Station Overview Station Location
Station Number MD-MG-68 Latitude 39.1205
Station Name Gaithersburg 2.5 SW Longitude -77.254
County Montgomery Elevation (ft) 403



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 11 3.43 5.36 31 5.36 31 0.00 0 0 13 0 0.8 1 1
Nov 11 3.52 2.83 30 2.83 30 0.00 0 0 8 0 0.0 0 0
Dec 11 3.12 4.24 31 4.24 31 0.00 0 0 8 0 0.0 0 0
Jan 12 2.82 2.00 31 2.00 31 0.00 0 0 12 1 1.4 2 2
Feb 12 2.72 0.92 29 0.92 29 0.00 0 0 8 1 2.1 4 2
March 12 3.68 2.93 31 2.93 31 0.00 0 0 9 0 0.0 0 0
April 12 3.32 1.96 30 1.96 30 0.00 0 0 7 0 0.0 0 0
May 12 4.30 4.66 31 4.66 31 0.00 0 0 13 0 0.0 0 0
June 12 3.79 2.49 30 2.49 30 0.00 0 0 8 0 0.0 0 0
July 12 3.85 3.75 31 3.75 31 0.00 0 0 11 0 0.0 0 0
Aug 12 3.20 5.29 31 5.29 31 0.00 0 0 14 0 0.0 0 0
Sept 12 4.00 2.40 30 2.40 30 0.00 0 0 9 0 0.0 0 0
Water Year Totals: 41.75" 38.83" 366 days 38.83" 366 0.00" 0 days 0 120 days 2 days 4.3" 7 days 5 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
10/1/2011 0.00
10/2/2011 1.06
10/3/2011 0.05
10/4/2011 0.05
10/5/2011 0.00
10/6/2011 0.00
10/7/2011 0.00
10/8/2011 0.00
10/9/2011 0.00
10/10/2011 0.00
10/11/2011 0.00
10/12/2011 0.02
10/13/2011 0.41
10/14/2011 1.25
10/15/2011 0.42
10/16/2011 0.00
10/17/2011 0.00
10/18/2011 0.00
10/19/2011 0.49
10/20/2011 0.27
10/21/2011 0.00
10/22/2011 0.00
10/23/2011 0.00
10/24/2011 0.00
10/25/2011 0.00
10/26/2011 0.00
10/27/2011 0.11
10/28/2011 0.18
10/29/2011 0.42
10/30/2011 0.63
10/31/2011 0.00
11/1/2011 0.00
11/2/2011 0.00
11/3/2011 0.00
11/4/2011 0.00
11/5/2011 0.00
11/6/2011 0.00
11/7/2011 0.00
11/8/2011 0.00
11/9/2011 0.00
11/10/2011 0.00
11/11/2011 0.08
11/12/2011 0.00
11/13/2011 0.00
11/14/2011 0.00
11/15/2011 0.00
11/16/2011 0.16
11/17/2011 0.37
11/18/2011 0.00
11/19/2011 0.00
11/20/2011 0.00
11/21/2011 0.14
11/22/2011 0.16
11/23/2011 1.36
11/24/2011 0.00
11/25/2011 0.00
11/26/2011 0.00
11/27/2011 0.00
11/28/2011 0.00
11/29/2011 0.02
11/30/2011 0.54
12/1/2011 0.00
12/2/2011 0.00
12/3/2011 0.00
12/4/2011 0.00
12/5/2011 0.00
12/6/2011 0.03
12/7/2011 0.41
12/8/2011 1.70
12/9/2011 0.00
12/10/2011 0.00
12/11/2011 0.00
12/12/2011 0.00
12/13/2011 0.00
12/14/2011 0.00
12/15/2011 0.00
12/16/2011 0.04
12/17/2011 0.00
12/18/2011 0.00
12/19/2011 0.00
12/20/2011 0.00
12/21/2011 0.00
12/22/2011 0.10
12/23/2011 1.24
12/24/2011 0.00
12/25/2011 0.00
12/26/2011 0.00
12/27/2011 0.00
12/28/2011 0.68
12/29/2011 0.00
12/30/2011 0.00
12/31/2011 0.04
Day of YearDaily PrcpMultiday Prcp
1/1/2012 0.00
1/2/2012 0.04
1/3/2012 0.00
1/4/2012 T
1/5/2012 0.00
1/6/2012 0.00
1/7/2012 0.00
1/8/2012 0.00
1/9/2012 0.00
1/10/2012 0.04
1/11/2012 0.00
1/12/2012 1.08
1/13/2012 0.12
1/14/2012 0.00
1/15/2012 0.00
1/16/2012 0.00
1/17/2012 0.07
1/18/2012 0.11
1/19/2012 0.00
1/20/2012 0.00
1/21/2012 0.26
1/22/2012 0.00
1/23/2012 0.01
1/24/2012 0.04
1/25/2012 0.00
1/26/2012 0.00
1/27/2012 0.04
1/28/2012 0.18
1/29/2012 0.00
1/30/2012 0.01
1/31/2012 0.00
2/1/2012 0.00
2/2/2012 0.01
2/3/2012 0.04
2/4/2012 0.00
2/5/2012 0.19
2/6/2012 0.00
2/7/2012 0.00
2/8/2012 0.00
2/9/2012 0.14
2/10/2012 0.00
2/11/2012 0.22
2/12/2012 0.02
2/13/2012 0.00
2/14/2012 0.00
2/15/2012 0.00
2/16/2012 0.00
2/17/2012 0.21
2/18/2012 0.00
2/19/2012 0.00
2/20/2012 0.00
2/21/2012 0.00
2/22/2012 0.00
2/23/2012 0.00
2/24/2012 T
2/25/2012 0.09
2/26/2012 0.00
2/27/2012 0.00
2/28/2012 0.00
2/29/2012 0.00
3/1/2012 1.62
3/2/2012 0.00
3/3/2012 0.58
3/4/2012 0.03
3/5/2012 0.00
3/6/2012 0.00
3/7/2012 0.00
3/8/2012 0.00
3/9/2012 0.04
3/10/2012 0.00
3/11/2012 0.00
3/12/2012 0.00
3/13/2012 0.01
3/14/2012 0.00
3/15/2012 0.00
3/16/2012 0.00
3/17/2012 0.00
3/18/2012 0.00
3/19/2012 0.00
3/20/2012 0.07
3/21/2012 0.00
3/22/2012 0.00
3/23/2012 0.00
3/24/2012 0.00
3/25/2012 0.53
3/26/2012 0.01
3/27/2012 0.00
3/28/2012 0.00
3/29/2012 0.04
3/30/2012 0.00
3/31/2012 0.00
Day of YearDaily PrcpMultiday Prcp
4/1/2012 0.00
4/2/2012 0.12
4/3/2012 0.00
4/4/2012 0.00
4/5/2012 0.00
4/6/2012 0.00
4/7/2012 0.00
4/8/2012 0.00
4/9/2012 0.00
4/10/2012 0.00
4/11/2012 0.00
4/12/2012 0.00
4/13/2012 0.00
4/14/2012 0.00
4/15/2012 0.00
4/16/2012 0.00
4/17/2012 0.00
4/18/2012 0.00
4/19/2012 0.30
4/20/2012 0.00
4/21/2012 0.00
4/22/2012 0.09
4/23/2012 1.01
4/24/2012 0.10
4/25/2012 0.00
4/26/2012 0.00
4/27/2012 0.14
4/28/2012 0.00
4/29/2012 0.20
4/30/2012 0.00
5/1/2012 0.06
5/2/2012 0.05
5/3/2012 0.00
5/4/2012 0.00
5/5/2012 0.00
5/6/2012 0.00
5/7/2012 0.00
5/8/2012 0.00
5/9/2012 0.39
5/10/2012 0.49
5/11/2012 0.00
5/12/2012 0.00
5/13/2012 0.00
5/14/2012 0.03
5/15/2012 1.54
5/16/2012 0.00
5/17/2012 0.00
5/18/2012 0.00
5/19/2012 0.00
5/20/2012 0.00
5/21/2012 0.06
5/22/2012 0.60
5/23/2012 0.04
5/24/2012 0.13
5/25/2012 0.02
5/26/2012 0.00
5/27/2012 0.00
5/28/2012 0.13
5/29/2012 0.00
5/30/2012 1.12
5/31/2012 0.00
6/1/2012 0.00
6/2/2012 1.09
6/3/2012 0.00
6/4/2012 0.02
6/5/2012 0.00
6/6/2012 0.00
6/7/2012 0.00
6/8/2012 0.00
6/9/2012 0.00
6/10/2012 0.00
6/11/2012 0.00
6/12/2012 0.03
6/13/2012 0.56
6/14/2012 0.00
6/15/2012 0.00
6/16/2012 0.00
6/17/2012 0.00
6/18/2012 0.06
6/19/2012 0.07
6/20/2012 0.00
6/21/2012 0.00
6/22/2012 0.00
6/23/2012 0.15
6/24/2012 0.00
6/25/2012 0.00
6/26/2012 0.00
6/27/2012 0.00
6/28/2012 0.00
6/29/2012 0.00
6/30/2012 0.51
Day of YearDaily PrcpMultiday Prcp
7/1/2012 0.00
7/2/2012 0.00
7/3/2012 0.00
7/4/2012 0.15
7/5/2012 0.00
7/6/2012 0.00
7/7/2012 0.00
7/8/2012 0.00
7/9/2012 0.21
7/10/2012 0.05
7/11/2012 0.00
7/12/2012 0.00
7/13/2012 0.00
7/14/2012 1.39
7/15/2012 0.00
7/16/2012 0.06
7/17/2012 0.08
7/18/2012 0.00
7/19/2012 0.00
7/20/2012 1.23
7/21/2012 0.35
7/22/2012 0.20
7/23/2012 0.00
7/24/2012 0.00
7/25/2012 0.02
7/26/2012 0.00
7/27/2012 0.01
7/28/2012 0.00
7/29/2012 0.00
7/30/2012 0.00
7/31/2012 0.00
8/1/2012 0.03
8/2/2012 0.00
8/3/2012 0.00
8/4/2012 0.00
8/5/2012 0.00
8/6/2012 0.26
8/7/2012 0.01
8/8/2012 0.00
8/9/2012 0.47
8/10/2012 1.07
8/11/2012 0.15
8/12/2012 0.00
8/13/2012 0.00
8/14/2012 0.05
8/15/2012 0.00
8/16/2012 0.00
8/17/2012 0.00
8/18/2012 0.06
8/19/2012 0.00
8/20/2012 0.58
8/21/2012 0.23
8/22/2012 0.00
8/23/2012 1.12
8/24/2012 0.00
8/25/2012 0.00
8/26/2012 0.00
8/27/2012 1.19
8/28/2012 0.06
8/29/2012 0.01
8/30/2012 0.00
8/31/2012 0.00
9/1/2012 0.00
9/2/2012 0.00
9/3/2012 0.04
9/4/2012 0.02
9/5/2012 0.00
9/6/2012 0.00
9/7/2012 0.02
9/8/2012 0.00
9/9/2012 0.57
9/10/2012 0.00
9/11/2012 0.00
9/12/2012 0.00
9/13/2012 0.00
9/14/2012 0.00
9/15/2012 0.00
9/16/2012 0.00
9/17/2012 0.00
9/18/2012 0.21
9/19/2012 0.90
9/20/2012 0.00
9/21/2012 0.00
9/22/2012 0.00
9/23/2012 0.00
9/24/2012 0.00
9/25/2012 0.00
9/26/2012 0.09
9/27/2012 0.00
9/28/2012 0.53
9/29/2012 0.02
9/30/2012 0.00



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
10/1/2011 7:00 AM 0.00 0.0 M M M
10/2/2011 7:00 AM 1.06 M M M M
10/3/2011 7:00 AM 0.05 M M M M
10/4/2011 7:00 AM 0.05 M M M M
10/5/2011 7:00 AM 0.00 0.0 M M M
10/6/2011 7:00 AM 0.00 0.0 M M M
10/7/2011 7:00 AM 0.00 0.0 M M M
10/8/2011 7:00 AM 0.00 0.0 M M M
10/9/2011 7:00 AM 0.00 0.0 M M M
10/10/2011 7:00 AM 0.00 0.0 M M M
10/11/2011 7:00 AM 0.00 0.0 M M M
10/12/2011 7:00 AM 0.02 M M M M
10/13/2011 7:00 AM 0.41 M M M M Just missed heavy thunderstorm to our south at 5:00 AM this morning, plenty of loud thunder though. Most of this rain fell at -RA off an on from the afternoon and overnight. No thunder until this morning though the gage received only a few hundredths in a glancing blow from the thunderstorm.
10/14/2011 7:00 AM 1.25 M M M M Just north of a warm front meant drizzle and light rain much of the day until the boundary lifted north. Thunderstorms from the SW arrived just before 6 PM. TSRA and +TSRA from 6-630 PM EDT, which probably accounted for 1-1.1 inch of the total (eyeballing the gage before/after the downpour)
10/15/2011 7:00 AM 0.42 M M M M
10/16/2011 7:00 AM 0.00 0.0 M M M
10/17/2011 7:00 AM 0.00 0.0 M M M
10/18/2011 7:00 AM 0.00 0.0 M M M
10/19/2011 7:00 AM 0.49 M M M M
10/20/2011 7:00 AM 0.27 M M M M
10/21/2011 7:00 AM 0.00 0.0 M M M
10/22/2011 7:00 AM 0.00 0.0 M M M
10/23/2011 7:00 AM 0.00 0.0 M M M
10/24/2011 7:00 AM 0.00 0.0 M M M
10/25/2011 7:00 AM 0.00 0.0 M M M
10/26/2011 7:00 AM 0.00 0.0 M M M
10/27/2011 7:00 AM 0.11 M M M M -RA at the time of the observation
10/28/2011 7:00 AM 0.18 M M M M
10/29/2011 7:00 AM 0.42 T M M M Nearly all of this fell as rain. Temp never fell below 36 degrees. There was a trace/dusting of snow on the ground at 7 AM and -RA was falling at the time of the observation
10/30/2011 7:00 AM 0.63 0.8 M 0.5 M The majority of this fell as snow. Prior to 12:30 PM EDT it was light rain, and rain mixed with mostly melted snow (slush, similar to sleet). After 12:30 it was all snow comprised of aggregates that at times were sizable. Ground was far too warm for any significant accumulations, our elevated deck was the best place to measure the total snow depth. Grass had 1/2" at 7 AM.
10/31/2011 7:00 AM 0.00 0.0 M 0.0 M
11/1/2011 7:00 AM 0.00 0.0 M M M
11/2/2011 7:00 AM 0.00 0.0 M M M
11/3/2011 7:00 AM 0.00 0.0 M M M
11/4/2011 7:00 AM 0.00 0.0 M M M
11/5/2011 7:00 AM 0.00 0.0 M M M
11/6/2011 7:00 AM 0.00 0.0 M M M
11/7/2011 7:00 AM 0.00 0.0 M M M
11/8/2011 7:00 AM 0.00 0.0 M M M
11/9/2011 7:00 AM 0.00 0.0 M M M
11/10/2011 7:00 AM 0.00 0.0 M M M
11/11/2011 7:00 AM 0.08 M M M M -RA and drizzle middle of the day.
11/12/2011 7:00 AM 0.00 0.0 M M M
11/13/2011 7:00 AM 0.00 0.0 M M M
11/14/2011 7:00 AM 0.00 0.0 M M M
11/15/2011 7:00 AM 0.00 0.0 M M M
11/16/2011 7:00 AM 0.16 M M M M
11/17/2011 7:00 AM 0.37 M M M M
11/18/2011 7:00 AM 0.00 0.0 M M M
11/19/2011 7:00 AM 0.00 0.0 M M M
11/20/2011 7:00 AM 0.00 0.0 M M M
11/21/2011 7:00 AM 0.14 M M M M
11/22/2011 7:00 AM 0.16 M M M M
11/23/2011 7:00 AM 1.36 M M M M
11/24/2011 7:00 AM 0.00 0.0 M M M
11/25/2011 7:00 AM 0.00 0.0 M M M
11/26/2011 7:00 AM 0.00 0.0 M M M
11/27/2011 7:00 AM 0.00 0.0 M M M
11/28/2011 7:00 AM 0.00 0.0 M M M
11/29/2011 7:00 AM 0.02 M M M M
11/30/2011 7:00 AM 0.54 M M M M
12/1/2011 7:00 AM 0.00 0.0 M M M
12/2/2011 7:00 AM 0.00 0.0 M M M
12/3/2011 7:00 AM 0.00 0.0 M M M
12/4/2011 7:00 AM 0.00 0.0 M M M
12/5/2011 7:00 AM 0.00 0.0 M M M
12/6/2011 7:00 AM 0.03 M M M M
12/7/2011 7:00 AM 0.41 M M M M
12/8/2011 7:00 AM 1.70 M M M M Storm total 2.11, snow flakes in air as precip ended around 10 pm
12/9/2011 7:00 AM 0.00 0.0 M M M
12/10/2011 7:00 AM 0.00 0.0 M M M
12/11/2011 7:00 AM 0.00 0.0 M M M
12/12/2011 7:00 AM 0.00 0.0 M M M
12/13/2011 7:00 AM 0.00 0.0 M M M
12/14/2011 7:00 AM 0.00 0.0 M M M
12/15/2011 7:00 AM 0.00 0.0 M M M
12/16/2011 7:00 AM 0.04 M M M M
12/17/2011 7:00 AM 0.00 0.0 M M M
12/18/2011 7:00 AM 0.00 0.0 M M M
12/19/2011 7:00 AM 0.00 0.0 M M M
12/20/2011 7:00 AM 0.00 0.0 M M M
12/21/2011 7:00 AM 0.00 0.0 M M M
12/22/2011 7:00 AM 0.10 M M M M
12/23/2011 7:00 AM 1.24 M M M M
12/24/2011 7:00 AM 0.00 0.0 M M M
12/25/2011 7:00 AM 0.00 0.0 M M M
12/26/2011 7:00 AM 0.00 0.0 M M M
12/27/2011 7:00 AM 0.00 0.0 M M M
12/28/2011 7:00 AM 0.68 M M M M
12/29/2011 7:00 AM 0.00 0.0 M M M
12/30/2011 7:00 AM 0.00 0.0 M M M
12/31/2011 7:00 AM 0.04 T M 0.0 0.00 This fell as snow mid-day, enough to wet the streets. Briefly accumulated on dirt surfaces but melted within an hour after it fell--ground and air too warm.
1/1/2012 7:00 AM 0.00 0.0 M M M
1/2/2012 7:00 AM 0.04 M M M M -RA and drizzle
1/3/2012 7:00 AM 0.00 0.0 M M M
1/4/2012 7:00 AM T T T 0.0 0.00 -SN showers part of the afternoon left a dusting in parts of the yard. Snow was very fluffy as surface temps were in the low 20s.
1/5/2012 7:00 AM 0.00 0.0 M M M
1/6/2012 7:00 AM 0.00 0.0 M M M
1/7/2012 7:00 AM 0.00 0.0 M M M
1/8/2012 7:00 AM 0.00 0.0 M M M
1/9/2012 7:00 AM 0.00 0.0 M M M
1/10/2012 7:00 AM 0.04 0.2 M T M Snow mid afternoon.
1/11/2012 7:00 AM 0.00 0.0 M M M
1/12/2012 7:00 AM 1.08 M M M M
1/13/2012 7:00 AM 0.12 M M M M All fell as rain as far as I can tell
1/14/2012 7:00 AM 0.00 0.0 M M M
1/15/2012 7:00 AM 0.00 0.0 M M M
1/16/2012 7:00 AM 0.00 0.0 M M M
1/17/2012 7:00 AM 0.07 M M M M -RA at time of observation
1/18/2012 7:00 AM 0.11 M M M M
1/19/2012 7:00 AM 0.00 0.0 M M M
1/20/2012 7:00 AM 0.00 0.0 M M M
1/21/2012 7:00 AM 0.26 1.2 M 1.2 M There was 1.2" of snow with a hard and brittle frozen crust on top. Snow pellets were in the mixture. Some freezing rain/rain makes up part of the 0.26 although I don't think it was more than a few hundredths. Vast majority fell as snow or as snow pellets.
1/22/2012 7:00 AM 0.00 0.0 M 1.0 M
1/23/2012 7:00 AM 0.01 M M M M Drizzle
1/24/2012 7:00 AM 0.04 M M M M -SHRA during day
1/25/2012 7:00 AM 0.00 0.0 M M M
1/26/2012 7:00 AM 0.00 0.0 M M M
1/27/2012 7:00 AM 0.04 M M M M
1/28/2012 7:00 AM 0.18 M M M M
1/29/2012 7:00 AM 0.00 0.0 M M M
1/30/2012 7:00 AM 0.01 T M T M Snow squall came through around 11 PM, quick shot of wet snow, dusting everything.
1/31/2012 7:00 AM 0.00 0.0 M M M
2/1/2012 7:00 AM 0.00 0.0 M M M
2/2/2012 7:00 AM 0.01 M M M M
2/3/2012 7:00 AM 0.04 M M M M
2/4/2012 7:00 AM 0.00 0.0 M M M
2/5/2012 7:00 AM 0.19 0.4 M 0.0 0.00 0.09 of this fell as rain. 0.10 fell as snow which melted as it made contact. I measured the deepest accumulation shortly before the snow ended. By 7 AM all snow was melted.
2/6/2012 7:00 AM 0.00 0.0 M M M
2/7/2012 7:00 AM 0.00 0.0 M M M
2/8/2012 7:00 AM 0.00 0.0 M M M
2/9/2012 7:00 AM 0.14 0.4 M 0.4 M This feel almost entire as snow. Rain/snow mix started around 1 PM, and was showery and light. Just before 3 PM, precipitation picked up and it changed over to snow. Not sure it was ever classified as "moderate" but at it's heaviest it was close to moderate. Temps too warm for much accumulation.
2/10/2012 7:00 AM 0.00 0.0 M M M
2/11/2012 7:00 AM 0.22 0.9 M 0.9 M All snow, very wet snow. Above freezing throughout event.
2/12/2012 7:00 AM 0.02 0.4 M T M this was all snow once again. When the cold front arrived, a quick shot of SN and gusts over 30 mph quickly accumulated 3/8". My gauge definitely undercaught this one, though it was pretty fluffy snow compared to early morning hours snow. This snow also melted quite a bit after it fell prior to the 7 AM observation, resulting in just a trace on the grass.
2/13/2012 7:00 AM 0.00 0.0 M M M
2/14/2012 7:00 AM 0.00 0.0 M M M
2/15/2012 7:00 AM 0.00 0.0 M M M
2/16/2012 7:00 AM 0.00 0.0 M M M
2/17/2012 7:00 AM 0.21 M M M M
2/18/2012 7:00 AM 0.00 0.0 M M M
2/19/2012 7:00 AM 0.00 0.0 M M M
2/20/2012 7:00 AM 0.00 0.0 M M M
2/21/2012 7:00 AM 0.00 0.0 M M M
2/22/2012 7:00 AM 0.00 0.0 M M M
2/23/2012 7:00 AM 0.00 0.0 M M M
2/24/2012 7:00 AM T M M M M
2/25/2012 7:00 AM 0.09 M M M M
2/26/2012 7:00 AM 0.00 0.0 M M M
2/27/2012 7:00 AM 0.00 0.0 M M M
2/28/2012 7:00 AM 0.00 0.0 M M M
2/29/2012 7:00 AM 0.00 0.0 M M M
3/1/2012 7:00 AM 1.62 M M M M
3/2/2012 7:00 AM 0.00 0.0 M M M
3/3/2012 7:00 AM 0.58 M M M M
3/4/2012 7:00 AM 0.03 M M M M
3/5/2012 7:00 AM 0.00 0.0 M M M
3/6/2012 7:00 AM 0.00 0.0 M M M
3/7/2012 7:00 AM 0.00 0.0 M M M
3/8/2012 7:00 AM 0.00 0.0 M M M
3/9/2012 7:00 AM 0.04 M M M M
3/10/2012 7:00 AM 0.00 0.0 M M M
3/11/2012 7:00 AM 0.00 0.0 M M M
3/12/2012 7:00 AM 0.00 0.0 M M M
3/13/2012 7:00 AM 0.01 M M M M
3/14/2012 7:00 AM 0.00 0.0 M M M
3/15/2012 7:00 AM 0.00 0.0 M M M
3/16/2012 7:00 AM 0.00 0.0 M M M
3/17/2012 7:00 AM 0.00 0.0 M M M
3/18/2012 7:00 AM 0.00 0.0 M M M
3/19/2012 7:00 AM 0.00 0.0 M M M
3/20/2012 7:00 AM 0.07 M M M M
3/21/2012 7:00 AM 0.00 0.0 M M M
3/22/2012 7:00 AM 0.00 0.0 M M M
3/23/2012 7:00 AM 0.00 0.0 M M M
3/24/2012 7:00 AM 0.00 0.0 M M M
3/25/2012 7:00 AM 0.53 M M M M
3/26/2012 7:00 AM 0.01 M M M M
3/27/2012 7:00 AM 0.00 0.0 M M M
3/28/2012 7:00 AM 0.00 0.0 M M M
3/29/2012 7:00 AM 0.04 M M M M
3/30/2012 7:00 AM 0.00 0.0 M M M
3/31/2012 7:00 AM 0.00 0.0 M M M
4/1/2012 7:00 AM 0.00 0.0 M M M
4/2/2012 7:00 AM 0.12 M M M M
4/3/2012 7:00 AM 0.00 0.0 M M M
4/4/2012 7:00 AM 0.00 0.0 M M M
4/5/2012 7:00 AM 0.00 0.0 M M M
4/6/2012 7:00 AM 0.00 0.0 M M M
4/7/2012 7:00 AM 0.00 0.0 M M M
4/8/2012 7:00 AM 0.00 0.0 M M M
4/9/2012 7:00 AM 0.00 0.0 M M M
4/10/2012 7:00 AM 0.00 0.0 M M M
4/11/2012 7:00 AM 0.00 0.0 M M M
4/12/2012 7:00 AM 0.00 0.0 M M M
4/13/2012 7:00 AM 0.00 0.0 M M M
4/14/2012 7:00 AM 0.00 0.0 M M M
4/15/2012 7:00 AM 0.00 0.0 M M M
4/16/2012 7:00 AM 0.00 0.0 M M M
4/17/2012 7:00 AM 0.00 0.0 M M M
4/18/2012 7:00 AM 0.00 0.0 M M M
4/19/2012 7:00 AM 0.30 M M M M
4/20/2012 7:00 AM 0.00 0.0 M M M
4/21/2012 7:00 AM 0.00 0.0 M M M
4/22/2012 7:00 AM 0.09 M M M M
4/23/2012 7:00 AM 1.01 M M M M -SHRA at time of observation
4/24/2012 7:00 AM 0.10 M M M M
4/25/2012 7:00 AM 0.00 0.0 M M M
4/26/2012 7:00 AM 0.00 0.0 M M M
4/27/2012 7:00 AM 0.14 M M M M 0.06 fell during the day on the 26th, then another 0.08 fell around midnight
4/28/2012 7:00 AM 0.00 0.0 M M M
4/29/2012 7:00 AM 0.20 M M M M
4/30/2012 7:00 AM 0.00 0.0 M M M
5/1/2012 7:00 AM 0.06 M M M M VERY underwhelming. I think Gaithersburg was cheated out of a lot of rainfall.
5/2/2012 7:00 AM 0.05 M M M M
5/3/2012 7:00 AM 0.00 0.0 M M M
5/4/2012 7:00 AM 0.00 0.0 M M M
5/5/2012 7:00 AM 0.00 0.0 M M M
5/6/2012 7:00 AM 0.00 0.0 M M M
5/7/2012 7:00 AM 0.00 0.0 M M M
5/8/2012 7:00 AM 0.00 0.0 M M M
5/9/2012 7:00 AM 0.39 M M M M
5/10/2012 7:00 AM 0.49 M M M M
5/11/2012 7:00 AM 0.00 0.0 M M M
5/12/2012 7:00 AM 0.00 0.0 M M M
5/13/2012 7:00 AM 0.00 0.0 M M M
5/14/2012 7:00 AM 0.03 M M M M -RA at the time of observation. Rain event had just started at 7 AM EDT.
5/15/2012 7:00 AM 1.54 M M M M
5/16/2012 7:00 AM 0.00 0.0 M M M
5/17/2012 7:00 AM 0.00 0.0 M M M
5/18/2012 7:00 AM 0.00 0.0 M M M
5/19/2012 7:00 AM 0.00 0.0 M M M
5/20/2012 7:00 AM 0.00 0.0 M M M
5/21/2012 7:00 AM 0.06 M M M M Moderate rain at 7am ob time.
5/22/2012 7:00 AM 0.60 M M M M
5/23/2012 7:00 AM 0.04 M M M M
5/24/2012 7:00 AM 0.13 M M M M
5/25/2012 7:00 AM 0.02 M M M M
5/26/2012 7:00 AM 0.00 0.0 M M M
5/27/2012 7:00 AM 0.00 0.0 M M M
5/28/2012 7:00 AM 0.13 M M M M
5/29/2012 7:00 AM 0.00 0.0 M M M
5/30/2012 7:00 AM 1.12 M M M M
5/31/2012 7:00 AM 0.00 0.0 M M M
6/1/2012 7:00 AM 0.00 0.0 M M M
6/2/2012 7:00 AM 1.09 M M M M
6/3/2012 7:00 AM 0.00 0.0 M M M
6/4/2012 7:00 AM 0.02 M M M M
6/5/2012 7:00 AM 0.00 0.0 M M M
6/6/2012 7:00 AM 0.00 0.0 M M M
6/7/2012 7:00 AM 0.00 0.0 M M M
6/8/2012 7:00 AM 0.00 0.0 M M M
6/9/2012 7:00 AM 0.00 0.0 M M M
6/10/2012 7:00 AM 0.00 0.0 M M M
6/11/2012 7:00 AM 0.00 0.0 M M M
6/12/2012 7:00 AM 0.03 M M M M
6/13/2012 7:00 AM 0.56 M M M M
6/14/2012 7:00 AM 0.00 0.0 M M M
6/15/2012 7:00 AM 0.00 0.0 M M M
6/16/2012 7:00 AM 0.00 0.0 M M M
6/17/2012 7:00 AM 0.00 0.0 M M M
6/18/2012 7:00 AM 0.06 M M M M
6/19/2012 7:00 AM 0.07 M M M M
6/20/2012 7:00 AM 0.00 0.0 M M M
6/21/2012 7:00 AM 0.00 0.0 M M M
6/22/2012 7:00 AM 0.00 0.0 M M M
6/23/2012 7:00 AM 0.15 M M M M
6/24/2012 7:00 AM 0.00 0.0 M M M
6/25/2012 7:00 AM 0.00 0.0 M M M
6/26/2012 7:00 AM 0.00 0.0 M M M
6/27/2012 7:00 AM 0.00 0.0 M M M
6/28/2012 7:00 AM 0.00 0.0 M M M
6/29/2012 7:00 AM 0.00 0.0 M M M
6/30/2012 7:00 AM 0.51 M M M M
7/1/2012 7:00 AM 0.00 0.0 M M M
7/2/2012 7:00 AM 0.00 0.0 M M M
7/3/2012 7:00 AM 0.00 0.0 M M M
7/4/2012 7:00 AM 0.15 M M M M -TSRA around 9 PM
7/5/2012 7:00 AM 0.00 0.0 M M M
7/6/2012 7:00 AM 0.00 0.0 M M M
7/7/2012 7:00 AM 0.00 0.0 M M M
7/8/2012 7:00 AM 0.00 0.0 M M M
7/9/2012 7:00 AM 0.21 M M M M
7/10/2012 7:00 AM 0.05 M M M M
7/11/2012 7:00 AM 0.00 0.0 M M M
7/12/2012 7:00 AM 0.00 0.0 M M M
7/13/2012 7:00 AM 0.00 0.0 M M M
7/14/2012 7:00 AM 1.39 M M M M
7/15/2012 7:00 AM 0.00 0.0 M M M
7/16/2012 7:00 AM 0.06 M M M M
7/17/2012 7:00 AM 0.08 M M M M -TSRA for 5 minutes around 5:00 PM
7/18/2012 7:00 AM 0.00 0.0 M M M
7/19/2012 7:00 AM 0.00 0.0 M M M
7/20/2012 7:00 AM 1.23 M M M M +TSRA around 10 PM. Over 90% of the total fell in 20 minutes, causing our street to turn into a creek 4-5 inches deep. Winds were in the 30 mph range in our fairly protected cul-de-sac.
7/21/2012 7:00 AM 0.35 M M M M
7/22/2012 7:00 AM 0.20 M M M M
7/23/2012 7:00 AM 0.00 0.0 M M M
7/24/2012 7:00 AM 0.00 0.0 M M M
7/25/2012 7:00 AM 0.02 M M M M
7/26/2012 7:00 AM 0.00 0.0 M M M
7/27/2012 7:00 AM 0.01 M M M M
7/28/2012 7:00 AM 0.00 0.0 M M M
7/29/2012 7:00 AM 0.00 0.0 M M M
7/30/2012 7:00 AM 0.00 0.0 M M M
7/31/2012 7:00 AM 0.00 0.0 M M M
8/1/2012 7:00 AM 0.03 M M M M
8/2/2012 7:00 AM 0.00 0.0 M M M
8/3/2012 7:00 AM 0.00 0.0 M M M
8/4/2012 7:00 AM 0.00 0.0 M M M
8/5/2012 7:00 AM 0.00 0.0 M M M
8/6/2012 7:00 AM 0.26 M M M M
8/7/2012 7:00 AM 0.01 M M M M
8/8/2012 7:00 AM 0.00 0.0 M M M
8/9/2012 7:00 AM 0.47 M M M M
8/10/2012 7:00 AM 1.07 M M M M
8/11/2012 7:00 AM 0.15 M M M M
8/12/2012 7:00 AM 0.00 0.0 M M M
8/13/2012 7:00 AM 0.00 0.0 M M M
8/14/2012 7:00 AM 0.05 M M M M
8/15/2012 7:00 AM 0.00 0.0 M M M
8/16/2012 7:00 AM 0.00 0.0 M M M
8/17/2012 7:00 AM 0.00 0.0 M M M
8/18/2012 7:00 AM 0.06 M M M M
8/19/2012 7:00 AM 0.00 0.0 M M M
8/20/2012 7:00 AM 0.58 M M M M
8/21/2012 7:00 AM 0.23 M M M M
8/22/2012 7:00 AM 0.00 0.0 M M M
8/23/2012 7:00 AM 1.12 M M M M Most of this fell in 30 minutes from 650 to 720 pm.
8/24/2012 7:00 AM 0.00 0.0 M M M
8/25/2012 7:00 AM 0.00 0.0 M M M
8/26/2012 7:00 AM 0.00 0.0 M M M
8/27/2012 7:00 AM 1.19 M M M M
8/28/2012 7:00 AM 0.06 M M M M
8/29/2012 7:00 AM 0.01 M M M M
8/30/2012 7:00 AM 0.00 0.0 M M M
8/31/2012 7:00 AM 0.00 0.0 M M M
9/1/2012 7:00 AM 0.00 0.0 M M M
9/2/2012 7:00 AM 0.00 0.0 M M M
9/3/2012 7:00 AM 0.04 M M M M
9/4/2012 7:00 AM 0.02 M M M M
9/5/2012 7:00 AM 0.00 0.0 M M M
9/6/2012 7:00 AM 0.00 0.0 M M M
9/7/2012 7:00 AM 0.02 M M M M
9/8/2012 7:00 AM 0.00 0.0 M M M
9/9/2012 7:00 AM 0.57 M M M M
9/10/2012 7:00 AM 0.00 0.0 M M M
9/11/2012 7:00 AM 0.00 0.0 M M M
9/12/2012 7:00 AM 0.00 0.0 M M M
9/13/2012 7:00 AM 0.00 0.0 M M M
9/14/2012 7:00 AM 0.00 0.0 M M M
9/15/2012 7:00 AM 0.00 0.0 M M M
9/16/2012 7:00 AM 0.00 0.0 M M M
9/17/2012 7:00 AM 0.00 0.0 M M M
9/18/2012 7:00 AM 0.21 M M M M
9/19/2012 7:00 AM 0.90 M M M M
9/20/2012 7:00 AM 0.00 0.0 M M M
9/21/2012 7:00 AM 0.00 0.0 M M M
9/22/2012 7:00 AM 0.00 0.0 M M M
9/23/2012 7:00 AM 0.00 0.0 M M M
9/24/2012 7:00 AM 0.00 0.0 M M M
9/25/2012 7:00 AM 0.00 0.0 M M M
9/26/2012 7:00 AM 0.09 M M M M
9/27/2012 7:00 AM 0.00 0.0 M M M
9/28/2012 7:00 AM 0.53 M M M M
9/29/2012 7:00 AM 0.02 M M M M
9/30/2012 7:00 AM 0.00 0.0 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