Station Overview Station Location
Station Number MD-SM-18 Latitude 38.4852826
Station Name Mechanicsville 3.8 N Longitude -76.7339102
County St. Mary's Elevation (ft) 120



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 18 3.65 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Nov 18 3.47 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Dec 18 3.48 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Jan 19 3.30 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Feb 19 2.94 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
March 19 4.09 0.00 4 0.00 4 0.00 0 0 0 0 0.0 0 0
April 19 3.49 1.81 30 1.81 30 0.00 0 0 10 1 0.0 0 0
May 19 4.27 4.17 31 4.17 31 0.00 0 0 10 2 0.0 0 0
June 19 3.75 5.45 30 5.45 30 0.00 0 0 13 0 0.0 0 0
July 19 4.17 7.56 31 7.56 31 0.00 0 0 8 0 0.0 0 0
Aug 19 3.76 4.92 31 4.92 31 0.00 0 0 7 3 0.0 0 0
Sept 19 4.08 0.55 30 0.55 30 0.00 0 0 6 1 0.0 0 0
Water Year Totals: 44.45" 24.46" 187 days 24.46" 187 0.00" 0 days 0 54 days 7 days 0.0" 0 days 0 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
10/1/2018
10/2/2018
10/3/2018
10/4/2018
10/5/2018
10/6/2018
10/7/2018
10/8/2018
10/9/2018
10/10/2018
10/11/2018
10/12/2018
10/13/2018
10/14/2018
10/15/2018
10/16/2018
10/17/2018
10/18/2018
10/19/2018
10/20/2018
10/21/2018
10/22/2018
10/23/2018
10/24/2018
10/25/2018
10/26/2018
10/27/2018
10/28/2018
10/29/2018
10/30/2018
10/31/2018
11/1/2018
11/2/2018
11/3/2018
11/4/2018
11/5/2018
11/6/2018
11/7/2018
11/8/2018
11/9/2018
11/10/2018
11/11/2018
11/12/2018
11/13/2018
11/14/2018
11/15/2018
11/16/2018
11/17/2018
11/18/2018
11/19/2018
11/20/2018
11/21/2018
11/22/2018
11/23/2018
11/24/2018
11/25/2018
11/26/2018
11/27/2018
11/28/2018
11/29/2018
11/30/2018
12/1/2018
12/2/2018
12/3/2018
12/4/2018
12/5/2018
12/6/2018
12/7/2018
12/8/2018
12/9/2018
12/10/2018
12/11/2018
12/12/2018
12/13/2018
12/14/2018
12/15/2018
12/16/2018
12/17/2018
12/18/2018
12/19/2018
12/20/2018
12/21/2018
12/22/2018
12/23/2018
12/24/2018
12/25/2018
12/26/2018
12/27/2018
12/28/2018
12/29/2018
12/30/2018
12/31/2018
Day of YearDaily PrcpMultiday Prcp
1/1/2019
1/2/2019
1/3/2019
1/4/2019
1/5/2019
1/6/2019
1/7/2019
1/8/2019
1/9/2019
1/10/2019
1/11/2019
1/12/2019
1/13/2019
1/14/2019
1/15/2019
1/16/2019
1/17/2019
1/18/2019
1/19/2019
1/20/2019
1/21/2019
1/22/2019
1/23/2019
1/24/2019
1/25/2019
1/26/2019
1/27/2019
1/28/2019
1/29/2019
1/30/2019
1/31/2019
2/1/2019
2/2/2019
2/3/2019
2/4/2019
2/5/2019
2/6/2019
2/7/2019
2/8/2019
2/9/2019
2/10/2019
2/11/2019
2/12/2019
2/13/2019
2/14/2019
2/15/2019
2/16/2019
2/17/2019
2/18/2019
2/19/2019
2/20/2019
2/21/2019
2/22/2019
2/23/2019
2/24/2019
2/25/2019
2/26/2019
2/27/2019
2/28/2019
3/1/2019
3/2/2019
3/3/2019
3/4/2019
3/5/2019
3/6/2019
3/7/2019
3/8/2019
3/9/2019
3/10/2019
3/11/2019
3/12/2019
3/13/2019
3/14/2019
3/15/2019
3/16/2019
3/17/2019
3/18/2019
3/19/2019
3/20/2019
3/21/2019
3/22/2019
3/23/2019
3/24/2019
3/25/2019
3/26/2019
3/27/2019 0.00
3/28/2019 0.00
3/29/2019 0.00
3/30/2019
3/31/2019 0.00
Day of YearDaily PrcpMultiday Prcp
4/1/2019 0.01
4/2/2019 0.00
4/3/2019 0.03
4/4/2019 0.00
4/5/2019 T
4/6/2019 0.19
4/7/2019 0.00
4/8/2019 0.00
4/9/2019 0.11
4/10/2019 0.00
4/11/2019 0.00
4/12/2019 0.00
4/13/2019 0.57
4/14/2019 0.00
4/15/2019 0.33
4/16/2019 0.00
4/17/2019 0.00
4/18/2019 0.00
4/19/2019 0.00
4/20/2019 0.28
4/21/2019 0.00
4/22/2019 0.00
4/23/2019 0.00
4/24/2019 0.00
4/25/2019 0.00
4/26/2019 0.03
4/27/2019 0.21
4/28/2019 0.05
4/29/2019 0.00
4/30/2019 0.00
5/1/2019 0.00
5/2/2019 0.00
5/3/2019 0.68
5/4/2019 0.00
5/5/2019 0.15
5/6/2019 0.87
5/7/2019 0.00
5/8/2019 0.00
5/9/2019 0.00
5/10/2019 0.00
5/11/2019 0.42
5/12/2019 0.15
5/13/2019 0.75
5/14/2019 0.28
5/15/2019 0.00
5/16/2019 0.00
5/17/2019 0.00
5/18/2019 0.00
5/19/2019 0.00
5/20/2019 0.00
5/21/2019 T
5/22/2019 0.00
5/23/2019 0.00
5/24/2019 0.45
5/25/2019 0.00
5/26/2019 0.14
5/27/2019 0.00
5/28/2019 0.00
5/29/2019 T
5/30/2019 0.00
5/31/2019 0.28
6/1/2019 0.00
6/2/2019 0.00
6/3/2019 0.48
6/4/2019 0.00
6/5/2019 0.00
6/6/2019 0.07
6/7/2019 0.00
6/8/2019 0.00
6/9/2019 0.01
6/10/2019 0.97
6/11/2019 0.38
6/12/2019 0.00
6/13/2019 2.08
6/14/2019 0.35
6/15/2019 0.00
6/16/2019 0.00
6/17/2019 0.00
6/18/2019 0.66
6/19/2019 0.09
6/20/2019 0.01
6/21/2019 0.23
6/22/2019 0.00
6/23/2019 0.00
6/24/2019 0.00
6/25/2019 0.09
6/26/2019 0.00
6/27/2019 0.00
6/28/2019 0.00
6/29/2019 0.00
6/30/2019 0.03
Day of YearDaily PrcpMultiday Prcp
7/1/2019 0.00
7/2/2019 0.00
7/3/2019 0.00
7/4/2019 0.00
7/5/2019 0.27
7/6/2019 0.00
7/7/2019 1.51
7/8/2019 1.54
7/9/2019 2.94
7/10/2019 0.00
7/11/2019 0.00
7/12/2019 0.82
7/13/2019 0.00
7/14/2019 0.00
7/15/2019 0.00
7/16/2019 0.00
7/17/2019 0.00
7/18/2019 0.06
7/19/2019 0.00
7/20/2019 0.00
7/21/2019 0.00
7/22/2019 0.00
7/23/2019 0.06
7/24/2019 0.36
7/25/2019 0.00
7/26/2019 0.00
7/27/2019 0.00
7/28/2019 0.00
7/29/2019 0.00
7/30/2019 0.00
7/31/2019 0.00
8/1/2019 T
8/2/2019 2.64
8/3/2019 0.31
8/4/2019 0.00
8/5/2019 0.13
8/6/2019 0.10
8/7/2019 0.00
8/8/2019 T
8/9/2019 0.00
8/10/2019 0.00
8/11/2019 0.00
8/12/2019 0.00
8/13/2019 0.00
8/14/2019 0.03
8/15/2019 0.00
8/16/2019 0.00
8/17/2019 0.00
8/18/2019 0.00
8/19/2019 0.00
8/20/2019 0.00
8/21/2019 1.02
8/22/2019 T
8/23/2019 0.00
8/24/2019 0.69
8/25/2019 0.00
8/26/2019 0.00
8/27/2019 0.00
8/28/2019 0.00
8/29/2019 0.00
8/30/2019 0.00
8/31/2019 0.00
9/1/2019 0.00
9/2/2019 0.00
9/3/2019 0.29
9/4/2019 0.00
9/5/2019 0.00
9/6/2019 0.02
9/7/2019 0.02
9/8/2019 0.00
9/9/2019 0.00
9/10/2019 0.00
9/11/2019 0.00
9/12/2019 T
9/13/2019 0.10
9/14/2019 0.00
9/15/2019 0.00
9/16/2019 0.00
9/17/2019 0.00
9/18/2019 0.05
9/19/2019 0.00
9/20/2019 0.00
9/21/2019 0.00
9/22/2019 0.00
9/23/2019 0.00
9/24/2019 0.00
9/25/2019 0.00
9/26/2019 0.00
9/27/2019 0.00
9/28/2019 0.00
9/29/2019 0.07
9/30/2019 0.00



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
3/27/2019 7:00 AM 0.00 M M M M
3/28/2019 7:00 AM 0.00 M M M M
3/29/2019 7:00 AM 0.00 M M M M
3/31/2019 7:00 AM 0.00 0.0 M M M
4/1/2019 7:00 AM 0.01 M M M M Barely wet the ground
4/2/2019 7:00 AM 0.00 M M M M
4/3/2019 7:00 AM 0.03 M M M M
4/4/2019 7:00 AM 0.00 0.0 M M M
4/5/2019 6:30 AM T M M M M
4/6/2019 7:00 AM 0.19 M M M M
4/7/2019 7:00 AM 0.00 0.0 M M M
4/8/2019 6:00 AM 0.00 M M M M
4/9/2019 6:30 AM 0.11 M M M M Some gusty winds and thunder
4/10/2019 6:00 AM 0.00 M M M M
4/11/2019 6:00 AM 0.00 M M M M
4/12/2019 7:00 AM 0.00 M M M M
4/13/2019 8:30 AM 0.57 M M M M
4/14/2019 7:00 AM 0.00 M M M M
4/15/2019 6:00 AM 0.33 M M M M
4/16/2019 7:00 AM 0.00 M M M M
4/17/2019 7:00 AM 0.00 M M M M
4/18/2019 7:00 AM 0.00 M M M M
4/19/2019 7:00 AM 0.00 M M M M
4/20/2019 7:00 AM 0.28 M M M M
4/21/2019 7:00 AM 0.00 M M M M
4/22/2019 7:00 AM 0.00 M M M M
4/23/2019 7:00 AM 0.00 M M M M
4/24/2019 7:00 AM 0.00 M M M M
4/25/2019 7:00 AM 0.00 M M M M
4/26/2019 6:30 AM 0.03 M M M M
4/27/2019 7:00 AM 0.21 M M M M
4/28/2019 7:00 AM 0.05 M M M M
4/29/2019 7:00 AM 0.00 M M M M
4/30/2019 7:00 AM 0.00 M M M M
5/1/2019 7:00 AM 0.00 M M M M
5/2/2019 7:00 AM 0.00 M M M M
5/3/2019 7:00 AM 0.68 M M M M
5/4/2019 7:00 AM 0.00 M M M M
5/5/2019 8:00 AM 0.15 M M M M
5/6/2019 6:00 AM 0.87 M M M M
5/7/2019 7:00 AM 0.00 M M M M
5/8/2019 7:00 AM 0.00 M M M M
5/9/2019 7:00 AM 0.00 M M M M
5/10/2019 7:00 AM 0.00 M M M M
5/11/2019 7:00 AM 0.42 M M M M
5/12/2019 7:00 AM 0.15 M M M M
5/13/2019 7:00 AM 0.75 M M M M
5/14/2019 7:00 AM 0.28 M M M M
5/15/2019 7:00 AM 0.00 M M M M
5/16/2019 7:00 AM 0.00 M M M M
5/17/2019 7:00 AM 0.00 M M M M
5/18/2019 7:00 AM 0.00 M M M M
5/19/2019 7:00 AM 0.00 M M M M
5/20/2019 7:00 AM 0.00 M M M M
5/21/2019 7:00 AM T M M M M
5/22/2019 7:00 AM 0.00 M M M M
5/23/2019 7:00 AM 0.00 M M M M
5/24/2019 7:00 AM 0.45 M M M M All rain came in 15 minutes with heavy wind and lightning
5/25/2019 7:00 AM 0.00 M M M M
5/26/2019 7:00 AM 0.14 M M M M Rained for ten minutes in thunderstorm at 1:20am. No wind, lots of lightning.
5/27/2019 7:00 AM 0.00 M M M M
5/28/2019 7:00 AM 0.00 M M M M
5/29/2019 7:00 AM T M M M M
5/30/2019 7:00 AM 0.00 M M M M
5/31/2019 7:00 AM 0.28 M M M M
6/1/2019 7:00 AM 0.00 M M M M
6/2/2019 7:00 AM 0.00 M M M M
6/3/2019 6:00 AM 0.48 M M M M
6/4/2019 7:00 AM 0.00 M M M M
6/5/2019 7:00 AM 0.00 M M M M
6/6/2019 6:20 AM 0.07 M M M M
6/7/2019 7:00 AM 0.00 M M M M
6/8/2019 7:00 AM 0.00 0.0 M M M
6/9/2019 7:00 AM 0.01 M M M M
6/10/2019 7:00 AM 0.97 M M M M
6/11/2019 7:00 AM 0.38 M M M M
6/12/2019 7:00 AM 0.00 M M M M
6/13/2019 7:00 AM 2.08 M M M M
6/14/2019 7:00 AM 0.35 M M M M
6/15/2019 7:00 AM 0.00 M M M M
6/16/2019 7:00 AM 0.00 M M M M
6/17/2019 7:00 AM 0.00 M M M M
6/18/2019 7:00 AM 0.66 M M M M
6/19/2019 7:00 AM 0.09 M M M M
6/20/2019 7:00 AM 0.01 M M M M
6/21/2019 7:00 AM 0.23 M M M M
6/22/2019 7:00 AM 0.00 M M M M
6/23/2019 7:00 AM 0.00 M M M M
6/24/2019 7:00 AM 0.00 M M M M
6/25/2019 7:00 AM 0.09 M M M M
6/26/2019 7:00 AM 0.00 M M M M
6/27/2019 7:00 AM 0.00 M M M M
6/28/2019 7:00 AM 0.00 M M M M
6/29/2019 7:00 AM 0.00 M M M M
6/30/2019 7:00 AM 0.03 M M M M
7/1/2019 7:00 AM 0.00 M M M M
7/2/2019 7:00 AM 0.00 M M M M
7/3/2019 7:00 AM 0.00 M M M M
7/4/2019 7:00 AM 0.00 0.0 M M M
7/5/2019 7:00 AM 0.27 M M M M
7/6/2019 7:00 AM 0.00 M M M M
7/7/2019 7:00 AM 1.51 M M M M Flash flooding, torrential rain
7/8/2019 7:00 AM 1.54 M M M M More torrential rain
7/9/2019 7:00 AM 2.94 M M M M We received 2.4” in 40 minutes. Fortunately the storm moved on, because had it lingered, we would have had more damage.
7/10/2019 7:00 AM 0.00 M M M M
7/11/2019 7:00 AM 0.00 M M M M
7/12/2019 7:00 AM 0.82 M M M M
7/13/2019 7:00 AM 0.00 M M M M
7/14/2019 7:00 AM 0.00 M M M M
7/15/2019 7:00 AM 0.00 M M M M
7/16/2019 7:00 AM 0.00 M M M M
7/17/2019 7:00 AM 0.00 M M M M
7/18/2019 7:00 AM 0.06 M M M M
7/19/2019 7:00 AM 0.00 M M M M
7/20/2019 7:00 AM 0.00 M M M M
7/21/2019 7:00 AM 0.00 M M M M
7/22/2019 7:00 AM 0.00 M M M M
7/23/2019 7:00 AM 0.06 M M M M
7/24/2019 7:00 AM 0.36 M M M M
7/25/2019 7:00 AM 0.00 M M M M
7/26/2019 7:00 AM 0.00 M M M M
7/27/2019 7:00 AM 0.00 M M M M
7/28/2019 7:00 AM 0.00 M M M M
7/29/2019 7:00 AM 0.00 M M M M
7/30/2019 7:00 AM 0.00 M M M M
7/31/2019 7:00 AM 0.00 0.0 M M M
8/1/2019 7:00 AM T M M M M
8/2/2019 6:00 AM 2.64 M M M M Two storms. First on 8/1 between 6:30pm and 7pm had 1.62 heavy rain and hail. Hail was pea gravel size. Heavy winds blew down 85’ eastern white pine; snapped off at ground level. Other storm at 4:30am 1” in 1.5 hours. Still raining.
8/3/2019 7:00 AM 0.31 M M M M
8/4/2019 7:00 AM 0.00 M M M M
8/5/2019 7:00 AM 0.13 M M M M
8/6/2019 7:00 AM 0.10 M M M M
8/7/2019 7:00 AM 0.00 M M M M
8/8/2019 7:00 AM T M M M M
8/9/2019 7:00 AM 0.00 M M M M
8/10/2019 7:00 AM 0.00 M M M M
8/11/2019 7:00 AM 0.00 M M M M
8/12/2019 7:00 AM 0.00 M M M M
8/13/2019 7:00 AM 0.00 M M M M
8/14/2019 7:00 AM 0.03 M M M M
8/15/2019 7:00 AM 0.00 M M M M
8/16/2019 7:00 AM 0.00 M M M M
8/17/2019 7:00 AM 0.00 M M M M
8/18/2019 7:00 AM 0.00 M M M M
8/19/2019 7:00 AM 0.00 M M M M
8/20/2019 7:00 AM 0.00 M M M M
8/21/2019 7:00 AM 1.02 M M M M
8/22/2019 7:00 AM T M M M M
8/23/2019 7:00 AM 0.00 M M M M
8/24/2019 7:00 AM 0.69 M M M M
8/25/2019 7:00 AM 0.00 M M M M
8/26/2019 7:00 AM 0.00 M M M M
8/27/2019 7:00 AM 0.00 M M M M
8/28/2019 7:00 AM 0.00 M M M M
8/29/2019 7:00 AM 0.00 M M M M
8/30/2019 7:00 AM 0.00 M M M M
8/31/2019 7:00 AM 0.00 M M M M
9/1/2019 7:00 AM 0.00 M M M M
9/2/2019 7:00 AM 0.00 M M M M
9/3/2019 7:00 AM 0.29 M M M M
9/4/2019 7:00 AM 0.00 M M M M
9/5/2019 7:00 AM 0.00 M M M M
9/6/2019 7:00 AM 0.02 M M M M
9/7/2019 7:00 AM 0.02 M M M M
9/8/2019 7:00 AM 0.00 M M M M
9/9/2019 7:00 AM 0.00 M M M M
9/10/2019 7:00 AM 0.00 M M M M
9/11/2019 7:00 AM 0.00 M M M M
9/12/2019 7:00 AM T M M M M
9/13/2019 7:00 AM 0.10 M M M M
9/14/2019 7:00 AM 0.00 M M M M
9/15/2019 7:00 AM 0.00 M M M M
9/16/2019 7:00 AM 0.00 M M M M
9/17/2019 7:00 AM 0.00 M M M M
9/18/2019 7:00 AM 0.05 M M M M
9/19/2019 7:00 AM 0.00 M M M M
9/20/2019 7:00 AM 0.00 M M M M
9/21/2019 7:00 AM 0.00 M M M M
9/22/2019 7:00 AM 0.00 M M M M
9/23/2019 7:00 AM 0.00 M M M M
9/24/2019 7:00 AM 0.00 M M M M
9/25/2019 7:00 AM 0.00 M M M M
9/26/2019 7:00 AM 0.00 M M M M
9/27/2019 7:00 AM 0.00 M M M M
9/28/2019 7:00 AM 0.00 M M M M
9/29/2019 7:00 AM 0.07 M M M M
9/30/2019 7:00 AM 0.00 M 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
8/1/2019 6:45 PM 1/2" Grape NA 1/4" Pea Size Mixed|Clear Ice 10 2min shredded leaves Continuous True After rain Same time as smaller hail 30-40