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 09 3.63 6.69 31 6.69 31 0.00 0 0 13 1 0.0 0 0
Nov 09 3.61 4.74 30 4.74 30 0.00 0 0 12 4 0.0 0 0
Dec 09 3.38 7.63 31 6.09 29 1.54 2 1 10 0 2.3 2 7
Jan 10 3.07 2.29 31 2.29 31 0.00 0 0 10 3 8.7 4 5
Feb 10 2.85 4.40 28 0.75 24 3.65 4 2 5 3 6.0 3 23
March 10 3.87 5.06 31 5.06 31 0.00 0 0 15 1 0.0 0 3
April 10 3.48 2.09 30 2.09 30 0.00 0 0 7 0 0.0 0 0
May 10 4.43 3.56 31 3.56 31 0.00 0 0 12 3 0.0 0 0
June 10 3.83 2.23 30 2.23 30 0.00 0 0 8 3 0.0 0 0
July 10 4.10 3.52 31 3.52 31 0.00 0 0 9 1 0.0 0 0
Aug 10 3.29 7.67 31 7.67 31 0.00 0 0 12 1 0.0 0 0
Sept 10 4.08 4.70 30 4.70 30 0.00 0 0 7 0 0.0 0 0
Water Year Totals: 43.62" 54.58" 365 days 49.39" 359 5.19" 6 days 3 120 days 20 days 17.0" 9 days 38 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
10/1/2009 0.00
10/2/2009 0.00
10/3/2009 0.11
10/4/2009 0.00
10/5/2009 0.00
10/6/2009 0.00
10/7/2009 0.06
10/8/2009 0.00
10/9/2009 0.00
10/10/2009 0.03
10/11/2009 0.01
10/12/2009 0.00
10/13/2009 0.00
10/14/2009 0.00
10/15/2009 0.11
10/16/2009 0.71
10/17/2009 0.88
10/18/2009 1.91
10/19/2009 0.00
10/20/2009 0.00
10/21/2009 0.00
10/22/2009 0.00
10/23/2009 0.00
10/24/2009 0.02
10/25/2009 0.96
10/26/2009 0.00
10/27/2009 0.59
10/28/2009 1.28
10/29/2009 0.00
10/30/2009 T
10/31/2009 0.02
11/1/2009 0.41
11/2/2009 0.20
11/3/2009 0.00
11/4/2009 0.00
11/5/2009 T
11/6/2009 0.04
11/7/2009 0.00
11/8/2009 0.00
11/9/2009 0.00
11/10/2009 0.00
11/11/2009 0.12
11/12/2009 1.17
11/13/2009 0.24
11/14/2009 0.34
11/15/2009 T
11/16/2009 0.00
11/17/2009 0.00
11/18/2009 0.00
11/19/2009 0.01
11/20/2009 0.64
11/21/2009 0.00
11/22/2009 0.00
11/23/2009 0.00
11/24/2009 1.16
11/25/2009 0.21
11/26/2009 T
11/27/2009 0.20
11/28/2009 T
11/29/2009 0.00
11/30/2009 0.00
12/1/2009 0.25
12/2/2009 0.00
12/3/2009 0.94
12/4/2009 0.00
12/5/2009 0.04
12/6/2009 0.78
12/7/2009 0.00
12/8/2009 0.00
12/9/2009 1.61
12/10/2009 0.00
12/11/2009 0.00
12/12/2009 0.00
12/13/2009 0.04
12/14/2009 0.64
12/15/2009 0.00
12/16/2009 0.00
12/17/2009 0.00
12/18/2009 0.00
12/19/2009 **
12/20/2009 1.54
12/21/2009 0.00
12/22/2009 0.00
12/23/2009 0.00
12/24/2009 0.00
12/25/2009 0.00
12/26/2009 1.35
12/27/2009 0.20
12/28/2009 0.00
12/29/2009 0.00
12/30/2009 0.00
12/31/2009 0.24
Day of YearDaily PrcpMultiday Prcp
1/1/2010 0.23
1/2/2010 0.00
1/3/2010 0.00
1/4/2010 0.00
1/5/2010 T
1/6/2010 T
1/7/2010 0.00
1/8/2010 0.11
1/9/2010 0.00
1/10/2010 0.00
1/11/2010 0.00
1/12/2010 0.00
1/13/2010 0.00
1/14/2010 0.00
1/15/2010 0.00
1/16/2010 0.00
1/17/2010 0.02
1/18/2010 0.69
1/19/2010 0.00
1/20/2010 0.06
1/21/2010 0.00
1/22/2010 0.16
1/23/2010 T
1/24/2010 0.00
1/25/2010 0.51
1/26/2010 0.16
1/27/2010 0.02
1/28/2010 0.00
1/29/2010 0.00
1/30/2010 0.00
1/31/2010 0.33
2/1/2010 0.00
2/2/2010 0.00
2/3/2010 0.39
2/4/2010 0.00
2/5/2010 0.00
2/6/2010 **
2/7/2010 2.77
2/8/2010 0.00
2/9/2010 0.00
2/10/2010 **
2/11/2010 0.88
2/12/2010 0.00
2/13/2010 0.00
2/14/2010 0.00
2/15/2010 0.00
2/16/2010 0.05
2/17/2010 T
2/18/2010 T
2/19/2010 0.00
2/20/2010 0.00
2/21/2010 0.00
2/22/2010 0.00
2/23/2010 0.23
2/24/2010 0.00
2/25/2010 0.03
2/26/2010 T
2/27/2010 0.05
2/28/2010 0.00
3/1/2010 T
3/2/2010 0.00
3/3/2010 0.12
3/4/2010 0.01
3/5/2010 0.00
3/6/2010 0.00
3/7/2010 0.00
3/8/2010 0.00
3/9/2010 0.00
3/10/2010 0.00
3/11/2010 0.00
3/12/2010 0.66
3/13/2010 0.82
3/14/2010 1.45
3/15/2010 0.05
3/16/2010 0.06
3/17/2010 0.00
3/18/2010 0.00
3/19/2010 0.00
3/20/2010 0.00
3/21/2010 0.00
3/22/2010 0.02
3/23/2010 0.60
3/24/2010 0.01
3/25/2010 0.00
3/26/2010 0.20
3/27/2010 0.09
3/28/2010 0.00
3/29/2010 0.77
3/30/2010 0.13
3/31/2010 0.07
Day of YearDaily PrcpMultiday Prcp
4/1/2010 0.00
4/2/2010 0.00
4/3/2010 0.00
4/4/2010 0.00
4/5/2010 0.00
4/6/2010 0.00
4/7/2010 0.00
4/8/2010 0.00
4/9/2010 0.70
4/10/2010 0.00
4/11/2010 0.00
4/12/2010 0.00
4/13/2010 0.00
4/14/2010 0.16
4/15/2010 0.00
4/16/2010 0.00
4/17/2010 0.02
4/18/2010 0.00
4/19/2010 0.00
4/20/2010 0.00
4/21/2010 0.00
4/22/2010 0.40
4/23/2010 0.00
4/24/2010 0.00
4/25/2010 0.11
4/26/2010 0.65
4/27/2010 0.05
4/28/2010 0.00
4/29/2010 0.00
4/30/2010 0.00
5/1/2010 0.00
5/2/2010 T
5/3/2010 0.42
5/4/2010 0.05
5/5/2010 0.00
5/6/2010 0.00
5/7/2010 0.00
5/8/2010 0.00
5/9/2010 0.00
5/10/2010 0.00
5/11/2010 0.00
5/12/2010 0.24
5/13/2010 0.91
5/14/2010 T
5/15/2010 0.13
5/16/2010 0.00
5/17/2010 0.02
5/18/2010 0.35
5/19/2010 0.18
5/20/2010 T
5/21/2010 0.00
5/22/2010 0.00
5/23/2010 0.79
5/24/2010 0.16
5/25/2010 0.01
5/26/2010 0.00
5/27/2010 0.00
5/28/2010 0.30
5/29/2010 0.00
5/30/2010 0.00
5/31/2010 0.00
6/1/2010 0.00
6/2/2010 0.00
6/3/2010 0.00
6/4/2010 0.06
6/5/2010 0.02
6/6/2010 0.00
6/7/2010 0.30
6/8/2010 0.00
6/9/2010 T
6/10/2010 0.07
6/11/2010 0.00
6/12/2010 0.00
6/13/2010 0.00
6/14/2010 0.00
6/15/2010 T
6/16/2010 0.26
6/17/2010 0.38
6/18/2010 0.00
6/19/2010 0.00
6/20/2010 0.00
6/21/2010 0.00
6/22/2010 0.00
6/23/2010 0.45
6/24/2010 0.00
6/25/2010 T
6/26/2010 0.00
6/27/2010 0.00
6/28/2010 0.00
6/29/2010 0.69
6/30/2010 0.00
Day of YearDaily PrcpMultiday Prcp
7/1/2010 0.00
7/2/2010 0.00
7/3/2010 0.00
7/4/2010 0.00
7/5/2010 0.00
7/6/2010 0.00
7/7/2010 0.00
7/8/2010 0.00
7/9/2010 0.00
7/10/2010 0.11
7/11/2010 0.38
7/12/2010 0.00
7/13/2010 0.47
7/14/2010 1.39
7/15/2010 0.12
7/16/2010 0.00
7/17/2010 0.22
7/18/2010 0.00
7/19/2010 0.18
7/20/2010 T
7/21/2010 0.00
7/22/2010 0.00
7/23/2010 0.00
7/24/2010 0.00
7/25/2010 0.00
7/26/2010 0.55
7/27/2010 0.00
7/28/2010 0.00
7/29/2010 0.00
7/30/2010 0.10
7/31/2010 0.00
8/1/2010 0.07
8/2/2010 0.02
8/3/2010 0.03
8/4/2010 0.42
8/5/2010 0.00
8/6/2010 0.15
8/7/2010 0.00
8/8/2010 0.00
8/9/2010 0.00
8/10/2010 0.00
8/11/2010 0.00
8/12/2010 1.65
8/13/2010 1.86
8/14/2010 0.00
8/15/2010 0.00
8/16/2010 0.40
8/17/2010 0.00
8/18/2010 2.86
8/19/2010 0.03
8/20/2010 0.00
8/21/2010 0.00
8/22/2010 T
8/23/2010 0.05
8/24/2010 0.13
8/25/2010 0.00
8/26/2010 0.00
8/27/2010 0.00
8/28/2010 0.00
8/29/2010 0.00
8/30/2010 0.00
8/31/2010 0.00
9/1/2010 0.00
9/2/2010 0.00
9/3/2010 0.00
9/4/2010 0.00
9/5/2010 0.00
9/6/2010 0.00
9/7/2010 0.00
9/8/2010 0.00
9/9/2010 0.00
9/10/2010 0.00
9/11/2010 0.00
9/12/2010 0.82
9/13/2010 0.09
9/14/2010 0.00
9/15/2010 0.00
9/16/2010 0.00
9/17/2010 0.11
9/18/2010 0.00
9/19/2010 0.00
9/20/2010 0.00
9/21/2010 0.00
9/22/2010 0.00
9/23/2010 0.55
9/24/2010 0.00
9/25/2010 0.00
9/26/2010 0.00
9/27/2010 0.56
9/28/2010 0.24
9/29/2010 0.00
9/30/2010 2.33



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
10/1/2009 8:00 AM 0.00 0.0 M M M
10/2/2009 8:00 AM 0.00 0.0 M M M
10/3/2009 8:00 AM 0.11 M M M M Friday late evening showers
10/4/2009 8:00 AM 0.00 0.0 M M M
10/5/2009 8:00 AM 0.00 0.0 M M M
10/6/2009 8:00 AM 0.00 0.0 M M M
10/7/2009 8:00 AM 0.06 M M M M showers between midnight and sunrise
10/8/2009 7:00 AM 0.00 0.0 M M M
10/9/2009 7:00 AM 0.00 0.0 M M M
10/10/2009 8:00 AM 0.03 M M M M showers after midnight
10/11/2009 8:00 AM 0.01 M M M M leftover light showers Saturday morning
10/12/2009 8:00 AM 0.00 0.0 M M M
10/13/2009 8:00 AM 0.00 0.0 M M M
10/14/2009 8:00 AM 0.00 0.0 M M M
10/15/2009 8:00 AM 0.11 M M M M periods of light rain Wednesday afternoon and evening - more rain later at night
10/16/2009 8:00 AM 0.71 M M M M periods of cold rain and drizzle
10/17/2009 8:00 AM 0.88 M M M M periods of light rain and drizzle Saturday became a steadier rain overnight
10/18/2009 8:00 AM 1.91 M M M M steady rain Saturday with some very heavy rain late Saturday evening; light rain and drizzle persisted until early morning
10/19/2009 7:00 AM 0.00 0.0 M M M
10/20/2009 7:00 AM 0.00 0.0 M M M
10/21/2009 7:00 AM 0.00 0.0 M M M
10/22/2009 7:00 AM 0.00 0.0 M M M
10/23/2009 8:00 AM 0.00 0.0 M M M
10/24/2009 8:00 AM 0.02 0.0 M M M few showers Friday evening and some light showers later at night
10/25/2009 8:00 AM 0.96 M M M M few rapidly moving light showers during morning and early afternoon; frontal band arrived by mid afternoon with occasional torrential downpours
10/26/2009 8:00 AM 0.00 0.0 M M M
10/27/2009 8:00 AM 0.59 M M M M periods of rain after midnight; light rain still falling at time of observation
10/28/2009 8:00 AM 1.28 M M M M leftover morning light rain and drizzle. steadier rain redeveloped in the late afternoon and became heavy overnight
10/29/2009 8:00 AM 0.00 0.0 M M M
10/30/2009 8:00 AM T M M M M some very light drizzle
10/31/2009 8:00 AM 0.02 M M M M some light rain and drizzle overnight
11/1/2009 8:00 AM 0.41 M M M M light showers and drizzle Saturday morning; steadier rain developed just after midnight
11/2/2009 8:00 AM 0.20 M M M M lingering periods of light rain Sunday that ended around noon; a few brief heavier showers
11/3/2009 7:00 AM 0.00 0.0 M M M
11/4/2009 7:00 AM 0.00 0.0 M M M
11/5/2009 8:00 AM T M M M M few drops around sunset Wednesday
11/6/2009 8:00 AM 0.04 M M M M period of showers Thursday afternoon
11/7/2009 7:00 AM 0.00 0.0 M M M
11/8/2009 7:00 AM 0.00 0.0 M M M
11/9/2009 7:00 AM 0.00 0.0 M M M
11/10/2009 7:00 AM 0.00 0.0 M M M
11/11/2009 8:00 AM 0.12 M M M M periods of light rain developed after midnight
11/12/2009 8:00 AM 1.17 M M M M steady rain throughout the period
11/13/2009 8:00 AM 0.24 M M M M more light rain and drizzle, mainly during the daylight hours Thursday
11/14/2009 8:00 AM 0.34 M M M M band of heavy showers around midday Friday with occasional light rain and drizzle after that
11/15/2009 8:00 AM T M M M M some leftover drizzle Saturday morning
11/16/2009 8:00 AM 0.00 0.0 M M M
11/17/2009 8:00 AM 0.00 0.0 M M M
11/18/2009 8:00 AM 0.00 0.0 M M M
11/19/2009 8:00 AM 0.01 M M M M light rain and drizzle overnight
11/20/2009 8:00 AM 0.64 M M M M few showers during Thursday. heavy thunderstorm between 10:40 and 11:20 with a fair amount of lightning and thunder. a few downpours between 11:30 and midnight with a single clap of thunder. a few trailing light showers just after midnight.
11/21/2009 7:00 AM 0.00 0.0 M M M
11/22/2009 7:00 AM 0.00 0.0 M M M
11/23/2009 7:00 AM 0.00 0.0 M M M
11/24/2009 8:00 AM 1.16 M M M M periods of rain Monday and Monday night with heaviest rain falling between 11:30PM and 12:30AM. light rain still falling at time of observation
11/25/2009 8:00 AM 0.21 M M M M
11/26/2009 8:00 AM T M M M M
11/27/2009 8:00 AM 0.20 M M M M overnight showers
11/28/2009 8:00 AM T M M M M few sprinkles Friday afternoon
11/29/2009 8:00 AM 0.00 0.0 M M M
11/30/2009 8:00 AM 0.00 0.0 M M M
12/1/2009 8:00 AM 0.25 M M M M periods of rain and showers from mid-morning through early evening.
12/2/2009 8:00 AM 0.00 0.0 M M M
12/3/2009 8:00 AM 0.94 M M M M periods of rain developed early afternoon and continued into the late evening with 0.50" falling prior to midnight. a batch of more convective precip with heavy rain arrived just after midnight with another 0.44"
12/4/2009 8:00 AM 0.00 0.0 M M M
12/5/2009 8:00 AM 0.04 M M M M light rain began just before sunrise
12/6/2009 8:00 AM 0.78 1.5 1.00 M M rain at start of period mixed with snowflakes around 9:30 and changed over to snow by 10:15AM. snow throughout the day into the early evening struggled to accumulate on the warm ground but eventually did on grassy surfaces, decks, and cars
12/7/2009 8:00 AM 0.00 0.0 M T M
12/8/2009 8:00 AM 0.00 0.0 M T M
12/9/2009 8:00 AM 1.61 T M M M precip began as a little snow and sleet and then turned to rain which was heavy after midnight
12/10/2009 8:00 AM 0.00 0.0 M M M
12/11/2009 8:00 AM 0.00 0.0 M M M
12/12/2009 8:00 AM 0.00 0.0 M M M
12/13/2009 8:00 AM 0.04 M M M M light rain began around dawn
12/14/2009 8:00 AM 0.64 M M M M periods of rain Sunday morning into the middle of the afternoon
12/15/2009 8:00 AM 0.00 0.0 M M M
12/16/2009 7:00 AM 0.00 0.0 M M M
12/17/2009 7:00 AM 0.00 0.0 M M M
12/18/2009 7:00 AM 0.00 0.0 M M M
12/21/2009 8:00 AM 0.00 0.0 M 17.0 M
12/22/2009 8:00 AM 0.00 0.0 M 15.0 M
12/23/2009 8:00 AM 0.00 0.0 M 14.0 M
12/24/2009 8:00 AM 0.00 0.0 M 12.0 M
12/25/2009 8:00 AM 0.00 0.0 M 10.0 M
12/26/2009 8:00 AM 1.35 M M 2.0 M periods of heavy rain developed during the late evening and continued through the night
12/27/2009 8:00 AM 0.20 M M 0.0 M leftover morning rain
12/28/2009 7:00 AM 0.00 0.0 M M M
12/29/2009 7:00 AM 0.00 0.0 M M M
12/30/2009 7:00 AM 0.00 0.0 M M M
12/31/2009 8:00 AM 0.24 0.8 M 0.5 M snow/sleet mixture turned to freezing rain and then all rain
1/1/2010 7:00 AM 0.23 M M M M morning rain on the 31st
1/2/2010 7:00 AM 0.00 0.0 M M M
1/3/2010 7:00 AM 0.00 0.0 M M M
1/4/2010 7:00 AM 0.00 0.0 M M M
1/5/2010 8:00 AM T T M 0.0 M overnight flurries
1/6/2010 8:00 AM T T M 0.0 M few flurries around 8:30AM Tuesday
1/7/2010 8:00 AM 0.00 0.0 M M M
1/8/2010 8:00 AM 0.11 2.1 M 2.0 M light snow began around 10PM; heavier snow band arrived around 4AM, ending just before sunrise
1/9/2010 8:00 AM 0.00 0.0 M 1.0 M
1/10/2010 8:00 AM 0.00 0.0 M 1.0 M
1/11/2010 8:00 AM 0.00 0.0 M 0.5 M
1/12/2010 8:00 AM 0.00 0.0 M T M
1/13/2010 8:00 AM 0.00 0.0 M T M
1/14/2010 8:00 AM 0.00 0.0 M M M
1/15/2010 8:00 AM 0.00 0.0 M M M
1/16/2010 8:00 AM 0.00 0.0 M M M
1/17/2010 8:00 AM 0.02 M M M M light rain arrived just after sunrise
1/18/2010 8:00 AM 0.69 M M M M steady rain Sunday morning with a heavier period during the late morning tapered to lighter rain and drizzle by early afternoon. drizzle ended prior to midnight
1/19/2010 8:00 AM 0.00 0.0 M M M
1/20/2010 8:00 AM 0.06 0.1 M T M period of light rain after midnight which turned to a sleet/snow mixture
1/21/2010 8:00 AM 0.00 0.0 M M M
1/22/2010 8:00 AM 0.16 0.1 M 0.0 M precip began as sleet Thursday evening and briefly covered surfaces before changing to rain
1/23/2010 8:00 AM T M M M M few leftover sprinkes Friday morning
1/24/2010 8:00 AM 0.00 0.0 M M M
1/25/2010 8:00 AM 0.51 M M M M periods of light rain developed Sunday with some steadier rain overnight
1/26/2010 8:00 AM 0.16 M M M M a few brief showers Monday morning. brief but heavy shower around 5:30 PM and some lighter showers again later in the evening
1/27/2010 8:00 AM 0.02 T M 0.0 M afternoon snow/rain shower
1/28/2010 8:00 AM 0.00 0.0 M M M
1/29/2010 8:00 AM 0.00 0.0 M M M
1/30/2010 8:00 AM 0.00 0.0 M M M
1/31/2010 8:00 AM 0.33 6.4 M 6.0 M snow developed around 9:30 AM Saturday and became heavy at time before finally becoming intermittent by 7PM and ending prior to midnight
2/1/2010 8:00 AM 0.00 0.0 M 4.0 M
2/2/2010 8:00 AM 0.00 0.0 M 3.0 M
2/3/2010 8:00 AM 0.39 5.1 M 7.0 M a light wet snow started around 6PM and became heavier through the evening and started sticking. end time was around 3AM
2/4/2010 8:00 AM 0.00 0.0 M 4.0 M
2/5/2010 8:00 AM 0.00 0.0 M 2.0 M
2/8/2010 8:00 AM 0.00 0.0 M 28.0 M
2/9/2010 8:00 AM 0.00 0.0 M 26.0 M
2/12/2010 8:00 AM 0.00 0.0 M 25.0 M
2/13/2010 8:00 AM 0.00 0.0 M 22.0 M
2/14/2010 8:00 AM 0.00 0.0 M 22.0 M
2/15/2010 8:00 AM 0.00 0.0 M 21.0 M
2/16/2010 8:00 AM 0.05 0.3 M 20.0 M snow began around 3PM Monday and became moderate for a while. it changed to light rain and drizzle before ending during the evening. another round of very light snow later at night
2/17/2010 8:00 AM T T M 21.0 M couple of flurries Tuesday afternoon
2/18/2010 8:00 AM T T M 19.0 M several periods of very light flurries with a slightly heavier batch just prior to midnight
2/19/2010 8:00 AM 0.00 0.0 M 18.0 M
2/20/2010 8:00 AM 0.00 0.0 M M M
2/21/2010 8:00 AM 0.00 0.0 M 15.0 M
2/22/2010 8:00 AM 0.00 0.0 M 13.0 M
2/23/2010 7:00 AM 0.23 M M 10.0 M periods of rain Monday afternoon and evening, ending just prior to midnight
2/24/2010 8:00 AM 0.00 0.0 M 8.0 M
2/25/2010 8:00 AM 0.03 T M 6.0 M light rain developed just after midnight and mixed with wet snow
2/26/2010 8:00 AM T T M 5.0 M scattered flurries
2/27/2010 8:00 AM 0.05 0.6 M 4.0 M flurries during Friday became a steadier light snow in the late evening which picked up a bit more in intensity after midnight
2/28/2010 8:00 AM 0.00 0.0 M 2.0 M
3/1/2010 8:00 AM T T M 1.5 M couple of very brief snow showers Sunday afternoon
3/2/2010 8:00 AM 0.00 0.0 M 1.0 M more than half of backyard still has snow cover
3/3/2010 8:00 AM 0.12 T M 0.5 M light rain Tuesday affternoon through late evening with a few wet snowflakes mixed in during the late evening
3/4/2010 8:00 AM 0.01 M M T M periods of drizzle a few patches of snow remain
3/5/2010 8:00 AM 0.00 0.0 M T M
3/6/2010 8:00 AM 0.00 0.0 M T M
3/7/2010 8:00 AM 0.00 0.0 M T M
3/8/2010 8:00 AM 0.00 0.0 M M M
3/9/2010 8:00 AM 0.00 0.0 M M M
3/10/2010 8:00 AM 0.00 0.0 M T M this is the last day on which a trace of snow will be reported, as the yard is almost bare now
3/11/2010 8:00 AM 0.00 0.0 M 0.0 M
3/12/2010 8:00 AM 0.66 M M M M periods of rain developed just after midnight
3/13/2010 8:00 AM 0.82 M M M M periods of rain throughout Friday and Friday night
3/14/2010 8:00 AM 1.45 M M M M periods of rain Saturday with several heavier downpours and another band of heavier showers after midnight
3/15/2010 8:00 AM 0.05 M M M M a few showers
3/16/2010 8:00 AM 0.06 M M M M a few leftover showers Monday afternoon and evening
3/17/2010 8:00 AM 0.00 0.0 M 0.0 M
3/18/2010 8:00 AM 0.00 0.0 M M M
3/19/2010 8:00 AM 0.00 0.0 M M M
3/20/2010 8:00 AM 0.00 0.0 M M M
3/21/2010 8:00 AM 0.00 0.0 M M M
3/22/2010 8:00 AM 0.02 M M M M few showers prior to observation
3/23/2010 8:00 AM 0.60 M M M M periods of showers Monday morning and early afternoon; lightning data suggests that thunder was heard
3/24/2010 8:00 AM 0.01 M M M M a few Tuesday afternoon showers
3/25/2010 8:00 AM 0.00 0.0 M M M
3/26/2010 8:00 AM 0.20 M M M M period of overnight rain
3/27/2010 8:00 AM 0.09 M M M M periods of light rain Friday morning
3/28/2010 8:00 AM 0.00 0.0 M M M
3/29/2010 8:00 AM 0.77 M M M M rain developed Sunday evening and became heavy during the late evening. it tapered off to lighter rain around midnight
3/30/2010 8:00 AM 0.13 M M M M periods of light rain Monday morning and again overnight
3/31/2010 8:00 AM 0.07 M M M M periods of light rain in the late afternoon and evening
4/1/2010 7:00 AM 0.00 0.0 M M M
4/2/2010 7:00 AM 0.00 0.0 M M M
4/3/2010 7:00 AM 0.00 0.0 M M M
4/4/2010 7:00 AM 0.00 0.0 M M M
4/5/2010 7:00 AM 0.00 0.0 M M M
4/6/2010 8:00 AM 0.00 0.0 M M M couple of drops in the early morning
4/7/2010 7:00 AM 0.00 0.0 M M M
4/8/2010 7:00 AM 0.00 0.0 M M M
4/9/2010 8:00 AM 0.70 M M M M initial surging mini bow echo provided a burst of wind (with some minor tree damage in neighborhood) and heavy rain; periods of moderate to sometimes heavier rain lasted past midnight
4/10/2010 7:00 AM 0.00 0.0 M M M
4/11/2010 7:00 AM 0.00 0.0 M M M
4/12/2010 7:00 AM 0.00 0.0 M M M
4/13/2010 7:00 AM 0.00 0.0 M M M
4/14/2010 8:00 AM 0.16 M M M M periods of rain Tuesday ended during the evening
4/15/2010 7:00 AM 0.00 0.0 M M M
4/16/2010 7:00 AM 0.00 0.0 M M M
4/17/2010 8:00 AM 0.02 M M M M initial convective band passing to the north sent intense outflow winds through here around 7:15PM, causing fairly significant tree damage which took wires down. Power restored after 1AM. Phone wires still hanging on ground in backyard. light showers between 8 and 9PM accounted for the precip with a few drops also after midnight.
4/18/2010 7:00 AM 0.00 0.0 M M M
4/19/2010 7:00 AM 0.00 0.0 M M M
4/20/2010 7:00 AM 0.00 0.0 M M M
4/21/2010 7:00 AM 0.00 0.0 M M M
4/22/2010 8:00 AM 0.40 M M M M periods of light rain developed Thursday morning. by early afternoon, it appeared that we would end up with less than 0.10", as the majority of the rain seemed to have passed to the northeast, but the echoes filled in and steady rain fell between 3 and 6PM.
4/23/2010 7:00 AM 0.00 0.0 M M M
4/24/2010 7:00 AM 0.00 0.0 M M M
4/25/2010 8:00 AM 0.11 M M M M few sprinkles during Saturday and then periods of light rain Saturday night
4/26/2010 8:00 AM 0.65 M M M M interesting day! warm front lifted north early Sunday afternoon allowing sun to come out and temperature to reach near 70. warm front then retreated south in the late afternoon returning location to clouds, east winds, and cool. Initial convection passed north 6:30-7PM with some thunder and then back-built into the area around 8:30PM. Second line arrived with more heavy rain and thunder and strong lead outflow around 10PM with occasional cells training behind it until just after midnight. No hail was observed here, but a neighbor a mile away did report some.
4/27/2010 8:00 AM 0.05 M M M M a few passing showers during the day and one final one just prior to midnight
4/28/2010 8:00 AM 0.00 0.0 M M M
4/29/2010 7:00 AM 0.00 0.0 M M M
4/30/2010 7:00 AM 0.00 0.0 M M M
5/1/2010 7:00 AM 0.00 0.0 M M M
5/2/2010 8:00 AM T M M M M dying shower around 5AM
5/3/2010 8:00 AM 0.42 M M M M showers developed well after midnight with a few heavier downpours towards dawn
5/4/2010 8:00 AM 0.05 M M M M leftover light showers Monday morning and then a heavier shower around 6PM
5/5/2010 7:00 AM 0.00 0.0 M M M
5/6/2010 7:00 AM 0.00 0.0 M M M
5/7/2010 7:00 AM 0.00 0.0 M M M
5/8/2010 7:00 AM 0.00 0.0 M M M
5/9/2010 8:00 AM 0.00 0.0 M M M dry frontal passage Saturday morning, but convection formed well east of here and was visible from a distance of 75 or so miles away in the dry, clear post-frontal air.
5/10/2010 7:00 AM 0.00 0.0 M M M
5/11/2010 7:00 AM 0.00 0.0 M M M
5/12/2010 8:00 AM 0.24 M M M M periods of rain developed late Tuesday morning and tapered off by late afternoon. one final shower around 7:15PM
5/13/2010 8:00 AM 0.91 M M M M heavy shower ahead of main MCS Wednesday afternoon around 4:15 (0.22") followed by occasional light rain and distant thunder. MCS arrived around 6PM with very heavy rainfall and occasional thunder (0.67"). final shower just after midnight (0.02").
5/14/2010 8:00 AM T M M M M some very light rain and drizzle
5/15/2010 8:00 AM 0.13 M M M M early evening thunderstorm - no hail observed.
5/16/2010 8:00 AM 0.00 0.0 M M M
5/17/2010 8:00 AM 0.02 M M M M light rain arrived early morning
5/18/2010 8:00 AM 0.35 M M M M periods of rain Monday with steadier rain during the late evening
5/19/2010 8:00 AM 0.18 M M M M rain Tuesday morning with lingering light rain and drizzle
5/20/2010 8:00 AM T M M M M few sprinkles yesterday evening
5/21/2010 7:00 AM 0.00 0.0 M M M
5/22/2010 7:00 AM 0.00 0.0 M M M
5/23/2010 8:00 AM 0.79 M M M M light showers Saturday early evening (0.03"); heavy showers with occasional rumber of thunder after midnight
5/24/2010 8:00 AM 0.16 M M M M
5/25/2010 8:00 AM 0.01 M M M M
5/26/2010 7:00 AM 0.00 0.0 M M M
5/27/2010 7:00 AM 0.00 0.0 M M M
5/28/2010 8:00 AM 0.30 M M M M overnight TRW
5/29/2010 7:00 AM 0.00 0.0 M M M
5/30/2010 7:00 AM 0.00 0.0 M M M
5/31/2010 7:00 AM 0.00 0.0 M M M
6/1/2010 7:00 AM 0.00 0.0 M M M
6/2/2010 7:00 AM 0.00 0.0 M M M
6/3/2010 7:00 AM 0.00 0.0 M M M
6/4/2010 8:00 AM 0.06 M M M M light rain with occasional thunder between 5:30 and 6:30 but heaviest activity stayed north and south
6/5/2010 8:00 AM 0.02 M M M M dying showers passed through around 11PM
6/6/2010 7:00 AM 0.00 0.0 M M M
6/7/2010 8:00 AM 0.30 0.0 M M M mid-afternoon squall line Sunday
6/8/2010 7:00 AM 0.00 0.0 M M M
6/9/2010 8:00 AM T M M M M very light precip just starting
6/10/2010 8:00 AM 0.07 M M M M disappointing rain event yesterday
6/11/2010 7:00 AM 0.00 0.0 M M M
6/12/2010 7:00 AM 0.00 0.0 M M M
6/13/2010 8:00 AM 0.00 0.0 M M M couple of drops Saturday afternoon
6/14/2010 8:00 AM 0.00 0.0 M M M
6/15/2010 8:00 AM T M M M M a pathetic light shower in what is becoming a very dry pattern
6/16/2010 8:00 AM 0.26 M M M M few sprinkles Tuesday afternoon followed by heavy shower around 4:30 AM
6/17/2010 8:00 AM 0.38 M M M M heavy late morning thunderstorm and then a brief dying shower in the late afternoon
6/18/2010 7:00 AM 0.00 0.0 M M M
6/19/2010 7:00 AM 0.00 0.0 M M M
6/20/2010 8:00 AM 0.00 0.0 M M M
6/21/2010 7:00 AM 0.00 0.0 M M M
6/22/2010 7:00 AM 0.00 0.0 M M M
6/23/2010 8:00 AM 0.45 M M M M heavy evening thunderstorm
6/24/2010 7:00 AM 0.00 0.0 M M M
6/25/2010 8:00 AM T M M M M few drops with dying line of convection
6/26/2010 7:00 AM 0.00 0.0 M M M
6/27/2010 7:00 AM 0.00 0.0 M M M
6/28/2010 7:00 AM 0.00 0.0 M M M
6/29/2010 8:00 AM 0.69 M M M M heavy mid-afternoon thunderstorm with some trailing stratiform rain; very brief, gusty shower just before 11PM contributed 0.01"
6/30/2010 7:00 AM 0.00 0.0 M M M
7/1/2010 7:00 AM 0.00 0.0 M M M
7/2/2010 7:00 AM 0.00 0.0 M M M
7/3/2010 7:00 AM 0.00 0.0 M M M
7/4/2010 7:00 AM 0.00 0.0 M M M
7/5/2010 7:00 AM 0.00 0.0 M M M
7/6/2010 7:00 AM 0.00 0.0 M M M
7/7/2010 7:00 AM 0.00 0.0 M M M
7/8/2010 7:00 AM 0.00 0.0 M M M
7/9/2010 7:00 AM 0.00 0.0 M M M
7/10/2010 8:00 AM 0.11 M M M M brief sprinke just before midnight then showers developed late at night
7/11/2010 8:00 AM 0.38 M M M M showers Saturday morning, occasionally moderate, which tapered to drizzle by early afternoon
7/12/2010 7:00 AM 0.00 0.0 M M M
7/13/2010 8:00 AM 0.47 M M M M afternoon t-storms mostly skirted this location with only a brief downpour (0.06"; gusty, heavy t-storm arrived just after 10:30 with a few trailing showers behind it; later night convection generally passed to the southeast
7/14/2010 8:00 AM 1.39 M M M M light rain early evening immediately followed by heavy, gust thunderstorm around 8:30, with the head of the comma associated with the mesoscale convective vortex passing very close to here - 0.48. Second heavier thunderstorm arrived just after midnight -0.91.
7/15/2010 8:00 AM 0.12 M M M M periods of light rain Wed. morning that ended just after noon
7/16/2010 7:00 AM 0.00 0.0 M M M
7/17/2010 8:00 AM 0.22 M M M M nice lightning show to the south around midnight. some weaker storms then developed on the northern flank of the DC system and moved over this station with generally moderate rain but one heavier downpour
7/18/2010 7:00 AM 0.00 0.0 M M M
7/19/2010 8:00 AM 0.18 M M M M brief but intense t-storm arrived around 11:15PM with several close lightning strikes (0.15"); 2nd dying t-storm just after midnight (0.03")
7/20/2010 8:00 AM T M M M M clipped by early evening shower
7/21/2010 7:00 AM 0.00 0.0 M M M
7/22/2010 7:00 AM 0.00 0.0 M M M
7/23/2010 7:00 AM 0.00 0.0 M M M
7/24/2010 7:00 AM 0.00 0.0 M M M
7/25/2010 7:00 AM 0.00 0.0 M M M
7/26/2010 8:00 AM 0.55 M M M M violent t-storm arrived just after 3:30 pm with torrential rains and winds probably in the 50-55 mph range. damage right around my house was limited to small tree branches and a brief power outage, but significant tree damage was observed as close as 1/4 mile away
7/27/2010 7:00 AM 0.00 0.0 M M M
7/28/2010 7:00 AM 0.00 0.0 M M M
7/29/2010 7:00 AM 0.00 0.0 M M M
7/30/2010 8:00 AM 0.10 M M M M brief soaking from early afternoon line of storms, but the subsequent activity missed this location to both the east and west
7/31/2010 7:00 AM 0.00 0.0 M M M
8/1/2010 8:00 AM 0.07 M M M M period of showers began around 1AM and ended before 2AM
8/2/2010 8:00 AM 0.02 M M M M some light rain and drizzle late at night
8/3/2010 8:00 AM 0.03 M M M M a few showers during Monday
8/4/2010 8:00 AM 0.42 M M M M thundershower arrived just after 4AM
8/5/2010 8:00 AM 0.00 0.0 M M M evening storms passed just to my north with lots of lightning and some thunder
8/6/2010 8:00 AM 0.15 M M M M early morning sprinkle (T) followed by brief but heavy thunderstorm around 4PM (0.14) and then a dying thundershower just after 7PM (0.01)
8/7/2010 7:00 AM 0.00 0.0 M M M
8/8/2010 7:00 AM 0.00 0.0 M M M
8/9/2010 7:00 AM 0.00 0.0 M M M
8/10/2010 7:00 AM 0.00 0.0 M M M
8/11/2010 7:00 AM 0.00 0.0 M M M
8/12/2010 8:15 AM 1.65 M M M M couple of very heavy showers between 5:45 and 6:15; line of thunderstorms will torrential downpours arrived just after 7AM and ended just after 8AM. No severe wx at this location - winds gusted perhaps to 25 kt.
8/13/2010 8:00 AM 1.86 M M M M dying line of thunderstorms arrived around 6PM Thursday (0.02"); band of showers rotated in from the northeast around 10:30PM, and then a soaking rain (mainly after midnight) from another area of rain rotating southwest that consolidated into a band that sat over this area for a few hours
8/14/2010 7:00 AM 0.00 0.0 M M M
8/15/2010 8:00 AM 0.00 0.0 M M M an early morning shower passed just to the south
8/16/2010 8:00 AM 0.40 M M M M several rounds of showers Sunday morning including a few heavier downpours. tapered off around 1PM
8/17/2010 8:00 AM 0.00 0.0 M M M distant in-cloud lightning visible during evening from cell located on the PA/MD border!
8/18/2010 12:00 PM 2.86 M M M M heavy thunderstorm around 4AM followed by more periods of rain; periods of very heavy rain fell between 8AM and 11AM and tapered off just before noon
8/19/2010 11:00 AM 0.03 M M M M period of light showers late Wednesday afternoon; month total now up to just about 7.5"
8/20/2010 7:00 AM 0.00 0.0 M M M
8/21/2010 7:00 AM 0.00 0.0 M M M
8/22/2010 7:00 AM T M M M M few sprinkles late Saturday evening
8/23/2010 8:00 AM 0.05 M M M M early morning period of showers Sunday followed by a narrow, fast-moving line of showers around 2PM
8/24/2010 8:00 AM 0.13 M M M M couple of sprinkes early evening; had a little thunder and lightning mid-evening from a cell to my northeast; showers finally buiilt to the south around 11PM and lasted past midnight
8/25/2010 7:00 AM 0.00 0.0 M M M
8/26/2010 7:00 AM 0.00 0.0 M M M
8/27/2010 7:00 AM 0.00 0.0 M M M
8/28/2010 7:00 AM 0.00 0.0 M M M
8/29/2010 7:00 AM 0.00 0.0 M M M
8/30/2010 7:00 AM 0.00 0.0 M M M
8/31/2010 7:00 AM 0.00 0.0 M M M
9/1/2010 7:00 AM 0.00 0.0 M M M
9/2/2010 7:00 AM 0.00 0.0 M M M
9/3/2010 7:00 AM 0.00 0.0 M M M
9/4/2010 7:00 AM 0.00 0.0 M M M
9/5/2010 7:00 AM 0.00 0.0 M M M
9/6/2010 7:00 AM 0.00 0.0 M M M
9/7/2010 7:00 AM 0.00 0.0 M M M
9/8/2010 7:00 AM 0.00 0.0 M M M
9/9/2010 7:00 AM 0.00 0.0 M M M
9/10/2010 7:00 AM 0.00 0.0 M M M
9/11/2010 7:00 AM 0.00 0.0 M M M
9/12/2010 8:00 AM 0.82 M M M M showers developed after 3AM with a little lighting and thunder between 3:45AM and 4:30
9/13/2010 8:00 AM 0.09 M M M M periods of drizzle and light rain persisted into Sunday afternoon; more mist overnight
9/14/2010 7:00 AM 0.00 0.0 M M M
9/15/2010 7:00 AM 0.00 0.0 M M M
9/16/2010 7:00 AM 0.00 0.0 M M M
9/17/2010 8:00 AM 0.11 M M M M periods of light rain and showers Thursday afternoon, a few more brief showers during the evening, and then a dying line of showers around 1AM
9/18/2010 7:00 AM 0.00 0.0 M M M
9/19/2010 7:00 AM 0.00 0.0 M M M
9/20/2010 7:00 AM 0.00 0.0 M M M
9/21/2010 7:00 AM 0.00 0.0 M M M
9/22/2010 7:00 AM 0.00 0.0 M M M
9/23/2010 8:00 AM 0.55 M M M M early evening thunderstorm with heavy rain, intense lightning, and gusty winds that took down some large branches in the neighborhood. brief shower around 2AM brought an additional 0.01"
9/24/2010 7:00 AM 0.00 0.0 M M M
9/25/2010 7:00 AM 0.00 0.0 M M M
9/26/2010 7:00 AM 0.00 0.0 M M M
9/27/2010 8:00 AM 0.56 M M M M periods of light showers Sunday morning; heavier shower Sunday evening with main activity just to the east; occasional moderate to heavier showers after midnight
9/28/2010 8:00 AM 0.24 M M M M a few periods of showers Monday and Monday evening with just 0.02" after midnight. event total: 0.80" which is surprisingly low
9/29/2010 7:00 AM 0.00 0.0 M M M
9/30/2010 8:00 AM 2.33 M M M M light rain developed just after noon Monday but was sporadic through late evening; steadier rain developed around 11PM and continued overnight with particularly intense rain around 4AM



Start Date End Date & Time Duration in Days Precipitation Snow Depth Snow Depth SWE Notes
12/19/2009 12/20/2009 8:00 AM 2 1.54 19.1 M snow began late Friday evening and ended just after midnight Saturday. heaviest snow fell between 11AM and 4PM Saturday
2/6/2010 2/07/2010 8:00 AM 2 2.77 32.2 M impossible to take precip reading Saturday morning. light snow began around 10AM Friday and picked up during afternoon. Heavy snow Friday night with wind gusts to 30 kt and at least a few flashes of lightning. Approx 9.5" fell between 10PM and 2AM. Comma head snow most of Saturday was more powdery than Friday night wet snow which damaged many trees in the neigborhood. Liquid total is likely a bit low due to blowing and difficulty keeping all precip in gauge.
2/10/2010 2/11/2010 8:00 AM 2 0.88 32.0 M snow developed Tuesday evening and mixed with sleet and freezing rain overnight before turning back to snow. wind-driven snow for most of Wednesday but heaviest bands stayed just to my north. total storm accumulation: 9.6"



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