Station Overview Station Location
Station Number MD-SM-8 Latitude 38.219722
Station Name Park Hall 0.2 SW Longitude -76.441667
County St. Mary's Elevation (ft) 75



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 17 3.59 3.71 12 3.71 12 0.00 0 0 12 0 0.0 0 0
Nov 17 3.27 2.50 7 2.50 7 0.00 0 0 7 0 0.0 0 0
Dec 17 3.40 0.75 7 0.75 7 0.00 0 0 6 1 5.0 2 1
Jan 18 3.19 3.42 11 3.42 11 0.00 0 0 11 0 4.1 2 1
Feb 18 2.92 3.51 17 3.51 17 0.00 0 0 16 1 0.0 0 0
March 18 4.22 2.81 10 2.81 10 0.00 0 0 10 0 3.0 1 1
April 18 3.44 3.58 11 3.58 11 0.00 0 0 11 0 0.0 0 0
May 18 4.02 9.87 13 9.87 13 0.00 0 0 13 0 0.0 0 0
June 18 3.93 3.87 15 3.87 15 0.00 0 0 15 0 0.0 0 0
July 18 4.13 7.06 12 7.06 12 0.00 0 0 12 0 0.0 0 0
Aug 18 3.94 3.05 11 3.05 11 0.00 0 0 11 0 0.0 0 0
Sept 18 3.84 7.39 16 7.39 16 0.00 0 0 16 0 0.0 0 0
Water Year Totals: 43.89" 51.52" 142 days 51.52" 142 0.00" 0 days 0 140 days 2 days 12.1" 5 days 3 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
10/1/2017
10/2/2017
10/3/2017
10/4/2017
10/5/2017
10/6/2017
10/7/2017
10/8/2017 0.02
10/9/2017 0.05
10/10/2017
10/11/2017 0.47
10/12/2017 0.48
10/13/2017 0.04
10/14/2017 0.01
10/15/2017 0.02
10/16/2017 0.09
10/17/2017 0.08
10/18/2017
10/19/2017
10/20/2017
10/21/2017
10/22/2017
10/23/2017
10/24/2017 0.66
10/25/2017
10/26/2017
10/27/2017
10/28/2017
10/29/2017 0.81
10/30/2017 0.98
10/31/2017
11/1/2017
11/2/2017
11/3/2017
11/4/2017
11/5/2017 0.21
11/6/2017
11/7/2017 0.45
11/8/2017 0.69
11/9/2017 0.03
11/10/2017
11/11/2017
11/12/2017
11/13/2017 0.43
11/14/2017
11/15/2017
11/16/2017
11/17/2017
11/18/2017
11/19/2017 0.04
11/20/2017
11/21/2017
11/22/2017 0.65
11/23/2017
11/24/2017
11/25/2017
11/26/2017
11/27/2017
11/28/2017
11/29/2017
11/30/2017
12/1/2017
12/2/2017
12/3/2017
12/4/2017
12/5/2017 0.01
12/6/2017 0.08
12/7/2017
12/8/2017
12/9/2017 0.41
12/10/2017 0.20
12/11/2017
12/12/2017
12/13/2017
12/14/2017
12/15/2017
12/16/2017 T
12/17/2017
12/18/2017
12/19/2017
12/20/2017
12/21/2017
12/22/2017
12/23/2017
12/24/2017 0.03
12/25/2017 0.02
12/26/2017
12/27/2017
12/28/2017
12/29/2017
12/30/2017
12/31/2017
Day of YearDaily PrcpMultiday Prcp
1/1/2018
1/2/2018
1/3/2018
1/4/2018 0.36
1/5/2018 0.01
1/6/2018
1/7/2018
1/8/2018
1/9/2018 0.22
1/10/2018
1/11/2018
1/12/2018 0.02
1/13/2018 1.05
1/14/2018
1/15/2018
1/16/2018
1/17/2018 0.01
1/18/2018
1/19/2018
1/20/2018
1/21/2018
1/22/2018
1/23/2018 0.20
1/24/2018 0.06
1/25/2018
1/26/2018
1/27/2018
1/28/2018 0.22
1/29/2018 1.21
1/30/2018 0.06
1/31/2018
2/1/2018
2/2/2018 0.12
2/3/2018
2/4/2018
2/5/2018 0.42
2/6/2018
2/7/2018 0.02
2/8/2018 0.26
2/9/2018
2/10/2018
2/11/2018 0.62
2/12/2018 1.10
2/13/2018 0.07
2/14/2018
2/15/2018 0.02
2/16/2018 0.01
2/17/2018 0.04
2/18/2018 0.66
2/19/2018
2/20/2018 0.02
2/21/2018 T
2/22/2018
2/23/2018 0.06
2/24/2018 0.02
2/25/2018 0.06
2/26/2018 0.01
2/27/2018
2/28/2018
3/1/2018
3/2/2018 0.11
3/3/2018
3/4/2018
3/5/2018
3/6/2018
3/7/2018 0.75
3/8/2018 0.01
3/9/2018
3/10/2018
3/11/2018
3/12/2018
3/13/2018 0.27
3/14/2018
3/15/2018
3/16/2018
3/17/2018
3/18/2018
3/19/2018
3/20/2018 0.39
3/21/2018 0.73
3/22/2018 0.44
3/23/2018
3/24/2018
3/25/2018
3/26/2018 0.07
3/27/2018
3/28/2018 0.02
3/29/2018 0.02
3/30/2018
3/31/2018
Day of YearDaily PrcpMultiday Prcp
4/1/2018
4/2/2018 0.01
4/3/2018
4/4/2018
4/5/2018
4/6/2018
4/7/2018 0.27
4/8/2018 0.02
4/9/2018
4/10/2018
4/11/2018
4/12/2018
4/13/2018
4/14/2018
4/15/2018
4/16/2018 1.45
4/17/2018 0.11
4/18/2018
4/19/2018
4/20/2018 0.08
4/21/2018
4/22/2018
4/23/2018
4/24/2018
4/25/2018 0.88
4/26/2018 0.22
4/27/2018 0.44
4/28/2018 0.06
4/29/2018 0.04
4/30/2018
5/1/2018
5/2/2018
5/3/2018
5/4/2018
5/5/2018
5/6/2018 0.03
5/7/2018
5/8/2018
5/9/2018
5/10/2018
5/11/2018 0.03
5/12/2018
5/13/2018 0.24
5/14/2018 0.17
5/15/2018 0.90
5/16/2018
5/17/2018 0.28
5/18/2018 3.00
5/19/2018 2.36
5/20/2018 0.61
5/21/2018
5/22/2018
5/23/2018 0.78
5/24/2018
5/25/2018
5/26/2018
5/27/2018 0.04
5/28/2018 1.42
5/29/2018 0.01
5/30/2018
5/31/2018
6/1/2018 1.01
6/2/2018 0.29
6/3/2018 0.07
6/4/2018 0.62
6/5/2018
6/6/2018 0.14
6/7/2018
6/8/2018
6/9/2018 0.01
6/10/2018 0.08
6/11/2018 0.18
6/12/2018 0.02
6/13/2018 0.01
6/14/2018
6/15/2018
6/16/2018
6/17/2018
6/18/2018
6/19/2018
6/20/2018 0.69
6/21/2018 0.02
6/22/2018 0.06
6/23/2018 0.21
6/24/2018
6/25/2018 0.46
6/26/2018
6/27/2018
6/28/2018
6/29/2018
6/30/2018
Day of YearDaily PrcpMultiday Prcp
7/1/2018
7/2/2018
7/3/2018
7/4/2018
7/5/2018 0.04
7/6/2018 0.07
7/7/2018 0.49
7/8/2018
7/9/2018
7/10/2018
7/11/2018
7/12/2018
7/13/2018
7/14/2018
7/15/2018
7/16/2018
7/17/2018
7/18/2018 0.19
7/19/2018
7/20/2018
7/21/2018 0.13
7/22/2018 3.75
7/23/2018
7/24/2018 0.81
7/25/2018 0.34
7/26/2018 0.08
7/27/2018
7/28/2018 0.10
7/29/2018
7/30/2018 0.91
7/31/2018 0.15
8/1/2018 0.15
8/2/2018
8/3/2018
8/4/2018 0.02
8/5/2018
8/6/2018
8/7/2018 0.13
8/8/2018
8/9/2018 0.11
8/10/2018
8/11/2018
8/12/2018
8/13/2018 0.75
8/14/2018 0.08
8/15/2018 0.04
8/16/2018
8/17/2018
8/18/2018
8/19/2018 0.01
8/20/2018
8/21/2018 0.50
8/22/2018 1.15
8/23/2018
8/24/2018
8/25/2018
8/26/2018
8/27/2018
8/28/2018
8/29/2018
8/30/2018
8/31/2018 0.11
9/1/2018 0.08
9/2/2018
9/3/2018
9/4/2018
9/5/2018
9/6/2018
9/7/2018
9/8/2018 0.25
9/9/2018 0.94
9/10/2018 3.36
9/11/2018 0.08
9/12/2018
9/13/2018 0.02
9/14/2018 0.27
9/15/2018 0.02
9/16/2018
9/17/2018
9/18/2018 0.09
9/19/2018 0.33
9/20/2018
9/21/2018
9/22/2018 0.02
9/23/2018 0.44
9/24/2018 1.22
9/25/2018 0.11
9/26/2018
9/27/2018 0.04
9/28/2018 0.12
9/29/2018
9/30/2018



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
10/8/2017 8:30 AM 0.02 M M M M
10/9/2017 8:00 AM 0.05 M M M M -RA at Obs. Time.
10/11/2017 7:50 AM 0.47 M M M M -RA at Obs. Time.
10/12/2017 7:30 AM 0.48 M M M M
10/13/2017 9:30 AM 0.04 M M M M
10/14/2017 9:20 AM 0.01 M M M M
10/15/2017 9:00 AM 0.02 M M M M
10/16/2017 8:30 AM 0.09 M M M M -RA at Obs. and report times.
10/17/2017 7:00 AM 0.08 M M M M
10/24/2017 7:30 AM 0.66 M M M M RA between 0330 and approx. 0500; periods of heavy downpours.
10/29/2017 9:15 AM 0.81 M M M M RA after midnight, with periods of +RA. -RA at obs. time.
10/30/2017 8:00 AM 0.98 M M M M
11/5/2017 7:30 AM 0.21 M M M M
11/7/2017 8:15 AM 0.45 M M M M TS during evening. Event total exceeded entire month of Nov. 2016 [0.44"].
11/8/2017 7:45 AM 0.69 M M M M -RA at Obs. Time.
11/9/2017 8:00 AM 0.03 M M M M
11/13/2017 8:45 AM 0.43 M M M M
11/19/2017 9:00 AM 0.04 M M M M Windy.
11/22/2017 9:00 AM 0.65 M M M M
12/5/2017 8:30 AM 0.01 M M M M
12/6/2017 7:30 AM 0.08 M M M M
12/9/2017 9:45 AM 0.41 4.0 0.41 4.0 0.41 -SN continuing.
12/10/2017 10:00 AM 0.20 1.0 0.20 M M
12/16/2017 8:00 AM T T M M M
12/24/2017 7:30 AM 0.03 M M M M
12/25/2017 8:00 AM 0.02 M M M M Drizzle and -RA in late evening, before midnight.
1/4/2018 10:00 AM 0.36 4.0 0.36 M M Light blowing snow at report time.
1/5/2018 11:30 AM 0.01 M M 2.0 M Av. snow cover is estimated to be 2" in view of lots of blowing and drifting. Little if any melting in view of max temps. well below 32F.
1/9/2018 9:00 AM 0.22 M M M M
1/12/2018 8:00 AM 0.02 M M M M -RA continuing at Obs. Time. Min temp. overnight 50°F nigher than about a week ago.
1/13/2018 8:00 AM 1.05 M M M M Periods of RA, some with heavy downpours, during most of the day and evening. Light RA with some freezing precipitation at Ohs. Time.
1/17/2018 8:00 AM 0.01 0.1 0.01 M M -SN at Obs. and Report Times
1/23/2018 9:05 AM 0.20 M M M M -RA continuing at Obs. Time
1/24/2018 7:00 AM 0.06 M M M M
1/28/2018 9:10 AM 0.22 M M M M RA began after midnight; continuing at Obs. Time.
1/29/2018 8:15 AM 1.21 M M M M Total of 1.43" RA since precipitation started yesterday [Sunday].
1/30/2018 8:50 AM 0.06 M M M M
2/2/2018 8:00 AM 0.12 M M M M
2/5/2018 7:30 AM 0.42 M M M M
2/7/2018 8:00 AM 0.02 M M M M
2/8/2018 7:15 AM 0.26 M M M M
2/11/2018 8:15 AM 0.62 M M M M
2/12/2018 8:15 AM 1.10 M M M M Periods of +RA throughout, especially between 1345 and 1415.
2/13/2018 8:00 AM 0.07 M M M M
2/15/2018 9:30 AM 0.02 M M M M
2/16/2018 8:30 AM 0.01 M M M M
2/17/2018 7:00 AM 0.04 M M M M
2/18/2018 7:00 AM 0.66 M M M M
2/20/2018 8:00 AM 0.02 M M M M Drizzle/mist and fog in PM of 2/19.
2/21/2018 7:00 AM T M M M M
2/23/2018 7:20 AM 0.06 M M M M Drizzle/mist/light RA most of day.
2/24/2018 8:00 AM 0.02 M M M M Fog.
2/25/2018 8:10 AM 0.06 M M M M Periods of fairly dense fog.
2/26/2018 7:00 AM 0.01 M M M M
3/2/2018 7:30 AM 0.11 M M M M VERY windy with some light precipitation.
3/7/2018 7:40 AM 0.75 M M M M -RA at Obs. Time.
3/8/2018 7:00 AM 0.01 M M M M
3/13/2018 7:00 AM 0.27 M M M M Periods of RA and SN mix during the afternoon. No accumulation of SN.
3/20/2018 8:00 AM 0.39 M M M M RA continuing at obs. and report times.
3/21/2018 8:00 AM 0.73 M M M M Sleet at Obs. Time, has changed to mostly SN at report time [1030].
3/22/2018 9:45 AM 0.44 3.0 0.44 3.0 0.44 SN measured 3.5" at 1630 on 3/21. SN and sleet most of day, tapered off in evening.
3/26/2018 7:00 AM 0.07 M M M M RA Shower in mid-afternoon; moving [per radar] NE to SW.
3/28/2018 7:30 AM 0.02 M M M M
3/29/2018 7:00 AM 0.02 M M M M
4/2/2018 8:00 AM 0.01 M M M M Sleet
4/7/2018 7:45 AM 0.27 M M M M -RA continuing at report time [0830]
4/8/2018 7:00 AM 0.02 M M M M Very light SN about 1800.
4/16/2018 7:20 AM 1.45 M M M M
4/17/2018 7:00 AM 0.11 M M M M
4/20/2018 7:00 AM 0.08 M M M M -RA showers throughout most of the day.
4/25/2018 7:20 AM 0.88 M M M M
4/26/2018 7:00 AM 0.22 M M M M Thunder heard in evening.
4/27/2018 9:00 AM 0.44 M M M M RA after midnight, included short periods of heavy downpours.
4/28/2018 7:00 AM 0.06 M M M M
4/29/2018 7:00 AM 0.04 M M M M
5/6/2018 9:20 AM 0.03 M M M M
5/11/2018 7:00 AM 0.03 M M M M A couple rumbles of thunder heard around 1730-1800.
5/13/2018 8:00 AM 0.24 M M M M TS approx. 2300.
5/14/2018 9:00 AM 0.17 M M M M Two periods of RA; one with distant thunder.
5/15/2018 7:00 AM 0.90 M M M M TSs, wind, heavy downpours, from about 2030.
5/17/2018 8:00 AM 0.28 M M M M
5/18/2018 8:00 AM 3.00 M M M M Periods of +RA all night; continuing at Ohs. Time.
5/19/2018 8:20 AM 2.36 M M M M Periods of +RA with mostly steady RA all day. Total of 6.95" RA over last 7 days, up to 0820 this morning.
5/20/2018 8:00 AM 0.61 M M M M Periods of +RA during the day.
5/23/2018 8:00 AM 0.78 M M M M TSs before midnight. May precipitation total stands at 8.40, more than an inch over May of 2017.
5/27/2018 8:15 AM 0.04 M M M M
5/28/2018 7:40 AM 1.42 M M M M Periods of +RA beginning in late afternoon.
5/29/2018 8:00 AM 0.01 M M M M
6/1/2018 8:20 AM 1.01 M M M M TS before midnight; periods of heavy RA. Total precip. for May: 10.82"
6/2/2018 8:00 AM 0.29 M M M M
6/3/2018 7:55 AM 0.07 M M M M RA at Obs. Time and continuing at report time. Distant thunder earlier.
6/4/2018 8:00 AM 0.62 M M M M Light to moderate RA nearly all day.
6/6/2018 7:00 AM 0.14 M M M M
6/9/2018 8:30 AM 0.01 M M M M
6/10/2018 8:00 AM 0.08 M M M M Several TSs within hearing distance over the afternoon and evening. None right at this location.
6/11/2018 7:45 AM 0.18 M M M M Mist/drizzle at Obs. Time.
6/12/2018 7:00 AM 0.02 M M M M
6/13/2018 7:30 AM 0.01 M M M M
6/20/2018 7:00 AM 0.69 M M M M TS with periods of +RA; approx. 1530-1645.
6/21/2018 7:00 AM 0.02 M M M M Distant thunder in evening.
6/22/2018 8:00 AM 0.06 M M M M
6/23/2018 7:30 AM 0.21 M M M M
6/25/2018 7:00 AM 0.46 M M M M Moderate TS and RA from approx. 1500-1630.
7/5/2018 7:30 AM 0.04 M M M M Short shower about 0630.
7/6/2018 7:00 AM 0.07 M M M M
7/7/2018 8:00 AM 0.49 M M M M
7/18/2018 7:00 AM 0.19 M M M M
7/21/2018 8:35 AM 0.13 M M M M RA began after midnight; continuing at report time. Light to moderate.
7/22/2018 7:00 AM 3.75 M M M M 3.88" RA event total; periods of heavy downpours throughout.
7/24/2018 7:00 AM 0.81 M M M M TS after midnight; some heavy downpours.
7/25/2018 7:00 AM 0.34 M M M M
7/26/2018 7:00 AM 0.08 M M M M
7/28/2018 8:00 AM 0.10 M M M M
7/30/2018 8:45 AM 0.91 M M M M RA and TS began approx. 0600. -RA continuing at report time.
7/31/2018 7:30 AM 0.15 M M M M
8/1/2018 7:30 AM 0.15 M M M M
8/4/2018 8:00 AM 0.02 M M M M
8/7/2018 9:00 AM 0.13 M M M M
8/9/2018 8:00 AM 0.11 M M M M
8/13/2018 8:00 AM 0.75 M M M M TS with heavy RA in early evening.
8/14/2018 8:00 AM 0.08 M M M M RA/TS about 2130.
8/15/2018 7:00 AM 0.04 M M M M Small RA Shower about 1900.
8/19/2018 8:00 AM 0.01 M M M M
8/21/2018 9:00 AM 0.50 M M M M TS with some +RA approx. 1600-1700.
8/22/2018 8:00 AM 1.15 M M M M SHs and TSs with heavy downpours throughout the day.
8/31/2018 9:00 AM 0.11 M M M M TS about midnight.
9/1/2018 8:30 AM 0.08 M M M M TS developed nearby [So. MD] about 2000.
9/8/2018 9:00 AM 0.25 M M M M SH with period of +RA between 1300 and 1400.
9/9/2018 9:45 AM 0.94 M M M M Moderate RA with periods of +RA continueing.
9/10/2018 8:00 AM 3.36 M M M M
9/11/2018 8:30 AM 0.08 M M M M
9/13/2018 8:40 AM 0.02 M M M M
9/14/2018 8:45 AM 0.27 M M M M
9/15/2018 9:00 AM 0.02 M M M M
9/18/2018 7:00 AM 0.09 M M M M
9/19/2018 9:00 AM 0.33 M M M M
9/22/2018 7:00 AM 0.02 M M M M
9/23/2018 8:00 AM 0.44 M M M M RA started around midnight; continuing at report time [0935].
9/24/2018 9:05 AM 1.22 M M M M
9/25/2018 9:00 AM 0.11 M M M M
9/27/2018 7:30 AM 0.04 M M M M
9/28/2018 8:55 AM 0.12 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