Station Overview Station Location
Station Number VA-FX-51 Latitude 38.903
Station Name Vienna 1.3 W Longitude -77.2836
County Fairfax Elevation (ft) 371



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 3.55 3.43 31 3.43 31 0.00 0 0 12 1 0.0 0 0
Nov 18 3.35 8.27 30 8.27 30 0.00 0 0 13 1 1.1 1 2
Dec 18 3.17 6.98 31 6.98 31 0.00 0 0 11 1 0.0 0 0
Jan 19 2.94 4.85 31 4.85 31 0.00 0 0 13 1 14.7 4 12
Feb 19 2.74 3.84 28 3.84 28 0.00 0 0 13 1 6.4 5 5
March 19 3.67 5.18 31 5.18 31 0.00 0 0 10 2 1.0 3 1
April 19 3.34 2.76 30 2.76 30 0.00 0 0 15 0 0.0 0 0
May 19 4.24 5.30 31 2.75 24 2.55 7 1 11 0 0.0 0 0
June 19 3.98 4.22 30 3.84 27 0.38 3 1 14 0 0.0 0 0
July 19 4.03 6.80 31 6.80 31 0.00 0 0 11 1 0.0 0 0
Aug 19 3.36 4.81 31 3.19 27 1.62 4 1 9 2 0.0 0 0
Sept 19 4.00 0.41 30 0.41 30 0.00 0 0 4 3 0.0 0 0
Water Year Totals: 42.37" 56.85" 365 days 52.30" 351 4.55" 14 days 3 136 days 13 days 23.2" 13 days 20 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 0.00
10/2/2018 0.00
10/3/2018 0.00
10/4/2018 0.00
10/5/2018 0.00
10/6/2018 0.04
10/7/2018 0.00
10/8/2018 0.00
10/9/2018 0.00
10/10/2018 0.02
10/11/2018 0.35
10/12/2018 0.94
10/13/2018 0.08
10/14/2018 0.00
10/15/2018 0.27
10/16/2018 0.05
10/17/2018 0.00
10/18/2018 0.00
10/19/2018 0.00
10/20/2018 0.10
10/21/2018 0.02
10/22/2018 0.00
10/23/2018 0.00
10/24/2018 0.00
10/25/2018 0.00
10/26/2018 0.00
10/27/2018 1.20
10/28/2018 0.31
10/29/2018 0.05
10/30/2018 T
10/31/2018 0.00
11/1/2018 0.00
11/2/2018 0.00
11/3/2018 1.10
11/4/2018 0.02
11/5/2018 0.67
11/6/2018 0.73
11/7/2018 0.54
11/8/2018 0.00
11/9/2018 T
11/10/2018 0.57
11/11/2018 0.00
11/12/2018 0.00
11/13/2018 1.11
11/14/2018 0.02
11/15/2018 0.19
11/16/2018 1.35
11/17/2018 0.00
11/18/2018 0.00
11/19/2018 0.00
11/20/2018 0.00
11/21/2018 0.00
11/22/2018 0.00
11/23/2018 0.00
11/24/2018 0.00
11/25/2018 1.69
11/26/2018 0.02
11/27/2018 0.26
11/28/2018 0.00
11/29/2018 0.00
11/30/2018 0.00
12/1/2018 0.02
12/2/2018 0.34
12/3/2018 0.01
12/4/2018 0.00
12/5/2018 0.00
12/6/2018 T
12/7/2018 0.00
12/8/2018 0.00
12/9/2018 0.00
12/10/2018 0.00
12/11/2018 0.00
12/12/2018 0.00
12/13/2018 0.00
12/14/2018 0.00
12/15/2018 0.71
12/16/2018 3.35
12/17/2018 0.19
12/18/2018 0.00
12/19/2018 0.00
12/20/2018 0.00
12/21/2018 0.51
12/22/2018 0.75
12/23/2018 0.00
12/24/2018 0.04
12/25/2018 0.00
12/26/2018 0.00
12/27/2018 0.00
12/28/2018 0.72
12/29/2018 0.34
12/30/2018 0.00
12/31/2018 0.00
Day of YearDaily PrcpMultiday Prcp
1/1/2019 0.49
1/2/2019 0.00
1/3/2019 0.00
1/4/2019 0.00
1/5/2019 0.14
1/6/2019 0.02
1/7/2019 0.00
1/8/2019 0.07
1/9/2019 0.19
1/10/2019 0.01
1/11/2019 0.00
1/12/2019 0.00
1/13/2019 0.55
1/14/2019 0.59
1/15/2019 0.00
1/16/2019 0.00
1/17/2019 0.00
1/18/2019 0.16
1/19/2019 0.00
1/20/2019 1.13
1/21/2019 0.00
1/22/2019 0.00
1/23/2019 0.00
1/24/2019 0.41
1/25/2019 0.94
1/26/2019 0.00
1/27/2019 0.00
1/28/2019 0.00
1/29/2019 0.00
1/30/2019 0.15
1/31/2019 T
2/1/2019 0.01
2/2/2019 0.09
2/3/2019 0.00
2/4/2019 0.00
2/5/2019 0.00
2/6/2019 0.00
2/7/2019 0.08
2/8/2019 0.02
2/9/2019 T
2/10/2019 0.00
2/11/2019 0.34
2/12/2019 0.53
2/13/2019 0.53
2/14/2019 0.00
2/15/2019 0.00
2/16/2019 0.00
2/17/2019 0.00
2/18/2019 0.58
2/19/2019 0.00
2/20/2019 0.18
2/21/2019 0.71
2/22/2019 0.01
2/23/2019 0.00
2/24/2019 0.75
2/25/2019 0.01
2/26/2019 0.00
2/27/2019 0.00
2/28/2019 0.00
3/1/2019 0.20
3/2/2019 0.68
3/3/2019 0.00
3/4/2019 0.65
3/5/2019 0.00
3/6/2019 0.00
3/7/2019 0.00
3/8/2019 0.00
3/9/2019 0.19
3/10/2019 0.44
3/11/2019 0.01
3/12/2019 0.00
3/13/2019 0.00
3/14/2019 0.00
3/15/2019 0.00
3/16/2019 0.00
3/17/2019 0.00
3/18/2019 0.00
3/19/2019 T
3/20/2019 0.00
3/21/2019 0.44
3/22/2019 2.44
3/23/2019 0.12
3/24/2019 0.00
3/25/2019 0.00
3/26/2019 T
3/27/2019 0.00
3/28/2019 0.00
3/29/2019 0.00
3/30/2019 0.00
3/31/2019 0.01
Day of YearDaily PrcpMultiday Prcp
4/1/2019 0.02
4/2/2019 0.00
4/3/2019 0.01
4/4/2019 0.00
4/5/2019 0.15
4/6/2019 0.13
4/7/2019 0.00
4/8/2019 0.03
4/9/2019 0.01
4/10/2019 0.00
4/11/2019 0.00
4/12/2019 0.00
4/13/2019 0.61
4/14/2019 0.01
4/15/2019 0.13
4/16/2019 0.01
4/17/2019 0.00
4/18/2019 0.00
4/19/2019 0.00
4/20/2019 0.92
4/21/2019 0.01
4/22/2019 0.00
4/23/2019 0.00
4/24/2019 0.00
4/25/2019 0.00
4/26/2019 0.07
4/27/2019 0.52
4/28/2019 0.13
4/29/2019 0.00
4/30/2019 0.00
5/1/2019 0.00
5/2/2019 0.00
5/3/2019 **
5/4/2019 **
5/5/2019 **
5/6/2019 2.55
5/7/2019 0.00
5/8/2019 0.00
5/9/2019 0.00
5/10/2019 0.01
5/11/2019 0.48
5/12/2019 0.60
5/13/2019 0.61
5/14/2019 0.23
5/15/2019 0.00
5/16/2019 0.01
5/17/2019 0.02
5/18/2019 0.00
5/19/2019 0.00
5/20/2019 0.00
5/21/2019 0.00
5/22/2019 0.00
5/23/2019 0.00
5/24/2019 0.32
5/25/2019 0.00
5/26/2019 0.10
5/27/2019 0.01
5/28/2019 0.36
5/29/2019 **
5/30/2019 **
5/31/2019 **
6/1/2019 **
6/2/2019 **
6/3/2019 0.38
6/4/2019 0.00
6/5/2019 0.00
6/6/2019 0.11
6/7/2019 0.00
6/8/2019 0.00
6/9/2019 0.00
6/10/2019 0.38
6/11/2019 0.10
6/12/2019 0.00
6/13/2019 0.83
6/14/2019 0.07
6/15/2019 0.00
6/16/2019 0.00
6/17/2019 0.01
6/18/2019 0.39
6/19/2019 0.29
6/20/2019 0.03
6/21/2019 0.07
6/22/2019 0.00
6/23/2019 0.00
6/24/2019 0.00
6/25/2019 0.71
6/26/2019 0.00
6/27/2019 0.00
6/28/2019 0.42
6/29/2019 0.40
6/30/2019 0.03
Day of YearDaily PrcpMultiday Prcp
7/1/2019 0.00
7/2/2019 0.00
7/3/2019 0.64
7/4/2019 0.01
7/5/2019 0.34
7/6/2019 0.00
7/7/2019 0.25
7/8/2019 0.04
7/9/2019 3.74
7/10/2019 0.00
7/11/2019 0.00
7/12/2019 0.73
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 0.37
7/19/2019 0.00
7/20/2019 0.00
7/21/2019 0.00
7/22/2019 T
7/23/2019 0.38
7/24/2019 0.07
7/25/2019 0.23
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 0.02
8/2/2019 0.00
8/3/2019 0.00
8/4/2019 0.19
8/5/2019 0.00
8/6/2019 0.00
8/7/2019 0.02
8/8/2019 1.12
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 **
8/15/2019 **
8/16/2019 **
8/17/2019 1.62
8/18/2019 0.00
8/19/2019 0.16
8/20/2019 0.74
8/21/2019 0.36
8/22/2019 T
8/23/2019 T
8/24/2019 0.39
8/25/2019 0.00
8/26/2019 0.00
8/27/2019 0.00
8/28/2019 0.00
8/29/2019 0.19
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 0.00
9/7/2019 0.00
9/8/2019 0.00
9/9/2019 0.01
9/10/2019 0.00
9/11/2019 0.00
9/12/2019 0.08
9/13/2019 0.03
9/14/2019 T
9/15/2019 0.00
9/16/2019 0.00
9/17/2019 T
9/18/2019 0.00
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 T
9/25/2019 0.00
9/26/2019 0.00
9/27/2019 0.00
9/28/2019 0.00
9/29/2019 0.00
9/30/2019 0.00



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
10/1/2018 7:30 AM 0.00 0.0 M M M
10/2/2018 8:00 AM 0.00 0.0 M M M
10/3/2018 8:00 AM 0.00 M M M M
10/4/2018 8:00 AM 0.00 M M M M
10/5/2018 8:00 AM 0.00 M M M M
10/6/2018 8:00 AM 0.04 M M M M
10/7/2018 8:00 AM 0.00 0.0 M M M
10/8/2018 8:00 AM 0.00 0.0 M M M
10/9/2018 7:45 AM 0.00 0.0 M M M too-warm October day (low 80s)
10/10/2018 8:00 AM 0.02 M M M M
10/11/2018 8:00 AM 0.35 M M M M outer band from remnants of Michael; more to come
10/12/2018 8:00 AM 0.94 M M M M rest of TS Michael. Rainy 3pm till late night. Quite breezy this morning.
10/13/2018 8:00 AM 0.08 M M M M
10/14/2018 8:00 AM 0.00 M M M M
10/15/2018 8:30 AM 0.27 M M M M showers
10/16/2018 8:00 AM 0.05 M M M M
10/17/2018 8:00 AM 0.00 0.0 M M M
10/18/2018 8:00 AM 0.00 0.0 M M M
10/19/2018 8:00 AM 0.00 0.0 M M M
10/20/2018 8:00 AM 0.10 M M M M shower overnight
10/21/2018 8:00 AM 0.02 M M M M 10 PM shower, along with some wind gusts and a front
10/22/2018 8:00 AM 0.00 0.0 M M M
10/23/2018 8:00 AM 0.00 0.0 M M M
10/24/2018 8:00 AM 0.00 0.0 M M M
10/25/2018 8:00 AM 0.00 0.0 M M M
10/26/2018 8:00 AM 0.00 0.0 M M M
10/27/2018 8:00 AM 1.20 M M M M remnants of Willa (?) becoming a noreaster
10/28/2018 8:00 AM 0.31 M M M M light rain through yesterday morning as the noreaster went noreast
10/29/2018 8:00 AM 0.05 M M M M two overnight showers
10/30/2018 8:00 AM T M M M M
10/31/2018 8:00 AM 0.00 0.0 M M M
11/1/2018 8:00 AM 0.00 0.0 M M M
11/2/2018 7:30 AM 0.00 0.0 M M M
11/3/2018 7:00 AM 1.10 M M M M
11/4/2018 8:00 AM 0.02 M M M M
11/5/2018 8:00 AM 0.67 M M M M
11/6/2018 8:00 AM 0.73 M M M M lots of rain through the period, some downpours
11/7/2018 8:00 AM 0.54 M M M M
11/8/2018 8:00 AM 0.00 0.0 M M M
11/9/2018 8:00 AM T M M M M
11/10/2018 8:00 AM 0.57 M M M M rain pretty much all day
11/11/2018 8:00 AM 0.00 0.0 M M M
11/12/2018 8:00 AM 0.00 0.0 M M M
11/13/2018 7:45 AM 1.11 M M M M rain during the night, heavy at a few brief times
11/14/2018 8:00 AM 0.02 M M M M
11/15/2018 8:00 AM 0.19 1.1 0.19 1.0 M snowing at time of reading, apparently over a bit of sleet. Our roads were untreated and driving is dangerous. Glad to stay home today. Starting to change back to sleet, hopefully rain later.
11/16/2018 8:00 AM 1.35 M M 0.5 M morning rain/sleet/snow in various combinations, turning to all cold rain in the afternoon. Dangerous driving in the morning, the roads had ice under snow. At time of reading, patches of snow on about 50% of grassy areas.
11/17/2018 8:00 AM 0.00 0.0 M M M
11/18/2018 8:00 AM 0.00 0.0 M T M sunny, breezy, chilly. A few lumps of snow persist in shadiest spots.
11/19/2018 8:00 AM 0.00 0.0 M M M
11/20/2018 7:50 AM 0.00 0.0 M M M
11/21/2018 7:50 AM 0.00 0.0 M M M
11/22/2018 8:00 AM 0.00 0.0 M M M
11/23/2018 8:00 AM 0.00 0.0 M M M
11/24/2018 8:00 AM 0.00 0.0 M M M
11/25/2018 8:00 AM 1.69 M M M M rained around 11 am - 7 pm, heavy at times. Thankfully did not start out as sleet.
11/26/2018 8:00 AM 0.02 M M M M very light rain at time of reading
11/27/2018 8:00 AM 0.26 M M M M
11/28/2018 7:45 AM 0.00 0.0 M M M
11/29/2018 8:00 AM 0.00 0.0 M M M
11/30/2018 8:00 AM 0.00 0.0 M M M
12/1/2018 8:00 AM 0.02 M M M M morning shower
12/2/2018 8:00 AM 0.34 M M M M
12/3/2018 8:00 AM 0.01 M M M M grey drizzly day
12/4/2018 8:00 AM 0.00 0.0 M M M
12/5/2018 8:00 AM 0.00 0.0 M M M
12/6/2018 8:00 AM T T M 0.0 M spotted a few snowflakes while I happened to be outside.
12/7/2018 7:10 AM 0.00 0.0 M M M
12/8/2018 8:00 AM 0.00 0.0 M M M
12/9/2018 8:00 AM 0.00 0.0 M M M
12/10/2018 8:00 AM 0.00 0.0 M 0.0 M The northern edge of the snowstorm skated just south of us. Thank you.
12/11/2018 8:00 AM 0.00 M M M M
12/12/2018 8:00 AM 0.00 0.0 M M M
12/13/2018 8:00 AM 0.00 0.0 M M M
12/14/2018 8:00 AM 0.00 0.0 M M M
12/15/2018 8:00 AM 0.71 M M M M light rain began mid-afternoon, continues through the period, probably moderate intensity at night. Back to having large puddles in the yard.
12/16/2018 8:00 AM 3.35 M M M M holy cow, steady rain all day
12/17/2018 8:00 AM 0.19 M M M M rain through most of the daylight hours. Blue sky cheerful at time of reading.
12/18/2018 8:00 AM 0.00 0.0 M M M
12/19/2018 8:00 AM 0.00 0.0 M M M
12/20/2018 8:00 AM 0.00 0.0 M M M
12/21/2018 8:00 AM 0.51 M M M M rained afternoon and night, storm moving up the seabord
12/22/2018 8:00 AM 0.75 M M M M some showers and downpours, dramatic clouds. Gusty this morning.
12/23/2018 8:00 AM 0.00 0.0 M M M
12/24/2018 8:00 AM 0.04 M M M M
12/25/2018 8:00 AM 0.00 M M M M Merry merry!
12/26/2018 8:00 AM 0.00 0.0 M M M
12/27/2018 8:00 AM 0.00 0.0 M M M
12/28/2018 8:00 AM 0.72 M M M M overnight rain, continues...
12/29/2018 8:00 AM 0.34 M M M M rainy day
12/30/2018 8:00 AM 0.00 0.0 M M M
12/31/2018 8:00 AM 0.00 0.0 M M M
1/1/2019 8:00 AM 0.49 M M M M one last rainy day in a record wet 2018.
1/2/2019 8:00 AM 0.00 0.0 M M M
1/3/2019 8:00 AM 0.00 0.0 M M M
1/4/2019 8:00 AM 0.00 0.0 M M M
1/5/2019 8:00 AM 0.14 M M M M showers overnight
1/6/2019 8:00 AM 0.02 M M M M
1/7/2019 8:00 AM 0.00 0.0 M M M
1/8/2019 8:00 AM 0.07 M M M M mid-night rain. family member said at 11:30 it may have been freezing rain or sleet, initially.
1/9/2019 8:00 AM 0.19 M M M M Got up to about 59 in mid-afternoon. Cold front arrived around 9 PM, gusty wind and pelting rain
1/10/2019 8:00 AM 0.01 T M 0.0 M Very brief precip events in afternoon, at least one was snow flurries. quite windy through the period
1/11/2019 8:00 AM 0.00 0.0 M M M
1/12/2019 8:00 AM 0.00 0.0 M M M
1/13/2019 7:30 AM 0.55 6.2 M 6.0 M light snow began early afternoon, continues; snow came down thicker in the night. For a few hours initially, melted on hard surfaces. Measurements of depth on grass this morning varied by an inch, this is an average.
1/14/2019 8:00 AM 0.59 4.8 M 9.5 M snow ended around 11 PM or so. powdery. roads not too bad, if a plow got to them.
1/15/2019 8:00 AM 0.00 0.0 M 8.0 M sunny day, above freezing
1/16/2019 8:00 AM 0.00 0.0 M 7.5 M Sunny day, cold enough to melt very little snowpack
1/17/2019 8:00 AM 0.00 0.0 M 6.0 M
1/18/2019 8:00 AM 0.16 1.2 M 5.0 M Wet snow in the evening, melted on the streets (just above freezing)
1/19/2019 8:00 AM 0.00 0.0 M 4.5 M
1/20/2019 8:00 AM 1.13 0.0 M 0.5 M rained afternoon into night. some bare patches in the yard.
1/21/2019 8:00 AM 0.00 0.0 M 0.5 M
1/22/2019 8:00 AM 0.00 0.0 M 0.5 M Really frigid yesterday, single-digit windchill
1/23/2019 8:00 AM 0.00 0.0 M T M
1/24/2019 8:00 AM 0.41 0.0 M T M light rain at time of reading
1/25/2019 8:00 AM 0.94 0.0 M T M rain, heavy at times before ending midday, followed by very gusty winds. Still lumps of shoveled snow persist.
1/26/2019 8:00 AM 0.00 0.0 M T M
1/27/2019 8:00 AM 0.00 0.0 M T M
1/28/2019 8:00 AM 0.00 0.0 M T M
1/29/2019 8:00 AM 0.00 0.0 M T M
1/30/2019 8:00 AM 0.15 2.5 M 2.0 M snow through afternoon, ending around 7 PM, may have started as rain. New snow accumulation measured 8 PM,before it settled to current 2.0.
1/31/2019 8:00 AM T T M 1.5 M A few afternoon flakes fell, as a snow squall passed to the north. 4 degrees at 7:30 a.m. this morning.
2/1/2019 8:00 AM 0.01 0.1 M 1.5 M light snow at time of reading
2/2/2019 8:00 AM 0.09 1.2 M 2.0 M light snow from around 8 am - 3 pm or more, new snow measured yesterday before it settled
2/3/2019 8:00 AM 0.00 0.0 M 2.0 M
2/4/2019 8:00 AM 0.00 0.0 M T M
2/5/2019 7:15 AM 0.00 0.0 M T M
2/6/2019 8:00 AM 0.00 0.0 M T M Temp got up to 70 briefly, but still a few shoveled-snow lumps remain
2/7/2019 8:00 AM 0.08 0.0 M T M
2/8/2019 8:00 AM 0.02 M M M M
2/9/2019 8:00 AM T 0.0 M 0.0 M
2/10/2019 8:00 AM 0.00 0.0 M M M
2/11/2019 7:45 AM 0.34 0.2 M T M snow last night changed to sleet and then rain, light rain at time of reading, crunchy snow on grassy areas
2/12/2019 8:00 AM 0.53 M M M M light rain through the period, just above freezing
2/13/2019 8:00 AM 0.53 M M M M ditto to yesterday!
2/14/2019 8:00 AM 0.00 0.0 M M M
2/15/2019 8:00 AM 0.00 0.0 M 0.0 M
2/16/2019 8:00 AM 0.00 0.0 M M M
2/17/2019 8:00 AM 0.00 0.0 M M M
2/18/2019 8:00 AM 0.58 M M M M cold rain all night
2/19/2019 8:00 AM 0.00 0.0 M M M
2/20/2019 8:00 AM 0.18 2.7 M 2.5 M started snowing a couple hours ago, coming down fine and fast, fearing the sleet to come
2/21/2019 8:00 AM 0.71 2.2 M 2.5 M morning snow turned to sleet. Snow on ground has a thick crust. Thin glaze on branches, maybe 1/10".
2/22/2019 8:00 AM 0.01 0.0 M T M overnight shower
2/23/2019 8:00 AM 0.00 0.0 M T M
2/24/2019 8:00 AM 0.75 0.0 M T M rain much of the period
2/25/2019 8:00 AM 0.01 0.0 M T M
2/26/2019 8:00 AM 0.00 0.0 M T M
2/27/2019 8:00 AM 0.00 0.0 M M M
2/28/2019 8:00 AM 0.00 0.0 M T M snowbanks persist
3/1/2019 8:00 AM 0.20 0.3 M 0.3 M
3/2/2019 8:00 AM 0.68 0.1 M T M
3/3/2019 8:00 AM 0.00 0.0 M T M
3/4/2019 8:00 AM 0.65 0.0 M T M rain through much of the period, just above freezing, a little sleet. Still snow piles from last snowfall.
3/5/2019 8:00 AM 0.00 0.0 M T M
3/6/2019 8:00 AM 0.00 0.0 M T M
3/7/2019 8:00 AM 0.00 0.0 M M T Very cold and windy (barely above freezing), those couple of snow piles persist!
3/8/2019 8:00 AM 0.00 0.0 M T M
3/9/2019 8:00 AM 0.19 0.6 M T M wet snow, goodbye winter?
3/10/2019 8:00 AM 0.44 0.0 M T M
3/11/2019 8:00 AM 0.01 0.0 M T M
3/12/2019 8:00 AM 0.00 0.0 M 0.0 M I personally smashed up those last couple of dirty icy snowbanks yesterday afternoon to get them to disappear. Buh-bye, winter.
3/13/2019 8:00 AM 0.00 0.0 M M M
3/14/2019 8:00 AM 0.00 0.0 M M M
3/15/2019 8:00 AM 0.00 0.0 M M M
3/16/2019 8:00 AM 0.00 M M M M
3/17/2019 8:00 AM 0.00 M M M M
3/18/2019 8:00 AM 0.00 0.0 M M M
3/19/2019 8:00 AM T M M M M
3/20/2019 8:00 AM 0.00 0.0 M M M
3/21/2019 8:00 AM 0.44 M M M M rain started some hours ago, continues at time of reading
3/22/2019 8:00 AM 2.44 M M M M Really soggy. Fairly steady, sometimes pouring, rain during the day till very late night.
3/23/2019 8:00 AM 0.12 M M M M Most or all of this from a small thunderstorm that went past about 4PM. Windy, not much thunder. Started with a hailstorm (did a hail report yesterday).
3/24/2019 8:00 AM 0.00 M M M M
3/25/2019 8:00 AM 0.00 0.0 M M M
3/26/2019 8:00 AM T M M M M
3/27/2019 8:00 AM 0.00 0.0 M M M
3/28/2019 8:00 AM 0.00 0.0 M M M
3/29/2019 7:30 AM 0.00 0.0 M M M
3/30/2019 8:00 AM 0.00 0.0 M M M
3/31/2019 8:00 AM 0.01 M M M M
4/1/2019 8:00 AM 0.02 M M M M
4/2/2019 8:00 AM 0.00 0.0 M M M cool and windy - wind chill below freezing till later in the morning!
4/3/2019 8:00 AM 0.01 M M M M
4/4/2019 7:45 AM 0.00 0.0 M M M
4/5/2019 8:30 AM 0.15 M M M M showers started earlier this morning, continuing
4/6/2019 8:00 AM 0.13 M M M M light showers much of the day time
4/7/2019 8:00 AM 0.00 0.0 M M M
4/8/2019 8:00 AM 0.03 M M M M
4/9/2019 8:00 AM 0.01 M M M M
4/10/2019 8:00 AM 0.00 0.0 M M M
4/11/2019 8:00 AM 0.00 M M M M
4/12/2019 8:00 AM 0.00 0.0 M M M
4/13/2019 8:00 AM 0.61 M M M M several showers through the period, distant thunder at 4 a.m.
4/14/2019 8:00 AM 0.01 M M M M
4/15/2019 8:00 AM 0.13 M M M M strong front passed through in early morning, if there was thunder it didn't wake me up, windy now
4/16/2019 8:00 AM 0.01 M M M M
4/17/2019 8:00 AM 0.00 0.0 M M M
4/18/2019 8:00 AM 0.00 0.0 M M M
4/19/2019 8:00 AM 0.00 0.0 M M M
4/20/2019 8:00 AM 0.92 M M M M a couple periods of rain. Strong storm went by about 10 miles to west, apparently a tornado touched down, and a tree fell on a house in Reston. Heard just distant thunder here.
4/21/2019 8:00 AM 0.01 0.0 M M M
4/22/2019 8:00 AM 0.00 0.0 M M M
4/23/2019 8:00 AM 0.00 0.0 M M M
4/24/2019 8:00 AM 0.00 0.0 M M M
4/25/2019 8:00 AM 0.00 0.0 M M M
4/26/2019 8:00 AM 0.07 M M M M late night showers
4/27/2019 8:00 AM 0.52 M M M M Mid afternoon thunderstorm, downpour, windy
4/28/2019 8:00 AM 0.13 M M M M a couple of showers, night and this morning
4/29/2019 8:00 AM 0.00 M M M M
4/30/2019 8:00 AM 0.00 M M M M
5/1/2019 8:00 AM 0.00 0.0 M M M
5/2/2019 8:00 AM 0.00 0.0 M M M
5/7/2019 8:00 AM 0.00 0.0 M M M
5/8/2019 8:00 AM 0.00 0.0 M M M
5/9/2019 8:00 AM 0.00 M M M M
5/10/2019 7:30 AM 0.01 M M M M
5/11/2019 8:00 AM 0.48 M M M M couple of minor thundershowers
5/12/2019 9:00 AM 0.60 M M M M rain began late afternoon, continues
5/13/2019 7:45 AM 0.61 M M M M gentle rains
5/14/2019 8:00 AM 0.23 M M M M light rain for a long time
5/15/2019 8:00 AM 0.00 0.0 M M M
5/16/2019 8:00 AM 0.01 M M M M
5/17/2019 8:00 AM 0.02 M M M M
5/18/2019 8:00 AM 0.00 0.0 M M M
5/19/2019 8:00 AM 0.00 0.0 M M M
5/20/2019 7:30 AM 0.00 0.0 M M M
5/21/2019 8:00 AM 0.00 0.0 M M M
5/22/2019 7:45 AM 0.00 0.0 M M M
5/23/2019 8:00 AM 0.00 0.0 M M M
5/24/2019 8:00 AM 0.32 M M M M very strong storm mid-afternoon. A few branches down in yard. I was about 10 miles to the east at the time and witnessed strong wind gusts and downpour. Thousands of power outages in the county.
5/25/2019 8:00 AM 0.00 0.0 M M M
5/26/2019 8:00 AM 0.10 M M M M
5/27/2019 8:00 AM 0.01 M M M M
5/28/2019 7:00 AM 0.36 M M M M
6/4/2019 8:00 AM 0.00 0.0 M M M
6/5/2019 7:45 AM 0.00 0.0 M M M
6/6/2019 8:00 AM 0.11 M M M M
6/7/2019 8:00 AM 0.00 0.0 M M M
6/8/2019 8:00 AM 0.00 0.0 M M M
6/9/2019 8:00 AM 0.00 0.0 M M M
6/10/2019 8:00 AM 0.38 M M M M showers midday and continued
6/11/2019 7:45 AM 0.10 M M M M
6/12/2019 7:25 AM 0.00 0.0 M M M
6/13/2019 8:00 AM 0.83 M M M M
6/14/2019 8:00 AM 0.07 M M M M
6/15/2019 8:00 AM 0.00 0.0 M M M
6/16/2019 8:00 AM 0.00 0.0 M M M
6/17/2019 8:00 AM 0.01 M M M M brief evening shower
6/18/2019 8:00 AM 0.39 M M M M scattered mild thunderstorms
6/19/2019 8:00 AM 0.29 M M M M a couple showers, minor thunderstorm. typical muggy weather
6/20/2019 8:00 AM 0.03 M M M M
6/21/2019 8:00 AM 0.07 M M M M
6/22/2019 8:00 AM 0.00 0.0 M M M
6/23/2019 8:00 AM 0.00 0.0 M M M
6/24/2019 8:00 AM 0.00 M M M M
6/25/2019 8:00 AM 0.71 M M M M
6/26/2019 8:00 AM 0.00 0.0 M M M
6/27/2019 8:00 AM 0.00 0.0 M M M
6/28/2019 8:00 AM 0.42 M M M M
6/29/2019 8:00 AM 0.40 M M M M another day of afternoon popup thunderstorms
6/30/2019 8:00 AM 0.03 M M M M Caught a little of those pop-up thunderstorms. Hot and humid, uncomfortable to be outside, poor air quality.
7/1/2019 8:00 AM 0.00 0.0 M M M
7/2/2019 8:00 AM 0.00 0.0 M M M
7/3/2019 8:00 AM 0.64 M M M M evening thunderstorm monsoon
7/4/2019 8:00 AM 0.01 M M M M very brief afternoon shower
7/5/2019 8:00 AM 0.34 M M M M
7/6/2019 8:00 AM 0.00 0.0 M M M
7/7/2019 8:00 AM 0.25 M M M M the southern edge of a couple of evening thunderstorms
7/8/2019 7:30 AM 0.04 M M M M
7/9/2019 8:00 AM 3.74 M M M M Epic rain in the morning, most fell in an hour. I was in downtown DC at the time. Major, major event. Floating cars, washed out roads. *****need new categories in the flooding options below, as these events become more frequent. :(
7/10/2019 8:00 AM 0.00 0.0 M M M
7/11/2019 8:00 AM 0.00 M M M M
7/12/2019 8:00 AM 0.73 M M M M Two late-afternoon thunderstorms, the second had longer duration, both had monsoons
7/13/2019 8:00 AM 0.00 0.0 M M M
7/14/2019 8:00 AM 0.00 0.0 M M M
7/15/2019 8:00 AM 0.00 0.0 M M M
7/16/2019 8:00 AM 0.00 0.0 M M M
7/17/2019 8:00 AM 0.00 0.0 M M M
7/18/2019 8:00 AM 0.37 M M M M Thunderstorm around 5:30 pm; very gusty winds, monsoon rain. Very hot and muggy till then.
7/19/2019 8:00 AM 0.00 0.0 M M M
7/20/2019 8:00 AM 0.00 0.0 M M M
7/21/2019 8:00 AM 0.00 0.0 M M M Horribly hot - temp in high 90s, does feel like being in an oven
7/22/2019 8:00 AM T M M M M hottest, most uncomfortable weather in my memory. thunderstorms in evening but just a few spits of rain
7/23/2019 8:00 AM 0.38 M M M M Rain mostly overnight. Light rain and a lovely 70 degrees at time of reading. Heavy thunderstorms slid to our northwest last night, missed heavy weather.
7/24/2019 8:00 AM 0.07 M M M M light rain in the morning. very pleasant weather, around 70 degrees
7/25/2019 8:00 AM 0.23 M M M M Thunder and rain from not-very-dark evening clouds. Must have formed overhead, it dumped over Alexandria and DC
7/26/2019 8:00 AM 0.00 0.0 M M M
7/27/2019 8:00 AM 0.00 0.0 M M M
7/28/2019 8:00 AM 0.00 0.0 M M M
7/29/2019 8:00 AM 0.00 0.0 M M M
7/30/2019 8:00 AM 0.00 0.0 M M M
7/31/2019 8:00 AM 0.00 0.0 M M M
8/1/2019 8:00 AM 0.02 M M M M
8/2/2019 8:00 AM 0.00 0.0 M M M
8/3/2019 8:00 AM 0.00 0.0 M M M
8/4/2019 8:00 AM 0.19 M M M M Must have happened overnight?!?
8/5/2019 8:00 AM 0.00 0.0 M M M
8/6/2019 8:00 AM 0.00 0.0 M M M
8/7/2019 8:00 AM 0.02 M M M M
8/8/2019 8:00 AM 1.12 M M M M thunderstorm
8/9/2019 8:00 AM 0.00 0.0 M M M
8/10/2019 8:00 AM 0.00 0.0 M M M
8/11/2019 8:00 AM 0.00 0.0 M M M beautiful day - 80's, low humidity, puffy clouds
8/12/2019 8:00 AM 0.00 0.0 M M M another lovely day
8/13/2019 8:00 AM 0.00 M M M M
8/18/2019 8:00 AM 0.00 M M M M
8/19/2019 8:00 AM 0.16 M M M M A brief downpour around 6:30 a.m.
8/20/2019 8:00 AM 0.74 M M M M Intense thunderstorm around 10:30-11 PM. Many cloud to ground lightning strikes. Some hail, couldn't get outside for a better look at it but seemed pea-sized. Did a hail report last night.
8/21/2019 8:00 AM 0.36 M M M M another later afternoon thunderstorm
8/22/2019 8:00 AM T M M M M light rain essentially evaporated on contact
8/23/2019 8:00 AM T M M M M
8/24/2019 8:00 AM 0.39 M M M M gentle rain til late afternoon. Welcome cool-down
8/25/2019 8:00 AM 0.00 0.0 M M M
8/26/2019 8:00 AM 0.00 0.0 M M M
8/27/2019 8:00 AM 0.00 0.0 M M M
8/28/2019 8:00 AM 0.00 0.0 M M M foggy morning
8/29/2019 8:00 AM 0.19 M M M M squall went through about 3 pm
8/30/2019 8:00 AM 0.00 0.0 M M M
8/31/2019 8:00 AM 0.00 0.0 M M M
9/1/2019 8:00 AM 0.00 0.0 M M M
9/2/2019 8:00 AM 0.00 0.0 M M M
9/3/2019 8:00 AM 0.29 M M M M dinnertime storm
9/4/2019 8:00 AM 0.00 0.0 M M M
9/5/2019 8:00 AM 0.00 0.0 M M M a cold front with no rain. Outer band of hurricane Dorian overhead (eye off S Carolina)
9/6/2019 8:00 AM 0.00 0.0 M M M
9/7/2019 8:00 AM 0.00 0.0 M M M high clouds, balmy breezes, nice day - as Dorian went over Delmarva
9/8/2019 8:00 AM 0.00 0.0 M M M
9/9/2019 8:00 AM 0.01 M M M M morning light shower
9/10/2019 8:00 AM 0.00 0.0 M M M
9/11/2019 8:00 AM 0.00 0.0 M M M
9/12/2019 8:00 AM 0.08 M M M M thunderstorm
9/13/2019 8:00 AM 0.03 M M M M yesterday very hot - mid 90s, perhaps a record. Surprised no storms as a cold front over night, low 70s today, with sprinkles/misty.
9/14/2019 8:00 AM T M M M M
9/15/2019 8:00 AM 0.00 0.0 M M M warm and rather muggy
9/16/2019 8:00 AM 0.00 0.0 M M M
9/17/2019 8:00 AM T M M M M a few raindrops
9/18/2019 8:00 AM 0.00 0.0 M M M
9/19/2019 8:00 AM 0.00 M M M M
9/20/2019 8:00 AM 0.00 0.0 M M M Another lovely temperate day, but ground getting pretty dry
9/21/2019 8:00 AM 0.00 0.0 M M M
9/22/2019 8:00 AM 0.00 0.0 M M M
9/23/2019 8:00 AM 0.00 0.0 M M M
9/24/2019 8:00 AM T M M M M Happened to be outside and felt a couple raindrops, weak front through late evening
9/25/2019 8:00 AM 0.00 0.0 M M M
9/26/2019 8:00 AM 0.00 0.0 M M M another hot dry day. front yard grass/weeds (sunny part) getting brown.
9/27/2019 8:00 AM 0.00 0.0 M M M
9/28/2019 8:00 AM 0.00 0.0 M M M
9/29/2019 8:00 AM 0.00 0.0 M M M
9/30/2019 7:30 AM 0.00 0.0 M M M



Start Date End Date & Time Duration in Days Precipitation Snow Depth Snow Depth SWE Notes
5/3/2019 5/06/2019 8:00 AM 4 2.55 M M
5/29/2019 6/03/2019 8:00 AM 6 0.38 M M some thunderstorms during the period
8/14/2019 8/17/2019 8:00 AM 4 1.62 M M Looks like we missed some significant showers/storms on 8/14 and 8/16



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
3/22/2019 3:56 PM It is raining now. Gusty wind just before hail fell. Looked like a snowstorm at first. Raining now and still windy. 3/8" 1/4" Pea Size Rice Soft|White Ice 4 1min no damage Continuous False Before rain Same time as smaller hail