Station Overview Station Location
Station Number VA-FX-54 Latitude 38.8646
Station Name Fairfax 4.1 W Longitude -77.3732
County Fairfax Elevation (ft) 438



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 3.48 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Nov 10 3.22 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Dec 10 3.09 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Jan 11 2.87 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Feb 11 2.64 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
March 11 3.53 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
April 11 3.24 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
May 11 4.19 0.26 8 0.26 8 0.00 0 0 3 0 0.0 0 0
June 11 3.92 1.97 30 1.97 30 0.00 0 0 11 0 0.0 0 0
July 11 3.97 2.11 31 2.03 29 0.08 2 1 5 1 0.0 0 0
Aug 11 3.29 3.77 31 3.44 29 0.33 2 1 11 0 0.0 0 0
Sept 11 4.00 12.23 30 12.16 28 0.07 2 1 13 6 0.0 0 0
Water Year Totals: 41.44" 20.34" 130 days 19.86" 124 0.48" 6 days 3 43 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
10/1/2010
10/2/2010
10/3/2010
10/4/2010
10/5/2010
10/6/2010
10/7/2010
10/8/2010
10/9/2010
10/10/2010
10/11/2010
10/12/2010
10/13/2010
10/14/2010
10/15/2010
10/16/2010
10/17/2010
10/18/2010
10/19/2010
10/20/2010
10/21/2010
10/22/2010
10/23/2010
10/24/2010
10/25/2010
10/26/2010
10/27/2010
10/28/2010
10/29/2010
10/30/2010
10/31/2010
11/1/2010
11/2/2010
11/3/2010
11/4/2010
11/5/2010
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
11/17/2010
11/18/2010
11/19/2010
11/20/2010
11/21/2010
11/22/2010
11/23/2010
11/24/2010
11/25/2010
11/26/2010
11/27/2010
11/28/2010
11/29/2010
11/30/2010
12/1/2010
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
12/13/2010
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
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
3/11/2011
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 0.02
5/25/2011 0.15
5/26/2011 0.00
5/27/2011 0.00
5/28/2011 0.09
5/29/2011 0.00
5/30/2011 0.00
5/31/2011 0.00
6/1/2011 0.00
6/2/2011 0.01
6/3/2011 0.00
6/4/2011 0.00
6/5/2011 0.00
6/6/2011 0.00
6/7/2011 0.00
6/8/2011 0.00
6/9/2011 0.00
6/10/2011 0.02
6/11/2011 0.00
6/12/2011 0.01
6/13/2011 0.89
6/14/2011 0.00
6/15/2011 0.00
6/16/2011 0.02
6/17/2011 0.59
6/18/2011 0.00
6/19/2011 0.02
6/20/2011 0.31
6/21/2011 0.03
6/22/2011 0.02
6/23/2011 0.00
6/24/2011 0.00
6/25/2011 0.00
6/26/2011 0.00
6/27/2011 0.05
6/28/2011 0.00
6/29/2011 0.00
6/30/2011 0.00
Day of YearDaily PrcpMultiday Prcp
7/1/2011 0.00
7/2/2011 0.00
7/3/2011 **
7/4/2011 0.08
7/5/2011 T
7/6/2011 0.00
7/7/2011 0.09
7/8/2011 0.00
7/9/2011 0.17
7/10/2011 0.00
7/11/2011 0.00
7/12/2011 0.03
7/13/2011 0.00
7/14/2011 0.26
7/15/2011 0.00
7/16/2011 0.00
7/17/2011 0.00
7/18/2011 0.00
7/19/2011 0.00
7/20/2011 0.00
7/21/2011 0.00
7/22/2011 0.00
7/23/2011 0.00
7/24/2011 0.00
7/25/2011 0.00
7/26/2011 1.48
7/27/2011 0.00
7/28/2011 0.00
7/29/2011 0.00
7/30/2011 0.00
7/31/2011 0.00
8/1/2011 0.00
8/2/2011 0.03
8/3/2011 0.01
8/4/2011 0.06
8/5/2011 0.00
8/6/2011 0.00
8/7/2011 0.55
8/8/2011 0.02
8/9/2011 0.00
8/10/2011 0.00
8/11/2011 0.00
8/12/2011 0.00
8/13/2011 0.00
8/14/2011 **
8/15/2011 0.33
8/16/2011 0.00
8/17/2011 0.00
8/18/2011 0.00
8/19/2011 0.38
8/20/2011 0.30
8/21/2011 0.00
8/22/2011 0.01
8/23/2011 0.00
8/24/2011 0.00
8/25/2011 0.00
8/26/2011 0.38
8/27/2011 0.00
8/28/2011 1.68
8/29/2011 0.02
8/30/2011 0.00
8/31/2011 0.00
9/1/2011 0.00
9/2/2011 T
9/3/2011 0.00
9/4/2011 0.06
9/5/2011 0.04
9/6/2011 1.15
9/7/2011 0.80
9/8/2011 1.35
9/9/2011 6.95
9/10/2011 0.38
9/11/2011 0.00
9/12/2011 0.07
9/13/2011 0.00
9/14/2011 0.00
9/15/2011 0.00
9/16/2011 0.03
9/17/2011 0.00
9/18/2011 T
9/19/2011 0.00
9/20/2011 T
9/21/2011 0.26
9/22/2011 0.14
9/23/2011 T
9/24/2011 0.53
9/25/2011 **
9/26/2011 0.07
9/27/2011 0.00
9/28/2011 T
9/29/2011 0.40
9/30/2011 T



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
5/24/2011 7:00 AM 0.02 0.0 M 0.0 M
5/25/2011 7:00 AM 0.15 0.0 M 0.0 M About 0.02" fell during morning shower around 8-9am, remainder during evening shower around 11-12pm.
5/26/2011 7:00 AM 0.00 0.0 M 0.0 M
5/27/2011 7:00 AM 0.00 0.0 M 0.0 M
5/28/2011 7:00 AM 0.09 0.0 M 0.0 M
5/29/2011 7:00 AM 0.00 0.0 M 0.0 M
5/30/2011 7:00 AM 0.00 0.0 M 0.0 M
5/31/2011 7:00 AM 0.00 0.0 M 0.0 M
6/1/2011 7:00 AM 0.00 0.0 M 0.0 M
6/2/2011 7:00 AM 0.01 0.0 M 0.0 M
6/3/2011 7:00 AM 0.00 0.0 M 0.0 M
6/4/2011 7:00 AM 0.00 0.0 M 0.0 M
6/5/2011 7:00 AM 0.00 0.0 M 0.0 M
6/6/2011 7:00 AM 0.00 0.0 M 0.0 M
6/7/2011 7:00 AM 0.00 0.0 M 0.0 M
6/8/2011 7:00 AM 0.00 0.0 M 0.0 M
6/9/2011 7:00 AM 0.00 0.0 M 0.0 M
6/10/2011 7:00 AM 0.02 0.0 M 0.0 M
6/11/2011 7:00 AM 0.00 0.0 M 0.0 M
6/12/2011 7:00 AM 0.01 0.0 M 0.0 M
6/13/2011 7:00 AM 0.89 0.0 M 0.0 M
6/14/2011 7:00 AM 0.00 0.0 M 0.0 M
6/15/2011 7:00 AM 0.00 0.0 M 0.0 M
6/16/2011 7:00 AM 0.02 0.0 M 0.0 M
6/17/2011 7:00 AM 0.59 0.0 M 0.0 M Thunderstorms from 10pm through midnight
6/18/2011 7:00 AM 0.00 0.0 M 0.0 M Just missed multiple thunderstorms in the evening
6/19/2011 7:00 AM 0.02 0.0 M 0.0 M Shower right at observation time
6/20/2011 7:00 AM 0.31 0.0 M 0.0 M Rain overnight, ended before observation time
6/21/2011 7:00 AM 0.03 0.0 M 0.0 M
6/22/2011 7:00 AM 0.02 0.0 M 0.0 M
6/23/2011 7:00 AM 0.00 0.0 M 0.0 M
6/24/2011 7:00 AM 0.00 0.0 M 0.0 M
6/25/2011 7:00 AM 0.00 0.0 M 0.0 M
6/26/2011 7:00 AM 0.00 0.0 M 0.0 M
6/27/2011 7:00 AM 0.05 0.0 M 0.0 M
6/28/2011 7:00 AM 0.00 0.0 M 0.0 M
6/29/2011 7:00 AM 0.00 0.0 M 0.0 M
6/30/2011 7:00 AM 0.00 0.0 M 0.0 M
7/1/2011 7:00 AM 0.00 0.0 M 0.0 M
7/2/2011 7:00 AM 0.00 0.0 M 0.0 M
7/5/2011 7:00 AM T 0.0 M 0.0 M
7/6/2011 7:00 AM 0.00 0.0 M 0.0 M
7/7/2011 7:00 AM 0.09 0.0 M 0.0 M
7/8/2011 7:00 AM 0.00 0.0 M 0.0 M
7/9/2011 7:00 AM 0.17 0.0 M 0.0 M
7/10/2011 7:00 AM 0.00 0.0 M 0.0 M
7/11/2011 7:00 AM 0.00 0.0 M 0.0 M
7/12/2011 7:00 AM 0.03 0.0 M 0.0 M
7/13/2011 7:00 AM 0.00 0.0 M 0.0 M
7/14/2011 7:00 AM 0.26 0.0 M 0.0 M Very heavy rain from thunderstorm around 4PM.
7/15/2011 7:00 AM 0.00 0.0 M M M
7/16/2011 7:00 AM 0.00 0.0 M M M
7/17/2011 7:00 AM 0.00 0.0 M M M
7/18/2011 7:00 AM 0.00 0.0 M M M
7/19/2011 7:00 AM 0.00 0.0 M M M
7/20/2011 7:00 AM 0.00 0.0 M M M
7/21/2011 7:00 AM 0.00 0.0 M M M
7/22/2011 7:00 AM 0.00 0.0 M M M
7/23/2011 7:00 AM 0.00 0.0 M M M
7/24/2011 7:00 AM 0.00 0.0 M M M
7/25/2011 7:00 AM 0.00 0.0 M M M
7/26/2011 7:00 AM 1.48 0.0 M 0.0 M Heavy rain from thunderstorms in the early afternoon
7/27/2011 7:00 AM 0.00 0.0 M 0.0 M
7/28/2011 7:00 AM 0.00 0.0 M 0.0 M
7/29/2011 7:00 AM 0.00 0.0 M 0.0 M
7/30/2011 7:00 AM 0.00 0.0 M 0.0 M
7/31/2011 7:00 AM 0.00 0.0 M 0.0 M
8/1/2011 7:00 AM 0.00 0.0 M 0.0 M
8/2/2011 7:00 AM 0.03 0.0 M 0.0 M
8/3/2011 7:00 AM 0.01 0.0 M 0.0 M Light showers at observation time.
8/4/2011 7:00 AM 0.06 0.0 M 0.0 M
8/5/2011 7:00 AM 0.00 0.0 M 0.0 M
8/6/2011 7:00 AM 0.00 0.0 M 0.0 M
8/7/2011 7:00 AM 0.55 0.0 M 0.0 M 3 separate storms, heaviest around 4:30 with 0.37" in 15 minutes or so
8/8/2011 7:00 AM 0.02 0.0 M 0.0 M
8/9/2011 7:00 AM 0.00 0.0 M 0.0 M
8/10/2011 7:00 AM 0.00 0.0 M 0.0 M
8/11/2011 7:00 AM 0.00 0.0 M 0.0 M
8/12/2011 7:00 AM 0.00 0.0 M 0.0 M
8/13/2011 7:00 AM 0.00 0.0 M 0.0 M
8/16/2011 7:00 AM 0.00 0.0 M 0.0 M
8/17/2011 7:00 AM 0.00 0.0 M 0.0 M
8/18/2011 7:00 AM 0.00 0.0 M 0.0 M
8/19/2011 7:00 AM 0.38 0.0 M 0.0 M Thunderstorms in the vicinity from about 5pm through at least midnight, most of the storms stayed to the west and southwest.
8/20/2011 7:00 AM 0.30 0.0 M 0.0 M Thunderstorm from 730-750PM
8/21/2011 7:00 AM 0.00 0.0 M 0.0 M
8/22/2011 7:00 AM 0.01 0.0 M 0.0 M
8/23/2011 7:00 AM 0.00 0.0 M 0.0 M
8/24/2011 7:00 AM 0.00 0.0 M 0.0 M
8/25/2011 7:00 AM 0.00 0.0 M 0.0 M
8/26/2011 7:00 AM 0.38 0.0 M 0.0 M
8/27/2011 7:00 AM 0.00 0.0 M 0.0 M
8/28/2011 7:00 AM 1.68 0.0 M 0.0 M Hurricane Irene
8/29/2011 7:00 AM 0.02 0.0 M 0.0 M Last bands of light rain from Irene came through from 7AM-9AM 8/28
8/30/2011 7:00 AM 0.00 0.0 M 0.0 M
8/31/2011 7:00 AM 0.00 0.0 M 0.0 M
9/1/2011 7:00 AM 0.00 0.0 M 0.0 M
9/2/2011 7:00 AM T 0.0 M 0.0 M
9/3/2011 7:00 AM 0.00 0.0 M 0.0 M
9/4/2011 7:00 AM 0.06 0.0 M 0.0 M Thunderstorm around 11AM
9/5/2011 7:00 AM 0.04 0.0 M 0.0 M
9/6/2011 7:00 AM 1.15 0.0 M 0.0 M Heavy rain from 9PM-12AM, the heaviest stayed just west.
9/7/2011 7:00 AM 0.80 0.0 M 0.0 M
9/8/2011 7:00 AM 1.35 0.0 M 0.0 M Storm total of 3.30" since 9/5.
9/9/2011 7:00 AM 6.95 0.0 M 0.0 M Heavy rain, flooding, storm total of 10.25" now.
9/10/2011 7:00 AM 0.38 0.0 M 0.0 M Early morning showers Friday, sun finally shining Saturday morning.
9/11/2011 7:00 AM 0.00 0.0 M 0.0 M
9/12/2011 7:00 AM 0.07 0.0 M 0.0 M
9/13/2011 7:00 AM 0.00 0.0 M 0.0 M
9/14/2011 7:00 AM 0.00 0.0 M 0.0 M
9/15/2011 7:00 AM 0.00 0.0 M 0.0 M
9/16/2011 7:00 AM 0.03 0.0 M 0.0 M
9/17/2011 7:00 AM 0.00 0.0 M 0.0 M
9/18/2011 7:00 AM T 0.0 M 0.0 M
9/19/2011 7:00 AM 0.00 0.0 M 0.0 M
9/20/2011 7:00 AM T 0.0 M 0.0 M
9/21/2011 7:00 AM 0.26 0.0 M 0.0 M
9/22/2011 7:00 AM 0.14 0.0 M 0.0 M
9/23/2011 7:00 AM T 0.0 M 0.0 M
9/24/2011 7:00 AM 0.53 0.0 M 0.0 M
9/27/2011 7:00 AM 0.00 0.0 M 0.0 M
9/28/2011 7:00 AM T 0.0 M 0.0 M Storm started right at observation time.
9/29/2011 7:00 AM 0.40 0.0 M 0.0 M
9/30/2011 7:00 AM T 0.0 M 0.0 M



Start Date End Date & Time Duration in Days Precipitation Snow Depth Snow Depth SWE Notes
7/3/2011 7/04/2011 7:00 PM 2 0.08 0.0 0.00
8/14/2011 8/15/2011 7:00 AM 2 0.33 0.0 0.00
9/25/2011 9/26/2011 7:00 AM 2 0.07 M M



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