Station Overview Station Location
Station Number MD-MG-20 Latitude 39.1038
Station Name Colesville 1.1 NNW Longitude -77.012605
County Montgomery Elevation (ft) 440



Month 30 Yr Avg by PRISM Total Prcp Sum Days Covered By All Observations Daily Prcp Sum Daily Observation Count Multiday Prcp Sum Days Covered by Multiday Observations Multiday Observation Count Days With Prcp Days With Trace Total Snowfall Days With Snowfall Days With Snow On Ground
Oct 19 3.55 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Nov 19 3.55 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Dec 19 3.30 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Jan 20 3.02 1.61 1 1.61 1 0.00 0 0 1 0 0.0 0 0
Feb 20 2.87 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
March 20 3.84 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
April 20 3.43 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
May 20 4.29 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
June 20 3.97 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
July 20 4.04 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Aug 20 3.22 10.00 28 10.00 28 0.00 0 0 18 2 0.0 0 0
Sept 20 4.07 5.14 30 5.14 30 0.00 0 0 12 1 0.0 0 0
Water Year Totals: 43.15" 16.75" 59 days 16.75" 59 0.00" 0 days 0 31 days 3 days 0.0" 0 days 0 days



Days in Water Year Cell Color Key
        Daily Observation with Prcp         Missing Day
        Multiday Observation         Daily/Multiday Observation Conflict

Day of Year Daily Prcp Multiday Prcp
10/1/2019
10/2/2019
10/3/2019
10/4/2019
10/5/2019
10/6/2019
10/7/2019
10/8/2019
10/9/2019
10/10/2019
10/11/2019
10/12/2019
10/13/2019
10/14/2019
10/15/2019
10/16/2019
10/17/2019
10/18/2019
10/19/2019
10/20/2019
10/21/2019
10/22/2019
10/23/2019
10/24/2019
10/25/2019
10/26/2019
10/27/2019
10/28/2019
10/29/2019
10/30/2019
10/31/2019
11/1/2019
11/2/2019
11/3/2019
11/4/2019
11/5/2019
11/6/2019
11/7/2019
11/8/2019
11/9/2019
11/10/2019
11/11/2019
11/12/2019
11/13/2019
11/14/2019
11/15/2019
11/16/2019
11/17/2019
11/18/2019
11/19/2019
11/20/2019
11/21/2019
11/22/2019
11/23/2019
11/24/2019
11/25/2019
11/26/2019
11/27/2019
11/28/2019
11/29/2019
11/30/2019
12/1/2019
12/2/2019
12/3/2019
12/4/2019
12/5/2019
12/6/2019
12/7/2019
12/8/2019
12/9/2019
12/10/2019
12/11/2019
12/12/2019
12/13/2019
12/14/2019
12/15/2019
12/16/2019
12/17/2019
12/18/2019
12/19/2019
12/20/2019
12/21/2019
12/22/2019
12/23/2019
12/24/2019
12/25/2019
12/26/2019
12/27/2019
12/28/2019
12/29/2019
12/30/2019
12/31/2019
Day of YearDaily PrcpMultiday Prcp
1/1/2020
1/2/2020
1/3/2020
1/4/2020
1/5/2020
1/6/2020
1/7/2020
1/8/2020
1/9/2020
1/10/2020
1/11/2020
1/12/2020
1/13/2020
1/14/2020
1/15/2020
1/16/2020
1/17/2020
1/18/2020
1/19/2020
1/20/2020
1/21/2020
1/22/2020
1/23/2020
1/24/2020
1/25/2020 1.61
1/26/2020
1/27/2020
1/28/2020
1/29/2020
1/30/2020
1/31/2020
2/1/2020
2/2/2020
2/3/2020
2/4/2020
2/5/2020
2/6/2020
2/7/2020
2/8/2020
2/9/2020
2/10/2020
2/11/2020
2/12/2020
2/13/2020
2/14/2020
2/15/2020
2/16/2020
2/17/2020
2/18/2020
2/19/2020
2/20/2020
2/21/2020
2/22/2020
2/23/2020
2/24/2020
2/25/2020
2/26/2020
2/27/2020
2/28/2020
2/29/2020
3/1/2020
3/2/2020
3/3/2020
3/4/2020
3/5/2020
3/6/2020
3/7/2020
3/8/2020
3/9/2020
3/10/2020
3/11/2020
3/12/2020
3/13/2020
3/14/2020
3/15/2020
3/16/2020
3/17/2020
3/18/2020
3/19/2020
3/20/2020
3/21/2020
3/22/2020
3/23/2020
3/24/2020
3/25/2020
3/26/2020
3/27/2020
3/28/2020
3/29/2020
3/30/2020
3/31/2020
Day of YearDaily PrcpMultiday Prcp
4/1/2020
4/2/2020
4/3/2020
4/4/2020
4/5/2020
4/6/2020
4/7/2020
4/8/2020
4/9/2020
4/10/2020
4/11/2020
4/12/2020
4/13/2020
4/14/2020
4/15/2020
4/16/2020
4/17/2020
4/18/2020
4/19/2020
4/20/2020
4/21/2020
4/22/2020
4/23/2020
4/24/2020
4/25/2020
4/26/2020
4/27/2020
4/28/2020
4/29/2020
4/30/2020
5/1/2020
5/2/2020
5/3/2020
5/4/2020
5/5/2020
5/6/2020
5/7/2020
5/8/2020
5/9/2020
5/10/2020
5/11/2020
5/12/2020
5/13/2020
5/14/2020
5/15/2020
5/16/2020
5/17/2020
5/18/2020
5/19/2020
5/20/2020
5/21/2020
5/22/2020
5/23/2020
5/24/2020
5/25/2020
5/26/2020
5/27/2020
5/28/2020
5/29/2020
5/30/2020
5/31/2020
6/1/2020
6/2/2020
6/3/2020
6/4/2020
6/5/2020
6/6/2020
6/7/2020
6/8/2020
6/9/2020
6/10/2020
6/11/2020
6/12/2020
6/13/2020
6/14/2020
6/15/2020
6/16/2020
6/17/2020
6/18/2020
6/19/2020
6/20/2020
6/21/2020
6/22/2020
6/23/2020
6/24/2020
6/25/2020
6/26/2020
6/27/2020
6/28/2020
6/29/2020
6/30/2020
Day of YearDaily PrcpMultiday Prcp
7/1/2020
7/2/2020
7/3/2020
7/4/2020
7/5/2020
7/6/2020
7/7/2020
7/8/2020
7/9/2020
7/10/2020
7/11/2020
7/12/2020
7/13/2020
7/14/2020
7/15/2020
7/16/2020
7/17/2020
7/18/2020
7/19/2020
7/20/2020
7/21/2020
7/22/2020
7/23/2020
7/24/2020
7/25/2020
7/26/2020
7/27/2020
7/28/2020
7/29/2020
7/30/2020
7/31/2020
8/1/2020
8/2/2020
8/3/2020
8/4/2020 1.76
8/5/2020 1.31
8/6/2020 1.80
8/7/2020 T
8/8/2020 0.88
8/9/2020 0.00
8/10/2020 0.00
8/11/2020 0.00
8/12/2020 0.03
8/13/2020 1.74
8/14/2020 0.34
8/15/2020 0.04
8/16/2020 1.12
8/17/2020 0.03
8/18/2020 0.07
8/19/2020 0.04
8/20/2020 0.16
8/21/2020 0.00
8/22/2020 0.03
8/23/2020 0.01
8/24/2020 0.00
8/25/2020 0.04
8/26/2020 T
8/27/2020 0.00
8/28/2020 0.00
8/29/2020 0.50
8/30/2020 0.10
8/31/2020 0.00
9/1/2020 0.40
9/2/2020 0.05
9/3/2020 0.58
9/4/2020 1.22
9/5/2020 0.00
9/6/2020 0.00
9/7/2020 0.00
9/8/2020 0.00
9/9/2020 0.00
9/10/2020 0.24
9/11/2020 1.73
9/12/2020 0.01
9/13/2020 0.04
9/14/2020 0.00
9/15/2020 0.00
9/16/2020 0.00
9/17/2020 0.00
9/18/2020 0.10
9/19/2020 0.00
9/20/2020 0.00
9/21/2020 0.00
9/22/2020 0.00
9/23/2020 0.00
9/24/2020 0.00
9/25/2020 0.00
9/26/2020 0.43
9/27/2020 0.07
9/28/2020 T
9/29/2020 0.00
9/30/2020 0.27



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
1/25/2020 7:00 AM 1.61 M M M M Most of rain fell between midnight and 6AM 1/25/2020. Max rain rate of 3.29"/hr at 4:55AM 1/25/2020.
8/4/2020 7:00 AM 1.76 M M M M Rumbles of thunder could be heard as early as 4PM. Rain began ~4:30PM. Max rain rate of 3.76"/hr at 4:58PM. Most significant rain 4:30-6PM ((0.57") and then early Tue morning 3AM-7AM (1.04").
8/5/2020 7:00 AM 1.31 M M M M Most significant rain occurred 7AM to 10AM (1.26"). Storm total 4:30PM Aug 3 to 11:30AM Aug 4=3.07"
8/6/2020 7:00 AM 1.80 M M M M 1.8" between 3AM and 6:30AM;Hourly breakdown and max rain rate during that hour: 3-4AM - 0.36"/1.57"/hr; 4-5AM - 0.04"/0.55"/hr; 5-6AM - 1.39"/4.84"/hr(5:24AM); 6-7AM - 0.01/0.26"/hr. So far for first 5.5 days in August, have had 4.94" ranking 9th greatest August amount since 1985.
8/7/2020 7:00 AM T M M M M Brief sprinkle/shower ~7PM.
8/8/2020 7:00 AM 0.88 M M M M Most of the rain (0.87") occurred between 8 and 9PM with max rain rate of 7.2"/hr at 8:31PM. Since 1985, most rain (5.82") to occur in any 7 consecutive day period in August. August 2020 now 6th highest monthly rainfall for August since 1985 and still have a little more than 3 weeks of the month to get through.
8/9/2020 7:00 AM 0.00 0.0 M M M Only third calendar day (out of 8, so far) with no rain this month. High temp Aug 8 of 84.9 coming unusually late in the day at 6:16PM. Low morning of 9th of 69.9 at 6:19AM.
8/10/2020 7:00 AM 0.00 0.0 M M M
8/11/2020 7:00 AM 0.00 0.0 M M M Max temp 93.9 at 1:47PM Aug 10;Low temp 73.7 at 6:06AM Aug 11.
8/12/2020 7:00 AM 0.03 M M M M Lightning to west observed prior to rainfall between 6 and 7AM. Max rain rate of 0.15"/hr registered at 6:36AM. Max temp August 11 was 92.4;Overnight low 74.9 at 7:13AM.
8/13/2020 7:00 AM 1.74 M M M M First clap of thunder heard ~5:05PM. Followed by rain beginning at 5:25PM. Here are hourly amount and max hourly rates:5-6PM-1.38"/7.68"/hr@5:46PM; 6-7PM-0.27"/ 2.18"/hr; 7-8PM-0.03"/0.07"per hr; 8-9PM-0.05"/0.08"per hr; 9-10PM-0.01"/0.07" per hr. 7.59" total so far for first 12 days of August...already highest monthly rainfall for August since keeping records at current location back to 1985. Calendar temp for August 12: High temp=93.8@ 3:34PM;Low=73.0 @ 7:48PM.
8/14/2020 7:00 AM 0.34 M M M M Rain began short before 8AM Aug 13 and ended before noon. Hourly rain amounts and max rain rates for each hr: 7-8AM-0.01"/0.01" per hr; 8-9AM-0.10"/0.13" per hr; 9-10AM-0.14"/0.20" per hr(9:38AM); 10-11AM-0.06"/0.15" per hr; 11AM-Noon-0.03"/0.08" per hr. Total for month=7.93(record for highest amount in Aug since 1985. Max temp Aug 13=82.8@ 4:43PM;Lo for Aug 13=72.6@ 2:56AM
8/15/2020 7:00 AM 0.04 M M M M Sprinkles ~2PM (Aug14); .03" between 3 and 4PM with a max rain rate of 0.32"/hr at 3:29PM. 0.01" between 6 and 7AM Aug15. Max temp 86.5 at 2:59PM (Aug 14). Low=72.6 at 11:42PM Aug14.
8/16/2020 7:00 AM 1.12 M M M M Hourly rain amounts and max hourly rain rates observed: 8-9PM-T; 9-10PM-0.03"/0.03"per hr; 10-11PM-0.01"/ 0.01" per hr; 11PM-Midnight-0.10"/0.28" per hr; Midnight-1AM- 0.15"/0.71" per hr; 1-2AM- 0.47"/4.68"per hr at 1:31AM; 2-3AM- 0.19"/0.59" per hr; 3-4AM- 0.06"/0.36" per hr; 4-5AM- 0.07"/0.09"per hr; 5-6AM-0.04"/0.08"per hr; 6-7AM-Trace. Aug total so far=9.09"(record for August). Highest monthly rainfall since Sept 2018 (11.17"). Calendar day for 8/15 Hi/Lo=78/69.8=lowest avg temp since June 20.
8/17/2020 7:00 AM 0.03 M M M M Hourly rain amounts/max hourly rain rates are as follows: 7-8AM- 0.01"/0.01"per hr; 8-9AM- 0.02"/0.02"per hr; 9-10AM- Trace;Noon-1PM- Trace. August rainfall so far=9.12; Yearly rainfall so far=35.68". Calendar Hi/Lo temp for August 16=73.7/63.9 , Lowest avg temp since Jun 17.
8/18/2020 7:00 AM 0.07 M M M M All rainfall occurred between 6PM and 7PM. Thunder first heard around 5:50PM. Most of the rain over by 6:30PM...but last of the steady light rain fell 6:30-6:40PM with sunshine. Max rain rate=3.25"/hr at 6:08PM. Total rainfall for August now a record breaking 9.19". Calendar day Hi/Lo for August 17=85.0 (3:15PM)/ 61.9 (5:16AM). Lowest temperature since June 16.
8/19/2020 7:00 AM 0.04 M M M M Rain began sometime between 5 and 6AM;5-6AM- 0.01" max rain rate-.01"/hr; 6-7AM- 0.03" max rain rate 0.35"/hr. Steady light to occl moderate rain at observation(7AM). August 18 Hi/Lo temperature= 86.0(3:48PM)/64.3(6:58AM).
8/20/2020 7:00 AM 0.16 M M M M Rainfall between 7 and 8AM was 0.15" and max rain rate was 0.93"/hr at 7:49AM. Rainfall between 8 and the ending at 8:07AM was 0.01" with a max rain rate of 0.08"/hr. Total rainfall now for month=9.39"
8/21/2020 7:00 AM 0.00 0.0 M M M Only 8th calendar day (Aug 20;out of 20)this month with no rain. Calendar day Hi/Lo for August 20=82.2 (3:02PM)/ 62.7 (6:51AM).
8/22/2020 7:00 AM 0.03 0.0 0.00 0.0 0.00 Rain in overnight mostly between 1AM and 4AM. Hourly rain and max rain rate for that hour: 1-2AM- 0.01"/0.01"per hr; 3-4AM- 0.02"/0.07"per hr at 3:19AM. Total rainfall for August now 9.42". Calendar Hi/Lo temperature for August 21: 85.7 at 2:41PM/65.4 at 4:38AM.
8/23/2020 7:00 AM 0.01 0.0 0.00 0.0 0.00 Brief rain shower mid afternoon between 4 and 5PM. 13 of 22 calendar days this August have seen at least 0.01" of rain. Calendar day Hi/Lo temperature for August 22: 85.7 at 1:20PM/72.9 at 6:29AM.
8/24/2020 7:00 AM 0.00 0.0 M M M Storms went by to my north late afternoon/early evening and an outflow boundary looked to go through between 6:15 and 6:45PM, but saw no rain. Pressure jump from 29.92"(5:21PM) to 29.96"(7PM) followed by fall to 29.94"(8PM) then rise to 29.97" (9PM) noted. Also noted sun dog at least an hour before sunset in western sky. Calendar day Hi temp-90.2 at 3:07PM;Low temp 72.0 shortly before midnight. Heat Index 100 at 2:27PM and highest heat index in over a week.
8/25/2020 7:00 AM 0.04 M M M M Light rain just before 2PM and a brief, but heavy rain shower between 2PM and 2:15PM in the early afternoon. Max rain rate of 1.64"/hr with that brief, heavy rain shower centered on 2:08PM. Thunder noted around 2PM. Total rain 0.04" mainly between 1:55PM and 2:15PM. 9.47" now for August; Precipitation on 14 of 24 calendar days for month; 0.01" or greater on 16 of the last 26 calendar days going back to July 30. Hi temp for August 24=89.6 at 1:22PM just before rain;Lo temp for Aug 24=70.5 at 6:45AM.
8/26/2020 7:00 AM T M M M M Thunder heard before 6:30PM;Possible brief shower 6:30- 7PM, but did not wet entire ground. Most noticeable weather data parameters:dewpoint maxed out at 77 at 6:31PM, then dropped to 74 by 7PM, 73 by 8PM and 68 by 8:30PM;Lowest barometer pressure 29.76" at 5:14PM.
8/27/2020 7:00 AM 0.00 0.0 M M M Since incredible rainfall total of 9.12" Aug 1-16, have had only 0.35" since Aug 17. Calendar day Hi Temperature for August 26=85.8 at3:18PM;Low temperature=66.5 at 7:08AM.
8/28/2020 7:00 AM 0.00 0.0 M M M Though I did not see any drops because I was not outside like Rossmoor 1.3 ESE, here are some of my observations that could point to some trough or very weak wave passing through in late afternoon: lowest pressure of the day was 29.70" at 4:55PM, my max dew point for the day of 78 was at 5:17PM, then dropped from 78 to 75 by 6PM to 71 at 7PM ;Relative humidity rose from 64 to 69% between 4 and 5PM, then fell to 62% at 6PM and 58% at 7PM;temperature dropped from 89.1 at 4PM to 87.9 at 5PM and then rose to 89.4 by 6PM. Calendar day High/Low temperature for August 27 was 91.9 at 3:16PM/70.8 at 6:46AM.
8/29/2020 7:00 AM 0.50 M M M M Severe T-storm warning issued 4:35PM, but only got a few sprinkles between 4:55PM and 5:05PM. Temp did drop from 89.3 at 4PM to 81 at 5PM and 76 at 5:45PM. Dewpoint dropped from 75 at 4PM to 70 at 5PM with passage of relative dry outflow. Measurable rain did not begin till after 6PM and here are hourly observed rainfall/max rain rate between 6PM Aug 28 and 2AM Aug 29:6-7PM -0.02"/0.10"per hr;7-8PM -0.01"/0.10"per hr; 8-9PM -0.03"/0.16"per hr;9-10PM - 0.11"/0.17"per hr; 10-11PM - 0.16"/0.24"per hr;11-Midnite -0.03"/0.15"per hr;Midnite-1AM - 0.05"/0.17"per hr;1-2AM -0.09"/0.27" per hr. Nothing more than a trace 2AM to 7AM. Calendar day Hi/Lo temperature for Aug 28:Hi=89.7 at 3:50PM/Lo=70.9 at 6:41AM. Through 7AM total for August= 9.97".
8/30/2020 7:00 AM 0.10 M M M M Hourly rainfall observations and max rain rate for that hour was as follows:7-8AM -0.05"/0.28"per hr at 7:45AM; 8-9AM -0.01"/0.04"per hr; 9-10AM -0.02"/0.02"per hr; 10-11AM -0.01"/0.01"per hr;11-Noon -0.01"/0.01"per hr. Total rainfall for event (5PM Aug 28 to Noon Aug 29) was 0.60". Lowest barometer with passage of remnants of Laura was 29.46" at 3:45PM. Lowest barometer pressure since April 13 of this year;Calendar Hi/Lo temperature for Aug 29: 84.7 at 5:03PM/71.9 at 2:44AM. Total Rainfall for August is now 10.07".
8/31/2020 7:00 AM 0.00 0.0 M M M A perfect weather day and night...one of the few this month of August. Calendar high/low temperature:80.3 at 2:33PM/62.7 at 6:27AM.
9/1/2020 7:00 AM 0.40 M M M M Few sprinkles/light showers from 9:15AM to 1:00PM that measured a trace. Observed hourly rain amount/max rain rate for that hour are as follows: 1-2PM -0.03"/0.04" per hr; 2-3PM -0.03"/0.06"per hr;3-4PM -0.01"/0.06"per hr; 4-5PM -0.02"/0.02"per hr; 5-6PM -0.13"/0.31"per hr; 6-7PM -0.16"/0.75"per hr; 7-8PM -0.01"/0.04" per hr; 8-10PM -Trace or less; 10-11PM -0.01"/0.01"per hr. Final total rainfall for August=10.47" (record for August since keeping records back to 1985);Largest monthly rainfall since Sep,2018 (11.17"). Total Precipitation so far for 2020=37.03". Calendar day Hi/Lo Temperature for August 31=74.1 at 12:41PM/65.6 at midnight.
9/2/2020 7:00 AM 0.05 M M M M Bulk of rain came with some showers 10PM to midnight and toward morning. Hourly measurable rain amounts/ hourly max rain rates are as follows:10-11PM -0.01"/ 0.01"per hr;11PM-Midnight -0.03"/0.13"per hr at 11:22PM;5-6AM -0.01"/0.01"per hr. Calendar day Hi/Lo temperature for September 1: Hi-78.9 at 3:08PM/Lo-66.2 at 2:16AM.
9/3/2020 7:00 AM 0.58 M M M M Almost all of the rain came between 7:50PM and 8:50PM: Hourly rainfall and max rain rate for that hour are as follows: 7-8PM -0.11"/4.30"per hr at 7:58PM;8-9PM -0.47"/2.91"per hr. Barometer pressure jump from 29.71" at 7PM to 29.78" by 8PM. Temperature dropped from 83.3 at 7PM to 80.2 at 8PM to 74.1 by 9PM. Calendar Hi/Low temperature for September 2: 86.8(4PM)/72.5(2:53AM).
9/4/2020 7:00 AM 1.22 M M M M Hourly rain amounts/max rain rates for that hour are as follows: 4-5PM -0.03"/0.79"per hr(4:55-5:00PM); 5-6PM - 0.83"/13.71"per hr at 5:06PM (largest max rain rate since 2018); 6-7PM -nothing more than a trace; 7-8PM - 0.11"/1.46"per hr (round #2); 8-9PM -0.04"/0.38"per hr; 9-10PM -0.11"/2.58"per hr round #3 ended around 9:30PM; 10-11PM -0.09"/3.49"per hr (more moderate rain with round #4 around 10:45PM; 11PM-1AM -0.01"/0.04"per hr (final rain). Some notes:Had to head to basement at 4:50PM when tornado warning issued and left basement at 5:25PM. No damage noted around house. 22 of last 36 days since July 30 have seen at least 0.01". Max dewpoint was 79 at 5:00PM and Dulles 8PM sounding recorded highest precipitable water value (2.64") for any September and tied (August 1955) highest for any month. Lowest pressure 29.63" at 4:43PM;Calendar day Hi/Low for Sep 3 was 89.4(2:40PM)/70.7(6:44AM) and temperature dropped from 88 at 4PM to 85 at 5PM to 77.5 by 6PM.
9/5/2020 7:00 AM 0.00 0.0 M M M Calendar day Hi/Lo temperature for September 4 was 87.4 at 2:07PM/67.1 at 11:56PM. Dew point ranged from 75 at 12:01AM to 62 at 11:55PM. In addition:The temperature fell below 60 degrees at 5AM this morning (Sep 5) marking the end of a record breaking consecutive 81 days since June 16 that my temperature has stayed above 60F.
9/6/2020 7:00 AM 0.00 0.0 M M M Calendar Hi/Lo temperature for September 5: 79.4 at 3:03PM/57.4 at 7:09AM. 57.4 is lowest temperature since June 2.
9/7/2020 7:00 AM 0.00 0.0 M M M Calendar day Hi/Lo Temperature:84.6 at 1:43PM/58.3 at 6:50AM. First back-to-back low temperatures below 60F since June 15-16. A very pleasantly warm and comfortable afternoon.
9/8/2020 7:00 AM 0.00 0.0 M M M High/Low Temperature for Sep 7: 83.7 at 12:59PM/60.9 at 6:53AM. Fourth straight calendar day with no precipitation. Last time that happened was Aug 8-11.
9/9/2020 7:00 AM 0.00 0.0 M M M Note that Sept 8 was the 5th straight calendar day of no rain and that is the longest period with no rain since July 25-29. Calendar day Hi/Lo temperature for Sept 8: 84.7 at 2:43PM/Low 61.6 at 6:55AM.
9/10/2020 7:00 AM 0.24 M M M M A few showers early to mid-afternoon (0.04"). Steadier rain/showers evening into the overnight (0.20"). Hourly rain amounts and max rain rate for each hr follows:1-2PM- 0.03"/0.22"per hr; 3-4PM -0.01"/0.01"per hr; 8-9PM -0.04"/0.11"per hr; 9-10PM -0.06"/0.23"per hr at 9:47PM; 10-11PM - 0.09"/0.17"per hr; Midnight to 1AM -0.01"/0.01"per hr. Calendar day Hi/Lo temperature for Sep 9:77.8 at 12:37PM/70.1 at 3:22AM.
9/11/2020 7:00 AM 1.73 M M M M Wettest day since August 6. Hourly rain amounts and max hourly rain rates follows:8-9AM -0.01"/0.01"per hr; 10-11AM -0.02"/0.02"per hr;11AM-Noon-0.17"/2.10"per hr; Noon-1PM -0.16"/0.89"per hr(thunder heard); 1-2PM-0.61" /2.47"per hr at 1:39PM; 2-3PM -0.66"/2.31"per hr; 3-4PM -0.10"0.24"per hr;4-5PM -Trace/0.04"/hr. Rainfall for month Calendar day Hi/Low temperature for Sep 10: 78.7 at 5:19PM/74.2 at 5:09AM. Note: Moisture fetches were off both the Atlantic and Gulf of Mexico plus total moisture or "atmospheric river" all the way from Panama. Rainfall for 1st 10 days of Sep=3.82" and that is almost 5 times my entire Sep 2019 total for month.
9/12/2020 7:00 AM 0.01 M M M M Some light rain began in the 5-6AM hour as surface pressure was rising all night. 0.01" in the 5-6AM hour with a max rain rate of 0.01"/hr. Trace or no rain reported 6-7AM hour. Additional 0.04" occurred after 7AM to 8:45AM that will be reported on 9/13. Calendar day Hi/Low temperature for September 11: 77.2 at 2:58PM/70.0 at 8:56PM.
9/13/2020 7:00 AM 0.04 M M M M Light rain that ended by 9AM. 7-8AM -0.03", max rain rate 0.09"/hr at 7:32AM; 8-9AM -0.01", max rain rate 0.01"/hr. Rainfall for Sep so far is 3.87" and for year is 40.90" . Calendar Hi/Low temperature for September 12: 73.1 at 4:14PM/63.0 at 11:45PM.
9/14/2020 7:00 AM 0.00 0.0 M M M Calendar day Hi/Low temperature for Sep 13, 2020: 80.6 at 3:06PM/58.5 at 6:00AM.
9/15/2020 7:00 AM 0.00 0.0 M M M Calendar Hi/Low temperature for September 14 was: 76.5 at 2:59PM/57.7 at 11:57PM.
9/16/2020 7:00 AM 0.00 0.0 M M M Calendar Day High/Low Temperature for September 15: 67.2 at 2:32PM/49.6 at 7:04AM . First sub 50 degree temperature since June 1 (47.0);First sub 70 degree high since May 24 (69.0) and lowest daytime temperature since May 20 (62)
9/17/2020 7:00 AM 0.00 0.0 M M M Calendar day high/low temperature for Sep 16 was: 72.3 at 2:36PM/49.3 at 4:38AM. First two consecutive sub-50 degree lows since May 13-14.
9/18/2020 7:00 AM 0.10 M M M M First rain since September 12 began around 5PM and from outer edges of former Hurricane Sally. Hourly rain amounts/max hourly rain rates are as follows: 5-6PM -0.05"/0.06"per hr at 5:25PM; 8-9PM -0.01"/0.01" per hr; 9-10PM -0.02"/0.02"per hr; 10-11PM -0.01"/0.01" per hr; 2-3AM -0.01"/0.01"per hr. Lowest pressure of 29.82 at 4:54AM with well south pass by of the remains of Sally. Calendar day High/Low temperature on September 17: 72.5 at 2:13PM/58.1 at 7:10AM.
9/19/2020 7:00 AM 0.00 0.0 M M M Calendar day Hi/Low temperature for September 18: 72.7 at 2:45PM/57.0 at 11:49PM. Note for Sep 19 low temperature:42.8 was lowest Sept temperature since Sept 26, 2001 (42F); lowest temperature so early in September since Sep 18, 1990 (38.5).
9/20/2020 7:00 AM 0.00 0.0 M M M Calendar day High/Low temp for September 19,2020: 63.3 at 3:29PM/42.8 at 7:15AM; Lowest daytime Hi Temp so early in September with sunshine since Sep 17, 1990 (62). Lowest Sep temperature (42.8) since 2001 (Sep 26 - 42F);Lowest Sep temperature (42.8) so early in month since Sep 18, 1990 (38.5).
9/21/2020 7:00 AM 0.00 0.0 M M M Calendar day High/Low temperature for September 20: 66.4 at 2:41PM/42.3 at 5:38AM. Lowest September temperature since 2001;lowest so early September temperature since 1990. Highest barometer=30.47" at midnight and maybe my highest September barometer pressure ever (although that was eclipsed this morning with a 30.52" pressure at 10:08AM.
9/22/2020 7:00 AM 0.00 0.0 M M M Calendar day high/low temperature for September 21: 65.5 at 2:41PM/42.8 at 6:55AM. Third consecutive sub 66.5 high temp in Sep...last time that happened in September was 2001;last time that happened so early in September was 1990. Highest barometric pressure was 30.52" at 10:08AM, my highest September pressure in my records going back to 1985. Min relative humidity (RH) was 36 percent at 2:22PM and this was the lowest RH, so far, for the month.
9/23/2020 7:00 AM 0.00 0.0 M M M Calendar High/Low Temperature for September 22: 69.4 at 2:36PM/42.3 at 7:13AM. Fourth consecutive sub 43F night. Only time period closest to this was Sep 13-16, 1985, however two of those nights had a Low temperature exactly at 43. Fourth straight day of sunny skies;you have to go back to Jan 19-22 of this year for that many days of sunny skies in a row.
9/24/2020 7:00 AM 0.00 0.0 M M M Calendar Day High/Low Temperature for September 23: 78.4 @ 4:39PM (highest temperature since Sep 13)/ 49.6 @ 7:12AM (5th sub 50 deg low in Sep since 2001. Also of note:this was the 5th straight mostly sunny day;longest period of sunny wx since Nov 1-6, 2019.
9/25/2020 7:00 AM 0.00 0.0 M M M Calendar Day High/Low Temperature for Sep 24: 71.9 at 3:21PM/57.4 at 2:20AM. Avg temperature for September currently running slightly below normal. First almost totally cloudy day since Sep 17.
9/26/2020 7:00 AM 0.43 M M M M Other than a few very light showers or sprinkles during the mid/late afternoon through mid evening hours, the more important steadier rain began late evening in the 11PM to midnight hour and ended as very light rain in hours before daybreak. Hourly rain amounts/rain rates are as follows: Trace between 3PM and 11PM;11PM-Midnight- 0.02"/0.07" per hr at 11:48PM;Midnight to 1AM- 0.09"/0.29"per hr; 1-2AM- 0.15"/0.49"per hr at 1:29AM;2-3AM- 0.10"/0.16" per hr;3-4AM- 0.03"/0.07"/hr;4-5AM- 0.02"/0.06"per hr; 5-6AM- 0.01"/0.01"per hr;6-7AM- 0.01"/0.01"per hr. This was the first measurable rain since early AM on Sep 18. Calendar Day Hi/Low Temperature for September 25: 69.9 at 2:51PM/57.6 at 5:38AM. Cloudy days on Sep 24 and 25. This is the first time since Sept 10-11 there was two consecutive cloudy days.
9/27/2020 7:00 AM 0.07 M M M M A few very light showers or sprinkles during the day Sep 26. Strongest sunshine 3:30-4:00PM in afternoon. Then a slightly heavier shower evening between 9PM and 10PM when I got 0.01". Then some more rain or showers overnight between 2AM and 6AM when I got 0.06". 2-3AM -0.02"/max rain rate 0.06"per hr at 2:36AM; 3-4AM -0.01"/max rain rate 0.01"per hr; 4-5AM -0.02"/ max rain rate 0.02"per hr;5-6AM -0.01"/0.01"per hr. Sep rain tot so far=4.47"(14th highest(Sep)since 1985. Calendar Day Hi/Low Temperature for Sep 26: 70.7 at 3:46PM (most sunshine of day)/62.0 at 4:29AM.
9/28/2020 7:00 AM T M M M M No idea when the drizzle or very light shower came, but could have been early morning before obs time. Calendar Day High/Low Temperature for September 30: 75.9 at 4:06PM/66.1 at 7:08AM; 70+ dew points return for first time since Sep 13. Little sun, but a mostly cloudy day for the 4th day in a row. Most consecutive mostly cloudy days since Feb 10-13, 2020.
9/29/2020 7:00 AM 0.00 0.0 M M M Most sun (but still only partly sunny at times) in 5 days. Calendar Day High/Low temperature for September 28: 78.5 at 4:51PM (highest temperature since Sep 13(80.6) /66.0 at 3:15AM. Max dew point=72 and highest dew point since Sep 11.
9/30/2020 7:00 AM 0.27 M M M M Other than a brief sprinkle or very light shower during the day on the 29th, steadiest rain began mid-evening and continued through part of the overnight hours. Hourly rain amounts/max rain rate per hr is as follows: 9-10PM -0.01"/0.01"per hr; 10-11PM -0.04"/0.05"per hr; 11PM-Midnight -0.10"/0.26"per hr at 11:28PM; Midnight- 1AM -0.02"/0.05"per hr; 1-2AM -0.03"/0.05"per hr; 2-3AM -0.05"/0.13"per hr at 2:41AM; 3-4AM -0.02"/ 0.05"per hr. Total rainfall for September now 4.74" which is 11th highest September rainfall since 1985 (36 years);Total precipitation so far 2020=41.77" . Calendar High/Low Temperature for Sep 29: 79.8 at 2:46PM (highest temp since Sep 13)/56.0 at 11:58PM. Highest dew point for Sep 29 was 71 with biggest dew point drop from 69 to 63 between 4 and 5PM. Lowest pressure with this storm was 29.50" at 1:56AM Sep 30 which was lowest pressure for this September and lowest pressure since August 29 (29.46").



Start Date End Date & Time Duration in Days Precipitation Snow Depth Snow Depth SWE Notes



Observation Date Observation Time Notes Largest Stone Size Average Stone Size Smallest Stone Size Stone Consistency Duration Minutes Durration Accuracy Damage Timing More Rain than Hail Hail Started Largest Hail Started Angle of Impact Number of Stones on Pad Distance Between Stones on Pad Depth of Stones on Ground