Station Overview Station Location
Station Number MD-MG-18 Latitude 39.092094
Station Name Colesville 1.7 W Longitude -77.038549
County Montgomery Elevation (ft) 361



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 11 3.51 4.93 22 4.93 22 0.00 0 0 12 0 0.1 1 0
Nov 11 3.54 2.67 27 2.67 27 0.00 0 0 10 1 0.0 0 0
Dec 11 3.25 4.36 30 4.36 30 0.00 0 0 9 0 0.0 0 0
Jan 12 3.00 2.10 20 2.10 20 0.00 0 0 10 4 1.8 2 3
Feb 12 2.85 0.93 20 0.93 20 0.00 0 0 8 1 1.4 4 1
March 12 3.82 4.14 17 4.14 17 0.00 0 0 8 0 0.0 0 0
April 12 3.39 2.15 18 2.15 15 0.00 3 0 6 1 0.0 0 0
May 12 4.25 3.41 19 3.10 18 0.31 1 1 10 3 0.0 0 0
June 12 3.96 2.89 23 2.89 23 0.00 0 0 8 2 0.0 0 0
July 12 4.02 3.71 21 2.15 18 1.56 3 1 9 2 0.0 0 0
Aug 12 3.21 3.75 19 3.75 19 0.00 0 0 11 1 0.0 0 0
Sept 12 4.05 2.62 21 2.62 21 0.00 0 0 11 0 0.0 0 0
Water Year Totals: 42.85" 37.66" 257 days 35.79" 250 1.87" 7 days 2 112 days 15 days 3.3" 7 days 4 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
10/1/2011 0.00
10/2/2011 0.75
10/3/2011
10/4/2011
10/5/2011
10/6/2011
10/7/2011
10/8/2011
10/9/2011 0.00
10/10/2011 0.00
10/11/2011 0.00
10/12/2011 0.02
10/13/2011 0.43
10/14/2011 1.19
10/15/2011 0.32
10/16/2011 0.00
10/17/2011 0.00
10/18/2011 0.00
10/19/2011 0.53
10/20/2011 0.38
10/21/2011 0.00
10/22/2011
10/23/2011
10/24/2011 0.00
10/25/2011 0.01
10/26/2011
10/27/2011 0.16
10/28/2011 0.15
10/29/2011 0.37
10/30/2011 0.62
10/31/2011 0.00
11/1/2011 0.00
11/2/2011 0.00
11/3/2011 0.00
11/4/2011 0.00
11/5/2011 0.00
11/6/2011 0.00
11/7/2011 0.00
11/8/2011 0.00
11/9/2011 0.00
11/10/2011 0.01
11/11/2011 0.12
11/12/2011
11/13/2011 0.00
11/14/2011 0.00
11/15/2011 0.00
11/16/2011 0.16
11/17/2011 0.27
11/18/2011 T
11/19/2011 0.00
11/20/2011 0.00
11/21/2011 0.20
11/22/2011 0.23
11/23/2011 1.10
11/24/2011 0.01
11/25/2011 0.00
11/26/2011
11/27/2011
11/28/2011 0.00
11/29/2011 0.04
11/30/2011 0.53
12/1/2011 0.00
12/2/2011 0.00
12/3/2011 0.00
12/4/2011 0.00
12/5/2011 0.00
12/6/2011 0.11
12/7/2011 0.66
12/8/2011 1.89
12/9/2011 0.00
12/10/2011 0.00
12/11/2011 0.00
12/12/2011 0.00
12/13/2011 0.00
12/14/2011 0.00
12/15/2011 0.00
12/16/2011 0.04
12/17/2011 0.00
12/18/2011 0.00
12/19/2011 0.00
12/20/2011 0.00
12/21/2011 0.00
12/22/2011 0.11
12/23/2011 0.89
12/24/2011 0.02
12/25/2011 0.00
12/26/2011 0.00
12/27/2011 0.00
12/28/2011 0.63
12/29/2011 0.00
12/30/2011 0.01
12/31/2011
Day of YearDaily PrcpMultiday Prcp
1/1/2012
1/2/2012 0.06
1/3/2012 0.00
1/4/2012 T
1/5/2012 0.00
1/6/2012
1/7/2012 0.00
1/8/2012 0.00
1/9/2012 0.00
1/10/2012 0.06
1/11/2012
1/12/2012 1.15
1/13/2012 0.13
1/14/2012
1/15/2012
1/16/2012
1/17/2012 0.15
1/18/2012 0.11
1/19/2012 0.00
1/20/2012
1/21/2012 0.27
1/22/2012 T
1/23/2012 0.02
1/24/2012 0.03
1/25/2012
1/26/2012 T
1/27/2012 0.12
1/28/2012
1/29/2012
1/30/2012 T
1/31/2012
2/1/2012 0.02
2/2/2012 0.06
2/3/2012 0.00
2/4/2012
2/5/2012 0.18
2/6/2012 T
2/7/2012 0.00
2/8/2012 0.00
2/9/2012 0.11
2/10/2012 0.00
2/11/2012 0.21
2/12/2012 0.03
2/13/2012 0.00
2/14/2012 0.00
2/15/2012 0.00
2/16/2012
2/17/2012 0.16
2/18/2012
2/19/2012
2/20/2012
2/21/2012
2/22/2012
2/23/2012
2/24/2012
2/25/2012 0.16
2/26/2012 0.00
2/27/2012 0.00
2/28/2012 0.00
2/29/2012 0.00
3/1/2012 1.65
3/2/2012 0.00
3/3/2012 0.89
3/4/2012
3/5/2012 0.00
3/6/2012
3/7/2012
3/8/2012 0.00
3/9/2012 0.05
3/10/2012
3/11/2012
3/12/2012
3/13/2012 0.01
3/14/2012 0.00
3/15/2012
3/16/2012
3/17/2012
3/18/2012
3/19/2012
3/20/2012 1.10
3/21/2012 0.01
3/22/2012 0.00
3/23/2012 0.00
3/24/2012
3/25/2012 0.36
3/26/2012 0.00
3/27/2012
3/28/2012 0.00
3/29/2012 0.07
3/30/2012 0.00
3/31/2012
Day of YearDaily PrcpMultiday Prcp
4/1/2012
4/2/2012 0.14
4/3/2012
4/4/2012
4/5/2012
4/6/2012
4/7/2012 0.00
4/8/2012 0.00
4/9/2012 0.00
4/10/2012 0.00
4/11/2012
4/12/2012 0.00
4/13/2012
4/14/2012
4/15/2012
4/16/2012
4/17/2012
4/18/2012 0.00
4/19/2012 0.27
4/20/2012 0.00
4/21/2012
4/22/2012 0.31
4/23/2012 1.29
4/24/2012 0.02
4/25/2012 0.00
4/26/2012 T
4/27/2012 0.12
4/28/2012 **
4/29/2012 **
4/30/2012 **
5/1/2012 0.31
5/2/2012 T
5/3/2012
5/4/2012
5/5/2012
5/6/2012
5/7/2012
5/8/2012
5/9/2012 0.27
5/10/2012 0.43
5/11/2012 0.00
5/12/2012
5/13/2012
5/14/2012 0.06
5/15/2012 0.90
5/16/2012 T
5/17/2012 0.00
5/18/2012 0.00
5/19/2012
5/20/2012
5/21/2012 0.31
5/22/2012 0.26
5/23/2012 T
5/24/2012 0.15
5/25/2012 0.01
5/26/2012
5/27/2012
5/28/2012 0.20
5/29/2012 0.00
5/30/2012 0.51
5/31/2012 0.00
6/1/2012 0.00
6/2/2012 1.48
6/3/2012 0.00
6/4/2012 T
6/5/2012 0.00
6/6/2012 0.00
6/7/2012 0.02
6/8/2012 T
6/9/2012 0.00
6/10/2012
6/11/2012
6/12/2012 0.11
6/13/2012 0.30
6/14/2012 0.00
6/15/2012 0.00
6/16/2012
6/17/2012
6/18/2012 0.04
6/19/2012 0.03
6/20/2012 0.00
6/21/2012 0.00
6/22/2012 0.00
6/23/2012 0.19
6/24/2012
6/25/2012
6/26/2012
6/27/2012 0.00
6/28/2012 0.00
6/29/2012 0.00
6/30/2012 0.72
Day of YearDaily PrcpMultiday Prcp
7/1/2012 0.00
7/2/2012 0.18
7/3/2012 0.00
7/4/2012 0.03
7/5/2012 0.00
7/6/2012
7/7/2012
7/8/2012
7/9/2012 0.14
7/10/2012 0.12
7/11/2012 0.00
7/12/2012 0.00
7/13/2012 T
7/14/2012 0.36
7/15/2012
7/16/2012 0.07
7/17/2012
7/18/2012
7/19/2012 0.05
7/20/2012 1.18
7/21/2012 **
7/22/2012 **
7/23/2012 1.56
7/24/2012 0.00
7/25/2012 0.02
7/26/2012 0.00
7/27/2012 T
7/28/2012
7/29/2012
7/30/2012
7/31/2012
8/1/2012
8/2/2012
8/3/2012
8/4/2012
8/5/2012
8/6/2012
8/7/2012
8/8/2012 0.00
8/9/2012
8/10/2012 1.97
8/11/2012 0.26
8/12/2012 0.01
8/13/2012 0.00
8/14/2012 0.06
8/15/2012 0.02
8/16/2012 0.00
8/17/2012 0.00
8/18/2012 0.31
8/19/2012
8/20/2012 0.06
8/21/2012 0.61
8/22/2012
8/23/2012 0.11
8/24/2012 0.00
8/25/2012 0.00
8/26/2012 T
8/27/2012 0.31
8/28/2012 0.03
8/29/2012 0.00
8/30/2012
8/31/2012
9/1/2012
9/2/2012 0.09
9/3/2012 0.06
9/4/2012 0.02
9/5/2012 0.00
9/6/2012
9/7/2012 0.06
9/8/2012
9/9/2012 0.55
9/10/2012 0.00
9/11/2012 0.00
9/12/2012 0.00
9/13/2012
9/14/2012
9/15/2012 0.00
9/16/2012 0.00
9/17/2012 0.00
9/18/2012 0.21
9/19/2012 0.99
9/20/2012
9/21/2012
9/22/2012
9/23/2012 0.02
9/24/2012 0.00
9/25/2012 0.00
9/26/2012 0.10
9/27/2012 0.02
9/28/2012 0.50
9/29/2012 0.00
9/30/2012



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
10/1/2011 7:00 AM 0.00 0.0 M 0.0 M
10/2/2011 7:00 AM 0.75 0.0 M 0.0 M
10/9/2011 7:00 AM 0.00 0.0 M M M
10/10/2011 7:00 AM 0.00 0.0 M M M
10/11/2011 7:00 AM 0.00 0.0 M M M
10/12/2011 7:00 AM 0.02 M M M M
10/13/2011 7:00 AM 0.43 0.0 M 0.0 M Thunder shower early AM. Light rain and drizzle most of the day 11AM on.
10/14/2011 7:00 AM 1.19 0.0 M 0.0 M Thunderstorm around 6-7:30 PM 10/13. Numerous lightning very heavy rain. 1.07 .12 in another TRW at around 11 PM.
10/15/2011 7:00 AM 0.32 0.0 M 0.0 M
10/16/2011 7:00 AM 0.00 0.0 M 0.0 M
10/17/2011 7:00 AM 0.00 0.0 M 0.0 M
10/18/2011 7:00 AM 0.00 0.0 M 0.0 M
10/19/2011 7:15 AM 0.53 0.0 M 0.0 M
10/20/2011 7:00 AM 0.38 0.0 M 0.0 M
10/21/2011 7:00 AM 0.00 0.0 M 0.0 M
10/24/2011 7:00 AM 0.00 0.0 M 0.0 M
10/25/2011 7:00 AM 0.01 0.0 M 0.0 M
10/27/2011 7:30 AM 0.16 0.0 M 0.0 M
10/28/2011 7:00 AM 0.15 0.0 M 0.0 M
10/29/2011 8:00 AM 0.37 T M 0.0 M Slushy snow on objects that are well isolated from the ground -- garbage can lid and the funnel of the rain gauge. If I measured snow accumulation at those places only, there was perhaps as much as .1 inch, but there was no accumulation on the ground at all making Trace a better guess for snow amount.
10/30/2011 7:00 AM 0.62 0.1 M 0.0 M Rain and snow mixed from 7AM-2PM yesterday (10/29) changes to all snow. Snow briefly accumulates on the snow board at around 4PM in nice big flakes. First killing frost this morning.
10/31/2011 7:00 AM 0.00 0.0 M 0.0 M
11/1/2011 7:00 AM 0.00 0.0 M 0.0 M
11/2/2011 7:00 AM 0.00 0.0 M 0.0 M
11/3/2011 7:00 AM 0.00 0.0 M 0.0 M
11/4/2011 7:00 AM 0.00 0.0 M 0.0 M
11/5/2011 7:00 AM 0.00 0.0 M M M
11/6/2011 7:00 AM 0.00 0.0 M M M
11/7/2011 7:00 AM 0.00 0.0 M 0.0 M
11/8/2011 7:00 AM 0.00 0.0 M M M
11/9/2011 7:00 AM 0.00 0.0 M M M
11/10/2011 7:30 AM 0.01 0.0 M 0.0 M
11/11/2011 7:00 AM 0.12 0.0 M 0.0 M Light Rain yesterday afternoon 4-7PM.
11/13/2011 7:00 AM 0.00 0.0 M M M
11/14/2011 7:00 AM 0.00 0.0 M M M
11/15/2011 7:00 AM 0.00 0.0 M M M
11/16/2011 7:00 AM 0.16 0.0 M 0.0 M
11/17/2011 7:00 AM 0.27 0.0 M 0.0 M
11/18/2011 7:00 AM T 0.0 M 0.0 M
11/19/2011 7:00 AM 0.00 0.0 M M M
11/20/2011 7:00 AM 0.00 0.0 M M M
11/21/2011 7:00 AM 0.20 0.0 M 0.0 M
11/22/2011 7:00 AM 0.23 0.0 M 0.0 M
11/23/2011 7:00 AM 1.10 0.0 M 0.0 M Drizzle with periods of rain all day yesterday (11/22) (.82 between 7A and 11PM). Moderate shower sometime overnight (11/23 AM) with .28 inches.
11/24/2011 7:00 AM 0.01 0.0 M 0.0 M Rain showers yesterday morning and afternoon. (11/23)
11/25/2011 7:00 AM 0.00 0.0 M 0.0 M
11/28/2011 7:00 AM 0.00 0.0 M 0.0 M
11/29/2011 7:00 AM 0.04 0.0 M 0.0 M AM rain shower (Probably around 5AM 11/29)
11/30/2011 7:00 AM 0.53 0.0 M 0.0 M Rain Yesterday (11/29) off and on 7AM-7PM.
12/1/2011 7:00 AM 0.00 0.0 M 0.0 M
12/2/2011 7:00 AM 0.00 0.0 M 0.0 M
12/3/2011 7:00 AM 0.00 0.0 M 0.0 M
12/4/2011 7:00 AM 0.00 0.0 M 0.0 M
12/5/2011 7:00 AM 0.00 0.0 M 0.0 M
12/6/2011 7:30 AM 0.11 0.0 M 0.0 M
12/7/2011 7:10 AM 0.66 0.0 M 0.0 M Light rain at obs time. .16 to midnight last night. .50 Mid-7:10 AM
12/8/2011 7:00 AM 1.89 0.0 M 0.0 M Steady heavy rain 4 - 10 PM (approx.) 12/7.
12/9/2011 7:00 AM 0.00 0.0 M 0.0 M
12/10/2011 7:00 AM 0.00 0.0 M M M
12/11/2011 7:00 AM 0.00 0.0 M 0.0 M
12/12/2011 7:00 AM 0.00 0.0 M 0.0 M
12/13/2011 7:00 AM 0.00 0.0 M 0.0 M
12/14/2011 7:00 AM 0.00 0.0 M 0.0 M
12/15/2011 7:00 AM 0.00 0.0 M 0.0 M
12/16/2011 7:00 AM 0.04 0.0 M 0.0 M .03 Yesterday (12/15) around 4PM. .01 overnight.
12/17/2011 7:00 AM 0.00 0.0 M M M
12/18/2011 7:00 AM 0.00 0.0 M 0.0 M
12/19/2011 7:00 AM 0.00 0.0 M 0.0 M
12/20/2011 7:00 AM 0.00 0.0 M 0.0 M
12/21/2011 7:00 AM 0.00 0.0 M 0.0 M
12/22/2011 7:00 AM 0.11 0.0 M 0.0 M
12/23/2011 7:00 AM 0.89 0.0 M 0.0 M Rain began around 7:PM 12/22 moderate at times.
12/24/2011 7:30 AM 0.02 0.0 M 0.0 M .02 in the guage, and the ground was wet in the morning, but when did it rain and why? I thought things cleared out last night.
12/25/2011 7:00 AM 0.00 0.0 M 0.0 M
12/26/2011 7:00 AM 0.00 0.0 M 0.0 M
12/27/2011 7:00 AM 0.00 0.0 M 0.0 M
12/28/2011 7:00 AM 0.63 0.0 M 0.0 M Rain yesterday (12/27) 8AM-7PM. Moderate to heavy at times in the afternoon.
12/29/2011 7:00 AM 0.00 0.0 M 0.0 M
12/30/2011 7:00 AM 0.01 M M M M Precip sometime yesterday 12/29 reports of snow in the area, but I was at work so list new snow as NA.
1/2/2012 7:00 AM 0.06 0.0 M 0.0 M Rain Showers Yesterday Afternoon (1/1)
1/3/2012 7:00 AM 0.00 0.0 M 0.0 M Virga and snow showers to the south yesterday afternoon (1/2) but I didn't see any at the this location.
1/4/2012 7:00 AM T T M 0.0 M light snow flurries yesterday (1/3).
1/5/2012 7:00 AM 0.00 0.0 M 0.0 M
1/7/2012 7:00 AM 0.00 0.0 M 0.0 M
1/8/2012 7:00 AM 0.00 0.0 M 0.0 M
1/9/2012 7:00 AM 0.00 0.0 M M M
1/10/2012 7:00 AM 0.06 0.5 M T M Light snow yesterday afternoon.
1/12/2012 7:00 AM 1.15 0.0 M 0.0 M Rain from noon 1/11 - early AM hours 1/12. Temps in the low 40's
1/13/2012 7:00 AM 0.13 M M M M Rain showers over night.
1/17/2012 7:00 AM 0.15 0.0 M 0.0 M Light rain began around 9 PM 1/16
1/18/2012 7:00 AM 0.11 0.0 M 0.0 M Rain from yesterday (1/17) morning around 8:30 AM
1/19/2012 7:00 AM 0.00 0.0 M 0.0 M
1/21/2012 7:00 AM 0.27 1.3 M 1.0 M Snow has about .1 inch of Ice on top. --- That is included in snow amount --- I'm not sure whether it technically should or not. In any case the amount of compression from the ice probably compensates for its thickness, so I'll report the measured depth with the ice crust. included. Snow began at 10:00 PM 1/20. Changeover sometime after Midnight.
1/22/2012 7:00 AM T 0.0 M 0.5 M ZR yesterday 8AM (1/21)
1/23/2012 7:00 AM 0.02 0.0 M 0.5 M
1/24/2012 7:00 AM 0.03 0.0 M T M
1/26/2012 7:00 AM T 0.0 M 0.0 M
1/27/2012 7:10 AM 0.12 0.0 M 0.0 M Raining at observation time. .02 total from Yesterday afternoon (1/26)
1/30/2012 7:00 AM T T M T M Brief snow flurry last night (1/29) at around 11PM. At 34 degrees most melted on contact with the ground.
2/1/2012 7:00 AM 0.02 0.0 M 0.0 M AM Rain shower (before 6:30 AM)
2/2/2012 7:00 AM 0.06 0.0 M 0.0 M Rain shower between Midnight and 7AM 2/2. Max temp 2/1 69 F.
2/3/2012 7:00 AM 0.00 0.0 M 0.0 M
2/5/2012 8:00 AM 0.18 0.2 M T M Rain began around 4PM - changed to snow at 6PM, .2 inch on ground, at time that precip changed to drizzle just before ending at around 10PM (2/4)
2/6/2012 7:00 AM T T M 0.0 M A few snow flakes yesterday (2/5) around 8:30AM
2/7/2012 7:00 AM 0.00 0.0 M 0.0 M
2/8/2012 7:00 AM 0.00 0.0 M 0.0 M
2/9/2012 7:00 AM 0.11 0.2 M T M Rain in afternoon, turning to snow in the evening before ending at around 8PM 2/8.
2/10/2012 7:00 AM 0.00 0.0 M 0.0 M
2/11/2012 7:15 AM 0.21 0.7 M 0.5 M Rain began around 10PM 2/10 -- changed to snow sometime after midnight.
2/12/2012 7:00 AM 0.03 0.3 M T M Snow flurries off and on all day. A period of snow in the evening gives .3 inch of snow. Precip amount measured from gauge = .03 (not estimated).
2/13/2012 7:00 AM 0.00 0.0 M T M
2/14/2012 7:00 AM 0.00 0.0 M 0.0 M
2/15/2012 7:00 AM 0.00 0.0 M 0.0 M
2/17/2012 7:00 AM 0.16 0.0 M 0.0 M
2/25/2012 7:00 AM 0.16 0.0 M 0.0 M
2/26/2012 7:00 AM 0.00 0.0 M 0.0 M
2/27/2012 7:00 AM 0.00 0.0 M 0.0 M
2/28/2012 7:00 AM 0.00 0.0 M 0.0 M
2/29/2012 7:00 AM 0.00 0.0 M 0.0 M
3/1/2012 7:00 AM 1.65 0.0 M 0.0 M
3/2/2012 7:00 AM 0.00 0.0 M 0.0 M
3/3/2012 7:00 AM 0.89 0.0 M 0.0 M Rain began yesterday afternoon (3/2) .19 by 10PM. TRW around 11PM. Light rain at obs time.
3/5/2012 7:00 AM 0.00 0.0 M 0.0 M Virga snow but none reached the ground -- Yesterday afternoon.
3/8/2012 7:00 AM 0.00 0.0 M 0.0 M
3/9/2012 7:00 AM 0.05 0.0 M 0.0 M
3/13/2012 7:00 AM 0.01 0.0 M 0.0 M
3/14/2012 7:00 AM 0.00 0.0 M 0.0 M
3/20/2012 7:00 AM 1.10 0.0 M 0.0 M Thunderstorm Early AM.... especially around 6AM with several strikes within 1000 feet of the observing location.
3/21/2012 7:00 AM 0.01 0.0 M 0.0 M
3/22/2012 7:00 AM 0.00 0.0 M 0.0 M
3/23/2012 7:00 AM 0.00 0.0 M 0.0 M
3/25/2012 7:45 AM 0.36 0.0 M 0.0 M Gentle spring rain. .24 Noon-midnight 3/24 .08 Mid-7:45AM.
3/26/2012 7:00 AM 0.00 0.0 M 0.0 M
3/28/2012 7:00 AM 0.00 0.0 M 0.0 M
3/29/2012 7:00 AM 0.07 0.0 M 0.0 M Max 77 Showers in afternoon (3/28)
3/30/2012 7:00 AM 0.00 0.0 M 0.0 M
4/2/2012 7:00 AM 0.14 0.0 M 0.0 M
4/7/2012 7:00 AM 0.00 0.0 M M M
4/8/2012 7:00 AM 0.00 0.0 M 0.0 M
4/9/2012 7:00 AM 0.00 0.0 M 0.0 M
4/10/2012 7:00 AM 0.00 0.0 M 0.0 M
4/12/2012 7:00 AM 0.00 0.0 M M M
4/18/2012 7:00 AM 0.00 0.0 M 0.0 M
4/19/2012 7:00 AM 0.27 0.0 M 0.0 M
4/20/2012 7:00 AM 0.00 0.0 M 0.0 M
4/22/2012 8:00 AM 0.31 0.0 M 0.0 M Thunder Shower 6PM yesterday (4/21)
4/23/2012 7:00 AM 1.29 0.0 M 0.0 M Rail all day (4/22) tapering off to drizzle late at night and through the morning.
4/24/2012 7:00 AM 0.02 0.0 M 0.0 M
4/25/2012 7:00 AM 0.00 0.0 M 0.0 M
4/26/2012 7:00 AM T 0.0 M 0.0 M Drizzle at obs time
4/27/2012 7:00 AM 0.12 0.0 M 0.0 M Light Rain 4/26 7-11AM = .10 with an additional .02 sometime overnight.
5/2/2012 7:00 AM T M M M M Begining today through Sept. 30 I will be listing snow as N/A since snow probabilities are next to zero from May-Sept in the DC area.
5/9/2012 7:00 AM 0.27 M M M M
5/10/2012 7:00 AM 0.43 M M M M
5/11/2012 7:00 AM 0.00 0.0 M M M
5/14/2012 7:45 AM 0.06 M M M M
5/15/2012 7:00 AM 0.90 M M M M
5/16/2012 7:00 AM T M M M M
5/17/2012 7:00 AM 0.00 0.0 M M M
5/18/2012 7:00 AM 0.00 0.0 M M M
5/21/2012 7:15 AM 0.31 M M M M Rain began around 3:AM - Heavy showers around 6AM.
5/22/2012 7:00 AM 0.26 M M M M
5/23/2012 7:00 AM T M M M M
5/24/2012 7:00 AM 0.15 M M M M
5/25/2012 7:00 AM 0.01 M M M M
5/28/2012 7:00 AM 0.20 M M M M Quick moving Thundershower 8:50-930 PM last evening (5/27)
5/29/2012 7:00 AM 0.00 0.0 M M M
5/30/2012 7:00 AM 0.51 M M M M TRW 8:PM 5/29.
5/31/2012 7:00 AM 0.00 0.0 M M M
6/1/2012 7:00 AM 0.00 0.0 M M M
6/2/2012 7:00 AM 1.48 M M M M Thunderstorms yesterday (6/1) 4PM - midnight
6/3/2012 7:00 AM 0.00 0.0 M M M
6/4/2012 7:00 AM T M M M M Rain shower around Midnight 6/3-6/4.
6/5/2012 7:00 AM 0.00 0.0 M M M
6/6/2012 7:00 AM 0.00 0.0 M M M
6/7/2012 7:00 AM 0.02 M M M M Rain shower 8-9PM 6/6.
6/8/2012 7:00 AM T M M M M A few drops around 8PM from the anvil of a Cb to the northeast.
6/9/2012 7:00 AM 0.00 0.0 M M M
6/12/2012 7:30 AM 0.11 M M M M Raining at obs time.
6/13/2012 7:00 AM 0.30 M M M M
6/14/2012 7:00 AM 0.00 0.0 M M M
6/15/2012 7:00 AM 0.00 0.0 M M M
6/18/2012 7:00 AM 0.04 M M M M
6/19/2012 7:00 AM 0.03 M M M M Most rain from yesterday (6/18) but at least a trace occurred in the early morning prior to the obs time.
6/20/2012 7:00 AM 0.00 0.0 M M M
6/21/2012 7:00 AM 0.00 0.0 M M M
6/22/2012 7:00 AM 0.00 0.0 M M M
6/23/2012 7:00 AM 0.19 M M M M
6/27/2012 7:00 AM 0.00 0.0 M M M
6/28/2012 7:00 AM 0.00 0.0 M M M
6/29/2012 7:00 AM 0.00 0.0 M M M
6/30/2012 7:00 AM 0.72 M M M M Power out... finally got to work to report the obs... a bit late for sure. Tree down blocking road to my house. No damage on my property at least... strong winds in brief storm.
7/1/2012 7:00 AM 0.00 0.0 M M M
7/2/2012 7:00 AM 0.18 M M M M Early morning thunder shower (about 3AM? 7/2)
7/3/2012 7:00 AM 0.00 0.0 M M M
7/4/2012 7:00 AM 0.03 M M M M Shower at 9PM. Lightning visible, but I didn't hear thunder.
7/5/2012 7:00 AM 0.00 0.0 M M M
7/9/2012 7:00 AM 0.14 M M M M
7/10/2012 7:00 AM 0.12 M M M M
7/11/2012 7:00 AM 0.00 0.0 M M M
7/12/2012 7:00 AM 0.00 0.0 M M M
7/13/2012 7:20 AM T M M M M Sprinkling at obs time.
7/14/2012 7:00 AM 0.36 M M M M Thunderstorm with light rain in progress at obs time. Occasional heavy rain just prior to 7AM obs time.
7/16/2012 7:00 AM 0.07 M M M M .03 in TRW 7/15 6PM. .04 in showers overnight.
7/19/2012 7:00 AM 0.05 M M M M
7/20/2012 7:00 AM 1.18 M M M M TRW + with lots of lightning, not much wind 9:30-midnight 7/19.
7/24/2012 7:00 AM 0.00 0.0 M M M
7/25/2012 7:00 AM 0.02 M M M M
7/26/2012 7:00 AM 0.00 0.0 M M M
7/27/2012 7:00 AM T M M M M
8/8/2012 7:00 AM 0.00 0.0 M M M
8/10/2012 7:15 AM 1.97 M M M M TRW last evening 7-10PM - power out 8PM-Midnight. Very heavy rain 6AM-7AM.
8/11/2012 7:00 AM 0.26 M M M M
8/12/2012 7:00 AM 0.01 M M M M
8/13/2012 7:00 AM 0.00 0.0 M M M
8/14/2012 7:00 AM 0.06 M M M M
8/15/2012 7:00 AM 0.02 M M M M
8/16/2012 7:00 AM 0.00 0.0 M M M
8/17/2012 7:00 AM 0.00 0.0 M M M
8/18/2012 7:00 AM 0.31 M M M M One distant lightning strike/thunder 8PM 8/17
8/20/2012 7:00 AM 0.06 M M M M Some light rain yesterday (8/19) 2-4 PM
8/21/2012 7:00 AM 0.61 M M M M Heavy Rain 6:30-8 PM 8/20 but I didn't hear any thunder or see lightning.
8/23/2012 7:00 AM 0.11 M M M M TRW 7PM 8/22.
8/24/2012 7:00 AM 0.00 0.0 M M M
8/25/2012 7:00 AM 0.00 0.0 M M M
8/26/2012 7:00 AM T M M M M
8/27/2012 7:00 AM 0.31 M M M M Showers with sparse thunder 8/26, 4-6 PM.
8/28/2012 7:30 AM 0.03 M M M M Rain showers around 6-7AM 8/28
8/29/2012 7:00 AM 0.00 0.0 M M M
9/2/2012 7:00 AM 0.09 M M M M Rather strange thundershower last night from about 8:30PM - 10PM. Only a few lightning strikes, but some very close. Only one brief period of heavy rain that lasted maybe 5 minutes or so, with lighter rain lingering a bit longer.
9/3/2012 7:00 AM 0.06 M M M M A few light rain showers yesterday (9/2) afternoon and evening
9/4/2012 7:00 AM 0.02 M M M M
9/5/2012 7:00 AM 0.00 0.0 M M M
9/7/2012 7:00 AM 0.06 M M M M
9/9/2012 7:00 AM 0.55 M M M M Trw with lots of wind yesterday at around 5:30 PM (9/8)
9/10/2012 7:00 AM 0.00 0.0 M M M
9/11/2012 7:00 AM 0.00 0.0 M M M
9/12/2012 7:00 AM 0.00 0.0 M M M
9/15/2012 7:00 AM 0.00 0.0 M M M
9/16/2012 7:00 AM 0.00 0.0 M M M
9/17/2012 7:00 AM 0.00 0.0 M M M
9/18/2012 7:20 AM 0.21 M M M M
9/19/2012 7:00 AM 0.99 M M M M Heavy rain - .95 yesterday afternoon (9/18). Showers overnight at around 11 PM.
9/23/2012 7:00 AM 0.02 M M M M Showers Yesterday (9/22) around sunset. Rainbow observed.
9/24/2012 7:00 AM 0.00 0.0 M M M
9/25/2012 7:00 AM 0.00 0.0 M M M
9/26/2012 7:00 AM 0.10 M M M M Early AM shower (9/26)
9/27/2012 7:00 AM 0.02 M M M M Rain shower around midnight (9/26-9/27)
9/28/2012 7:00 AM 0.50 M M M M Thundershowers last night 9/27 8-11 PM. (.18) Light rain in the early AM hours of 9/28 - .32.
9/29/2012 7:00 AM 0.00 0.0 M M M



Start Date End Date & Time Duration in Days Precipitation Snow Depth Snow Depth SWE Notes
4/28/2012 5/01/2012 7:00 AM 4 0.31 M M
7/21/2012 7/23/2012 7:00 AM 3 1.56 M M



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