Station Overview Station Location
Station Number PA-CH-11 Latitude 39.915039
Station Name Unionville 2.2 NE Longitude -75.703197
County Chester Elevation (ft) 333



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 3.92 4.74 31 1.56 27 3.18 4 2 10 3 0.0 0 0
Nov 17 3.71 1.29 30 1.29 30 0.00 0 0 10 2 0.0 0 0
Dec 17 3.86 1.71 31 1.71 31 0.00 0 0 11 1 9.1 4 4
Jan 18 3.40 2.20 31 2.20 31 0.00 0 0 14 1 1.5 1 1
Feb 18 2.86 6.56 28 6.56 28 0.00 0 0 17 0 2.0 1 1
March 18 4.10 3.96 31 0.24 22 3.72 9 4 3 0 0.0 0 0
April 18 3.84 3.57 30 3.57 30 0.00 0 0 17 0 0.0 0 0
May 18 4.17 6.63 31 6.63 31 0.00 0 0 18 1 0.0 0 0
June 18 3.98 3.79 30 3.79 30 0.00 0 0 11 1 0.0 0 0
July 18 4.57 8.91 31 8.91 31 0.00 0 0 12 0 0.0 0 0
Aug 18 3.78 7.97 31 6.83 29 1.14 2 1 14 0 0.0 0 0
Sept 18 4.85 9.88 30 7.48 28 2.40 2 1 20 0 0.0 0 0
Water Year Totals: 47.04" 61.21" 365 days 50.77" 348 10.44" 17 days 8 157 days 9 days 12.6" 6 days 6 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 0.00
10/2/2017 0.00
10/3/2017 0.00
10/4/2017 0.00
10/5/2017 0.00
10/6/2017 0.01
10/7/2017 0.00
10/8/2017 0.04
10/9/2017 0.08
10/10/2017 0.76
10/11/2017 T
10/12/2017 **
10/13/2017 0.38
10/14/2017 0.08
10/15/2017 0.02
10/16/2017 0.03
10/17/2017 T
10/18/2017 0.00
10/19/2017 0.00
10/20/2017 0.00
10/21/2017 0.00
10/22/2017 0.00
10/23/2017 0.00
10/24/2017 0.06
10/25/2017 0.46
10/26/2017 T
10/27/2017 0.00
10/28/2017 0.00
10/29/2017 **
10/30/2017 2.80
10/31/2017 0.02
11/1/2017 0.00
11/2/2017 0.01
11/3/2017 0.00
11/4/2017 0.00
11/5/2017 0.34
11/6/2017 T
11/7/2017 0.00
11/8/2017 0.38
11/9/2017 0.00
11/10/2017 0.03
11/11/2017 0.00
11/12/2017 0.00
11/13/2017 0.22
11/14/2017 0.01
11/15/2017 0.00
11/16/2017 0.02
11/17/2017 T
11/18/2017 0.00
11/19/2017 0.25
11/20/2017 0.00
11/21/2017 0.00
11/22/2017 0.02
11/23/2017 0.01
11/24/2017 0.00
11/25/2017 0.00
11/26/2017 0.00
11/27/2017 0.00
11/28/2017 0.00
11/29/2017 0.00
11/30/2017 0.00
12/1/2017 0.04
12/2/2017 0.00
12/3/2017 T
12/4/2017 0.00
12/5/2017 0.00
12/6/2017 0.21
12/7/2017 0.00
12/8/2017 0.01
12/9/2017 0.00
12/10/2017 0.32
12/11/2017 0.00
12/12/2017 0.00
12/13/2017 0.00
12/14/2017 0.10
12/15/2017 0.00
12/16/2017 0.18
12/17/2017 0.00
12/18/2017 0.00
12/19/2017 0.00
12/20/2017 0.00
12/21/2017 0.00
12/22/2017 0.00
12/23/2017 0.20
12/24/2017 0.49
12/25/2017 0.11
12/26/2017 0.00
12/27/2017 0.00
12/28/2017 0.00
12/29/2017 0.00
12/30/2017 0.04
12/31/2017 0.01
Day of YearDaily PrcpMultiday Prcp
1/1/2018 0.00
1/2/2018 0.00
1/3/2018 0.00
1/4/2018 0.12
1/5/2018 0.13
1/6/2018 0.00
1/7/2018 0.00
1/8/2018 0.00
1/9/2018 0.07
1/10/2018 0.00
1/11/2018 0.00
1/12/2018 0.10
1/13/2018 0.72
1/14/2018 T
1/15/2018 0.00
1/16/2018 0.01
1/17/2018 0.18
1/18/2018 0.01
1/19/2018 0.00
1/20/2018 0.00
1/21/2018 0.00
1/22/2018 0.00
1/23/2018 0.23
1/24/2018 0.28
1/25/2018 0.00
1/26/2018 0.00
1/27/2018 0.00
1/28/2018 0.10
1/29/2018 0.15
1/30/2018 0.02
1/31/2018 0.08
2/1/2018 0.00
2/2/2018 0.16
2/3/2018 0.00
2/4/2018 0.00
2/5/2018 1.18
2/6/2018 0.00
2/7/2018 0.12
2/8/2018 0.77
2/9/2018 0.00
2/10/2018 0.00
2/11/2018 0.87
2/12/2018 1.02
2/13/2018 0.01
2/14/2018 0.00
2/15/2018 0.20
2/16/2018 0.66
2/17/2018 0.07
2/18/2018 0.35
2/19/2018 0.00
2/20/2018 0.02
2/21/2018 0.00
2/22/2018 0.02
2/23/2018 0.34
2/24/2018 0.14
2/25/2018 0.35
2/26/2018 0.28
2/27/2018 0.00
2/28/2018 0.00
3/1/2018 0.00
3/2/2018 **
3/3/2018 1.05
3/4/2018 0.00
3/5/2018 0.00
3/6/2018 0.00
3/7/2018 **
3/8/2018 **
3/9/2018 1.22
3/10/2018 0.00
3/11/2018 0.00
3/12/2018 0.00
3/13/2018 0.09
3/14/2018 0.00
3/15/2018 0.00
3/16/2018 0.00
3/17/2018 0.00
3/18/2018 0.00
3/19/2018 0.00
3/20/2018 0.00
3/21/2018 **
3/22/2018 1.20
3/23/2018 0.00
3/24/2018 0.00
3/25/2018 0.00
3/26/2018 0.00
3/27/2018 0.00
3/28/2018 **
3/29/2018 0.25
3/30/2018 0.01
3/31/2018 0.14
Day of YearDaily PrcpMultiday Prcp
4/1/2018 0.00
4/2/2018 0.25
4/3/2018 0.04
4/4/2018 0.19
4/5/2018 0.10
4/6/2018 0.03
4/7/2018 0.01
4/8/2018 0.00
4/9/2018 0.00
4/10/2018 0.04
4/11/2018 0.00
4/12/2018 0.00
4/13/2018 0.00
4/14/2018 0.00
4/15/2018 0.00
4/16/2018 1.45
4/17/2018 0.27
4/18/2018 0.02
4/19/2018 0.01
4/20/2018 0.02
4/21/2018 0.00
4/22/2018 0.00
4/23/2018 0.00
4/24/2018 0.00
4/25/2018 0.72
4/26/2018 0.02
4/27/2018 0.25
4/28/2018 0.03
4/29/2018 0.12
4/30/2018 0.00
5/1/2018 0.00
5/2/2018 0.00
5/3/2018 0.00
5/4/2018 0.00
5/5/2018 0.00
5/6/2018 0.10
5/7/2018 0.05
5/8/2018 0.00
5/9/2018 0.00
5/10/2018 0.00
5/11/2018 0.32
5/12/2018 0.92
5/13/2018 0.47
5/14/2018 0.88
5/15/2018 0.01
5/16/2018 0.59
5/17/2018 1.12
5/18/2018 0.23
5/19/2018 1.02
5/20/2018 0.20
5/21/2018 0.00
5/22/2018 0.00
5/23/2018 0.49
5/24/2018 T
5/25/2018 0.00
5/26/2018 0.00
5/27/2018 0.10
5/28/2018 0.03
5/29/2018 0.02
5/30/2018 0.01
5/31/2018 0.07
6/1/2018 0.02
6/2/2018 0.27
6/3/2018 0.33
6/4/2018 0.66
6/5/2018 0.01
6/6/2018 0.00
6/7/2018 0.00
6/8/2018 0.00
6/9/2018 0.00
6/10/2018 0.00
6/11/2018 1.96
6/12/2018 0.02
6/13/2018 0.00
6/14/2018 T
6/15/2018 0.00
6/16/2018 0.00
6/17/2018 0.00
6/18/2018 0.00
6/19/2018 0.00
6/20/2018 0.00
6/21/2018 0.00
6/22/2018 0.00
6/23/2018 0.07
6/24/2018 0.08
6/25/2018 0.31
6/26/2018 0.00
6/27/2018 0.00
6/28/2018 0.06
6/29/2018 0.00
6/30/2018 0.00
Day of YearDaily PrcpMultiday Prcp
7/1/2018 0.00
7/2/2018 0.00
7/3/2018 0.00
7/4/2018 2.95
7/5/2018 0.00
7/6/2018 0.06
7/7/2018 0.10
7/8/2018 0.00
7/9/2018 0.00
7/10/2018 0.00
7/11/2018 0.00
7/12/2018 0.00
7/13/2018 0.00
7/14/2018 0.00
7/15/2018 0.00
7/16/2018 0.19
7/17/2018 0.00
7/18/2018 1.31
7/19/2018 0.00
7/20/2018 0.00
7/21/2018 0.00
7/22/2018 2.12
7/23/2018 0.27
7/24/2018 0.78
7/25/2018 0.34
7/26/2018 0.68
7/27/2018 0.01
7/28/2018 0.10
7/29/2018 0.00
7/30/2018 0.00
7/31/2018 0.00
8/1/2018 0.03
8/2/2018 0.16
8/3/2018 0.02
8/4/2018 0.70
8/5/2018 0.04
8/6/2018 0.00
8/7/2018 0.00
8/8/2018 0.05
8/9/2018 0.11
8/10/2018 0.00
8/11/2018 **
8/12/2018 1.14
8/13/2018 1.87
8/14/2018 0.05
8/15/2018 0.24
8/16/2018 0.00
8/17/2018 0.00
8/18/2018 0.13
8/19/2018 0.31
8/20/2018 2.74
8/21/2018 0.00
8/22/2018 0.38
8/23/2018 0.00
8/24/2018 0.00
8/25/2018 0.00
8/26/2018 0.00
8/27/2018 0.00
8/28/2018 0.00
8/29/2018 0.00
8/30/2018 0.00
8/31/2018 0.00
9/1/2018 1.18
9/2/2018 0.04
9/3/2018 0.00
9/4/2018 0.04
9/5/2018 0.00
9/6/2018 0.00
9/7/2018 0.35
9/8/2018 1.12
9/9/2018 **
9/10/2018 2.40
9/11/2018 0.06
9/12/2018 0.05
9/13/2018 0.23
9/14/2018 0.02
9/15/2018 0.00
9/16/2018 0.00
9/17/2018 0.00
9/18/2018 0.54
9/19/2018 0.87
9/20/2018 0.01
9/21/2018 0.00
9/22/2018 0.02
9/23/2018 0.03
9/24/2018 0.58
9/25/2018 0.16
9/26/2018 0.48
9/27/2018 0.25
9/28/2018 1.44
9/29/2018 0.01
9/30/2018 0.00



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
10/1/2017 7:30 AM 0.00 0.0 M M M
10/2/2017 7:30 AM 0.00 0.0 M M M
10/3/2017 7:30 AM 0.00 0.0 M M M
10/4/2017 7:30 AM 0.00 0.0 M M M
10/5/2017 7:30 AM 0.00 0.0 M M M
10/6/2017 7:30 AM 0.01 M M M M
10/7/2017 7:30 AM 0.00 0.0 M M M
10/8/2017 7:30 AM 0.04 M M M M
10/9/2017 7:55 AM 0.08 M M M M
10/10/2017 7:30 AM 0.76 M M M M Finally...some rain!!
10/11/2017 7:30 AM T M M M M
10/14/2017 7:30 AM 0.08 M M M M
10/15/2017 7:30 AM 0.02 M M M M
10/16/2017 7:30 AM 0.03 M M M M
10/17/2017 7:30 AM T M M M M
10/18/2017 7:30 AM 0.00 0.0 M M M
10/19/2017 7:30 AM 0.00 0.0 M M M
10/20/2017 7:30 AM 0.00 0.0 M M M
10/21/2017 7:30 AM 0.00 0.0 M M M
10/22/2017 7:30 AM 0.00 0.0 M M M
10/23/2017 7:30 AM 0.00 0.0 M M M
10/24/2017 7:35 AM 0.06 M M M M
10/25/2017 7:30 AM 0.46 M M M M
10/26/2017 7:30 AM T 0.0 M M M
10/27/2017 7:30 AM 0.00 0.0 M M M
10/28/2017 7:30 AM 0.00 0.0 M M M
10/31/2017 7:30 AM 0.02 M M M M
11/1/2017 7:30 AM 0.00 0.0 M M M
11/2/2017 7:50 AM 0.01 M M M M
11/3/2017 7:30 AM 0.00 0.0 M M M
11/4/2017 7:30 AM 0.00 0.0 M M M
11/5/2017 7:30 AM 0.34 M M M M
11/6/2017 7:30 AM T M M M M
11/7/2017 7:30 AM 0.00 0.0 M M M
11/8/2017 7:30 AM 0.38 M M M M
11/9/2017 7:30 AM 0.00 0.0 M M M
11/10/2017 7:30 AM 0.03 M M M M
11/11/2017 7:30 AM 0.00 0.0 M M M
11/12/2017 7:30 AM 0.00 0.0 M M M
11/13/2017 7:45 AM 0.22 M M M M
11/14/2017 7:30 AM 0.01 M M M M
11/15/2017 7:30 AM 0.00 0.0 M M M
11/16/2017 7:30 AM 0.02 M M M M
11/17/2017 7:30 AM T M M M M
11/18/2017 7:30 AM 0.00 0.0 M M M
11/19/2017 7:30 AM 0.25 M M M M
11/20/2017 7:30 AM 0.00 0.0 M M M
11/21/2017 7:30 AM 0.00 0.0 M M M
11/22/2017 7:30 AM 0.02 M M M M
11/23/2017 7:30 AM 0.01 0.0 M M M
11/24/2017 7:30 AM 0.00 0.0 M M M
11/25/2017 7:30 AM 0.00 0.0 M M M
11/26/2017 7:30 AM 0.00 0.0 M M M
11/27/2017 7:30 AM 0.00 0.0 M M M
11/28/2017 7:30 AM 0.00 0.0 M M M
11/29/2017 7:30 AM 0.00 0.0 M M M
11/30/2017 7:30 AM 0.00 0.0 M M M
12/1/2017 7:30 AM 0.04 M M M M
12/2/2017 7:30 AM 0.00 0.0 M M M
12/3/2017 7:30 AM T M M M M
12/4/2017 7:30 AM 0.00 0.0 M M M
12/5/2017 7:30 AM 0.00 0.0 M M M
12/6/2017 7:30 AM 0.21 M M M M
12/7/2017 7:30 AM 0.00 0.0 M M M
12/8/2017 7:30 AM 0.01 M M M M
12/9/2017 7:30 AM 0.00 0.0 M M M
12/10/2017 7:30 AM 0.32 3.8 0.32 3.8 0.30 melt from 3.8" new snow
12/11/2017 7:30 AM 0.00 0.0 M M M
12/12/2017 7:30 AM 0.00 0.0 M M M
12/13/2017 7:30 AM 0.00 0.0 M M M
12/14/2017 7:30 AM 0.10 1.2 0.10 1.2 0.10 a dusting of snow...amounting to about 1.2"
12/15/2017 7:30 AM 0.00 0.0 M M M
12/16/2017 7:30 AM 0.18 2.7 0.18 3.5 M
12/17/2017 7:30 AM 0.00 0.0 M M M
12/18/2017 7:30 AM 0.00 0.0 M M M
12/19/2017 7:30 AM 0.00 0.0 M M M
12/20/2017 7:30 AM 0.00 0.0 M M M Still no rain. Very concerning.
12/21/2017 7:30 AM 0.00 0.0 M M M still not a drop of rain.
12/22/2017 7:30 AM 0.00 0.0 M M M
12/23/2017 8:20 AM 0.20 M M M M
12/24/2017 7:30 AM 0.49 M M M M
12/25/2017 7:30 AM 0.11 M M M M
12/26/2017 7:30 AM 0.00 0.0 M M M
12/27/2017 7:30 AM 0.00 0.0 M M M
12/28/2017 7:30 AM 0.00 0.0 M M M
12/29/2017 7:30 AM 0.00 0.0 M M M
12/30/2017 8:00 AM 0.04 1.4 0.40 1.4 0.40
12/31/2017 7:30 AM 0.01 M M M M
1/1/2018 7:30 AM 0.00 0.0 M M M
1/2/2018 7:30 AM 0.00 M M M M
1/3/2018 7:30 AM 0.00 0.0 M M M
1/4/2018 7:45 AM 0.12 M M M M Not much snow...hard to tell exactly how with the blowing...I'd estimate <2".
1/5/2018 7:30 AM 0.13 M M M M from snow melt.
1/6/2018 7:30 AM 0.00 0.0 M M M
1/7/2018 7:30 AM 0.00 0.0 M M M
1/8/2018 7:30 AM 0.00 0.0 M M M
1/9/2018 7:30 AM 0.07 M M M M rain/sleet mix
1/10/2018 7:30 AM 0.00 0.0 M M M
1/11/2018 7:30 AM 0.00 0.0 M M M
1/12/2018 8:05 AM 0.10 M M M M
1/13/2018 7:30 AM 0.72 M M M M All rain
1/14/2018 7:30 AM T M M M M
1/15/2018 7:30 AM 0.00 0.0 M M M
1/16/2018 7:30 AM 0.01 M M M M trace of fallen snow that melted very quickly.
1/17/2018 8:30 AM 0.18 1.5 0.18 1.5 M Melt from about 1.5" of very heavy and wet snow
1/18/2018 7:30 AM 0.01 M M M M
1/19/2018 7:30 AM 0.00 0.0 M M M
1/20/2018 7:30 AM 0.00 0.0 M M M
1/21/2018 7:30 AM 0.00 0.0 M M M
1/22/2018 7:30 AM 0.00 0.0 M M M
1/23/2018 8:05 AM 0.23 M M M M
1/24/2018 7:30 AM 0.28 M M M M
1/25/2018 7:30 AM 0.00 M M M M
1/26/2018 7:30 AM 0.00 0.0 M M M
1/27/2018 7:30 AM 0.00 0.0 M M M
1/28/2018 8:30 AM 0.10 M M M M
1/29/2018 7:30 AM 0.15 M M M M
1/30/2018 7:40 AM 0.02 M M M M melt from a dusting of snow
1/31/2018 7:30 AM 0.08 M M M M Snow melt. Ground cover varies. Very spotty blanket.
2/1/2018 7:30 AM 0.00 0.0 M M M
2/2/2018 7:45 AM 0.16 M M M M dusting of rain mixed with freezing rain towards the end. Ground and horizontal surfaces were nearly totally covered with small, hard pellets.
2/3/2018 7:30 AM 0.00 0.0 M M M
2/4/2018 7:30 AM 0.00 M M M M
2/5/2018 7:30 AM 1.18 M M M M
2/6/2018 7:30 AM 0.00 0.0 M M M
2/7/2018 7:50 AM 0.12 M M M M semi-solid pellets/water mixture. No real accumulation
2/8/2018 7:30 AM 0.77 M M M M Some ice to start but the rest was rain as the temperature rose into the 30s.
2/9/2018 7:30 AM 0.00 0.0 M M M
2/10/2018 7:30 AM 0.00 0.0 M M M
2/11/2018 7:50 AM 0.87 M M M M Heavy at times over night.
2/12/2018 7:30 AM 1.02 M M M M
2/13/2018 7:30 AM 0.01 M M M M
2/14/2018 7:30 AM 0.00 0.0 M M M
2/15/2018 7:30 AM 0.20 M M M M
2/16/2018 7:30 AM 0.66 M M M M
2/17/2018 7:30 AM 0.07 M M M M
2/18/2018 7:45 AM 0.35 2.0 0.35 2.0 0.35 From exactly 2" of very solidly packed snow/ice mass with a crust.
2/19/2018 7:30 AM 0.00 M M M M
2/20/2018 7:30 AM 0.02 M M M M
2/21/2018 7:30 AM 0.00 0.0 M M M
2/22/2018 7:50 AM 0.02 M M M M
2/23/2018 7:55 AM 0.34 M M M M
2/24/2018 7:30 AM 0.14 M M M M
2/25/2018 7:10 AM 0.35 M M M M
2/26/2018 4:30 PM 0.28 M M M M
2/27/2018 7:30 AM 0.00 0.0 M M M
2/28/2018 7:30 AM 0.00 0.0 M M M
3/1/2018 7:30 AM 0.00 0.0 M M M
3/4/2018 7:30 AM 0.00 0.0 M M M
3/5/2018 7:30 AM 0.00 0.0 M M M
3/6/2018 7:30 AM 0.00 0.0 M M M
3/10/2018 7:30 AM 0.00 0.0 M M M
3/11/2018 7:30 AM 0.00 0.0 M M M
3/12/2018 7:30 AM 0.00 0.0 M M M
3/13/2018 7:30 AM 0.09 M M M M
3/14/2018 7:30 AM 0.00 0.0 M M M
3/15/2018 7:30 AM 0.00 0.0 M M M
3/16/2018 7:30 AM 0.00 0.0 M M M
3/17/2018 7:30 AM 0.00 0.0 M M M
3/18/2018 7:30 AM 0.00 0.0 M M M
3/19/2018 7:30 AM 0.00 0.0 M M M
3/20/2018 7:30 AM 0.00 0.0 M M M
3/23/2018 7:30 AM 0.00 0.0 M M M
3/24/2018 7:30 AM 0.00 0.0 M M M
3/25/2018 7:30 AM 0.00 0.0 M M M
3/26/2018 7:30 AM 0.00 0.0 M M M
3/27/2018 7:30 AM 0.00 0.0 M M M
3/30/2018 7:30 AM 0.01 M M M M
3/31/2018 7:30 AM 0.14 M M M M
4/1/2018 7:30 AM 0.00 0.0 M M M
4/2/2018 7:55 AM 0.25 M M M M melted from a crust of ice/snow/sleet.
4/3/2018 8:10 AM 0.04 M M M M
4/4/2018 7:30 AM 0.19 M M M M
4/5/2018 7:30 AM 0.10 M M M M
4/6/2018 7:50 AM 0.03 M M M M
4/7/2018 7:30 AM 0.01 M M M M
4/8/2018 7:30 AM 0.00 0.0 M M M
4/9/2018 7:30 AM 0.00 M M M M
4/10/2018 7:45 AM 0.04 M M M M
4/11/2018 7:30 AM 0.00 0.0 M M M
4/12/2018 7:30 AM 0.00 0.0 M M M
4/13/2018 7:30 AM 0.00 0.0 M M M
4/14/2018 7:30 AM 0.00 0.0 M M M
4/15/2018 7:30 AM 0.00 0.0 M M M
4/16/2018 7:35 AM 1.45 M M M M
4/17/2018 7:30 AM 0.27 M M M M
4/18/2018 7:30 AM 0.02 M M M M
4/19/2018 7:30 AM 0.01 M M M M
4/20/2018 7:30 AM 0.02 M M M M
4/21/2018 7:30 AM 0.00 0.0 M M M
4/22/2018 7:30 AM 0.00 0.0 M M M
4/23/2018 7:30 AM 0.00 0.0 M M M
4/24/2018 7:30 AM 0.00 0.0 M M M
4/25/2018 8:20 AM 0.72 M M M M
4/26/2018 7:30 AM 0.02 M M M M
4/27/2018 8:30 AM 0.25 M M M M
4/28/2018 7:30 AM 0.03 M M M M
4/29/2018 7:30 AM 0.12 M M M M
4/30/2018 7:30 AM 0.00 0.0 M M M
5/1/2018 7:30 AM 0.00 0.0 M M M
5/2/2018 7:15 AM 0.00 0.0 M M M
5/3/2018 7:30 AM 0.00 0.0 M M M
5/4/2018 7:30 AM 0.00 0.0 M M M
5/5/2018 7:30 AM 0.00 0.0 M M M
5/6/2018 7:30 AM 0.10 M M M M
5/7/2018 7:30 AM 0.05 M M M M
5/8/2018 7:30 AM 0.00 0.0 M M M
5/9/2018 7:30 AM 0.00 0.0 M M M
5/10/2018 7:30 AM 0.00 0.0 M M M
5/11/2018 7:30 AM 0.32 M M M M
5/12/2018 7:30 AM 0.92 M M M M
5/13/2018 7:30 AM 0.47 M M M M
5/14/2018 7:30 AM 0.88 M M M M
5/15/2018 7:30 AM 0.01 M M M M
5/16/2018 7:30 AM 0.59 M M M M This storm had copious lightning and periods of very heavy rain. There wasn't very much wind, however. Only a moderate degree at times.
5/17/2018 7:30 AM 1.12 M M M M
5/18/2018 8:00 AM 0.23 M M M M
5/19/2018 7:30 PM 1.02 M M M M
5/20/2018 7:30 PM 0.20 M M M M
5/21/2018 7:30 AM 0.00 0.0 M M M
5/22/2018 7:30 AM 0.00 0.0 M M M
5/23/2018 7:30 AM 0.49 M M M M
5/24/2018 7:30 AM T M M M M
5/25/2018 7:30 AM 0.00 0.0 M M M
5/26/2018 7:30 AM 0.00 0.0 M M M
5/27/2018 8:05 AM 0.10 M M M M
5/28/2018 7:40 AM 0.03 M M M M
5/29/2018 7:30 AM 0.02 M M M M
5/30/2018 7:30 AM 0.01 M M M M
5/31/2018 7:30 AM 0.07 M M M M
6/1/2018 7:30 AM 0.02 M M M M
6/2/2018 7:30 AM 0.27 M M M M
6/3/2018 7:30 AM 0.33 M M M M
6/4/2018 7:30 AM 0.66 M M M M
6/5/2018 7:30 AM 0.01 M M M M
6/6/2018 7:30 AM 0.00 0.0 M M M
6/7/2018 7:30 AM 0.00 0.0 M M M
6/8/2018 7:30 AM 0.00 0.0 M M M
6/9/2018 7:30 AM 0.00 0.0 M M M
6/10/2018 7:30 AM 0.00 0.0 M M M
6/11/2018 7:30 AM 1.96 M M M M
6/12/2018 7:30 AM 0.02 M M M M
6/13/2018 7:30 AM 0.00 0.0 M M M
6/14/2018 7:30 AM T M M M M
6/15/2018 7:30 AM 0.00 0.0 M M M
6/16/2018 7:30 AM 0.00 0.0 M M M
6/17/2018 7:30 AM 0.00 0.0 M M M
6/18/2018 7:30 AM 0.00 0.0 M M M
6/19/2018 7:30 AM 0.00 0.0 M M M
6/20/2018 7:30 AM 0.00 0.0 M M M
6/21/2018 7:30 AM 0.00 0.0 M M M
6/22/2018 7:30 AM 0.00 0.0 M M M
6/23/2018 7:30 AM 0.07 M M M M
6/24/2018 7:30 AM 0.08 M M M M
6/25/2018 9:00 AM 0.31 M M M M
6/26/2018 7:30 AM 0.00 0.0 M M M
6/27/2018 7:30 AM 0.00 0.0 M M M
6/28/2018 9:30 AM 0.06 M M M M
6/29/2018 7:30 AM 0.00 0.0 M M M
6/30/2018 7:30 AM 0.00 0.0 M M M
7/1/2018 7:30 AM 0.00 0.0 M M M
7/2/2018 7:30 AM 0.00 0.0 M M M
7/3/2018 7:30 AM 0.00 0.0 M M M
7/4/2018 7:30 AM 2.95 M M M M Unbelievably heavy and prolonged storm lasting from about 6:30 PM late into the evening. It brought vivid lightning, short-lived but heavy winds and torrential downpours. Local streets were flooded and creeks overtopped their banks in many places. Temperatures in the late afternoon reached the mid-to upper-90's with very high humidity levels, a situation perfect for the formation of storm activity, even though there was no organized cold front nearby. The evening cooling was enough to make the air unstable. And for sure it began to form just north of and right over top of us between 5 and 6 PM and clouds formed and skies darkened. Then it began to rain. It was a very slowly moving storm. It was quite localized, hovering just over this southern Chester County Pennsylvania geographic area plus nearby parts of Philadelphia, immediate northern Delaware, and western New Jersey. Except for what fell on blacktop, it's been so dry that fields and pastures seemed to soak it right up! There was minor street flooding during the storm but it wasn't excessive, at least not in these immediate parts, and it abated soon after the rain began to diminish. But the lightning was amazing! Lightning bolts were dancing around like raindrops at times...or so it seems.
7/5/2018 7:30 AM 0.00 0.0 M M M
7/6/2018 7:30 AM 0.06 M M M M
7/7/2018 7:30 AM 0.10 M M M M
7/8/2018 7:30 AM 0.00 0.0 M M M
7/9/2018 7:30 AM 0.00 0.0 M M M
7/10/2018 7:30 AM 0.00 0.0 M M M
7/11/2018 7:30 AM 0.00 0.0 M M M
7/12/2018 7:30 AM 0.00 0.0 M M M
7/13/2018 7:30 AM 0.00 0.0 M M M
7/14/2018 7:30 AM 0.00 0.0 M M M
7/15/2018 7:30 AM 0.00 0.0 M M M
7/16/2018 7:30 AM 0.19 M M M M
7/17/2018 7:30 AM 0.00 0.0 M M M
7/18/2018 7:30 AM 1.31 M M M M
7/19/2018 7:30 AM 0.00 0.0 M M M
7/20/2018 7:30 AM 0.00 0.0 M M M
7/21/2018 7:30 AM 0.00 0.0 M M M
7/22/2018 7:30 AM 2.12 M M M M It got pretty heavy at times.
7/23/2018 7:30 AM 0.27 M M M M
7/24/2018 8:00 AM 0.78 M M M M
7/25/2018 7:30 AM 0.34 M M M M
7/26/2018 7:30 AM 0.68 M M M M
7/27/2018 7:30 AM 0.01 M M M M
7/28/2018 7:30 AM 0.10 M M M M
7/29/2018 7:30 AM 0.00 0.0 M M M
7/30/2018 7:30 AM 0.00 0.0 M M M
7/31/2018 7:30 AM 0.00 0.0 M M M
8/1/2018 7:30 AM 0.03 M M M M
8/2/2018 7:30 AM 0.16 M M M M
8/3/2018 7:30 AM 0.02 M M M M
8/4/2018 7:50 AM 0.70 M M M M
8/5/2018 7:30 AM 0.04 M M M M
8/6/2018 7:30 AM 0.00 0.0 M M M
8/7/2018 7:30 AM 0.00 0.0 M M M
8/8/2018 7:30 AM 0.05 M M M M
8/9/2018 7:15 AM 0.11 M M M M
8/10/2018 7:30 AM 0.00 0.0 M M M
8/13/2018 7:55 AM 1.87 M M M M
8/14/2018 8:11 AM 0.05 M M M M
8/15/2018 8:00 AM 0.24 M M M M
8/16/2018 7:30 AM 0.00 0.0 M M M
8/17/2018 7:30 AM 0.00 0.0 M M M
8/18/2018 8:05 AM 0.13 M M M M
8/19/2018 7:30 AM 0.31 M M M M
8/20/2018 8:10 AM 2.74 M M M M
8/21/2018 7:30 AM 0.00 0.0 M M M
8/22/2018 7:45 AM 0.38 M M M M
8/23/2018 7:30 AM 0.00 0.0 M M M
8/24/2018 7:30 AM 0.00 0.0 M M M
8/25/2018 7:30 AM 0.00 0.0 M M M
8/26/2018 7:30 AM 0.00 0.0 M M M
8/27/2018 7:30 AM 0.00 0.0 M M M
8/28/2018 7:30 AM 0.00 0.0 M M M
8/29/2018 7:30 AM 0.00 0.0 M M M
8/30/2018 7:30 AM 0.00 0.0 M M M
8/31/2018 7:30 AM 0.00 0.0 M M M
9/1/2018 7:45 AM 1.18 M M M M
9/2/2018 8:00 AM 0.04 0.0 M M M
9/3/2018 7:30 AM 0.00 0.0 M M M
9/4/2018 7:30 AM 0.04 M M M M
9/5/2018 7:30 AM 0.00 0.0 M M M Heat index hit 110 in this area yesterday late afternoon
9/6/2018 7:30 AM 0.00 0.0 M M M
9/7/2018 8:05 AM 0.35 M M M M
9/8/2018 8:20 AM 1.12 M M M M
9/11/2018 8:00 AM 0.06 M M M M
9/12/2018 7:30 AM 0.05 M M M M
9/13/2018 8:00 AM 0.23 M M M M
9/14/2018 7:30 AM 0.02 M M M M
9/15/2018 7:30 AM 0.00 0.0 M M M
9/16/2018 7:30 AM 0.00 0.0 M M M
9/17/2018 7:30 AM 0.00 0.0 M M M
9/18/2018 7:30 AM 0.54 M M M M
9/19/2018 7:30 AM 0.87 M M M M
9/20/2018 7:30 AM 0.01 M M M M
9/21/2018 7:30 AM 0.00 0.0 M M M
9/22/2018 7:30 AM 0.02 M M M M
9/23/2018 8:20 AM 0.03 M M M M
9/24/2018 7:30 AM 0.58 M M M M
9/25/2018 7:45 AM 0.16 M M M M
9/26/2018 7:30 AM 0.48 M M M M
9/27/2018 7:30 AM 0.25 M M M M
9/28/2018 7:30 AM 1.44 M M M M We experienced periods of very heavy rain overnight
9/29/2018 7:30 AM 0.01 M M M M
9/30/2018 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
10/12/2017 10/13/2017 7:30 AM 2 0.38 M M
10/29/2017 10/30/2017 7:40 AM 2 2.80 M M
3/2/2018 3/03/2018 7:30 AM 2 1.05 M M
3/7/2018 3/09/2018 7:30 AM 3 1.22 M M
3/21/2018 3/22/2018 7:30 AM 2 1.20 M M
3/28/2018 3/29/2018 9:00 AM 2 0.25 M M
8/11/2018 8/12/2018 8:19 AM 2 1.14 M M
9/9/2018 9/10/2018 7:30 AM 2 2.40 M M almost continuous rain



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