Station Overview Station Location
Station Number MD-CH-12 Latitude 38.614129
Station Name Bryans Road MD 2 ESE Longitude -77.036119
County Charles Elevation (ft) 190



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 3.56 6.47 32 6.47 19 0.00 13 1 10 1 0.0 0 0
Nov 09 3.45 6.66 29 6.66 29 0.00 0 0 14 0 0.0 0 0
Dec 09 3.33 8.53 26 8.53 26 0.00 0 0 11 0 26.7 2 9
Jan 10 2.98 2.66 24 2.66 24 0.00 0 0 11 3 16.6 4 3
Feb 10 2.79 4.37 26 4.37 26 0.00 0 0 11 0 36.7 7 11
March 10 3.76 4.84 16 4.84 16 0.00 0 0 14 1 0.0 0 0
April 10 3.30 2.12 17 2.12 17 0.00 0 0 9 1 0.0 0 0
May 10 4.08 1.68 7 1.68 7 0.00 0 0 7 0 0.0 0 0
June 10 4.06 3.41 9 3.41 9 0.00 0 0 9 0 0.0 0 0
July 10 3.92 5.67 9 5.67 9 0.00 0 0 9 0 0.0 0 0
Aug 10 3.55 3.08 16 3.08 16 0.00 0 0 7 0 0.0 0 0
Sept 10 3.88 3.34 7 3.34 7 0.00 0 0 7 0 0.0 0 0
Water Year Totals: 42.66" 52.83" 218 days 52.83" 205 0.00" 13 days 1 119 days 6 days 80.0" 13 days 23 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 **
10/2/2009 **
10/3/2009 **
10/4/2009 **
10/5/2009 **
10/6/2009 **
10/7/2009 **
10/8/2009 **
10/9/2009 **
10/10/2009 **
10/11/2009 **
10/12/2009 **
10/13/2009 0.00 0.00
10/14/2009 0.00
10/15/2009 0.01
10/16/2009 0.75
10/17/2009 0.52
10/18/2009 1.73
10/19/2009 0.14
10/20/2009 0.00
10/21/2009 0.00
10/22/2009 0.00
10/23/2009 0.00
10/24/2009 0.01
10/25/2009 0.56
10/26/2009 0.00
10/27/2009 0.00
10/28/2009 0.90
10/29/2009 1.55
10/30/2009 T
10/31/2009 0.30
11/1/2009 0.61
11/2/2009 0.00
11/3/2009 0.00
11/4/2009 0.00
11/5/2009 0.02
11/6/2009 0.00
11/7/2009 0.00
11/8/2009
11/9/2009 0.00
11/10/2009 0.00
11/11/2009 1.14
11/12/2009 1.29
11/13/2009 0.90
11/14/2009 0.07
11/15/2009 0.00
11/16/2009 0.00
11/17/2009 0.00
11/18/2009 0.00
11/19/2009 0.25
11/20/2009 0.49
11/21/2009 0.00
11/22/2009 0.00
11/23/2009 0.25
11/24/2009 0.98
11/25/2009 0.19
11/26/2009 0.03
11/27/2009 0.12
11/28/2009 0.00
11/29/2009 0.00
11/30/2009 0.32
12/1/2009 0.00
12/2/2009 0.37
12/3/2009 0.98
12/4/2009 0.02
12/5/2009 0.93
12/6/2009 0.00
12/7/2009 0.00
12/8/2009 0.03
12/9/2009 1.69
12/10/2009 0.00
12/11/2009
12/12/2009 0.00
12/13/2009 0.67
12/14/2009 0.01
12/15/2009 0.00
12/16/2009 0.00
12/17/2009 0.00
12/18/2009 0.00
12/19/2009 2.21
12/20/2009 0.00
12/21/2009 0.00
12/22/2009 0.00
12/23/2009 0.00
12/24/2009 0.00
12/25/2009 0.52
12/26/2009 1.10
12/27/2009 0.00
12/28/2009
12/29/2009
12/30/2009
12/31/2009
Day of YearDaily PrcpMultiday Prcp
1/1/2010 0.00
1/2/2010 0.00
1/3/2010 0.00
1/4/2010 0.00
1/5/2010 0.00
1/6/2010 T
1/7/2010
1/8/2010 0.07
1/9/2010
1/10/2010
1/11/2010 T
1/12/2010 0.01
1/13/2010
1/14/2010
1/15/2010
1/16/2010 0.00
1/17/2010 0.77
1/18/2010 0.01
1/19/2010 0.00
1/20/2010 0.01
1/21/2010 0.01
1/22/2010 0.29
1/23/2010 0.00
1/24/2010 T
1/25/2010 0.53
1/26/2010 0.01
1/27/2010
1/28/2010 0.00
1/29/2010 0.00
1/30/2010 0.47
1/31/2010 0.48
2/1/2010
2/2/2010 0.02
2/3/2010 0.25
2/4/2010 0.00
2/5/2010 1.23
2/6/2010 1.64
2/7/2010 0.00
2/8/2010 0.00
2/9/2010 0.45
2/10/2010 0.50
2/11/2010 0.01
2/12/2010 0.00
2/13/2010 0.00
2/14/2010 0.00
2/15/2010 0.05
2/16/2010 0.00
2/17/2010 0.00
2/18/2010 0.00
2/19/2010 0.00
2/20/2010 0.00
2/21/2010 0.00
2/22/2010 0.13
2/23/2010 0.08
2/24/2010 0.01
2/25/2010 0.00
2/26/2010 0.00
2/27/2010 0.00
2/28/2010
3/1/2010 0.00
3/2/2010 0.07
3/3/2010 0.06
3/4/2010
3/5/2010
3/6/2010
3/7/2010
3/8/2010
3/9/2010
3/10/2010
3/11/2010 0.02
3/12/2010 0.71
3/13/2010 0.54
3/14/2010 0.27
3/15/2010 0.17
3/16/2010
3/17/2010
3/18/2010
3/19/2010
3/20/2010
3/21/2010
3/22/2010 0.40
3/23/2010 0.02
3/24/2010 T
3/25/2010 0.01
3/26/2010 0.81
3/27/2010
3/28/2010 1.23
3/29/2010 0.30
3/30/2010 0.23
3/31/2010
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 0.76
4/9/2010 0.24
4/10/2010
4/11/2010
4/12/2010
4/13/2010 0.17
4/14/2010
4/15/2010
4/16/2010 T
4/17/2010
4/18/2010
4/19/2010
4/20/2010
4/21/2010 0.15
4/22/2010
4/23/2010
4/24/2010 0.01
4/25/2010 0.14
4/26/2010 0.30
4/27/2010 0.13
4/28/2010
4/29/2010
4/30/2010 0.22
5/1/2010
5/2/2010
5/3/2010
5/4/2010
5/5/2010
5/6/2010
5/7/2010
5/8/2010
5/9/2010
5/10/2010
5/11/2010 0.10
5/12/2010 0.01
5/13/2010
5/14/2010 0.01
5/15/2010
5/16/2010
5/17/2010 0.72
5/18/2010 0.40
5/19/2010
5/20/2010
5/21/2010
5/22/2010 0.07
5/23/2010 0.37
5/24/2010
5/25/2010
5/26/2010
5/27/2010
5/28/2010
5/29/2010
5/30/2010
5/31/2010
6/1/2010 0.75
6/2/2010
6/3/2010 0.77
6/4/2010
6/5/2010
6/6/2010 0.70
6/7/2010
6/8/2010
6/9/2010 0.02
6/10/2010 0.02
6/11/2010
6/12/2010 0.80
6/13/2010
6/14/2010
6/15/2010 0.12
6/16/2010
6/17/2010
6/18/2010
6/19/2010
6/20/2010
6/21/2010
6/22/2010
6/23/2010 0.08
6/24/2010
6/25/2010
6/26/2010
6/27/2010
6/28/2010 0.15
6/29/2010
6/30/2010
Day of YearDaily PrcpMultiday Prcp
7/1/2010
7/2/2010
7/3/2010
7/4/2010
7/5/2010
7/6/2010
7/7/2010
7/8/2010
7/9/2010
7/10/2010 0.94
7/11/2010
7/12/2010 0.61
7/13/2010 1.93
7/14/2010 1.02
7/15/2010
7/16/2010
7/17/2010
7/18/2010
7/19/2010
7/20/2010 0.28
7/21/2010 0.04
7/22/2010
7/23/2010
7/24/2010
7/25/2010 0.24
7/26/2010
7/27/2010
7/28/2010
7/29/2010 0.10
7/30/2010 0.51
7/31/2010
8/1/2010 0.20
8/2/2010 0.11
8/3/2010 0.00
8/4/2010 0.00
8/5/2010 0.52
8/6/2010 0.00
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 0.90
8/13/2010 0.02
8/14/2010 0.00
8/15/2010 0.71
8/16/2010
8/17/2010
8/18/2010 0.62
8/19/2010
8/20/2010
8/21/2010
8/22/2010
8/23/2010
8/24/2010
8/25/2010
8/26/2010
8/27/2010
8/28/2010
8/29/2010
8/30/2010
8/31/2010
9/1/2010
9/2/2010
9/3/2010
9/4/2010
9/5/2010
9/6/2010
9/7/2010
9/8/2010
9/9/2010
9/10/2010
9/11/2010
9/12/2010 0.46
9/13/2010
9/14/2010
9/15/2010
9/16/2010 0.01
9/17/2010 0.12
9/18/2010
9/19/2010
9/20/2010
9/21/2010
9/22/2010
9/23/2010
9/24/2010
9/25/2010
9/26/2010 0.05
9/27/2010 0.29
9/28/2010 0.02
9/29/2010
9/30/2010 2.39



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
10/13/2009 8:00 AM 0.00 0.0 M M M
10/14/2009 6:30 AM 0.00 0.0 M M M
10/15/2009 12:01 AM 0.01 M M M M
10/16/2009 12:01 AM 0.75 M M M M Rain through out the day.
10/17/2009 12:01 AM 0.52 M M M M Rain all day.
10/18/2009 12:01 AM 1.73 M M M M Rain and fog all day.
10/19/2009 12:01 AM 0.14 M M M M Rain from mid to late morning hours of 10-18-09.
10/20/2009 12:01 AM 0.00 0.0 M M M
10/21/2009 12:01 AM 0.00 0.0 M M M
10/22/2009 12:01 AM 0.00 0.0 M M M
10/23/2009 12:01 AM 0.00 0.0 M M M
10/24/2009 12:01 AM 0.01 M M M M
10/25/2009 12:01 AM 0.56 M M M M Showers during day. Thunder heard in distance late evening.
10/26/2009 12:01 AM 0.00 0.0 M M M
10/27/2009 12:01 AM 0.00 0.0 M M M
10/28/2009 12:01 AM 0.90 M M M M
10/29/2009 12:01 AM 1.55 M M M M
10/30/2009 12:01 AM T M M M M
10/31/2009 12:01 AM 0.30 M M M M
11/1/2009 8:00 PM 0.61 M M M M
11/2/2009 8:00 PM 0.00 0.0 M M M
11/3/2009 8:00 PM 0.00 0.0 M M M
11/4/2009 8:00 PM 0.00 0.0 M M M
11/5/2009 8:00 PM 0.02 M M M M Very light rain.
11/6/2009 8:00 PM 0.00 0.0 M M M
11/7/2009 8:00 PM 0.00 0.0 M M M
11/9/2009 8:00 PM 0.00 0.0 M M M
11/10/2009 8:00 PM 0.00 0.0 M M M
11/11/2009 8:00 PM 1.14 M M M M
11/12/2009 8:00 PM 1.29 M M M M
11/13/2009 8:00 PM 0.90 M M M M
11/14/2009 8:00 PM 0.07 M M M M
11/15/2009 8:00 PM 0.00 0.0 M M M
11/16/2009 8:00 PM 0.00 0.0 M M M
11/17/2009 8:00 PM 0.00 0.0 M M M
11/18/2009 8:00 PM 0.00 0.0 M M M
11/19/2009 8:00 PM 0.25 M M M M
11/20/2009 8:00 PM 0.49 M M M M
11/21/2009 8:00 PM 0.00 0.0 M M M
11/22/2009 8:00 PM 0.00 0.0 M M M
11/23/2009 8:00 PM 0.25 M M M M -RA all day
11/24/2009 8:00 PM 0.98 M M M M Fog at obs
11/25/2009 8:00 PM 0.19 M M M M
11/26/2009 7:20 PM 0.03 M M M M Mist and heavy fog during the day.
11/27/2009 8:00 PM 0.12 T T 0.0 0.00 From 12:40 to 12:45 pm had strong winds with ice pellets, snow pellets, and small hail. PWG 42 MPH WNW 0.12 pcpn was from the evening of 11/26 and afternoon of the 27th
11/28/2009 8:00 PM 0.00 0.0 M M M
11/29/2009 8:00 PM 0.00 0.0 M M M
11/30/2009 8:00 PM 0.32 M M M M
12/1/2009 8:00 PM 0.00 0.0 M M M
12/2/2009 8:00 PM 0.37 M M M M
12/3/2009 8:00 PM 0.98 M M M M
12/4/2009 8:00 PM 0.02 M M M M
12/5/2009 8:00 PM 0.93 2.5 0.00 3.0 M R began at 6 a.m. 12/5/2009 and continued until 11:25 a.m. when it switched to all snow. Snow continued until 7:40 p.m. that day. Liquid equivalent of 24 hour snowfall accumulation was undeterminable because rain was mixed with snow in the rain gauge. Melted value of total depth of snow and ice on the ground was unavailable -- primary observer not present to take core sample measurement.
12/6/2009 8:00 PM 0.00 0.0 M 1.0 0.33 Ground about 60 percent covered in snow.
12/7/2009 8:00 PM 0.00 0.0 M T M
12/8/2009 8:00 PM 0.03 M M M M Rain continued after 8 p.m. obs.
12/9/2009 8:00 AM 1.69 M M M M This is an early report due to the heavy rain overnight. After my 8 p.m. obs last night, 1.69" of R fell, primarily before midnight (1.15) but also continuing into morning. Total precip for this event was 1.72".
12/10/2009 8:00 PM 0.00 0.0 M M M
12/12/2009 8:00 PM 0.00 0.0 M M M
12/13/2009 8:00 PM 0.67 M M M M Rain off and on through out the day started about 4:50 am. -F in morning, F in afternon, and +Fog in evening.
12/14/2009 8:00 PM 0.01 M M M M Heavy fog this a.m.
12/15/2009 8:00 PM 0.00 0.0 M M M Mild, pleasant day.
12/16/2009 8:00 PM 0.00 0.0 M M M Partly sunny and windy. Max 41
12/17/2009 8:00 PM 0.00 0.0 M M M
12/18/2009 8:00 PM 0.00 0.0 M M M Correction: 3" of snow fell between and 8 pm and midnight.
12/19/2009 11:59 PM 2.21 24.2 2.21 24.0 2.21 Corrected Report making 11:59 pm the obs time for 12/19/2009. Snow measurements were taken starting at 11:59 pm 12/18/2009 and every 6 hours thereafter until 11:59 pm 12/19/2009. The snowboard was wiped clean of snow after every measurement Snow began 8:15 pm 12/18/2009. The snow continued over night and all day. Snow continues to this observation and is coming down nowas light snow.
12/20/2009 8:00 PM 0.00 0.0 M 14.0 1.79 Melted value from core sample was 1.79".
12/21/2009 8:00 PM 0.00 0.0 M 12.0 1.75
12/22/2009 8:00 PM 0.00 0.0 M 10.0 M Unable to get a good core sample.
12/23/2009 8:00 PM 0.00 0.0 M 8.0 M
12/24/2009 8:00 PM 0.00 0.0 M 6.0 M
12/25/2009 8:00 PM 0.52 M M 1.0 M Currently 60 percent of ground has a shallow snow/ice cover.
12/26/2009 8:00 PM 1.10 M M 0.0 M
12/27/2009 8:00 PM 0.00 0.0 M M M
1/1/2010 8:00 PM 0.00 0.0 M M M Mostly cloudy day with a high of 46. -FG in am. Winds from the NW began picking up in late afternoon.
1/2/2010 8:00 PM 0.00 0.0 M M M Mostly cloudy day with periods of bright sunshine. . Blustery all day with a PWG of 40 mph from the West. Had WCI in the negative single digits.
1/3/2010 8:00 PM 0.00 0.0 M M M Cold with gusty winds all day.
1/4/2010 8:00 PM 0.00 0.0 M M M
1/5/2010 8:00 PM 0.00 0.0 M M M
1/6/2010 8:00 PM T T T M M Snow flurries at 8:35 am. Snow melted as it fell.
1/8/2010 8:00 PM 0.07 1.5 0.07 1.0 0.05
1/11/2010 8:00 PM T T T T T -Snow at obs
1/12/2010 7:00 AM 0.01 0.2 0.10 M M -S for approx. 1 and 1/2 evening of Jan 11, 2010. Snow covered deck and part of road.
1/16/2010 8:00 PM 0.00 0.0 M M M
1/17/2010 8:00 PM 0.77 M M M M
1/18/2010 8:00 PM 0.01 M M M M rain occurred at 12:15 am 1/17
1/19/2010 8:00 PM 0.00 0.0 M M M
1/20/2010 8:00 PM 0.01 M M M M Unknown precip at approx. 9 a.m.
1/21/2010 8:00 PM 0.01 T T M M Short period of sleet at about 6:30 pm. Ltg rain at obs.
1/22/2010 8:00 PM 0.29 T T M M rain mixed with sleet during the day
1/23/2010 8:00 PM 0.00 0.0 M M M
1/24/2010 8:00 PM T M M M M Sprinkles at 5:45 7:30 pm.
1/25/2010 8:00 PM 0.53 M M M M
1/26/2010 8:00 PM 0.01 M M M M
1/28/2010 8:00 PM 0.00 0.0 M M M
1/29/2010 8:00 PM 0.00 0.0 M M M
1/30/2010 11:59 PM 0.47 7.4 0.47 7.5 0.47 Snow continued after 1/30/2010 11:59 pm obs.
1/31/2010 6:00 AM 0.48 7.5 0.48 7.5 0.48 Snow began 6 am January 30, 2010, and ended shortly after 1 am January 31, 2010, for a snow storm that produced over 19 hours of contiuous snow.
2/2/2010 8:00 PM 0.02 0.2 0.02 2.5 M All snow fell beginning at 6:15 pm. Ice Pellets also fell from about 7 pm to 7:30 pm. Currently moderate snow. Snow/liquid ratio is 10:1 at this writing.
2/3/2010 8:00 PM 0.25 2.5 0.25 3.0 M Storm began @ 6:15 pm on Tue., 2/2/2010, and ended at 5:05 am 2/3/2010. Ice pellets fell the evening of 2/2. Snow to Liquid Ratio was 10:1.
2/4/2010 8:00 PM 0.00 0.0 M T T About 40 percent of ground is snow covered thus I am reporting a trace.
2/5/2010 8:00 PM 1.23 5.0 0.44 5.0 0.44 Snow grains mixed in with snow. Snow continues.
2/6/2010 8:00 PM 1.64 18.1 1.57 19.0 M Snow continued non-stop from yesterday's obs until approx. 5:45 pm today. At times during the afternoon very heavy snow fell with a visibility of about 300 to 400' SWE shown below is from 8" heated tipping bucket rain gauge.
2/7/2010 8:00 PM 0.00 0.0 M 13.0 M
2/8/2010 8:00 PM 0.00 0.0 M 12.0 M
2/9/2010 11:59 PM 0.45 3.5 0.45 15.5 M Snow began @ 4:45 pm. Mixed with FZ and IP later. Measurement was made at 0030 2/10/2010. Snow and FZ continued after midnight.
2/10/2010 8:00 PM 0.50 7.3 0.50 19.5 3.42 Snow began 4:45 pm 2/9/2010 and ended 2:20 pm 2/10/2010. In additional to snow, FZ, IP, and -R fell during storm. Under blizzard warning for most of today. Visibility limited to 400'@ one point. Peak Wind Gust so far today is 34 mph from the W.
2/11/2010 8:00 PM 0.01 0.1 M M M
2/12/2010 8:00 PM 0.00 0.0 M M M
2/13/2010 8:00 PM 0.00 0.0 M M M
2/14/2010 8:00 PM 0.00 0.0 M 14.0 M
2/15/2010 8:00 PM 0.05 T T M M Alberta Clipper from -S and -R and BR between 2:25 and 6 pm. Only a T of snow fell.
2/16/2010 8:00 PM 0.00 0.0 M M M
2/17/2010 8:00 PM 0.00 0.0 M M M
2/18/2010 8:00 PM 0.00 0.0 M M M
2/19/2010 8:00 PM 0.00 0.0 M M M
2/20/2010 8:00 PM 0.00 0.0 M 7.0 M Over 60% of the ground still covered with snow.
2/21/2010 8:00 PM 0.00 0.0 M 5.0 M
2/22/2010 8:00 PM 0.13 M M T M Less than 50% of ground covered with snow due to rain.
2/23/2010 8:00 PM 0.08 M M T M Rain carried over from 2/22/2010. Fog
2/24/2010 8:00 PM 0.01 0.0 M M M
2/25/2010 8:00 PM 0.00 0.0 M M M
2/26/2010 8:00 PM 0.00 0.0 M M M
2/27/2010 8:00 PM 0.00 0.0 M M M
3/1/2010 11:59 PM 0.00 0.0 M M M
3/2/2010 11:59 PM 0.07 T T M M -RB approx. 4:45 pm and contined through midnight. Some snowflakes mixed in w/ rain.
3/3/2010 11:59 PM 0.06 M M M M
3/11/2010 11:59 PM 0.02 M M M M
3/12/2010 11:59 PM 0.71 M M M M
3/13/2010 11:59 PM 0.54 M M M M
3/14/2010 11:59 PM 0.27 M M M M
3/15/2010 11:59 PM 0.17 M M M M
3/22/2010 11:59 PM 0.40 M M M M
3/23/2010 11:59 PM 0.02 M M M M
3/24/2010 11:59 PM T M M M M
3/25/2010 11:59 PM 0.01 M M M M
3/26/2010 11:59 PM 0.81 M M M M
3/28/2010 11:59 PM 1.23 M M M M
3/29/2010 11:59 PM 0.30 M M M M
3/30/2010 11:59 PM 0.23 M M M M
4/1/2010 11:59 PM 0.00 0.0 M M M Completely sunny with light winds. DPs mid-40’s. Avg. wind speed 1.5 mph. PWG 11 E.
4/2/2010 11:59 PM 0.00 0.0 M M M Completely sunny am with CI clouds in aftn. Left-side split parhelion @ 6:09 pm (See bottom of page). DPs upper 40s. Avg. wind speed 2.9 mph, PWG 17 ENE. Mowed law for the first time this season.
4/3/2010 11:59 PM 0.00 0.0 M M M Low (est. 015) marine layer OVC am w/ -F. PS @ approx. 10:10 a.m. Hi thin OVC remainder of the day w/ light but occasionally gusts of wind. Wind speed avg. 2.7 mph w/ a PWG of 21 mph from the East.
4/4/2010 11:59 PM 0.00 0.0 M M M Easter Sunday started out partly sunny with BKN CI clouds. Patches of high AS passed through the afternoon keeping the W/m2 lower than usually. DPs mid upper 40s. FROPA in evening.
4/5/2010 11:59 PM 0.00 0.0 M M M OVC in am becoming partly sunny and then mostly sunny by 4 p.m. Humidity up on SE winds. DPs low to upper 50s.
4/6/2010 11:59 PM 0.00 0.0 M M M Sprinkles @ approx. 7 a.m. High thin OVC during day. Brutally hot. 4.6 mph avg. wind speed. PWG 23 SW. Max DP 62°
4/7/2010 11:59 PM 0.00 0.0 M M M Similar to 4/6 except no sprinkles and a little drier. High thin OVC. 5.6 mph avg wind speed. PWG 23 SW. Max DP 55°
4/8/2010 11:59 PM 0.76 M M M M Partly cloudy a.m. Sky became chaotic during the day with clouds at the 3 major levels; however, mostly sunny skies prevailed with a 884W/2 solar radiation max. Small patches of wave clouds noted prior to noon. SW winds gusting in the 20-30 mph range during day. DPs in upper 40s to upper 50s. Clouding over by 4 p.m. RB 7:45 p.m. due to FROPA. Thunder heard at 7:50 p.m. –R from 8 to 8:40 p.m. w/ break. RB again approx. @ 9:30 p.m. becoming moderate and continuing to obs time and beyond. Heavy pollen in the air through out the day. Overall, a pleasant, dry, windy day with an average wind speed of 7.2 mph and PWG of 34 mph out of the SW.
4/9/2010 11:59 PM 0.24 M M M M
4/13/2010 11:59 PM 0.17 M M M M
4/16/2010 11:59 PM T M M M M
4/21/2010 11:59 PM 0.15 M M M M
4/24/2010 11:59 PM 0.01 M M M M
4/25/2010 11:59 PM 0.14 M M M M
4/26/2010 11:59 PM 0.30 M M M M
4/27/2010 8:00 PM 0.13 M M M M
4/30/2010 11:59 PM 0.22 M M M M
5/11/2010 9:00 PM 0.10 M M M M
5/12/2010 9:00 PM 0.01 M M M M
5/14/2010 9:00 PM 0.01 M M M M
5/17/2010 11:59 PM 0.72 M M M M
5/18/2010 9:00 PM 0.40 M M M M
5/22/2010 11:59 PM 0.07 M M M M
5/23/2010 9:00 PM 0.37 M M M M
6/1/2010 9:00 PM 0.75 M M M M TRW+ with CCCG lightning.
6/3/2010 9:00 PM 0.77 M M M M TRW+ 5:30-6:30 p.m.
6/6/2010 9:00 PM 0.70 M M M M TRW between approx 4 and 5 p.m.
6/9/2010 9:00 PM 0.02 M M M M
6/10/2010 9:00 PM 0.02 M M M M
6/12/2010 9:00 PM 0.80 M M M M
6/15/2010 8:00 AM 0.12 M M M M June 14: Light shower (.02) early afternoon with a stronger shower (.10) about 9 p.m.
6/23/2010 6:00 AM 0.08 M M M M TRW+ w/ CCCG LIG struck between 8:15 and 8:30 p.m. on 6/22/2010 causing much small limb and tree damage. One tree down behind my house. PWG of 39 mph from the SW just before 8:20 pm. According to the Charles County Fire and Police scanner, damage occurred from western Charles County to Waldorf (middle of County). Further damage in the eastern side of the County may have also occurred. Reports of trees and electric lines down and one house fire where heard on the scanner.
6/28/2010 8:00 PM 0.15 M M M M Shower associated w/ a TRW that passed north of this station.
7/10/2010 8:00 PM 0.94 M M M M Light shower began approx 3 a.m. Rain became heavy between 11 a.m. and noon.
7/12/2010 8:00 PM 0.61 M M M M TRW in aftn. with CC Ligthning
7/13/2010 8:15 PM 1.93 M M M M Heavy rain between 12:30 and 1:30 a.m. produced 1.59" of precipitation. TRW dropped 0.34" between 8:05p and 8:15p for a daily rain total of 1.93"
7/14/2010 8:00 PM 1.02 M M M M TRW after obs last evening.
7/20/2010 8:00 PM 0.28 M M M M 7/19 TRW 9:20 pm. to after midnight 7/20 = .026 7/20 8 pm light rain .02
7/21/2010 8:00 PM 0.04 M M M M Rain continued after 7/20 8 p.m. obs and lasted until 9:10 p.m.
7/25/2010 8:00 PM 0.24 M M M M TRW+ from 3:50 pm to 4:50 pm caused 1 tree collapse but mostly small limb and leaf damaged. One strong bolt of lightning hit between 1/4 to 1/2 mile from station at around 3:50 pm. Peak wind gust was 40 mph from the west at 4:05 p.m. Temp at 3:50 pm was 100 and at 4:50 pm 76 for a 1 hour drop of 24 degrees.
7/29/2010 8:00 PM 0.10 M M M M 20 minute(intermittent) shower but no thunder
7/30/2010 8:00 PM 0.51 M M M M Hard rain continued after my 8 p.m. obs and ended just after midnight.
8/1/2010 8:00 PM 0.20 M M M M Gentle rain between 1 and 3 a.m. accumulated 0.19" of pcpn. Sprinkles in the mid-afternoon accumulated 0.01" ofpcpn
8/2/2010 8:00 PM 0.11 M M M M Very light rain intermittently for 3 hours in the a.m.
8/3/2010 8:00 PM 0.00 0.0 M M M
8/4/2010 8:00 PM 0.00 0.0 M M M
8/5/2010 8:00 PM 0.52 M M M M TRW PK WND 29 mph
8/6/2010 8:00 PM 0.00 0.0 M M M
8/7/2010 8:00 PM 0.00 0.0 M M M
8/8/2010 8:00 PM 0.00 0.0 M M M
8/9/2010 8:00 PM 0.00 0.0 M M M
8/10/2010 8:00 PM 0.00 0.0 M M M
8/11/2010 8:00 PM 0.00 0.0 M M M
8/12/2010 8:00 PM 0.90 M M M M Three separate storms passed through on Thur. August 12, 2010. The first and largest was a TRW+ w/ CCCG lightning and an outflow boundary peak gust from the ENE of 20 mph @ 8:15 am. Over 6 tenths of an inch fell in the gauge between 8:35 - 8:50 am, and solar radiation dropped to zero causing outside street lights came on. The second occurred between 4:35 - 4:50 pm and the last between 7:15 - and 7:50 pm. Total precipitation was 0.90 at the 8 pm obs. No damage to any trees or property from the storms. Marty Brumback Observer
8/13/2010 8:00 PM 0.02 M M M M
8/14/2010 8:00 PM 0.00 0.0 M M M
8/15/2010 8:00 PM 0.71 M M M M R began at 10 a.m. and continued to 10:50 a.m. Rain began again @ about 11:50 a.m. and continued to about 1:40 p.m. with some slowing down for periods of time. Between 10:09 and 10:10 a.m. the rain was the heaviest falling at a rate of 2.01 inches per hour.
8/18/2010 8:00 PM 0.62 M M M M
9/12/2010 8:00 PM 0.46 M M M M Rain overnight into early morning hours. No flooding.
9/16/2010 8:00 PM 0.01 M M M M Very light rain began at 4:30 P.M. in advance of a cold front. Mist continues at obs.
9/17/2010 8:00 PM 0.12 M M M M Rain in early morning hours.
9/26/2010 8:00 PM 0.05 M M M M Not at home when rain fell prior to obs time.
9/27/2010 8:00 PM 0.29 M M M M Light rain through out the day.
9/28/2010 8:00 PM 0.02 M M M M -R around 2 a.m. and then 6 a.m.
9/30/2010 8:00 PM 2.39 M M M M Intermittent rain with heavy rain+ at times through out the day. Light rain falling at time of obs.



Start Date End Date & Time Duration in Days Precipitation Snow Depth Snow Depth SWE Notes
10/1/2009 10/13/2009 8:00 AM 13 0.00 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