Station Overview Station Location
Station Number MD-PG-33 Latitude 39.0694
Station Name Laurel 2.0 S Longitude -76.8575
County Prince George's Elevation (ft) 194



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 10 3.63 4.75 31 4.75 31 0.00 0 0 11 2 0.0 0 0
Nov 10 3.61 2.13 22 2.13 22 0.00 0 0 4 1 0.0 0 0
Dec 10 3.38 0.13 8 0.13 8 0.00 0 0 1 0 1.4 1 2
Jan 11 3.07 2.48 31 2.48 31 0.00 0 0 11 3 10.4 8 9
Feb 11 2.85 2.26 28 2.26 28 0.00 0 0 12 0 1.5 2 13
March 11 3.87 4.65 31 4.65 31 0.00 0 0 12 1 0.0 0 0
April 11 3.48 3.42 29 3.42 29 0.00 0 0 15 2 0.0 0 0
May 11 4.43 2.01 27 2.01 27 0.00 0 0 12 2 0.0 0 0
June 11 3.83 2.31 30 2.31 30 0.00 0 0 9 4 0.0 0 0
July 11 4.10 4.37 31 4.37 31 0.00 0 0 6 3 0.0 0 0
Aug 11 3.29 10.88 31 10.88 31 0.00 0 0 12 0 0.0 0 0
Sept 11 4.08 10.80 30 10.80 30 0.00 0 0 15 4 0.0 0 0
Water Year Totals: 43.62" 50.19" 329 days 50.19" 329 0.00" 0 days 0 120 days 22 days 13.3" 11 days 24 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
10/1/2010 2.11
10/2/2010 0.00
10/3/2010 0.00
10/4/2010 0.58
10/5/2010 0.18
10/6/2010 0.00
10/7/2010 T
10/8/2010 0.00
10/9/2010 0.00
10/10/2010 0.00
10/11/2010 0.00
10/12/2010 0.03
10/13/2010 0.00
10/14/2010 T
10/15/2010 0.92
10/16/2010 0.00
10/17/2010 0.00
10/18/2010 0.00
10/19/2010 0.05
10/20/2010 0.01
10/21/2010 0.02
10/22/2010 0.00
10/23/2010 0.00
10/24/2010 0.00
10/25/2010 0.00
10/26/2010 0.01
10/27/2010 0.49
10/28/2010 0.35
10/29/2010 0.00
10/30/2010 0.00
10/31/2010 0.00
11/1/2010 0.00
11/2/2010 0.00
11/3/2010 0.00
11/4/2010 0.51
11/5/2010 0.77
11/6/2010 0.00
11/7/2010 0.00
11/8/2010 0.00
11/9/2010 0.00
11/10/2010 0.00
11/11/2010 0.00
11/12/2010 0.00
11/13/2010 0.00
11/14/2010 0.00
11/15/2010 0.00
11/16/2010 0.22
11/17/2010 0.63
11/18/2010 0.00
11/19/2010 0.00
11/20/2010 0.00
11/21/2010 0.00
11/22/2010 T
11/23/2010
11/24/2010
11/25/2010
11/26/2010
11/27/2010
11/28/2010
11/29/2010
11/30/2010
12/1/2010
12/2/2010
12/3/2010
12/4/2010
12/5/2010
12/6/2010
12/7/2010
12/8/2010
12/9/2010
12/10/2010
12/11/2010
12/12/2010
12/13/2010
12/14/2010
12/15/2010
12/16/2010
12/17/2010 0.13
12/18/2010 0.00
12/19/2010 0.00
12/20/2010 0.00
12/21/2010 0.00
12/22/2010 0.00
12/23/2010 0.00
12/24/2010 0.00
12/25/2010
12/26/2010
12/27/2010
12/28/2010
12/29/2010
12/30/2010
12/31/2010
Day of YearDaily PrcpMultiday Prcp
1/1/2011 0.00
1/2/2011 0.01
1/3/2011 0.06
1/4/2011 0.00
1/5/2011 0.00
1/6/2011 0.00
1/7/2011 0.01
1/8/2011 T
1/9/2011 0.01
1/10/2011 0.00
1/11/2011 0.00
1/12/2011 0.18
1/13/2011 0.00
1/14/2011 0.00
1/15/2011 0.00
1/16/2011 0.00
1/17/2011 0.00
1/18/2011 0.47
1/19/2011 0.04
1/20/2011 0.00
1/21/2011 0.04
1/22/2011 T
1/23/2011 0.00
1/24/2011 0.00
1/25/2011 0.00
1/26/2011 0.28
1/27/2011 1.29
1/28/2011 0.00
1/29/2011 0.09
1/30/2011 T
1/31/2011 0.00
2/1/2011 0.01
2/2/2011 0.86
2/3/2011 0.01
2/4/2011 0.00
2/5/2011 0.09
2/6/2011 0.19
2/7/2011 0.00
2/8/2011 0.02
2/9/2011 0.00
2/10/2011 0.01
2/11/2011 0.00
2/12/2011 0.00
2/13/2011 0.00
2/14/2011 0.00
2/15/2011 0.00
2/16/2011 0.00
2/17/2011 0.00
2/18/2011 0.00
2/19/2011 0.00
2/20/2011 0.05
2/21/2011 0.36
2/22/2011 0.00
2/23/2011 0.00
2/24/2011 0.00
2/25/2011 0.23
2/26/2011 0.23
2/27/2011 0.00
2/28/2011 0.20
3/1/2011 0.46
3/2/2011 0.00
3/3/2011 0.00
3/4/2011 0.00
3/5/2011 0.00
3/6/2011 0.06
3/7/2011 1.05
3/8/2011 0.00
3/9/2011 0.00
3/10/2011 0.51
3/11/2011 1.31
3/12/2011 0.00
3/13/2011 0.00
3/14/2011 0.00
3/15/2011 0.00
3/16/2011 0.56
3/17/2011 0.00
3/18/2011 0.00
3/19/2011 0.00
3/20/2011 0.00
3/21/2011 0.23
3/22/2011 0.02
3/23/2011 0.03
3/24/2011 0.22
3/25/2011 0.03
3/26/2011 0.00
3/27/2011 T
3/28/2011 0.00
3/29/2011 0.00
3/30/2011 0.00
3/31/2011 0.17
Day of YearDaily PrcpMultiday Prcp
4/1/2011 0.23
4/2/2011 0.00
4/3/2011 0.07
4/4/2011 0.04
4/5/2011 0.29
4/6/2011 0.15
4/7/2011 0.00
4/8/2011 0.02
4/9/2011 0.42
4/10/2011 T
4/11/2011 0.00
4/12/2011 0.00
4/13/2011 0.54
4/14/2011 0.08
4/15/2011 0.00
4/16/2011
4/17/2011 0.83
4/18/2011 0.00
4/19/2011 0.00
4/20/2011 0.05
4/21/2011 0.00
4/22/2011 0.00
4/23/2011 0.50
4/24/2011 0.01
4/25/2011 0.14
4/26/2011 0.00
4/27/2011 T
4/28/2011 0.00
4/29/2011 0.05
4/30/2011 0.00
5/1/2011 0.00
5/2/2011 0.06
5/3/2011 0.00
5/4/2011 0.40
5/5/2011 0.16
5/6/2011 0.00
5/7/2011 0.17
5/8/2011 0.00
5/9/2011 0.00
5/10/2011 0.00
5/11/2011 0.00
5/12/2011 0.00
5/13/2011 0.00
5/14/2011 T
5/15/2011 0.46
5/16/2011 0.04
5/17/2011 0.11
5/18/2011 0.05
5/19/2011 0.24
5/20/2011 0.24
5/21/2011 0.00
5/22/2011 0.00
5/23/2011 0.03
5/24/2011 T
5/25/2011
5/26/2011
5/27/2011
5/28/2011 0.05
5/29/2011
5/30/2011 0.00
5/31/2011 0.00
6/1/2011 0.00
6/2/2011 0.00
6/3/2011 0.00
6/4/2011 0.00
6/5/2011 T
6/6/2011 0.00
6/7/2011 0.00
6/8/2011 0.00
6/9/2011 0.00
6/10/2011 0.01
6/11/2011 0.10
6/12/2011 0.00
6/13/2011 0.05
6/14/2011 0.00
6/15/2011 0.00
6/16/2011 T
6/17/2011 1.07
6/18/2011 0.28
6/19/2011 T
6/20/2011 0.19
6/21/2011 0.07
6/22/2011 0.01
6/23/2011 0.00
6/24/2011 0.00
6/25/2011 0.00
6/26/2011 0.00
6/27/2011 T
6/28/2011 0.00
6/29/2011 0.53
6/30/2011 0.00
Day of YearDaily PrcpMultiday Prcp
7/1/2011 0.00
7/2/2011 0.00
7/3/2011 0.39
7/4/2011 0.03
7/5/2011 0.00
7/6/2011 0.00
7/7/2011 0.00
7/8/2011 T
7/9/2011 1.31
7/10/2011 0.00
7/11/2011 0.00
7/12/2011 0.11
7/13/2011 0.00
7/14/2011 0.58
7/15/2011 0.00
7/16/2011 0.00
7/17/2011 0.00
7/18/2011 0.00
7/19/2011 0.00
7/20/2011 T
7/21/2011 0.00
7/22/2011 0.00
7/23/2011 0.00
7/24/2011 0.00
7/25/2011 T
7/26/2011 1.95
7/27/2011 0.00
7/28/2011 0.00
7/29/2011 0.00
7/30/2011 0.00
7/31/2011 0.00
8/1/2011 0.00
8/2/2011 0.36
8/3/2011 0.00
8/4/2011 0.13
8/5/2011 0.00
8/6/2011 0.00
8/7/2011 0.95
8/8/2011 0.24
8/9/2011 0.00
8/10/2011 0.00
8/11/2011 0.00
8/12/2011 0.00
8/13/2011 0.00
8/14/2011 0.33
8/15/2011 2.70
8/16/2011 0.03
8/17/2011 0.00
8/18/2011 0.00
8/19/2011 0.82
8/20/2011 0.00
8/21/2011 0.00
8/22/2011 1.19
8/23/2011 0.00
8/24/2011 0.00
8/25/2011 0.00
8/26/2011 0.60
8/27/2011 0.00
8/28/2011 3.44
8/29/2011 0.09
8/30/2011 0.00
8/31/2011 0.00
9/1/2011 0.00
9/2/2011 0.14
9/3/2011 0.00
9/4/2011 T
9/5/2011 0.00
9/6/2011 1.32
9/7/2011 0.81
9/8/2011 4.63
9/9/2011 0.78
9/10/2011 0.15
9/11/2011 0.00
9/12/2011 0.02
9/13/2011 0.00
9/14/2011 0.00
9/15/2011 T
9/16/2011 0.07
9/17/2011 0.00
9/18/2011 T
9/19/2011 0.00
9/20/2011 T
9/21/2011 0.11
9/22/2011 0.02
9/23/2011 0.06
9/24/2011 1.33
9/25/2011 0.00
9/26/2011 0.00
9/27/2011 0.03
9/28/2011 0.01
9/29/2011 1.32
9/30/2011 0.00



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
10/1/2010 8:00 AM 2.11 M M M M periods of rain Thursday morning tapered off during the afternoon; rain developed again around sunset and became heavy during the evening before ending around 1AM. event total: 4.43"
10/2/2010 7:00 AM 0.00 0.0 M M M
10/3/2010 7:00 AM 0.00 0.0 M M M
10/4/2010 8:00 AM 0.58 M M M M rain developed late Sunday afternoon and lasted throughout the night
10/5/2010 8:00 AM 0.18 M M M M periods of rain Monday morning tapered off quickly during the afternoon
10/6/2010 7:00 AM 0.00 0.0 M M M
10/7/2010 8:00 AM T M M M M grazed by some evening showers
10/8/2010 7:00 AM 0.00 0.0 M M M
10/9/2010 7:00 AM 0.00 0.0 M M M
10/10/2010 7:00 AM 0.00 0.0 M M M
10/11/2010 7:00 AM 0.00 0.0 M M M
10/12/2010 8:00 AM 0.03 M M M M showers and thunderstorms developed in the vicinity around 8PM with some lightning and a few drops. one core finally moved overhead around 9:30 with a quick downpour accompanied by occasional but vivid lightning and some loud crashes of thunder
10/13/2010 7:00 AM 0.00 0.0 M M M
10/14/2010 8:00 AM T M M M M light rain started falling just prior to observation time
10/15/2010 8:00 AM 0.92 M M M M heavy rain in the morning Thursday followed by a letup in the late morning with more heavy raiin between noon and 2PM before tapering off soon after.
10/16/2010 7:00 AM 0.00 0.0 M M M
10/17/2010 7:00 AM 0.00 0.0 M M M
10/18/2010 7:00 AM 0.00 0.0 M M M
10/19/2010 8:00 AM 0.05 M M M M overnight showers; light showers falling at time of observation
10/20/2010 8:00 AM 0.01 M M M M light showers right at the start of the accumulation period
10/21/2010 8:00 AM 0.02 M M M M period of light rain Wednesday afternoon
10/22/2010 7:00 AM 0.00 0.0 M M M
10/23/2010 7:00 AM 0.00 0.0 M M M
10/24/2010 7:00 AM 0.00 0.0 M M M
10/25/2010 7:00 AM 0.00 0.0 M M M
10/26/2010 8:00 AM 0.01 M M M M brief shower Monday afternoon
10/27/2010 8:00 AM 0.49 M M M M trace of precip just before midnight followed by heavier showers later at night
10/28/2010 7:00 AM 0.35 M M M M early afternoon heavy thunderstorm followed by another shower around 4PM
10/29/2010 7:00 AM 0.00 0.0 M M M
10/30/2010 7:00 AM 0.00 0.0 M M M
10/31/2010 7:00 AM 0.00 0.0 M M M
11/1/2010 7:00 AM 0.00 0.0 M M M
11/2/2010 7:00 AM 0.00 0.0 M M M
11/3/2010 7:00 AM 0.00 0.0 M M M
11/4/2010 8:00 AM 0.51 M M M M rain developed around 10PM and lasted through the night
11/5/2010 8:00 AM 0.77 M M M M rain throughout Wednesday tapered off during the afternoon with another period of light rain after midnight
11/6/2010 8:00 AM 0.00 0.0 M M M
11/7/2010 7:00 AM 0.00 0.0 M M M
11/8/2010 7:00 AM 0.00 0.0 M M M
11/9/2010 7:00 AM 0.00 0.0 M M M
11/10/2010 7:00 AM 0.00 0.0 M M M
11/11/2010 7:00 AM 0.00 0.0 M M M
11/12/2010 7:00 AM 0.00 0.0 M M M
11/13/2010 7:00 AM 0.00 0.0 M M M
11/14/2010 7:00 AM 0.00 0.0 M M M
11/15/2010 7:00 AM 0.00 0.0 M M M
11/16/2010 8:00 AM 0.22 M M M M light rain developed during the late evening
11/17/2010 8:00 AM 0.63 M M M M periods of showers during Tuesday. line of heavy thunderstorms arrived around 1AM with winds gusting 40-45 kt. strongest winds occurred after the precip had commenced - not the classic gust front scenario.
11/18/2010 7:00 AM 0.00 0.0 M M M
11/19/2010 7:00 AM 0.00 0.0 M M M
11/20/2010 7:00 AM 0.00 0.0 M M M
11/21/2010 7:00 AM 0.00 0.0 M M M
11/22/2010 8:00 AM T M M M M dense fog this morning. everything was quite wet, so it appears that some drizzle fell as well.
12/17/2010 8:00 AM 0.13 1.4 M 1.0 M light snow began mid-morning Thursday and ended by early evening
12/18/2010 8:00 AM 0.00 0.0 M 0.5 M
12/19/2010 8:00 AM 0.00 0.0 M T M
12/20/2010 8:00 AM 0.00 0.0 M T M
12/21/2010 8:00 AM 0.00 0.0 M T M
12/22/2010 8:00 AM 0.00 0.0 M T M
12/23/2010 8:00 AM 0.00 0.0 M T M
12/24/2010 8:00 AM 0.00 0.0 M T M
1/1/2011 7:00 AM 0.00 0.0 M M M
1/2/2011 8:00 AM 0.01 M M M M a few showers Saturday evening and again early Sunday
1/3/2011 8:00 AM 0.06 M M M M periods of showers during Sunday with the heaviest in the early afternoon
1/4/2011 7:00 AM 0.00 0.0 M M M
1/5/2011 7:00 AM 0.00 0.0 M M M
1/6/2011 7:00 AM 0.00 0.0 M M M
1/7/2011 8:00 AM 0.01 0.1 M T M light covering of snow early this morning
1/8/2011 8:00 AM T T M T M very, very light dusting early this morning
1/9/2011 8:00 AM 0.01 0.2 M T M period of light snow Saturday morning
1/10/2011 7:00 AM 0.00 0.0 M M M
1/11/2011 7:00 AM 0.00 0.0 M M M
1/12/2011 8:00 AM 0.18 1.9 M 1.5 M brief snow shower Tuesday afternoon followed by late afternoon and early evening freezing drizzle. snow developed by 7PM with occasional moderate snow through 11PM.
1/13/2011 8:00 AM 0.00 0.0 M 1.0 M
1/14/2011 7:00 AM 0.00 0.0 M M M
1/15/2011 7:00 AM 0.00 0.0 M M M
1/16/2011 8:00 AM 0.00 0.0 M T M
1/17/2011 8:00 AM 0.00 0.0 M T M
1/18/2011 8:00 AM 0.47 0.5 M 0.5 M brief period of snow Monday evening quickly turned to sleet and finally freezing rain by midnight with nice overnight glaze
1/19/2011 8:00 AM 0.04 M M M M period of light rain overnight
1/20/2011 7:00 AM 0.00 0.0 M M M
1/21/2011 8:00 AM 0.04 0.1 M T M mixture of sleet, rain, and wet snow started just after midnight and turned to all snow. dusting on ground this morning
1/22/2011 8:00 AM T T M 0.0 M brief snow flurry Friday mid-morning
1/23/2011 7:00 AM 0.00 0.0 M M M
1/24/2011 7:00 AM 0.00 0.0 M M M
1/25/2011 7:00 AM 0.00 0.0 M M M
1/26/2011 8:00 AM 0.28 1.4 M 1.0 M mixture of snow and sleet developed towards morning
1/27/2011 8:00 AM 1.29 6.1 M 7.0 M rain and sleet changed to a heavy wet snow during the late afternoon which lasted through the evening with a few claps of thunder
1/28/2011 8:00 AM 0.00 0.0 M 5.5 M
1/29/2011 8:00 AM 0.09 0.1 M 5.0 M period of light wet snow around midday Friday for the most part melted on contact with the relatively warm ground but accumulated a little on already snow-covered surfaces
1/30/2011 8:00 AM T T M 4.5 M a few brief snow flurries Saturday afternoon
1/31/2011 8:00 AM 0.00 0.0 M 3.0 M
2/1/2011 8:00 AM 0.01 T M 2.5 M brief period of very light snow/sleet Monday evening; freezing drizzle developed late at night and is still falling at time of ob. very light coating of ice on all surfaces
2/2/2011 8:00 AM 0.86 0.0 M 3.5 M early morning freezing drizzle. rain developed during the late evening and continued overnight
2/3/2011 8:00 AM 0.01 0.0 M 3.0 M leftover drizzle
2/4/2011 8:00 AM 0.00 0.0 M 2.5 M
2/5/2011 8:00 AM 0.09 0.0 M 2.0 M light rain developed after midnight
2/6/2011 8:00 AM 0.19 0.0 M 1.0 M periods of light rain and drizzle during Saturday
2/7/2011 8:00 AM 0.00 0.0 M 1.0 M
2/8/2011 8:00 AM 0.02 0.0 M 0.5 M few light showers overnight
2/9/2011 8:00 AM 0.00 0.0 M 0.5 M
2/10/2011 8:00 AM 0.01 0.1 M 0.5 M period of light snow Wednesday eveninig
2/11/2011 8:00 AM 0.00 0.0 M T M
2/12/2011 8:00 AM 0.00 0.0 M T M
2/13/2011 8:00 AM 0.00 0.0 M T M
2/14/2011 8:00 AM 0.00 0.0 M 0.0 M
2/15/2011 8:00 AM 0.00 0.0 M 0.0 M
2/16/2011 7:00 AM 0.00 0.0 M M M
2/17/2011 7:00 AM 0.00 0.0 M M M
2/18/2011 7:00 AM 0.00 0.0 M M M
2/19/2011 8:00 AM 0.00 0.0 M M M
2/20/2011 8:00 AM 0.05 M M M M period of light rain Sunday evening
2/21/2011 8:00 AM 0.36 1.4 M 1.0 M period of showers Monday afternoon with a little sleet mixed in. precip redeveloped towards evenine - started as rain then mixed with sleet and continued as mostly sleet through around midnight. snow mixed in around midnight and turned to all snow shortly after
2/22/2011 8:00 AM 0.00 0.0 M 1.0 M
2/23/2011 8:00 AM 0.00 0.0 M 0.5 M
2/24/2011 8:00 AM 0.00 0.0 M T M
2/25/2011 8:00 AM 0.23 M M M M periods of rain developed late Thursday afternoon and lasted on and off during the night
2/26/2011 8:00 AM 0.23 M M M M period of showers mid-morning Friday; band of heavy showers with gusty winds and a little thunder moved through between 1:30 and 2PM. intense winds followed the passage of the cold front a little while later
2/27/2011 7:00 AM 0.00 0.0 M M M
2/28/2011 8:00 AM 0.20 M M M M showers developed just after midnight; observed some lightning to the west and southwest around 12:30 and may have heard some thunder as those cells moved east but am not sure
3/1/2011 8:00 AM 0.46 M M M M outflow from dying line of convection arrived late morning with gusty winds - new cells formed behind it and moved overheard around noon with a heavier downpour and one distant rumber of thunder. periods of light to moderate rain persisted through the afternoon with a final round of showers during the evening along the cold front
3/2/2011 7:00 AM 0.00 0.0 M M M
3/3/2011 7:00 AM 0.00 0.0 M M M
3/4/2011 7:00 AM 0.00 0.0 M M M
3/5/2011 7:00 AM 0.00 0.0 M M M
3/6/2011 8:00 AM 0.06 M M M M light rain began before dawn
3/7/2011 8:00 AM 1.05 T M 0.0 M periods of rain throughout the day; period of particularly heavy rain fell between 3 and 6PM with another round of heavy rain around 10PM. precip mixed with sleet and then changed to snow just after midnight before ending just after 1AM.
3/8/2011 7:00 AM 0.00 0.0 M M M
3/9/2011 7:00 AM 0.00 0.0 M M M
3/10/2011 8:00 AM 0.51 M M M M periods of rain developed late Wednesday evening and continued through the night with heavier rain towards morning
3/11/2011 8:00 AM 1.31 M M M M periods of heavier showers throughout the day with the last light showers ending after midnight
3/12/2011 7:00 AM 0.00 0.0 M M M
3/13/2011 7:00 AM 0.00 0.0 M M M
3/14/2011 7:00 AM 0.00 0.0 M M M
3/15/2011 7:00 AM 0.00 0.0 M M M
3/16/2011 8:00 AM 0.56 M M M M 1st period of rain during the late evening followed by a break; heaviest rain fell between 12:45 and 1:30 AM
3/17/2011 7:00 AM 0.00 0.0 M M M
3/18/2011 7:00 AM 0.00 0.0 M M M
3/19/2011 7:00 AM 0.00 0.0 M M M
3/20/2011 7:00 AM 0.00 0.0 M M M
3/21/2011 8:00 AM 0.23 M M M M early morning warm front convection. cell out ahead of main line moved ahead around 6AM with several crashes of thunder and a brief downpour. main line arrived about 50 minutes later with more lightning and thunder and another brief downpour followed by a trailing stratiform region. No hail was observed, and radar suggested that the hail core passed a few miles to the south.
3/22/2011 8:00 AM 0.02 M M M M rain ended soon after yesterday's observation
3/23/2011 8:00 AM 0.03 M M M M light rain developed after midnight
3/24/2011 8:00 AM 0.22 M M M M periods of drizzle during the day and then a round of heavy thunderstorms during the evening
3/25/2011 8:00 AM 0.03 M M M M period of showers just after previous day's observation
3/26/2011 8:00 AM 0.00 0.0 M M M
3/27/2011 8:00 AM T T M M M brief period of light snow before sunrise. no accumulation
3/28/2011 7:00 AM 0.00 0.0 M M M
3/29/2011 7:00 AM 0.00 0.0 M M M
3/30/2011 7:00 AM 0.00 0.0 M M M
3/31/2011 8:00 AM 0.17 T M 0.0 M rain with occasional sleet pellets developed Wednesday afternoon and went on and off through the night
4/1/2011 8:00 AM 0.23 T M 0.0 M 0.03" of light rain and drizzle during Thursday; band of heavier rain arrived around 1AM with lighter rain and a few wet snowflakes after that
4/2/2011 8:00 AM 0.00 0.0 M M M
4/3/2011 8:00 AM 0.07 M M M M first shower just after 8AM; heavier event in the early afternoon - was not home so not sure if any hail/graupel fell, although it seems likely based on other reports
4/4/2011 8:00 AM 0.04 M M M M brief thunderstorms between 8:30PM and 10PM followed by several hours of vivid lightning and rolling thunder from storms to the north. lightning was fantastic with many high-based cloud-to-ground strikes and even some "spider" lightning
4/5/2011 8:00 AM 0.29 M M M M heavy, gusty thunderstorm arrived just after 4:30 AM with winds probably up to 40 kt. some lighter showers after that
4/6/2011 8:00 AM 0.15 M M M M gusty heavy brief shower on the cold front around 8:30 AM with more showers for a few hours behind the front
4/7/2011 8:00 AM 0.00 0.0 M M M
4/8/2011 8:00 AM 0.02 0.0 M M M shower just prior to observation
4/9/2011 8:00 AM 0.42 M M M M periods of showers Friday afternoon and evening with lingering light rain and drizzle overnight (0.01" after midnight)
4/10/2011 8:00 AM T M M M M a little light rain and drizzle lingered past the previous day's observation
4/11/2011 8:00 AM 0.00 0.0 M M M
4/12/2011 8:00 AM 0.00 0.0 M M M some very distant lightning visible at sunset from the convection up in extreme northern MD; rain about to begin at time of observation
4/13/2011 8:00 AM 0.54 M M M M heavier morning shower and then more periods of light rain throughout the day and night
4/14/2011 8:00 AM 0.08 M M M M light rain and drizzle persisted until early afternoon
4/15/2011 8:00 AM 0.00 0.0 M M M
4/17/2011 8:00 AM 0.83 M M M M periods of showers with a few afternoon rumbles of thunder and a few brief heavier downpours. final round showers arrived just before 9PM with a torrential downpour
4/18/2011 7:00 AM 0.00 0.0 M M M
4/19/2011 7:00 AM 0.00 0.0 M M M
4/20/2011 8:00 AM 0.05 M M M M brief mid-morning thundershower with another brief shower mid-afternoon that mostly passed by to the north
4/21/2011 7:00 AM 0.00 0.0 M M M
4/22/2011 7:00 AM 0.00 0.0 M M M
4/23/2011 8:00 AM 0.50 M M M M periods of rain Friday through Friday night
4/24/2011 8:00 AM 0.01 M M M M leftover shower just after 8AM Saturday morning
4/25/2011 8:00 AM 0.14 M M M M brief gusty heavy thunderstorm during the late afternoon Sunday - no hail. cell passed just to the north around 7:30 with a couple of crashes of thunder but no rain. nice lightning show with a few rumbles of distant thunder (but no rain) through most of the evening as storms trained across the southern DC suburbs. finally, a couple of showers moved through (0.02") just after midnight
4/26/2011 7:00 AM 0.00 0.0 M M M
4/27/2011 8:00 AM T M M M M very, very light shower just after 7AM
4/28/2011 8:00 AM 0.00 0.0 M M M potentially tornadic supercells passed well to my southeast and northwest during the early evening. A second batch of storms passed just to the west around 11PM with lots of lightning and some moderately loud thunder.
4/29/2011 8:00 AM 0.05 M M M M non-descript batch of showers with some distant thunder moved through during the mid-morning
4/30/2011 7:00 AM 0.00 0.0 M M M
5/1/2011 7:00 AM 0.00 0.0 M M M
5/2/2011 8:00 AM 0.06 M M M M periods of light showers/light rain Sunday afternoon into the early evening
5/3/2011 7:00 AM 0.00 0.0 M M M
5/4/2011 8:00 AM 0.40 M M M M brief shower along cold front around 10PM. steadier rain developed after midnight - still raining at time of observation
5/5/2011 8:00 AM 0.16 M M M M rain during the morning ended just before noon. brief moderate shower around 7PM (0.01")
5/6/2011 7:00 AM 0.00 0.0 M M M
5/7/2011 8:00 AM 0.17 M M M M early evening thundershower
5/8/2011 7:00 AM 0.00 0.0 M M M
5/9/2011 7:00 AM 0.00 0.0 M M M
5/10/2011 7:00 AM 0.00 0.0 M M M
5/11/2011 7:00 AM 0.00 0.0 M M M
5/12/2011 7:00 AM 0.00 0.0 M M M
5/13/2011 7:00 AM 0.00 0.0 M M M
5/14/2011 8:00 AM T M M M M a little light rain and drizzle
5/15/2011 8:00 AM 0.46 M M M M MCS-type system with showery rains and occasional rumbles of thunder arrived from the south around 9:30PM and ended just after midnight
5/16/2011 8:00 AM 0.04 M M M M late afternoon thundershower
5/17/2011 8:00 AM 0.11 M M M M clipped by late afternoon band of thunderstorms that mostly stayed west and northwest (0.06); more pre-dawn showers
5/18/2011 8:00 AM 0.05 M M M M heavy showers mid-afternoon Tuesday missed this location by 1-2 miles to the north - extremely black sky. did receive a few very brief light showers. heavy shower at some point after midnight
5/19/2011 8:00 AM 0.24 M M M M heavier showers late morning Wednesday
5/20/2011 8:00 AM 0.24 M M M M heavier midday showers with a few distant rumbles of thunder; just missed a thundershower that passed north around 7:30PM; late evening heavier showers with a little thunder
5/21/2011 8:00 AM 0.00 0.0 M M M
5/22/2011 7:00 AM 0.00 0.0 M M M
5/23/2011 8:00 AM 0.03 M M M M early morning area of showers
5/24/2011 8:00 AM T M M M M dying shower moved through around 6PM
5/28/2011 8:00 AM 0.05 M M M M evening thunderstorm
5/30/2011 7:00 AM 0.00 0.0 M M M
5/31/2011 7:00 AM 0.00 0.0 M M M
6/1/2011 7:00 AM 0.00 0.0 M M M
6/2/2011 7:00 AM 0.00 0.0 M M M
6/3/2011 7:00 AM 0.00 0.0 M M M
6/4/2011 7:00 AM 0.00 0.0 M M M
6/5/2011 8:00 AM T M M M M couple of drops late at night
6/6/2011 8:00 AM 0.00 0.0 M M M lightning observed to the northeast just after midnight
6/7/2011 7:00 AM 0.00 0.0 M M M
6/8/2011 7:00 AM 0.00 0.0 M M M
6/9/2011 7:00 AM 0.00 0.0 M M M
6/10/2011 8:00 AM 0.01 M M M M intense early evening t-storm that hit Columbia passed just to my north with a good bit of thunder and lightning; was hit by the weak band of showers following this cluster; nice lightning show to the ESE around midnight with the cells that formed near Annapolis
6/11/2011 8:00 AM 0.10 M M M M noisy early evening thunderstorm. the radar echoes that appeared to pass over this location were fairly impressive, so the rain total was somewhat disappointing.
6/12/2011 8:00 AM 0.00 0.0 M M M another big disappointing miss
6/13/2011 8:00 AM 0.05 M M M M dying late afternoon thundershower
6/14/2011 7:00 AM 0.00 0.0 M M M
6/15/2011 7:00 AM 0.00 0.0 M M M
6/16/2011 8:00 AM T M M M M light shower began just before ob
6/17/2011 8:00 AM 1.07 M M M M light shower at start of period brought a train; period of heavy showers in the 5:30-6:30 period brought 0.29; heavy thunderstorms arrived around 11PM with lots of intense lightning and thunder. few leftover showers after midnight
6/18/2011 8:00 AM 0.28 M M M M 0.12 in t'storm around 4:45 PM; 0.01" in glancing t'storm around 7:30 PM; 0.15" in t'storm around 4:30 AM
6/19/2011 8:00 AM T M M M M few sprinkles
6/20/2011 8:00 AM 0.19 M M M M light rain developed after midnight; still raining at time of ob
6/21/2011 8:00 AM 0.07 M M M M 0.04 in lingering light rain Monday morning and another 0.03 in early morning showers today
6/22/2011 8:00 AM 0.01 M M M M dying thundershower in the late evening preceded by good lightning display; more lightning to the east and southeast just after midnight
6/23/2011 7:00 AM 0.00 0.0 M M M
6/24/2011 7:00 AM 0.00 0.0 M M M
6/25/2011 7:00 AM 0.00 0.0 M M M
6/26/2011 7:00 AM 0.00 0.0 M M M
6/27/2011 8:00 AM T M M M M couple of sprinkes late Sunday afternoon and a few more just after midnight
6/28/2011 7:00 AM 0.00 0.0 M M M
6/29/2011 8:00 AM 0.53 M M M M very heavy thunderstorm between 7:30 and 8:15 PM brought a much-needed soaking
6/30/2011 7:00 AM 0.00 0.0 M M M
7/1/2011 7:00 AM 0.00 0.0 M M M
7/2/2011 7:00 AM 0.00 0.0 M M M
7/3/2011 8:00 AM 0.39 M M M M early morning thundershowers
7/4/2011 8:00 AM 0.03 M M M M massive disappointment. late afternoon line segment approached, but the gust front surged ahead, and the line basically reformed just to my southeast, causing most of the precip to "jump" this location. just got a little bit of trailing stratiform but was treated to a lot of vivid lightning.
7/5/2011 7:00 AM 0.00 0.0 M M M
7/6/2011 7:00 AM 0.00 0.0 M M M
7/7/2011 7:00 AM 0.00 0.0 M M M
7/8/2011 8:00 AM T M M M M couple of sprinkles from an early evening shower that just missed my location
7/9/2011 8:00 AM 1.31 M M M M very heavy late afternoon thunderstorms followed by some trailing showers
7/10/2011 7:00 AM 0.00 0.0 M M M
7/11/2011 7:00 AM 0.00 0.0 M M M
7/12/2011 8:00 AM 0.11 M M M M gusty line of thunderstorms arrived just before 9PM, but it never really rained particularly hard
7/13/2011 7:00 AM 0.00 0.0 M M M
7/14/2011 8:00 AM 0.58 M M M M heavy mid-afternoon thunderstorms with some very healthy downpours and few wind gusts in the 25-30 kt range. the thunder and lightning was surprisingly unimpressive.
7/15/2011 7:00 AM 0.00 0.0 M M M
7/16/2011 7:00 AM 0.00 0.0 M M M
7/17/2011 7:00 AM 0.00 0.0 M M M
7/18/2011 7:00 AM 0.00 0.0 M M M
7/19/2011 7:00 AM 0.00 0.0 M M M
7/20/2011 8:00 AM T M M M M line of convection to the north brought a long period of thunder, but it fell apart while dropping south and gave only a brief light shower
7/21/2011 7:00 AM 0.00 0.0 M M M
7/22/2011 7:00 AM 0.00 0.0 M M M
7/23/2011 7:00 AM 0.00 0.0 M M M
7/24/2011 7:00 AM 0.00 0.0 M M M
7/25/2011 8:00 AM T M M M M couple of sprinkles yesterday evening as convection initiated to my east
7/26/2011 8:00 AM 1.95 M M M M two rounds of torrential thunderstorms Monday afternoon
7/27/2011 7:00 AM 0.00 0.0 M M M
7/28/2011 7:00 AM 0.00 0.0 M M M
7/29/2011 7:00 AM 0.00 0.0 M M M
7/30/2011 7:00 AM 0.00 0.0 M M M
7/31/2011 7:00 AM 0.00 0.0 M M M
8/1/2011 8:00 AM 0.00 0.0 M M M had nice outflow boundary from dying northern MD convection move through during the early evening
8/2/2011 8:00 AM 0.36 M M M M 0.35 from heavy early evening t-storm; got clipped by noisy storm around 10:30PM with 0.01
8/3/2011 7:00 AM 0.00 0.0 M M M
8/4/2011 8:00 AM 0.13 M M M M a few drops during the afternoon; steadier showers during the evening brought 0.05", and showers after midnight brought another 0.08"
8/5/2011 7:00 AM 0.00 0.0 M M M
8/6/2011 7:00 AM 0.00 0.0 M M M
8/7/2011 8:00 AM 0.95 M M M M couple of round of thunderstorms with intense rainfall falling between 7 and 7:30 PM
8/8/2011 8:00 AM 0.24 M M M M late afternoon thunderstorm
8/9/2011 7:00 AM 0.00 0.0 M M M
8/10/2011 7:00 AM 0.00 0.0 M M M
8/11/2011 7:00 AM 0.00 0.0 M M M
8/12/2011 7:00 AM 0.00 0.0 M M M
8/13/2011 7:00 AM 0.00 0.0 M M M
8/14/2011 8:00 AM 0.33 M M M M two periods of heavier showers with a little embedded thunder Saturday afternoon, but the most intense cores passed to the east. a little more rain around sunrise
8/15/2011 7:00 AM 2.70 M M M M several downpours Sunday morning (0.27"); intense t-storm developed just WSW of this location around 8PM providing a vivid lightning show but with precip core staying a slight distance away; this cell finally moved/developed ENE to this location around 9:30 and then merged with incoming line from west; torrential rain between 10PM and 10:45
8/16/2011 8:00 AM 0.03 M M M M several rounds of rumbling thunder throughout the day, but most of the precip cores either missed this location or fell apart as they approached
8/17/2011 7:00 AM 0.00 0.0 M M M
8/18/2011 7:00 AM 0.00 0.0 M M M
8/19/2011 8:00 AM 0.82 M M M M 3 distinct rounds of thunderstorms Thursday afternoon. The first developed overhead just after 3PM and really exploded to the east. Second was a line segment around 6PM with very heavy rain and a decent gust front. Best cell arrived around 6:45PM with more heavy rain and occasional hail stones, most the size of peas or chickpeas but with a few marbles mixed in too. one final shower after midnight. Mmmmm, chickpeas.
8/20/2011 8:00 AM 0.00 0.0 M M M lots of late afternoon and early evening thunder as storms developed just to my south and east. had a nice outflow boundary pass that brought gusty winds and refreshingly cool air
8/21/2011 7:00 AM 0.00 0.0 M M M
8/22/2011 8:00 AM 1.19 M M M M 2 impressive t-storm events Sunday. the first in the early afternoon was a cell moving northeast that brought lots of lightning strikes, gusty winds, and torrential rain. 2nd was a less impressive but still healthy line segment moving west to east.
8/23/2011 7:00 AM 0.00 0.0 M M M
8/24/2011 7:00 AM 0.00 0.0 M M M
8/25/2011 7:00 AM 0.00 0.0 M M M
8/26/2011 8:00 AM 0.60 M M M M several periods of showers and thundershowers Thursday afternoon
8/27/2011 7:00 AM 0.00 0.0 M M M
8/28/2011 8:00 AM 3.44 M M M M heavy rain and wind from Irene
8/29/2011 8:00 AM 0.09 M M M M last rainband from Irene persisted beyond previous observation; one final shower just after noon
8/30/2011 7:00 AM 0.00 0.0 M M M
8/31/2011 7:00 AM 0.00 0.0 M M M
9/1/2011 7:00 AM 0.00 0.0 M M M
9/2/2011 7:00 AM 0.14 M M M M brief shower Thursday afternoon for a trace; overnight showers with a few distant rumbles of thunder
9/3/2011 7:00 AM 0.00 0.0 M M M
9/4/2011 8:00 AM T M M M M unexpected t-storm complex moving SSW passed just to my west with several rumbles of thunder and a couple of drops
9/5/2011 7:00 AM 0.00 0.0 M M M
9/6/2011 8:00 AM 1.32 M M M M a few heavier showers Monday afternoon/evening; steady rain developed during the late evening with some very heavy rain, especially just on either side of midnight
9/7/2011 8:00 AM 0.81 M M M M several periods of rain during Tuesday and one period of very heavy showers just after midnight
9/8/2011 8:00 AM 4.63 M M M M periods of showers and thunderstorms with occasional torrential rainfall rates; 2.1" between Wednesday morning and mid-afternoon and then another 2.53" after dark
9/9/2011 8:00 AM 0.78 M M M M periods of rain Thursday night with some rumbles of thunder during the evening; some of the rain was moderate but nothing torrential
9/10/2011 8:00 AM 0.15 M M M M last band of showers moved through midday Friday
9/11/2011 7:00 AM 0.00 0.0 M M M
9/12/2011 8:00 AM 0.02 M M M M convection passed just to my north during the afternoon with a couple distant rumbles of thunder. finally had two brief showers during the late evening with some lightning visible well to the N/NNW
9/13/2011 7:00 AM 0.00 0.0 M M M
9/14/2011 7:00 AM 0.00 0.0 M M M
9/15/2011 8:00 AM T M M M M distant lightning visible to the west and northwest but only a couple of light drops
9/16/2011 8:00 AM 0.07 M M M M several bands of showers behind the sfc cold front Thursday afternoon; was treated to a fiery sunset with a full rainbow as the last band moved east.
9/17/2011 7:00 AM 0.00 0.0 M M M
9/18/2011 7:00 AM T M M M M a little bit of drizzle
9/19/2011 7:00 AM 0.00 0.0 M M M
9/20/2011 8:00 AM T M M M M showers arrived just prior to ob time
9/21/2011 8:00 AM 0.11 M M M M period of showers Tuesday morning and then some drizzle early Wednesday
9/22/2011 8:00 AM 0.02 M M M M period of light showers during the evening and then some light rain and drizzle towards morning
9/23/2011 8:00 AM 0.06 M M M M brief but intense downpour around 6AM
9/24/2011 8:00 AM 1.33 M M M M periods of rain Friday, occasionally heavy. nice rainbow at sunset
9/25/2011 7:00 AM 0.00 0.0 M M M
9/26/2011 7:00 AM 0.00 0.0 M M M
9/27/2011 8:00 AM 0.03 M M M M brief period of light rain yesterday morning
9/28/2011 8:00 AM 0.01 M M M M a little bit of morning light rain and drizzle
9/29/2011 8:00 AM 1.32 M M M M batch of heavy showers with a few rumbles of thunder arrived just after 8AM. 2nd line of heavy thunderstorms arrived just prior to 9PM.
9/30/2011 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



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
8/18/2011 6:45 PM 1/2" Grape 3/8" 1/4" Pea Size Mixed 15 3min no damage Intermittent True Same time as rain After smaller hail 10-20