Station Overview Station Location
Station Number VA-FXC-1 Latitude 38.8679
Station Name Fairfax 1.0 N Longitude -77.2999
County Fairfax (city) Elevation (ft) 360



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 3.52 2.89 31 1.52 27 1.37 4 2 9 0 0.0 0 0
Nov 18 3.27 7.76 30 7.76 30 0.00 0 0 10 3 0.0 0 1
Dec 18 3.13 5.51 31 5.51 26 0.00 5 0 9 1 0.0 0 0
Jan 19 2.92 5.62 28 4.20 27 1.42 1 1 11 3 13.1 4 10
Feb 19 2.69 3.55 28 2.73 26 0.82 2 1 11 2 4.6 3 4
March 19 3.60 4.75 31 4.18 28 0.57 3 1 7 2 0.3 1 0
April 19 3.27 2.83 30 2.72 27 0.11 3 1 11 1 0.0 0 0
May 19 4.18 5.06 31 5.06 31 0.00 0 0 13 2 0.0 0 0
June 19 3.95 4.62 30 4.20 27 0.42 3 1 11 1 0.0 0 0
July 19 4.03 6.34 31 6.16 28 0.18 3 1 9 1 0.0 0 0
Aug 19 3.31 6.75 31 6.75 31 0.00 0 0 10 1 0.0 0 0
Sept 19 4.01 0.48 30 0.48 30 0.00 0 0 3 2 0.0 0 0
Water Year Totals: 41.88" 56.16" 362 days 51.27" 338 4.89" 24 days 8 114 days 19 days 18.0" 8 days 15 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 0.01
10/7/2018 0.00
10/8/2018 0.00
10/9/2018 0.00
10/10/2018 0.00
10/11/2018 0.26
10/12/2018 0.83
10/13/2018 0.05
10/14/2018 0.01
10/15/2018 0.18
10/16/2018 0.07
10/17/2018 0.00
10/18/2018 0.00
10/19/2018 0.00
10/20/2018 0.09
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 **
10/28/2018 1.34
10/29/2018 **
10/30/2018 0.03
10/31/2018 0.00
11/1/2018 0.00
11/2/2018 T
11/3/2018 1.06
11/4/2018 0.00
11/5/2018 0.30
11/6/2018 0.84
11/7/2018 0.67
11/8/2018 0.00
11/9/2018 0.01
11/10/2018 0.52
11/11/2018 0.00
11/12/2018 0.00
11/13/2018 1.01
11/14/2018 0.00
11/15/2018 T
11/16/2018 1.51
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 1.59
11/26/2018 T
11/27/2018 0.25
11/28/2018 0.00
11/29/2018 0.00
11/30/2018 0.00
12/1/2018 0.01
12/2/2018 0.28
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 1.19
12/16/2018 2.89
12/17/2018 0.06
12/18/2018 0.00
12/19/2018 0.00
12/20/2018 0.00
12/21/2018 0.51
12/22/2018 0.53
12/23/2018 0.00
12/24/2018 0.03
12/25/2018 0.00
12/26/2018 0.00
12/27/2018 **
12/28/2018 **
12/29/2018 **
12/30/2018 **
12/31/2018 **
Day of YearDaily PrcpMultiday Prcp
1/1/2019 1.42
1/2/2019 0.00
1/3/2019 0.00
1/4/2019 0.00
1/5/2019 0.11
1/6/2019 0.02
1/7/2019 0.00
1/8/2019 0.07
1/9/2019 0.27
1/10/2019 T
1/11/2019 0.00
1/12/2019
1/13/2019 0.55
1/14/2019 0.39
1/15/2019 0.00
1/16/2019 0.00
1/17/2019 0.00
1/18/2019 0.14
1/19/2019 0.00
1/20/2019 1.04
1/21/2019 T
1/22/2019 0.00
1/23/2019 0.00
1/24/2019 0.48
1/25/2019 0.95
1/26/2019 0.00
1/27/2019 0.00
1/28/2019
1/29/2019
1/30/2019 0.18
1/31/2019 T
2/1/2019 T
2/2/2019 0.04
2/3/2019 0.00
2/4/2019 0.00
2/5/2019 T
2/6/2019 0.00
2/7/2019 0.06
2/8/2019 0.01
2/9/2019 0.01
2/10/2019 0.00
2/11/2019 **
2/12/2019 0.82
2/13/2019 0.45
2/14/2019 0.00
2/15/2019 0.00
2/16/2019 0.00
2/17/2019 0.00
2/18/2019 0.51
2/19/2019 0.00
2/20/2019 0.27
2/21/2019 0.62
2/22/2019 0.02
2/23/2019 0.00
2/24/2019 0.73
2/25/2019 0.01
2/26/2019 0.00
2/27/2019 0.00
2/28/2019 0.00
3/1/2019 0.19
3/2/2019 0.61
3/3/2019 0.00
3/4/2019 0.56
3/5/2019 0.00
3/6/2019 0.00
3/7/2019 0.00
3/8/2019 0.00
3/9/2019 **
3/10/2019 **
3/11/2019 0.57
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 0.31
3/22/2019 2.44
3/23/2019 0.04
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 0.03
Day of YearDaily PrcpMultiday Prcp
4/1/2019 T
4/2/2019 0.00
4/3/2019 0.01
4/4/2019 0.00
4/5/2019 0.14
4/6/2019 0.13
4/7/2019 0.00
4/8/2019 0.03
4/9/2019 0.04
4/10/2019 0.00
4/11/2019 0.00
4/12/2019 0.00
4/13/2019 0.67
4/14/2019 0.01
4/15/2019 0.11
4/16/2019 0.00
4/17/2019 0.00
4/18/2019 0.00
4/19/2019 0.00
4/20/2019 1.06
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 0.05
4/27/2019 0.47
4/28/2019 **
4/29/2019 **
4/30/2019 0.11
5/1/2019 0.00
5/2/2019 0.00
5/3/2019 0.36
5/4/2019 0.04
5/5/2019 1.26
5/6/2019 0.66
5/7/2019 0.00
5/8/2019 0.00
5/9/2019 0.00
5/10/2019 T
5/11/2019 0.31
5/12/2019 0.52
5/13/2019 0.58
5/14/2019 0.22
5/15/2019 0.00
5/16/2019 0.00
5/17/2019 0.01
5/18/2019 0.00
5/19/2019 T
5/20/2019 0.00
5/21/2019 0.00
5/22/2019 0.00
5/23/2019 0.00
5/24/2019 0.50
5/25/2019 0.00
5/26/2019 0.07
5/27/2019 0.00
5/28/2019 0.00
5/29/2019 0.25
5/30/2019 0.00
5/31/2019 0.28
6/1/2019 0.00
6/2/2019 0.00
6/3/2019 0.12
6/4/2019 0.00
6/5/2019 0.00
6/6/2019 T
6/7/2019 0.00
6/8/2019 0.00
6/9/2019 **
6/10/2019 **
6/11/2019 0.42
6/12/2019 0.00
6/13/2019 0.76
6/14/2019 0.14
6/15/2019 0.00
6/16/2019 0.00
6/17/2019 0.00
6/18/2019 0.78
6/19/2019 0.99
6/20/2019 0.02
6/21/2019 0.08
6/22/2019 0.00
6/23/2019 0.00
6/24/2019 0.00
6/25/2019 0.72
6/26/2019 0.00
6/27/2019 0.00
6/28/2019 0.54
6/29/2019 0.01
6/30/2019 0.04
Day of YearDaily PrcpMultiday Prcp
7/1/2019 0.00
7/2/2019 0.00
7/3/2019 1.33
7/4/2019 0.00
7/5/2019 0.17
7/6/2019 **
7/7/2019 **
7/8/2019 0.18
7/9/2019 2.68
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 T
7/18/2019 0.40
7/19/2019 0.00
7/20/2019 0.00
7/21/2019 0.00
7/22/2019 0.27
7/23/2019 0.38
7/24/2019 0.02
7/25/2019 0.18
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 0.11
8/5/2019 0.00
8/6/2019 0.00
8/7/2019 0.00
8/8/2019 1.29
8/9/2019 0.00
8/10/2019 0.01
8/11/2019 0.00
8/12/2019 0.00
8/13/2019 0.00
8/14/2019 0.81
8/15/2019 0.00
8/16/2019 2.76
8/17/2019 0.00
8/18/2019 0.00
8/19/2019 0.00
8/20/2019 0.56
8/21/2019 0.52
8/22/2019 T
8/23/2019 0.00
8/24/2019 0.57
8/25/2019 0.00
8/26/2019 0.00
8/27/2019 0.00
8/28/2019 0.00
8/29/2019 0.10
8/30/2019 0.00
8/31/2019 0.00
9/1/2019 0.00
9/2/2019 0.00
9/3/2019 0.19
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 0.00
9/10/2019 0.00
9/11/2019 0.00
9/12/2019 0.27
9/13/2019 0.02
9/14/2019 0.00
9/15/2019 0.00
9/16/2019 0.00
9/17/2019 0.00
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 T
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 7:00 AM 0.00 0.0 M 0.0 M
10/2/2018 7:00 AM 0.00 0.0 M 0.0 M
10/3/2018 7:00 AM 0.00 0.0 M 0.0 M
10/4/2018 7:00 AM 0.00 0.0 M 0.0 M
10/5/2018 7:00 AM 0.00 0.0 M 0.0 M
10/6/2018 7:00 AM 0.01 0.0 M 0.0 M Drizzle
10/7/2018 7:00 AM 0.00 0.0 M 0.0 M Drove through areas of drizzle nearby, but there wasn't evidence of any at the observation location.
10/8/2018 7:00 AM 0.00 0.0 M 0.0 M Believe moisture on gauge funnel was dew.
10/9/2018 7:00 AM 0.00 0.0 M 0.0 M
10/10/2018 7:00 AM 0.00 0.0 M 0.0 M
10/11/2018 7:00 AM 0.26 0.0 M 0.0 M
10/12/2018 7:00 AM 0.83 0.0 M 0.0 M
10/13/2018 7:00 AM 0.05 0.0 M 0.0 M
10/14/2018 7:00 AM 0.01 0.0 M 0.0 M
10/15/2018 7:25 AM 0.18 0.0 M 0.0 M Light rain at time of observation
10/16/2018 7:00 AM 0.07 0.0 M 0.0 M
10/17/2018 7:00 AM 0.00 0.0 M 0.0 M
10/18/2018 7:00 AM 0.00 0.0 M 0.0 M
10/19/2018 7:00 AM 0.00 0.0 M 0.0 M
10/20/2018 7:00 AM 0.09 0.0 M 0.0 M
10/21/2018 7:00 AM 0.02 0.0 M 0.0 M
10/22/2018 7:00 AM 0.00 0.0 M M M
10/23/2018 7:00 AM 0.00 0.0 M M M
10/24/2018 7:00 AM 0.00 0.0 M M M
10/25/2018 7:00 AM 0.00 0.0 M M M
10/26/2018 7:00 AM 0.00 0.0 M 0.0 M
10/31/2018 7:00 AM 0.00 0.0 M M M
11/1/2018 7:00 AM 0.00 0.0 M M M
11/2/2018 7:00 AM T 0.0 M 0.0 M
11/3/2018 7:00 AM 1.06 0.0 M 0.0 M
11/4/2018 7:00 AM 0.00 0.0 M M M
11/5/2018 6:20 AM 0.30 0.0 M 0.0 M
11/6/2018 6:20 AM 0.84 0.0 M 0.0 M Most rain fell during the morning hours Monday, followed by occasional light rain and drizzle that continued through observation time.
11/7/2018 7:00 AM 0.67 0.0 M 0.0 M
11/8/2018 7:00 AM 0.00 0.0 M M M
11/9/2018 7:20 AM 0.01 0.0 M 0.0 M Light rain at time of observation.
11/10/2018 7:00 AM 0.52 0.0 M 0.0 M
11/11/2018 7:00 AM 0.00 0.0 M 0.0 M
11/12/2018 7:00 AM 0.00 0.0 M 0.0 M
11/13/2018 6:20 AM 1.01 0.0 M 0.0 M Bulk of rain during evening -> night. Light drizzle/mist at time of observation.
11/14/2018 7:00 AM 0.00 0.0 M M M
11/15/2018 6:00 AM T T M T M Light snow/sleet/rain had started to fall and was beginning to stick on elevated surfaces
11/16/2018 7:00 AM 1.51 M M 0.5 M Estimated amount -- there was some spillover when pouring water from outer tube to inner tube. There was also snow, but was not present to measure before precipitation changed to rain. Compacted snow still on ground this morning.
11/17/2018 7:00 AM 0.00 0.0 M 0.0 M
11/18/2018 7:00 AM 0.00 0.0 M M M
11/19/2018 7:00 AM 0.00 0.0 M M M
11/20/2018 7:00 AM 0.00 0.0 M M M
11/21/2018 7:00 AM 0.00 0.0 M M M
11/22/2018 7:00 AM 0.00 0.0 M M M
11/23/2018 7:00 AM 0.00 0.0 M 0.0 M
11/24/2018 7:00 AM 0.00 0.0 M 0.0 M
11/25/2018 7:00 AM 1.59 0.0 M 0.0 M
11/26/2018 7:00 AM T 0.0 M 0.0 M
11/27/2018 7:00 AM 0.25 0.0 M 0.0 M
11/28/2018 7:00 AM 0.00 0.0 M 0.0 M
11/29/2018 7:00 AM 0.00 0.0 M 0.0 M
11/30/2018 7:00 AM 0.00 0.0 M 0.0 M
12/1/2018 7:00 AM 0.01 0.0 M 0.0 M
12/2/2018 7:00 AM 0.28 0.0 M 0.0 M
12/3/2018 7:00 AM 0.01 0.0 M 0.0 M
12/4/2018 7:00 AM 0.00 0.0 M M M
12/5/2018 7:00 AM 0.00 0.0 M M M
12/6/2018 7:00 AM T T M 0.0 M About 5 minutes of flurries Wednesday afternoon
12/7/2018 7:00 AM 0.00 0.0 M 0.0 M
12/8/2018 7:00 AM 0.00 0.0 M 0.0 M
12/9/2018 7:00 AM 0.00 0.0 M 0.0 M
12/10/2018 7:00 AM 0.00 0.0 M 0.0 M
12/11/2018 7:00 AM 0.00 0.0 M 0.0 M
12/12/2018 7:00 AM 0.00 0.0 M M M
12/13/2018 7:00 AM 0.00 0.0 M M M
12/14/2018 7:00 AM 0.00 0.0 M M M
12/15/2018 10:30 AM 1.19 0.0 M 0.0 M Steady rain
12/16/2018 10:00 AM 2.89 0.0 M 0.0 M Light rain continuing at time of observation.
12/17/2018 7:00 AM 0.06 0.0 M 0.0 M
12/18/2018 7:00 AM 0.00 0.0 M 0.0 M
12/19/2018 7:00 AM 0.00 0.0 M 0.0 M
12/20/2018 7:00 AM 0.00 0.0 M 0.0 M
12/21/2018 9:00 AM 0.51 0.0 M 0.0 M
12/22/2018 7:00 AM 0.53 0.0 M 0.0 M
12/23/2018 7:00 AM 0.00 0.0 M 0.0 M
12/24/2018 7:00 AM 0.03 0.0 M 0.0 M
12/25/2018 7:00 AM 0.00 0.0 M 0.0 M
12/26/2018 7:00 AM 0.00 0.0 M 0.0 M
1/2/2019 7:00 AM 0.00 0.0 M 0.0 M
1/3/2019 7:00 AM 0.00 0.0 M 0.0 M
1/4/2019 7:00 AM 0.00 0.0 M 0.0 M
1/5/2019 7:00 AM 0.11 0.0 M 0.0 M
1/6/2019 7:00 AM 0.02 0.0 M 0.0 M
1/7/2019 7:00 AM 0.00 0.0 M 0.0 M
1/8/2019 7:00 AM 0.07 0.0 M 0.0 M
1/9/2019 7:00 AM 0.27 0.0 M 0.0 M
1/10/2019 7:00 AM T T M 0.0 M afternoon flurries
1/11/2019 7:00 AM 0.00 0.0 M 0.0 M
1/13/2019 9:15 AM 0.55 5.8 M 6.0 M Fine flurries at time of observation. Despite 10.5 to 1 ratio, it's a dry snow - no snowballs. So perhaps there may have been some settling.
1/14/2019 9:00 AM 0.39 3.9 M 8.5 0.94 Heaviest snow during late afternoon and early evening. Did not see any evidence of freezing drizzle or other precipitation types.
1/15/2019 7:00 AM 0.00 0.0 M 7.5 M
1/16/2019 7:00 AM 0.00 0.0 M 6.5 0.87 Observation/core sample site is relatively shaded.
1/17/2019 7:00 AM 0.00 0.0 M 5.0 M
1/18/2019 7:00 AM 0.14 1.4 M 5.5 M Precipitation estimated since can wasn't outside during first part of storm and didn't think about taking a core from the snowboard. :-( There may have been some melting and compacting due to above freezing temperatures and drizzle at the end of the storm.
1/19/2019 7:00 AM 0.00 0.0 M 4.0 0.75
1/20/2019 7:00 AM 1.04 0.0 M 1.5 M No snow seen by observer although some flakes were reported in the area. Drizzle continuing at time of observation.
1/21/2019 7:00 AM T 0.0 M T M Snow now generally confined to shaded areas (and piles)
1/22/2019 7:00 AM 0.00 0.0 M T M
1/23/2019 7:00 AM 0.00 0.0 M T M
1/24/2019 9:25 AM 0.48 0.0 M 0.0 M Light rain at time of observation. Only snow is left in old piles now.
1/25/2019 7:00 AM 0.95 0.0 M 0.0 M
1/26/2019 7:00 AM 0.00 0.0 M 0.0 M
1/27/2019 7:00 AM 0.00 0.0 M 0.0 M
1/30/2019 7:00 AM 0.18 2.0 M 2.0 M Precipitation began as rain and sleet before changing over to snow that included large dendrites/aggregates. The snow was very "clingy" with probably close to an inch of snow built up around the rim of the gauge. Due to the fluffy nature, the surface of the snow pack was quite uneven, even on the snowboard (depth ranged from 1.8 - 2.2).
1/31/2019 7:00 AM T T M 1.0 M A few flurries as an Arctic cold front moved through.
2/1/2019 7:00 AM T T M 1.0 M Flurries starting
2/2/2019 7:00 AM 0.04 0.9 M 2.0 M A fine snow fell for a good part of the daylight hours
2/3/2019 7:00 AM 0.00 0.0 M T M Less than an inch of snow remains on the ground in shaded areas
2/4/2019 7:00 AM 0.00 0.0 M 0.0 M Temperatures in the 50s took care of most of the remaining snow.
2/5/2019 7:00 AM T 0.0 M 0.0 M Overnight sprinkles
2/6/2019 7:00 AM 0.00 0.0 M 0.0 M
2/7/2019 7:00 AM 0.06 0.0 M 0.0 M
2/8/2019 7:30 AM 0.01 0.0 M 0.0 M Light rain at time of observation
2/9/2019 7:00 AM 0.01 0.0 M 0.0 M
2/10/2019 7:00 AM 0.00 0.0 M 0.0 M
2/13/2019 7:00 AM 0.45 0.0 M 0.0 M
2/14/2019 7:00 AM 0.00 0.0 M 0.0 M
2/15/2019 7:00 AM 0.00 0.0 M 0.0 M
2/16/2019 7:00 AM 0.00 0.0 M 0.0 M
2/17/2019 7:00 AM 0.00 0.0 M 0.0 M
2/18/2019 7:00 AM 0.51 0.0 M 0.0 M Just a cold rain as far as I could tell.
2/19/2019 7:00 AM 0.00 0.0 M 0.0 M
2/20/2019 9:00 AM 0.27 2.6 M 2.5 M All snow at this point, still falling.
2/21/2019 7:00 AM 0.62 1.1 M 2.0 0.56 Snow transitioned to about an hour of sleet then to freezing rain during the midday hours. Maximum snowfall was measured shortly after the transition to sleet. Temperatures hovered near freezing until precipitation ended overnight. A thin glaze of ice accreted on vegetation and elevated surfaces - around 0.03 inches.
2/22/2019 7:00 AM 0.02 0.0 M 0.0 M Only snow left is in piles.
2/23/2019 7:00 AM 0.00 0.0 M 0.0 M
2/24/2019 7:00 AM 0.73 0.0 M 0.0 M
2/25/2019 7:00 AM 0.01 0.0 M 0.0 M
2/26/2019 7:00 AM 0.00 0.0 M 0.0 M
2/27/2019 7:00 AM 0.00 0.0 M 0.0 M
2/28/2019 7:00 AM 0.00 0.0 M 0.0 M
3/1/2019 7:00 AM 0.19 0.3 M T M Some mixture of rain, (not much) snow, and sleet. Thin icy layer difficult to measure and certainly doesn't "look" like much.
3/2/2019 7:00 AM 0.61 0.0 M 0.0 M
3/3/2019 7:00 AM 0.00 0.0 M 0.0 M
3/4/2019 7:00 AM 0.56 T M 0.0 M A few fine and/or wet snowflakes at times but mainly rain. No snow accumulation.
3/5/2019 7:00 AM 0.00 0.0 M 0.0 M
3/6/2019 7:00 AM 0.00 0.0 M 0.0 M There were some reports of flurries in the area overnight, but nothing was evident at my location this morning.
3/7/2019 7:00 AM 0.00 0.0 M 0.0 M
3/8/2019 7:00 AM 0.00 0.0 M 0.0 M
3/12/2019 7:00 AM 0.00 0.0 M 0.0 M
3/13/2019 7:00 AM 0.00 0.0 M 0.0 M
3/14/2019 7:00 AM 0.00 0.0 M 0.0 M
3/15/2019 7:00 AM 0.00 0.0 M 0.0 M
3/16/2019 7:00 AM 0.00 0.0 M 0.0 M
3/17/2019 7:00 AM 0.00 0.0 M 0.0 M
3/18/2019 7:00 AM 0.00 0.0 M 0.0 M No moisture observed
3/19/2019 7:00 AM T M M M M A few sprinkles Monday morning. Can't say for sure if there were any snowflakes mixed in.
3/20/2019 7:00 AM 0.00 0.0 M 0.0 M
3/21/2019 7:00 AM 0.31 0.0 M 0.0 M
3/22/2019 7:00 AM 2.44 0.0 M 0.0 M
3/23/2019 7:00 AM 0.04 M M 0.0 M Thunderstorm with gusty winds. Looked like some frozen precipitation was mixed in with the rain, but could not identify if it was hail or graupel.
3/24/2019 7:00 AM 0.00 0.0 M 0.0 M
3/25/2019 7:00 AM 0.00 0.0 M 0.0 M
3/26/2019 7:00 AM T 0.0 M 0.0 M Just sprinkles
3/27/2019 7:00 AM 0.00 0.0 M 0.0 M
3/28/2019 7:00 AM 0.00 0.0 M 0.0 M
3/29/2019 7:00 AM 0.00 0.0 M 0.0 M
3/30/2019 7:00 AM 0.00 0.0 M 0.0 M
3/31/2019 8:50 AM 0.03 0.0 M 0.0 M Light rain at time of observation
4/1/2019 7:00 AM T 0.0 M 0.0 M
4/2/2019 7:00 AM 0.00 0.0 M 0.0 M
4/3/2019 7:00 AM 0.01 0.0 M 0.0 M
4/4/2019 7:00 AM 0.00 0.0 M 0.0 M
4/5/2019 8:00 AM 0.14 0.0 M 0.0 M Light rain at time of observation
4/6/2019 7:00 AM 0.13 0.0 M 0.0 M
4/7/2019 7:00 AM 0.00 0.0 M 0.0 M
4/8/2019 7:00 AM 0.03 0.0 M 0.0 M
4/9/2019 7:00 AM 0.04 0.0 M 0.0 M
4/10/2019 7:00 AM 0.00 0.0 M 0.0 M
4/11/2019 7:00 AM 0.00 0.0 M 0.0 M
4/12/2019 7:00 AM 0.00 0.0 M 0.0 M
4/13/2019 7:00 AM 0.67 0.0 M 0.0 M And a layer of pollen. At least one rumble of thunder and heavy rain (as heard by half asleep observer) occurred overnight.
4/14/2019 7:00 AM 0.01 0.0 M 0.0 M
4/15/2019 7:00 AM 0.11 0.0 M 0.0 M
4/16/2019 7:00 AM 0.00 0.0 M 0.0 M
4/17/2019 7:00 AM 0.00 0.0 M 0.0 M
4/18/2019 7:00 AM 0.00 0.0 M 0.0 M
4/19/2019 7:00 AM 0.00 0.0 M 0.0 M
4/20/2019 7:00 AM 1.06 0.0 M 0.0 M
4/21/2019 7:00 AM 0.00 0.0 M 0.0 M
4/22/2019 7:00 AM 0.00 0.0 M 0.0 M
4/23/2019 7:00 AM 0.00 0.0 M 0.0 M
4/24/2019 7:00 AM 0.00 0.0 M 0.0 M
4/25/2019 7:00 AM 0.00 0.0 M 0.0 M
4/26/2019 7:00 AM 0.05 0.0 M 0.0 M
4/27/2019 7:00 AM 0.47 0.0 M 0.0 M
5/1/2019 7:00 AM 0.00 0.0 M 0.0 M
5/2/2019 7:00 AM 0.00 0.0 M 0.0 M
5/3/2019 7:00 AM 0.36 0.0 M 0.0 M
5/4/2019 7:00 AM 0.04 0.0 M 0.0 M
5/5/2019 9:15 AM 1.26 0.0 M 0.0 M Light rain at time of observation
5/6/2019 7:00 AM 0.66 0.0 M 0.0 M
5/7/2019 7:00 AM 0.00 0.0 M 0.0 M
5/8/2019 7:00 AM 0.00 0.0 M 0.0 M
5/9/2019 7:00 AM 0.00 0.0 M 0.0 M
5/10/2019 7:00 AM T 0.0 M 0.0 M
5/11/2019 7:00 AM 0.31 0.0 M 0.0 M
5/12/2019 8:15 AM 0.52 0.0 M 0.0 M Light rain at time of observation
5/13/2019 8:10 AM 0.58 0.0 M 0.0 M Intermittent rain continuing
5/14/2019 7:00 AM 0.22 0.0 M 0.0 M
5/15/2019 7:00 AM 0.00 0.0 M 0.0 M
5/16/2019 7:00 AM 0.00 0.0 M 0.0 M
5/17/2019 7:00 AM 0.01 0.0 M 0.0 M
5/18/2019 7:00 AM 0.00 0.0 M 0.0 M
5/19/2019 7:00 AM T 0.0 M 0.0 M A thunderstorm skirted the area overnight
5/20/2019 7:00 AM 0.00 0.0 M 0.0 M
5/21/2019 7:00 AM 0.00 0.0 M 0.0 M
5/22/2019 7:00 AM 0.00 0.0 M 0.0 M
5/23/2019 7:00 AM 0.00 0.0 M 0.0 M
5/24/2019 7:00 AM 0.50 0.0 M 0.0 M
5/25/2019 7:00 AM 0.00 0.0 M 0.0 M
5/26/2019 7:00 AM 0.07 0.0 M 0.0 M
5/27/2019 7:00 AM 0.00 0.0 M 0.0 M
5/28/2019 6:00 AM 0.00 0.0 M 0.0 M I left house early today...looked like rain started between 6 and 7...so will have that included in the 5/29 report.
5/29/2019 7:00 AM 0.25 0.0 M 0.0 M
5/30/2019 7:00 AM 0.00 0.0 M 0.0 M
5/31/2019 7:00 AM 0.28 0.0 M 0.0 M
6/1/2019 7:00 AM 0.00 0.0 M 0.0 M
6/2/2019 7:00 AM 0.00 0.0 M 0.0 M
6/3/2019 7:00 AM 0.12 0.0 M 0.0 M
6/4/2019 7:00 AM 0.00 0.0 M 0.0 M
6/5/2019 7:00 AM 0.00 0.0 M 0.0 M
6/6/2019 7:00 AM T 0.0 M 0.0 M
6/7/2019 7:00 AM 0.00 0.0 M 0.0 M
6/8/2019 7:00 AM 0.00 0.0 M 0.0 M
6/12/2019 7:00 AM 0.00 0.0 M 0.0 M
6/13/2019 7:00 AM 0.76 0.0 M 0.0 M Most of this fell in a stratiform rain overnight
6/14/2019 7:00 AM 0.14 0.0 M 0.0 M late afternoon shower with gusty winds
6/15/2019 7:00 AM 0.00 0.0 M 0.0 M
6/16/2019 7:00 AM 0.00 0.0 M 0.0 M
6/17/2019 7:00 AM 0.00 0.0 M 0.0 M
6/18/2019 7:00 AM 0.78 0.0 M 0.0 M
6/19/2019 7:00 AM 0.99 0.0 M 0.0 M
6/20/2019 7:00 AM 0.02 0.0 M 0.0 M
6/21/2019 7:00 AM 0.08 0.0 M 0.0 M
6/22/2019 7:00 AM 0.00 0.0 M 0.0 M
6/23/2019 7:00 AM 0.00 0.0 M 0.0 M
6/24/2019 7:00 AM 0.00 0.0 M 0.0 M
6/25/2019 7:00 AM 0.72 0.0 M 0.0 M
6/26/2019 7:00 AM 0.00 0.0 M 0.0 M
6/27/2019 7:00 AM 0.00 0.0 M 0.0 M
6/28/2019 7:00 AM 0.54 0.0 M 0.0 M Was in the right location of slow moving storms to receive a mostly moderate rainfall rate for a good hour or so.
6/29/2019 7:00 AM 0.01 0.0 M 0.0 M
6/30/2019 7:00 AM 0.04 0.0 M 0.0 M
7/1/2019 7:00 AM 0.00 0.0 M 0.0 M
7/2/2019 7:00 AM 0.00 0.0 M 0.0 M
7/3/2019 7:00 AM 1.33 0.0 M 0.0 M
7/4/2019 7:00 AM 0.00 0.0 M 0.0 M
7/5/2019 7:00 AM 0.17 0.0 M 0.0 M
7/9/2019 7:00 AM 2.68 0.0 M 0.0 M Due to the later than usual observation yesterday, there are possibly several hundredths not included in what would be a true 24 hour ob. Much of this fell between 8:30 & 10:00 AM, part of the larger storm complex that caused widespread flash flooding in the region (but fewer issues in the city of Fairfax). Lighter intermittent showers continued into the afternoon.
7/10/2019 7:00 AM 0.00 0.0 M 0.0 M
7/11/2019 7:00 AM 0.00 0.0 M 0.0 M
7/12/2019 7:00 AM 0.73 0.0 M 0.0 M
7/13/2019 7:00 AM 0.00 0.0 M 0.0 M
7/14/2019 7:00 AM 0.00 0.0 M 0.0 M
7/15/2019 7:00 AM 0.00 0.0 M 0.0 M
7/16/2019 7:00 AM 0.00 0.0 M 0.0 M
7/17/2019 7:00 AM T 0.0 M 0.0 M Evening sprinkles
7/18/2019 7:00 AM 0.40 0.0 M 0.0 M
7/19/2019 7:00 AM 0.00 0.0 M 0.0 M
7/20/2019 7:00 AM 0.00 0.0 M 0.0 M
7/21/2019 7:00 AM 0.00 0.0 M 0.0 M
7/22/2019 7:00 AM 0.27 0.0 M 0.0 M
7/23/2019 9:45 AM 0.38 0.0 M 0.0 M Light rain at time of observation
7/24/2019 7:00 AM 0.02 0.0 M 0.0 M
7/25/2019 7:00 AM 0.18 0.0 M 0.0 M
7/26/2019 7:00 AM 0.00 0.0 M 0.0 M
7/27/2019 7:00 AM 0.00 0.0 M 0.0 M
7/28/2019 7:00 AM 0.00 0.0 M 0.0 M
7/29/2019 7:00 AM 0.00 0.0 M 0.0 M
7/30/2019 7:00 AM 0.00 0.0 M 0.0 M
7/31/2019 7:00 AM 0.00 0.0 M 0.0 M
8/1/2019 7:00 AM 0.02 0.0 M 0.0 M
8/2/2019 7:00 AM 0.00 0.0 M 0.0 M
8/3/2019 7:00 AM 0.00 0.0 M 0.0 M
8/4/2019 7:00 AM 0.11 0.0 M 0.0 M
8/5/2019 7:00 AM 0.00 0.0 M 0.0 M
8/6/2019 7:00 AM 0.00 0.0 M 0.0 M
8/7/2019 7:00 AM 0.00 0.0 M 0.0 M
8/8/2019 7:00 AM 1.29 0.0 M 0.0 M Thunderstorm with heavy rain around 4pm.
8/9/2019 7:00 AM 0.00 0.0 M 0.0 M
8/10/2019 7:00 AM 0.01 0.0 M 0.0 M
8/11/2019 7:00 AM 0.00 0.0 M 0.0 M
8/12/2019 7:00 AM 0.00 0.0 M 0.0 M
8/13/2019 7:00 AM 0.00 0.0 M 0.0 M
8/14/2019 7:00 AM 0.81 0.0 M 0.0 M
8/15/2019 7:00 AM 0.00 0.0 M 0.0 M
8/16/2019 7:00 AM 2.76 0.0 M 0.0 M Was not home to witness storm, but rates were extreme. Mulch washed away that had survived all the heavy rains of 2018.
8/17/2019 7:00 AM 0.00 0.0 M 0.0 M
8/18/2019 7:00 AM 0.00 0.0 M 0.0 M
8/19/2019 7:00 AM 0.00 0.0 M 0.0 M
8/20/2019 7:00 AM 0.56 0.0 M 0.0 M
8/21/2019 7:00 AM 0.52 0.0 M 0.0 M
8/22/2019 7:00 AM T 0.0 M 0.0 M Evidence of some sprinkles
8/23/2019 7:00 AM 0.00 0.0 M 0.0 M
8/24/2019 7:00 AM 0.57 0.0 M 0.0 M
8/25/2019 7:00 AM 0.00 0.0 M 0.0 M
8/26/2019 7:00 AM 0.00 0.0 M 0.0 M
8/27/2019 7:00 AM 0.00 0.0 M 0.0 M
8/28/2019 7:00 AM 0.00 0.0 M 0.0 M Based on regional observations, there may have been sprinkles, but I can't say for sure.
8/29/2019 7:00 AM 0.10 0.0 M 0.0 M
8/30/2019 7:00 AM 0.00 0.0 M 0.0 M
8/31/2019 7:00 AM 0.00 0.0 M 0.0 M
9/1/2019 7:00 AM 0.00 0.0 M 0.0 M
9/2/2019 7:00 AM 0.00 0.0 M 0.0 M
9/3/2019 7:00 AM 0.19 0.0 M 0.0 M
9/4/2019 7:00 AM 0.00 0.0 M 0.0 M
9/5/2019 7:00 AM 0.00 0.0 M 0.0 M
9/6/2019 7:00 AM 0.00 0.0 M 0.0 M
9/7/2019 7:00 AM 0.00 0.0 M 0.0 M
9/8/2019 7:00 AM 0.00 0.0 M 0.0 M
9/9/2019 7:00 AM 0.00 0.0 M 0.0 M
9/10/2019 7:00 AM 0.00 0.0 M 0.0 M
9/11/2019 7:00 AM 0.00 0.0 M 0.0 M
9/12/2019 7:00 AM 0.27 0.0 M 0.0 M Heavy downpour lasted less than an hour around 5pm on the 11th.
9/13/2019 7:00 AM 0.02 0.0 M 0.0 M Light rain / drizzle in the morning
9/14/2019 7:00 AM 0.00 0.0 M 0.0 M
9/15/2019 7:00 AM 0.00 0.0 M 0.0 M
9/16/2019 7:00 AM 0.00 0.0 M 0.0 M
9/17/2019 7:00 AM 0.00 0.0 M 0.0 M
9/18/2019 7:00 AM 0.00 0.0 M 0.0 M
9/19/2019 7:00 AM 0.00 0.0 M 0.0 M
9/20/2019 7:00 AM 0.00 0.0 M 0.0 M
9/21/2019 7:00 AM 0.00 0.0 M 0.0 M
9/22/2019 7:00 AM 0.00 0.0 M 0.0 M
9/23/2019 7:00 AM 0.00 0.0 M 0.0 M
9/24/2019 7:00 AM T 0.0 M 0.0 M Brief sprinkles during the evening.
9/25/2019 7:00 AM 0.00 0.0 M 0.0 M
9/26/2019 7:00 AM 0.00 0.0 M 0.0 M
9/27/2019 7:00 AM T 0.0 M 0.0 M A couple instances of sprinkles
9/28/2019 7:00 AM 0.00 0.0 M 0.0 M
9/29/2019 7:00 AM 0.00 0.0 M 0.0 M
9/30/2019 7:00 AM 0.00 0.0 M 0.0 M



Start Date End Date & Time Duration in Days Precipitation Snow Depth Snow Depth SWE Notes
10/27/2018 10/28/2018 7:00 AM 2 1.34 M M
10/29/2018 10/30/2018 7:00 AM 2 0.03 M M Light shower both days.
12/27/2018 1/01/2019 7:00 AM 6 1.42 0.0 M
2/11/2019 2/12/2019 7:00 AM 2 0.82 M M A light coating of snow fell the evening of 2/10, but had slushed down by the next morning due to freezing rain/rain.
3/9/2019 3/11/2019 7:00 AM 3 0.57 M M Snow was falling the afternoon of the 8th with at least 0.5" accumulation. Couldn't measure final. Precipitation continued at times over the weekend.
4/28/2019 4/30/2019 7:00 AM 3 0.11 M M
6/9/2019 6/11/2019 7:00 AM 3 0.42 M M
7/6/2019 7/08/2019 8:20 AM 3 0.18 M M 0.12 occurred between Friday and Sunday evening. The rest mainly occurred Sunday night, although it was just starting to rain again when the observation was made.



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