19/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 2/20/2012 |
9:30 AM |
0.01 |
M |
M |
M |
M |
|
| 2/21/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 2/22/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 2/23/2012 |
9:00 AM |
0.01 |
M |
M |
M |
M |
Apparently, light rain overnight. The part of the walk in front of the house still in the shadow at obs time remains damp while the part exposed to the sun is dry and street is dry. |
| 2/24/2012 |
8:50 AM |
0.01 |
M |
M |
M |
M |
Sprinkles at obs time, light showers overnight |
| 2/25/2012 |
12:30 PM |
0.31 |
M |
M |
M |
M |
Rain began before 1:50pm as heavy storms passed to the south. I attempted to intercept but made a bad decision and got stuck in traffic (where traffic cameras before I left showed traffic not heavy and certainly not slowing or jammed) while storms passed over lower southern Maryland. I managed to get to Richmond exactly in time to see ice cubes falling without any rain, then hit the wall of water. The front plus outflow boundary sagged all the way down to just north of Richmond, with temperatures (car thermometer) in the upper 50s until slightly north of Richmond, then mid-60s on north side of Richmond with nice robust-looking bunches of small updraft bases supporting hefty towers, and then up to 75 just before I encountered the hailstorm. Max hail size I estimate around 1" which is smaller than reported at nearby RIC airport and car has no hail damage at all. I did not see a lot of lightning. Updrafts were all in front of the storm and along the leading edge. |
| 2/26/2012 |
9:00 AM |
T |
M |
M |
M |
M |
A little water in gauge, air too dry for dew/frost, so must have been a flurry or light shower. |
| 2/27/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 2/28/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 2/29/2012 |
9:30 AM |
0.27 |
M |
M |
M |
M |
|
| 3/1/2012 |
9:30 AM |
1.28 |
M |
M |
M |
M |
Storm total 1.55 beginning yesterday morning. One extremely close flash of lightning around midnight with a gigantic explosion-like cannon of thunder followed by a long period of thunderous reverberation and rolling thunder. Did not see any other lightning or hear any other thunder. |
| 3/2/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 3/3/2012 |
9:30 AM |
0.90 |
M |
M |
M |
M |
Afternoon/eve light rain. Thundershowers began shortly before 11pm, with a series of modest cells training over, none very heavy. New hail pad has no marks and I did not see any hail falling. |
| 3/4/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 3/5/2012 |
7:30 AM |
0.00 |
0.0 |
M |
M |
M |
Frost |
| 3/6/2012 |
8:00 AM |
T |
M |
M |
M |
M |
Trace of water frozen in bottom of inner cylinder. Was not home when precip fell but was quite a bit of snowshower activity in Gaithersburg. |
| 3/14/2012 |
9:00 AM |
0.01 |
M |
M |
M |
M |
Must have gotten a little from the scattered afternoon showers |
| 3/15/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 3/16/2012 |
9:00 AM |
T |
M |
M |
M |
M |
|
| 3/17/2012 |
7:45 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 3/18/2012 |
2:00 PM |
0.00 |
0.0 |
M |
M |
M |
|
| 3/19/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 3/20/2012 |
7:45 AM |
0.48 |
M |
M |
M |
M |
|
| 3/21/2012 |
8:00 AM |
0.01 |
M |
M |
M |
M |
Wet ground and streets. No precip at obs time but mist an hour later. |
| 3/22/2012 |
8:15 AM |
T |
M |
M |
M |
M |
Mist after obs time yesterday, little bit of water in gauge this morning. |
| 3/23/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 3/24/2012 |
11:30 AM |
0.28 |
M |
M |
M |
M |
Very light rain falling at obs time. Heard rain overnight and may have seen a flash of lightning (may have been more I missed while sleeping). |
| 3/25/2012 |
12:30 PM |
0.17 |
M |
M |
M |
M |
everything dried off by obs time, still overcast and high relative humidity |
| 3/26/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 3/27/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 3/28/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 3/29/2012 |
9:00 AM |
0.02 |
M |
M |
M |
M |
Showers/thundershowers Wed afternoon... saw 1 flash of lightning in Gaithersburg |
| 3/30/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 3/31/2012 |
12:00 PM |
0.00 |
0.0 |
M |
M |
M |
gauge dry but has grass seeds stuck on the bottom and green pollen covers cars and other exposed surfaces - at least 3 weeks before usual pollen season begins |
| 4/1/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 4/2/2012 |
8:45 AM |
0.12 |
M |
M |
M |
M |
Late evening and overnight light rain showers |
| 4/3/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 4/4/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 4/5/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 4/6/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 4/7/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 4/8/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 4/9/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 4/10/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 4/11/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 4/12/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 4/13/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 4/14/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 4/15/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 4/16/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 4/17/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 4/18/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 4/19/2012 |
9:00 AM |
0.19 |
M |
M |
M |
M |
Rain started shortly after 8am |
| 4/20/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 4/21/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 4/22/2012 |
11:15 AM |
0.20 |
M |
M |
M |
M |
Light rain at obs time. Most of the rain fell yesterday evening approximately 7-8pm. |
| 4/23/2012 |
8:00 AM |
1.08 |
M |
M |
M |
M |
|
| 4/24/2012 |
9:00 AM |
0.04 |
M |
M |
M |
M |
|
| 4/25/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 4/26/2012 |
8:30 AM |
0.05 |
M |
M |
M |
M |
|
| 4/27/2012 |
9:00 AM |
0.01 |
M |
M |
M |
M |
|
| 4/28/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 4/29/2012 |
3:00 PM |
0.21 |
M |
M |
M |
M |
Steady light rain began in evening after some mid-day sprinkles. |
| 4/30/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 5/1/2012 |
9:00 AM |
0.14 |
M |
M |
M |
M |
Morning showers today |
| 5/2/2012 |
8:05 AM |
0.01 |
M |
M |
M |
M |
No rain falling at obs time. |
| 5/3/2012 |
9:00 AM |
T |
M |
M |
M |
M |
sprinkles around 8pm |
| 5/4/2012 |
7:45 AM |
0.08 |
M |
M |
M |
M |
Thundershower mostly to the north and northeast with thunder audible before 11pm and some lightning in the vicinity and a brief moderate shower beginning with very large drops. Light fog still at obs time and ground looks dark and muddy but is not soft like mud. |
| 5/5/2012 |
9:30 AM |
T |
M |
M |
M |
M |
mid-day thundershower passed to the south |
| 5/6/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 5/7/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 5/8/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 5/9/2012 |
9:00 AM |
0.11 |
M |
M |
M |
M |
rain Tuesday during the day |
| 5/10/2012 |
9:00 AM |
0.49 |
M |
M |
M |
M |
|
| 5/11/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 5/12/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 5/13/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 5/14/2012 |
8:45 AM |
0.10 |
M |
M |
M |
M |
Light rain at obs time |
| 5/15/2012 |
9:00 AM |
0.74 |
M |
M |
M |
M |
rain during morning, ended before obs time |
| 5/16/2012 |
9:00 AM |
0.06 |
M |
M |
M |
M |
anvil overhead, thunderstorms with towers illuminated by lightning at dusk distant south from southwest to southeast. A few rumbles of thunder apparently from some lightning in the nearby anvil, but not much - most lightning in the distant towers. |
| 5/17/2012 |
8:00 AM |
0.02 |
M |
M |
M |
M |
Yesterday morning I took my observation and emptied the gauge. Around 8pm, I was in the yard and decided to check the gauge, it had .02" in it. But I was sure there had been no rain during the day, so I wasn't sure what to do or where the water came from. But an automated home weather station in my neighborhood which reports on Mesowest indicates rain over that time period. Maybe we both had canopy drip - I have no canopy directly over my gauge but there is canopy within a few meters and some may have blown while falling. Or maybe there really was a shower. |
| 5/18/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 5/19/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 5/20/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 5/21/2012 |
9:00 AM |
0.18 |
M |
M |
M |
M |
Rain began shortly before midnight and light rain again at obs time. |
| 5/22/2012 |
9:00 AM |
0.04 |
M |
M |
M |
M |
|
| 5/23/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
Missed - nice towers around but nothing fell here. Gauge had a little dew collected and grass covered with heavy dew at obs time. |
| 5/24/2012 |
8:30 AM |
0.00 |
0.0 |
M |
M |
M |
Missed again. Thunderstorm with roll cloud and some CG lightning over Gaithersburg during afternoon, then rain on west half of beltway up to around New Hampshire Ave, and pavement wet even east of there but probably from cars carrying water on tire treads.
More lightning after dark distant west |
| 5/25/2012 |
7:45 AM |
T |
M |
M |
M |
M |
Happened to be outside around 8:30pm when just a few drops of rain fell, otherwise would not have known. |
| 5/26/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 5/27/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 5/28/2012 |
12:00 PM |
0.09 |
M |
M |
M |
M |
gust front came through around 8:30pm (approximate, maybe a little later) with gusts to around 40 MPH, followed by a very modest thundershower with a few long horizontal lightning bolts from northwest to west. |
| 5/29/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 5/30/2012 |
9:00 AM |
0.42 |
M |
M |
M |
M |
Storms formed behind (over top of) surface gust front. Gust front reached parts of Gaithersburg a bit after 6:30pm and storms with moderate to occasionally briefly heavy rain reached Silver Spring after 8pm and continued thereafter in College Park, on my several-stop journey home. Lightning appeared to be mostly in-cloud and was not frequent but there were quite a few flashes even continuing in very light rain behind the storm for several hours. |
| 5/31/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 6/1/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 6/2/2012 |
12:00 PM |
2.04 |
M |
M |
M |
M |
1.78 fell by 8:25pm, mostly from around 5:30 pm to around 7 or 7:30pm. Most of the rain fell from a cell which tracked from around Fort Belvoir across National Airport and Camp Springs area and continued northeast through Greenbelt and College Park. Second was a long-lived cell from southwest Virginia that became a bow echo around Mannasas, then weakened and redeveloped over northwest DC and tracked just to the west and continued northeast up I-95 and produced the tornado at BWI. The third was development along a visually apparent boundary stretched diagonally across the beltway and moved from southwest to northeast along the boundary. Low-level shear was sharp and visible with surface winds from E/SE, scud moving from southeast, updraft bases of small towers aligned north-south and moving from the south, and storms moving from the southwest. |
| 6/3/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 6/4/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 6/5/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 6/6/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 6/7/2012 |
8:45 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 6/8/2012 |
8:00 AM |
0.01 |
M |
M |
M |
M |
May have been afternoon showers while at work, experienced sprinkles around 8pm. In Gaithersburg in the afternoon, had a small thunderstorm with a little mammatus on the rear part of the anvil. |
| 6/9/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 6/10/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 6/11/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 6/12/2012 |
6:50 AM |
0.14 |
M |
M |
M |
M |
Sprinkles during evening, overnight rain, not raining at obs time. |
| 6/13/2012 |
7:30 AM |
0.20 |
M |
M |
M |
M |
Ground and grass densely covered with dew, rain fell yesterday morning through afternoon. |
| 6/14/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 6/15/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 6/16/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 6/17/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 6/18/2012 |
9:15 AM |
0.07 |
M |
M |
M |
M |
Light rain falling at obs time |
| 6/19/2012 |
7:30 AM |
0.02 |
M |
M |
M |
M |
Light rain yesterday morning extended past obs time. Total for the day was .09" with .07" before yesterday's obs time and .02" after (so in today's reading) |
| 6/20/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 6/21/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 6/22/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 6/23/2012 |
9:30 AM |
0.55 |
M |
M |
M |
M |
Intense thunderstorm arrive around 7:40pm with a shelf cloud and low-hanging black updraft tower moving from the WNW, mammatus overhanging in front of it, and frequent lightning sparking above the shelf cloud. Rain curtains with blowing sheets of rain were visible nearby to the south, along with frequent curly ground strikes, then the rain and gusty wind arrived with the storm core - but none was as strong as what passed a couple miles (or less) to the south. |
| 6/24/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 6/25/2012 |
8:00 AM |
0.02 |
M |
M |
M |
M |
Had sprinkles around 7 or 8pm from anvil overhead from distant storm that never reached me, and saw nearby updraft bases for developing storm that passed to the east. Guessing the water in the gauge must be from a light overnight shower - there were some overnight showers and thundershowers and the sprinkles I felt would not have come to .02" as they did not even wet the ground, just a few isolated drops. |
| 6/26/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 6/27/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 6/28/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 6/29/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 6/30/2012 |
9:00 AM |
0.76 |
M |
M |
M |
M |
Undercatch due to wind, although my gauge exactly matches the amount reported by the automated home weather station a block away. Evening severe storm came after 10:30pm first with a light shower with very large raindrops widely spaced ahead of the gust front, then incessant lightning in different colors - bluish, greenish, yellowish, pink, white flickering behind different parts of the complex cloud structure with a laminar striated shelf cloud barely visible (lightning behind it illuminated other parts leaving the best features in the shadows) and smooth watery base behind it. Wind started gusting as the shelf cloud passed over and gusted for quite a while probably over around 60-70 mph, fortunately no damage on my block despite many downed branches and pieces of branches. Power went off and on several times but stayed on afterwards but nearby areas lost power. Winds were initially persistently strong with impressive gusts, then as rain continued, it surged with gusts while the mean wind decreased to around 15-20 mph. Most of the lightning was in cloud and many of the ground strikes were toward the rear of the storm, and anvil rain and lightning continued for a long while later. The derecho was rather uniform across a broad area - the swath of high winds was unusually wide as well as intense for this part of the country - almost a synoptic scale swath, not on the scale of a cell or cluster of cells. |
| 7/1/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 7/2/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
Thunderstorms after midnight with sharp lightning bolts extending out of the towers to the north. Storms passed nearby to the north. Did not notice any rain while watching and gauge and ground were dry. |
| 7/3/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 7/4/2012 |
12:00 PM |
0.04 |
M |
M |
M |
M |
Light rain in the evening from dissipating thundershowers moving from NW to SE. No thunder here but distant lightning to the south as the surviving storm passed from Dulles southeast to southern Prince George's county. |
| 7/5/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 7/6/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 7/7/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 7/8/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 7/9/2012 |
7:30 AM |
0.13 |
M |
M |
M |
M |
Afternoon storms passed too far away to see but produced an extremely thick anvil which darkened the sky and produced occasional lightning. A thunderstorm formed after midnight to the southeast, producing frequent lightning but no rain here. Overnight rain fell. |
| 7/10/2012 |
8:00 AM |
0.04 |
M |
M |
M |
M |
Light rain yesterday morning after obs time |
| 7/11/2012 |
8:00 AM |
0.23 |
M |
M |
M |
M |
Evening showers/thundershowers - found 0.23 in gauge after midnight. Found another .01 in the morning in the presence of heavy dew, think there was no overnight rain so not including that in the total. |
| 7/12/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 7/13/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 7/14/2012 |
9:00 AM |
0.39 |
M |
M |
M |
M |
Brief torrential downpour around 7:30am this morning. I did not notice any lightning or thunder. |
| 7/15/2012 |
9:30 AM |
0.01 |
M |
M |
M |
M |
Updraft bases passed overhead during the day but as far as I am aware, none of those towers developed into showers. Sprinkles passed over the area in the evening/overnight from remnants of convection to the south but I did not notice any rain - likely fell after dark from that. |
| 7/16/2012 |
8:00 AM |
0.06 |
M |
M |
M |
M |
Few drops of rain around 6pm, minor thundershower around 7pm behind gust front which arrived from south of the metro area with very little gustiness but a fine line on radar. (Gust front originated with much more vigorous storms which collapsed - what I got was a new development which rose up over DC) |
| 7/17/2012 |
8:30 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 7/18/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 7/19/2012 |
9:00 AM |
0.27 |
M |
M |
M |
M |
I watched a tower build up suddenly southwest of Rockville near Potomac, glaciate on the east end while continuing to billow up on the west end, and produced a heavy rain shaft which then became thicker and completely dark and opaque and started producing lightning bolts. A little while later around or shortly before 4pm, the gust front from the main batch of storms blew in from the north past Gaithersburg (way out ahead of the storms), producing new fresh updraft towers. Eventually this merged with the outflow from the Potomac/-south of Rockville cell which produced backbuilding a little bit. Lightning bolts were sparking out of the rain-free updraft bases in the backbuilding (west) areas while heavy rain was falling toward the east (apparently with a lot of lightning there too but that part was obscured from my view) |
| 7/20/2012 |
8:00 AM |
0.95 |
M |
M |
M |
M |
Big lightning storm came at 10pm with spectacular display of continuous illumination and vivid bolts in the towers. The lightning was more frequent than one per second plus multistroke, mostly in cloud though plenty of ground strikes too. Heavy rain but not exceptional came after the beginning of the lightning, behind the updraft base. The gust front was weak - seems it may have passed through much earlier and only had weak additional focus at the edge of the storm. Earlier during the late afternoon, a big storm over Baltimore dropped a gust front south through my area and towers developed along or behind it before dusk, but I saw no lightning from those and the rain from those stayed to my east slightly. At around 12:30am, more moderate showers without lightning passed over which formed to the southwest of the edge of the complex that moved through after 10pm and tracked northeastward (the main complex tracked southeastward, so the shower band swept over areas the complex had also gone over). |
| 7/21/2012 |
10:45 AM |
0.80 |
M |
M |
M |
M |
Rain overnight into the morning, rather heavy around 8am, still very light rain continuing now. No lightning or thunder here. |
| 7/22/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
Note late obs time yesterday - much of the rain reported yesterday fell after the obs time at many other sites, so they reported it in today's report |
| 7/23/2012 |
8:00 AM |
0.01 |
M |
M |
M |
M |
Light shower mid-day around noon |
| 7/24/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 7/25/2012 |
7:30 AM |
0.01 |
M |
M |
M |
M |
rain from dissipating convection drifting over during the afternoon/evening
From office in Gaithersburg, I saw 3 cloud to ground strikes nearby and rain shaft to northwest behind updraft base but storm fell apart so rapidly there was nothing left by the time it arrived with a modest gust front. |
| 7/26/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 7/27/2012 |
9:00 AM |
0.04 |
M |
M |
M |
M |
Lightning to the north late evening after dark, no storms here. Not sure if we got a shower shortly after that or if rain was from overnight showers from dissipated area of convection to the west. |
| 7/28/2012 |
11:00 AM |
T |
M |
M |
M |
M |
Saw/felt a few raindrops around 9pm Fri eve from what appeared to be old anvil remains - looked thick and watery but there were no towers or any signs of updrafts. Gauge was dry. |
| 7/29/2012 |
10:00 AM |
0.00 |
0.0 |
M |
M |
M |
Storms formed by noon in the vicinity-south-east but nothing here. More updraft bases in late afternoon toward evening, then a large storm passed by to the south and produced a great lightning display a few miles to the southeast with a lot of rumbling thunder, but again dry here. The lightning had horizontal sparks under the thick rear anvil and bolts to ground toward the rear of the storm closer toward the core but not a lot of illumination in the towers even at dusk. |
| 7/30/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 7/31/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
May have had sprinkles which occurred under some updraft bases in some places but gauge was dry, cannot tell if they occurred here. |
| 8/1/2012 |
9:00 AM |
0.03 |
M |
M |
M |
M |
Watched storms east and west of office in Gaithersburg but missed the shower that dropped a few hundredths at home. Cell west of Gaithersburg had loosely organized area of updrafts ahead of gust front from cell moving from the south across Potomac - saw the new cell organize and mature while drifting north. |
| 8/2/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
Isolated afternoon and evening storms but none passed over my site. A line of updraft bases with modest towering cu passed over approx 8pm but never matured.
Also saw the unusual morning sight of lines of laminar striated updraft bases and towers well northwest of DC! Visibility was good and some of the tower lines were close to my office, saw on the commute in. |
| 8/3/2012 |
9:00 AM |
0.02 |
M |
M |
M |
M |
Thundershowers in vicinity during afternoon |
| 8/4/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 8/5/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 8/6/2012 |
9:00 AM |
0.19 |
M |
M |
M |
M |
Late afternoon storms, as gust front came through sometime between 4-5pm followed a while later by some moderate showers with a little bit of lightning and thunder. |
| 8/7/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 8/8/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 8/9/2012 |
8:00 AM |
0.00 |
0.0 |
M |
M |
M |
Nothing here. Drove through heavy showers in the morning around 2-3 miles east of I-270 and left work in the evening with towers building overhead, looked like a mountain in the sky from a distance on my way home. |
| 8/10/2012 |
9:15 AM |
0.57 |
M |
M |
M |
M |
.08" from afternoon storms, .49" from overnight and morning rain. Moderate rain with no lightning/thunder 8:30-9am, still light rain at obs time 9:15am.
Evening thunderstorms along and behind numerous outflow boundaries with 3 simultaneously visible from my office. Bay breeze storms formed early near Baltimore and left an outflow boundary - new strong cells formed later there, towers visible from my office in Gaithersburg! Outflow progressed west with another storm forming near/east of Columbia and added to the outflow, boundary moved west all the way eventually across I-270 and south across DC area. New very intense cell formed along it inside the Beltway and intensified along Connecticut Ave corridor near Beltway and moved north building westward, just east of 270, with low-hanging scud clouds, a nice arc-shaped collar and low updraft bases, and an impressive rain shaft with lightning bolts of all varieties sparking out of it. |
| 8/11/2012 |
12:00 PM |
0.09 |
M |
M |
M |
M |
Rain was ending at time of obs yesterday, so most of today's catch was probably from overnight. |
| 8/12/2012 |
10:00 AM |
0.26 |
M |
M |
M |
M |
Afternoon/evening showers, no lightning or thunder here |
| 8/13/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 8/14/2012 |
9:00 AM |
0.09 |
M |
M |
M |
M |
Showers this morning, ended before obs time with partial clearing and some blue sky showing now |
| 8/15/2012 |
9:00 AM |
0.01 |
M |
M |
M |
M |
Hail pad contains one small circular imprint I had not previously noticed but may have occurred some time ago.
Saw the tremendous continuous flickering to the north, lightning of storms over Baltimore after dark. Must have been some little shower overhead but did not notice it - radar showed light activity passing through, explaining the .01" |
| 8/16/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 8/17/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 8/18/2012 |
9:30 AM |
0.37 |
M |
M |
M |
M |
Evening rain continuing into overnight. Did not notice any lightning/thunder. |
| 8/19/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 8/20/2012 |
9:00 AM |
0.03 |
M |
M |
M |
M |
Few drops of rain began around noon, then occassional light rain during the early to mid afternoon. |
| 8/21/2012 |
9:00 AM |
0.34 |
M |
M |
M |
M |
briefly heavy showers evening; saw one flash of lightning while on the Beltway, none observed at home |
| 8/22/2012 |
9:00 AM |
0.05 |
M |
M |
M |
M |
On the edge of evening rainshower, heavier nearby to south and east, and saw rain shaft falling out rear overhang to the south, from near the top of the tower. |
| 8/23/2012 |
9:00 AM |
T |
M |
M |
M |
M |
Drove through torrential downpours on the south end of I-270 through the Rockville area and saw a few flashes of lightning. The road had ponding of water, a lot of water fell very quickly. Further east on the way home, experienced spots of very light rain. At home conditions appeared dry and this morning, gauge did have a little liquid, just a trace. |
| 8/24/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 8/25/2012 |
11:30 AM |
0.00 |
0.0 |
M |
M |
M |
Everything dry including gauge, don't know if missed some sprinkles |
| 8/26/2012 |
8:00 AM |
0.03 |
M |
M |
M |
M |
Occasional light rain mid-late afternoon |
| 8/27/2012 |
9:00 AM |
0.34 |
M |
M |
M |
M |
Afternoon around 2pm few-minute downpour with blowing sheets of rain in easterly winds, followed by a few lightning flashes and a few drum-rolls of loud deep thunder rolling on for a long time. Several other periods of light to briefly moderate showers. |
| 8/28/2012 |
8:30 AM |
0.07 |
M |
M |
M |
M |
Light rain this morning ended before obs time |
| 8/29/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 8/30/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 8/31/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 9/1/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 9/2/2012 |
11:00 AM |
0.17 |
M |
M |
M |
M |
Gigantic thunderstorm with spectacular very frequent lightning passed to the south around 9:30-10pm, had some strikes within a few miles in all directions but 99% of the lightning was to the south. Had brief somewhat heavy downpour. |
| 9/3/2012 |
10:45 AM |
0.08 |
M |
M |
M |
M |
Darkness came early as dark updraft bases covered the evening sky but only had light rain here and only one rumble of thunder |
| 9/4/2012 |
9:00 AM |
0.07 |
M |
M |
M |
M |
Rain overnight or early morning |
| 9/5/2012 |
9:00 AM |
0.02 |
M |
M |
M |
M |
Did not notice any rain but radar shows some light showers passing through the area during mid-day |
| 9/6/2012 |
8:00 AM |
T |
M |
M |
M |
M |
Dry now, trace in gauge. Had row of updraft bases with only modest towers along an east-west line a short ways to the north at dusk, moving southward - one of those might have dropped a few drops after dark. |
| 9/7/2012 |
9:00 AM |
0.09 |
M |
M |
M |
M |
Yesterday morning light rain after obs time, beginning approximately 9am |
| 9/8/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 9/9/2012 |
11:00 AM |
0.78 |
M |
M |
M |
M |
0.76" fell by 7pm (measured), mostly in a few minutes at 4pm when a fast-moving squall line blew through with westerly wind gusts of 50-60 MPH whipping the trees and blowing the rain in waves and sheets racing down the street. A little bit of thunder followed the heavy rain and wind. Light rain continued intermittently until evening. |
| 9/10/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 9/11/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 9/12/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 9/13/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 9/14/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 9/15/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 9/16/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 9/17/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 9/18/2012 |
7:30 AM |
0.35 |
M |
M |
M |
M |
I noticed moderate rain after midnight, not sure when the first rain began. No lightning or thunder. |
| 9/19/2012 |
7:45 AM |
0.60 |
M |
M |
M |
M |
Likely undercatch due to winds during the heaviest rain. Heavy convective band with gusty winds mid-afternoon followed by prolonged light rain. At work in Gaithersburg, the wavy band came through with black bumpy updraft bases that did not have strong winds. Wind gusts followed during the rain as momentum from strong low-level flow was carried downward in the rain and the winds I saw were not all that high, definitely less than the 50 knot severe threshold, although at home I had many small branches down in my yard. I did not observe any lightning or thunder at work and do not know if any occurred at home. |
| 9/20/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 9/21/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 9/22/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 9/23/2012 |
9:00 AM |
0.04 |
M |
M |
M |
M |
Some updraft bases past by and dropped a few drops before around 6pm, modest gust front came through at 6:30 and very brief moderate rainshower at 6:45pm |
| 9/24/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 9/25/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|
| 9/26/2012 |
9:30 AM |
0.10 |
M |
M |
M |
M |
Some late night or early morning rain. Some grass still wet and part of front walk in the shade of the house still wet. |
| 9/27/2012 |
8:00 AM |
0.01 |
M |
M |
M |
M |
Passing light showers approx 11pm |
| 9/28/2012 |
9:00 AM |
0.53 |
M |
M |
M |
M |
9pm thunderstorm with lightning west and south, light to moderate rain by around 10pm, rain continued for at least several hours, never heavy |
| 9/29/2012 |
9:00 AM |
0.02 |
M |
M |
M |
M |
Apparently some afternoon rain showers or light rain while I was at work |
| 9/30/2012 |
9:00 AM |
0.00 |
0.0 |
M |
M |
M |
|