Station Overview Station Location
Station Number MD-AA-37 Latitude 39.1344
Station Name Green Haven 0.4 ESE Longitude -76.5328
County Anne Arundel Elevation (ft) 59



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 3.52 10.15 11 10.15 11 0.00 0 0 11 0 0.0 0 0
Nov 10 3.38 2.12 7 2.12 7 0.00 0 0 7 0 0.0 0 0
Dec 10 3.44 1.70 4 1.70 4 0.00 0 0 4 0 1.1 1 1
Jan 11 3.20 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Feb 11 2.86 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
March 11 3.93 2.53 2 2.53 2 0.00 0 0 2 0 0.0 0 0
April 11 3.44 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
May 11 4.30 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
June 11 3.60 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
July 11 4.09 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Aug 11 3.38 16.38 12 16.38 12 0.00 0 0 12 0 0.0 0 0
Sept 11 3.99 12.24 12 12.24 12 0.00 0 0 12 0 0.0 0 0
Water Year Totals: 43.13" 45.12" 48 days 45.12" 48 0.00" 0 days 0 48 days 0 days 1.1" 1 days 1 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 7.12
10/2/2010
10/3/2010
10/4/2010 0.56
10/5/2010 0.39
10/6/2010 0.05
10/7/2010 0.01
10/8/2010
10/9/2010
10/10/2010
10/11/2010
10/12/2010
10/13/2010
10/14/2010
10/15/2010 0.74
10/16/2010
10/17/2010
10/18/2010
10/19/2010 0.11
10/20/2010 0.01
10/21/2010 0.02
10/22/2010
10/23/2010
10/24/2010
10/25/2010
10/26/2010
10/27/2010 0.61
10/28/2010 0.53
10/29/2010
10/30/2010
10/31/2010
11/1/2010
11/2/2010
11/3/2010
11/4/2010 0.58
11/5/2010 0.86
11/6/2010
11/7/2010
11/8/2010
11/9/2010
11/10/2010
11/11/2010
11/12/2010
11/13/2010
11/14/2010
11/15/2010
11/16/2010 0.26
11/17/2010 0.36
11/18/2010
11/19/2010
11/20/2010
11/21/2010
11/22/2010
11/23/2010
11/24/2010
11/25/2010 0.02
11/26/2010 0.03
11/27/2010 0.01
11/28/2010
11/29/2010
11/30/2010
12/1/2010 0.41
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 0.60
12/13/2010 0.61
12/14/2010
12/15/2010
12/16/2010
12/17/2010
12/18/2010
12/19/2010
12/20/2010
12/21/2010
12/22/2010
12/23/2010
12/24/2010
12/25/2010
12/26/2010
12/27/2010 0.08
12/28/2010
12/29/2010
12/30/2010
12/31/2010
Day of YearDaily PrcpMultiday Prcp
1/1/2011
1/2/2011
1/3/2011
1/4/2011
1/5/2011
1/6/2011
1/7/2011
1/8/2011
1/9/2011
1/10/2011
1/11/2011
1/12/2011
1/13/2011
1/14/2011
1/15/2011
1/16/2011
1/17/2011
1/18/2011
1/19/2011
1/20/2011
1/21/2011
1/22/2011
1/23/2011
1/24/2011
1/25/2011
1/26/2011
1/27/2011
1/28/2011
1/29/2011
1/30/2011
1/31/2011
2/1/2011
2/2/2011
2/3/2011
2/4/2011
2/5/2011
2/6/2011
2/7/2011
2/8/2011
2/9/2011
2/10/2011
2/11/2011
2/12/2011
2/13/2011
2/14/2011
2/15/2011
2/16/2011
2/17/2011
2/18/2011
2/19/2011
2/20/2011
2/21/2011
2/22/2011
2/23/2011
2/24/2011
2/25/2011
2/26/2011
2/27/2011
2/28/2011
3/1/2011
3/2/2011
3/3/2011
3/4/2011
3/5/2011
3/6/2011
3/7/2011
3/8/2011
3/9/2011
3/10/2011 0.61
3/11/2011 1.92
3/12/2011
3/13/2011
3/14/2011
3/15/2011
3/16/2011
3/17/2011
3/18/2011
3/19/2011
3/20/2011
3/21/2011
3/22/2011
3/23/2011
3/24/2011
3/25/2011
3/26/2011
3/27/2011
3/28/2011
3/29/2011
3/30/2011
3/31/2011
Day of YearDaily PrcpMultiday Prcp
4/1/2011
4/2/2011
4/3/2011
4/4/2011
4/5/2011
4/6/2011
4/7/2011
4/8/2011
4/9/2011
4/10/2011
4/11/2011
4/12/2011
4/13/2011
4/14/2011
4/15/2011
4/16/2011
4/17/2011
4/18/2011
4/19/2011
4/20/2011
4/21/2011
4/22/2011
4/23/2011
4/24/2011
4/25/2011
4/26/2011
4/27/2011
4/28/2011
4/29/2011
4/30/2011
5/1/2011
5/2/2011
5/3/2011
5/4/2011
5/5/2011
5/6/2011
5/7/2011
5/8/2011
5/9/2011
5/10/2011
5/11/2011
5/12/2011
5/13/2011
5/14/2011
5/15/2011
5/16/2011
5/17/2011
5/18/2011
5/19/2011
5/20/2011
5/21/2011
5/22/2011
5/23/2011
5/24/2011
5/25/2011
5/26/2011
5/27/2011
5/28/2011
5/29/2011
5/30/2011
5/31/2011
6/1/2011
6/2/2011
6/3/2011
6/4/2011
6/5/2011
6/6/2011
6/7/2011
6/8/2011
6/9/2011
6/10/2011
6/11/2011
6/12/2011
6/13/2011
6/14/2011
6/15/2011
6/16/2011
6/17/2011
6/18/2011
6/19/2011
6/20/2011
6/21/2011
6/22/2011
6/23/2011
6/24/2011
6/25/2011
6/26/2011
6/27/2011
6/28/2011
6/29/2011
6/30/2011
Day of YearDaily PrcpMultiday Prcp
7/1/2011
7/2/2011
7/3/2011
7/4/2011
7/5/2011
7/6/2011
7/7/2011
7/8/2011
7/9/2011
7/10/2011
7/11/2011
7/12/2011
7/13/2011
7/14/2011
7/15/2011
7/16/2011
7/17/2011
7/18/2011
7/19/2011
7/20/2011
7/21/2011
7/22/2011
7/23/2011
7/24/2011
7/25/2011
7/26/2011
7/27/2011
7/28/2011
7/29/2011
7/30/2011
7/31/2011
8/1/2011
8/2/2011 0.19
8/3/2011
8/4/2011 0.52
8/5/2011
8/6/2011
8/7/2011
8/8/2011 0.04
8/9/2011
8/10/2011 0.16
8/11/2011
8/12/2011
8/13/2011
8/14/2011 0.40
8/15/2011 0.26
8/16/2011 3.13
8/17/2011
8/18/2011
8/19/2011 2.82
8/20/2011 1.59
8/21/2011
8/22/2011 1.78
8/23/2011
8/24/2011
8/25/2011
8/26/2011 0.15
8/27/2011
8/28/2011 5.34
8/29/2011
8/30/2011
8/31/2011
9/1/2011
9/2/2011
9/3/2011 0.01
9/4/2011
9/5/2011 0.05
9/6/2011 1.91
9/7/2011 1.84
9/8/2011 4.74
9/9/2011 1.34
9/10/2011
9/11/2011
9/12/2011 0.26
9/13/2011
9/14/2011
9/15/2011
9/16/2011 0.16
9/17/2011
9/18/2011
9/19/2011
9/20/2011
9/21/2011 0.07
9/22/2011 0.01
9/23/2011 0.04
9/24/2011 1.81
9/25/2011
9/26/2011
9/27/2011
9/28/2011
9/29/2011
9/30/2011



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
10/1/2010 7:00 AM 7.12 M M M M Moderate to very heavy rain continued through 2:35AM with only a short break between 3:20PM and 5:20PM; Heaviest rain occurred between 6:50AM and 9:50AM where 3.18" of rain was measured; Peak instantaneous rainfall rate of 7.68"/hr at 9:38AM; Calendar day total of 8.60", 24 hour total of 9.05" and storm total of 9.19" are all all-time records not only in this stations history (Records began August 2002) but also that I've ever seen; Numerous basements flooded in my community (including my own) and a 500 sq. foot sink hole occurred 5 houses down from me near storm water management pit
10/4/2010 7:00 AM 0.56 M M M M Light rain began around 6:15PM and periods of light to moderate (very briefly heavy) continued through observation time; Peak instantaneous rainfall rate of 0.31"/hr at 10:47PM; Overnight min - 51
10/5/2010 7:00 AM 0.39 0.0 M M M Periods of light to moderate rain continued until around 2:30PM; Peak instantaneous rainfall rate of 0.15"/hr at 1:25PM; Storm total of 0.95"; Overnight min - 50
10/6/2010 7:00 AM 0.05 M M M M Brief light showers around 3:15AM and once again around 4:30AM; Peak instantaneous rainfall rate of 0.11"/hr at 4:32AM; Overnight min - 49
10/7/2010 7:00 AM 0.01 M M M M Brief shower around 10:45PM; Overnight min - 51
10/15/2010 7:00 AM 0.74 M M M M Light rain began around 8:00AM and became steady with periods of moderate to heavy rain throughout the day; Peak instantaneous rainfall rate of 1.11"/hr at 1:16PM; Overnight min - 45
10/19/2010 7:00 AM 0.11 M M M M Brief thunderstorm between 2:25AM and 2:35AM; Scattered light rain continued from then through observation time; Peak instantaneous rainfall rate of 1.27"/hr at 2:27AM; Overnight min - 50
10/20/2010 7:00 AM 0.01 M M M M Light rain ended around 7:45AM; Overnight min - 45
10/21/2010 7:00 AM 0.02 M M M M Brief period of light rain between 2:30PM and 2:55PM; Overnight min - 44
10/27/2010 7:00 AM 0.61 M M M M Light rain began around 2:00AM and became steadier and heavier through observation time; Overnight min - 69
10/28/2010 7:00 AM 0.53 M M M M Light rain ended around 9:20AM followed by a period of heavy rain between 1:00PM and 2:20PM; Peak instantaneous rainfall rate of 2.61"/hr at 1:20PM
11/4/2010 7:00 AM 0.58 M M M M Light rain began around 11:20AM and became steadier and heavier throughout the night and into the morning; Overnight min - 47
11/5/2010 7:00 AM 0.86 M M M M Periods of moderate to heavy rain continued from observation time through 6:30PM; Overnight min - 45
11/16/2010 7:00 AM 0.26 M M M M Light rain began around 10:10PM and continued periodically with a few periods of moderate rain through observation time; Peak instantaneous rainfall rate of 0.16"/hr at 12:10AM; Overnight min - 48
11/17/2010 7:00 AM 0.36 M M M M Periods of light rain throughout the day followed by a thunderstorm with brief heavy rain between 1:20AM and 1:30AM; Peak instantaneous rainfall rate of 4.61"/hr at 1:24AM; Overnight min - 56
11/25/2010 7:00 AM 0.02 M M M M A few periods of light rain between 5:35AM and 6:30AM; Overnight min - 41
11/26/2010 7:00 AM 0.03 M M M M A few brief showers between 7:10AM and 7:35AM and once again around 6:30AM; Overnight min - 53
11/27/2010 7:00 AM 0.01 M M M M Brief shower around 1:15PM; Overnight min - 32
12/1/2010 7:00 AM 0.41 M M M M A few periods of rain yesterday mostly between 9:05AM and 9:45AM and once again between 7:50PM and 11:30PM; Isolated showers overnight followed by steadier and heavier rain between 6:10AM and observation time; Peak instantaneous rainfall rate of 1.05"/hr at 6:50AM; Overnight min - 58
12/12/2010 7:00 AM 0.60 M M M M Light rain developed around 6:50PM and increased in intensity through the overnight hours and continuing through observation time; Peak instantaneous rainfall rate of 0.36"/hr at 4:48AM; Overnight min - 36
12/13/2010 7:00 AM 0.61 T M M M A few periods of light rain between 7:00AM and 9:30AM; Rain developed over area around 1:15PM and continued moderately through 6:50PM; Light snow developed and continued intermittently through the early morning hours; Peak instantaneous rainfall rate of 0.22"/hr at 6:40PM; Overnight min - 34
12/27/2010 7:00 AM 0.08 1.1 M 1.0 M Light snow began around mid morning and continued through 12:30AM; Overnight min - 26
3/10/2011 7:00 AM 0.61 M M M M Light rain began around 11:25PM and became steadier throughout the night; Peak instantaneous rainfall rate of 0.22"/hr at 5:50AM; Overnight min - 45
3/11/2011 7:00 AM 1.92 M M M M Steady moderate to locally heavy rain continued throughout the day to 4:55PM followed by several periods of rain from then until 10:45PM; Peak instantaneous rainfall rate of 12:55PM; Storm total of 2.53"; Overnight min - 42
8/2/2011 7:00 AM 0.19 M M M M
8/4/2011 7:00 AM 0.52 M M M M
8/8/2011 7:00 AM 0.04 M M M M
8/10/2011 7:00 AM 0.16 M M M M
8/14/2011 7:00 AM 0.40 M M M M
8/15/2011 7:00 AM 0.26 M M M M
8/16/2011 7:00 AM 3.13 M M M M Incredible dump of rain between 6:50AM and 8:35AM where 2.78" of rain fell and 1.79" (2.31") fell in a 20 minute (one hour) period; A second period of thunderstorms moved into area during the afternoon hours
8/19/2011 7:00 AM 2.82 M M M M Several periods of heavy convection from roughly 3:55PM to 8:10PM; Peak hourly rainfall between 4:20PM and 5:20PM where 1.64" fell
8/20/2011 7:00 AM 1.59 M M M M A brief heavy shower between 5:30PM and 5:40PM followed by a heavy thunderstorm between 6:25PM and 7:00PM
8/22/2011 7:00 AM 1.78 M M M M Several rounds of convection beginning around 1:15PM and ending around 4:05PM
8/26/2011 7:00 AM 0.15 M M M M A few brief moderate to heavy showers between 12:50PM and 1:55PM and again between 3:55PM and 4:05PM
8/28/2011 7:00 AM 5.34 M M M M Rain began around 11:15AM and continued mostly moderate to locally heavy until tapering off around 3:50AM; Power flickered several times but no prolonged outages; Some minor damage in area which includes several trees and large tree limbs down
9/3/2011 7:00 AM 0.01 M M M M
9/5/2011 7:00 AM 0.05 M M M M Brief heavy shower around 1:45AM
9/6/2011 7:00 AM 1.91 M M M M Periods of moderate to heavy rain beginning around 2:40PM and lasting through the 3:45AM
9/7/2011 7:00 AM 1.84 M M M M Periods of moderate to heavy rain through entire day
9/8/2011 7:00 AM 4.74 M M M M Periods of moderate to heavy rain throughout most of the day; Very heavy rain developed around midnight and lasted through 2:00AM
9/9/2011 7:00 AM 1.34 M M M M Periods of moderate to heavy rain throughout day with a few rumbles of thunder
9/12/2011 7:00 AM 0.26 M M M M Several brief rounds of showers and thunderstorms beginning late afternoon and continuing through late evening
9/16/2011 7:00 AM 0.16 M M M M
9/21/2011 7:00 AM 0.07 M M M M
9/22/2011 7:00 AM 0.01 M M M M
9/23/2011 7:00 AM 0.04 M M M M
9/24/2011 7:00 AM 1.81 M M M M Periods of moderate to heavy rain began around 9:15AM before ending around 7:30PM



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