Station Overview Station Location
Station Number PA-CH-17 Latitude 40.040444
Station Name Malvern 0.5 NNE Longitude -75.510789
County Chester Elevation (ft) 546



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 4.02 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Nov 11 3.66 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Dec 11 3.94 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Jan 12 3.30 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Feb 12 2.80 0.00 2 0.00 2 0.00 0 0 0 0 0.0 0 0
March 12 3.62 2.04 24 2.04 24 0.00 0 0 9 1 0.0 0 0
April 12 3.84 3.57 15 3.57 15 0.00 0 0 5 2 0.0 0 0
May 12 4.03 2.06 15 2.06 15 0.00 0 0 10 2 0.0 0 0
June 12 4.00 2.85 21 2.85 21 0.00 0 0 6 0 0.0 0 0
July 12 4.73 2.39 28 2.39 28 0.00 0 0 9 3 0.0 0 0
Aug 12 3.76 5.91 29 5.91 29 0.00 0 0 10 2 0.0 0 0
Sept 12 4.91 6.77 25 6.77 25 0.00 0 0 8 0 0.0 0 0
Water Year Totals: 46.61" 25.59" 159 days 25.59" 159 0.00" 0 days 0 57 days 10 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
10/1/2011
10/2/2011
10/3/2011
10/4/2011
10/5/2011
10/6/2011
10/7/2011
10/8/2011
10/9/2011
10/10/2011
10/11/2011
10/12/2011
10/13/2011
10/14/2011
10/15/2011
10/16/2011
10/17/2011
10/18/2011
10/19/2011
10/20/2011
10/21/2011
10/22/2011
10/23/2011
10/24/2011
10/25/2011
10/26/2011
10/27/2011
10/28/2011
10/29/2011
10/30/2011
10/31/2011
11/1/2011
11/2/2011
11/3/2011
11/4/2011
11/5/2011
11/6/2011
11/7/2011
11/8/2011
11/9/2011
11/10/2011
11/11/2011
11/12/2011
11/13/2011
11/14/2011
11/15/2011
11/16/2011
11/17/2011
11/18/2011
11/19/2011
11/20/2011
11/21/2011
11/22/2011
11/23/2011
11/24/2011
11/25/2011
11/26/2011
11/27/2011
11/28/2011
11/29/2011
11/30/2011
12/1/2011
12/2/2011
12/3/2011
12/4/2011
12/5/2011
12/6/2011
12/7/2011
12/8/2011
12/9/2011
12/10/2011
12/11/2011
12/12/2011
12/13/2011
12/14/2011
12/15/2011
12/16/2011
12/17/2011
12/18/2011
12/19/2011
12/20/2011
12/21/2011
12/22/2011
12/23/2011
12/24/2011
12/25/2011
12/26/2011
12/27/2011
12/28/2011
12/29/2011
12/30/2011
12/31/2011
Day of YearDaily PrcpMultiday Prcp
1/1/2012
1/2/2012
1/3/2012
1/4/2012
1/5/2012
1/6/2012
1/7/2012
1/8/2012
1/9/2012
1/10/2012
1/11/2012
1/12/2012
1/13/2012
1/14/2012
1/15/2012
1/16/2012
1/17/2012
1/18/2012
1/19/2012
1/20/2012
1/21/2012
1/22/2012
1/23/2012
1/24/2012
1/25/2012
1/26/2012
1/27/2012
1/28/2012
1/29/2012
1/30/2012
1/31/2012
2/1/2012
2/2/2012
2/3/2012
2/4/2012
2/5/2012
2/6/2012
2/7/2012
2/8/2012
2/9/2012
2/10/2012
2/11/2012
2/12/2012
2/13/2012
2/14/2012
2/15/2012
2/16/2012
2/17/2012
2/18/2012
2/19/2012
2/20/2012
2/21/2012
2/22/2012
2/23/2012
2/24/2012
2/25/2012
2/26/2012 0.00
2/27/2012
2/28/2012
2/29/2012 0.00
3/1/2012 1.23
3/2/2012 0.02
3/3/2012 0.19
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 0.05
3/14/2012 0.00
3/15/2012 0.00
3/16/2012
3/17/2012 0.01
3/18/2012 T
3/19/2012 0.00
3/20/2012
3/21/2012
3/22/2012
3/23/2012
3/24/2012
3/25/2012 0.14
3/26/2012 0.00
3/27/2012 0.00
3/28/2012 0.00
3/29/2012 0.00
3/30/2012
3/31/2012 0.33
Day of YearDaily PrcpMultiday Prcp
4/1/2012 0.03
4/2/2012 0.17
4/3/2012 0.00
4/4/2012 T
4/5/2012 0.00
4/6/2012 0.00
4/7/2012 0.00
4/8/2012
4/9/2012
4/10/2012
4/11/2012
4/12/2012
4/13/2012 0.00
4/14/2012
4/15/2012
4/16/2012
4/17/2012
4/18/2012
4/19/2012
4/20/2012 T
4/21/2012 0.00
4/22/2012 0.68
4/23/2012 2.66
4/24/2012 0.03
4/25/2012 0.00
4/26/2012 0.00
4/27/2012
4/28/2012
4/29/2012
4/30/2012
5/1/2012
5/2/2012
5/3/2012
5/4/2012
5/5/2012 0.25
5/6/2012 T
5/7/2012
5/8/2012
5/9/2012 0.38
5/10/2012 0.24
5/11/2012 T
5/12/2012
5/13/2012
5/14/2012
5/15/2012
5/16/2012
5/17/2012
5/18/2012
5/19/2012
5/20/2012
5/21/2012 0.26
5/22/2012
5/23/2012 0.01
5/24/2012 0.02
5/25/2012 0.18
5/26/2012 0.00
5/27/2012 0.14
5/28/2012 0.00
5/29/2012 0.00
5/30/2012 0.57
5/31/2012 0.01
6/1/2012 0.00
6/2/2012 1.46
6/3/2012 0.00
6/4/2012 0.09
6/5/2012 0.30
6/6/2012 0.01
6/7/2012 0.00
6/8/2012 0.04
6/9/2012 0.00
6/10/2012 0.00
6/11/2012 0.00
6/12/2012 0.00
6/13/2012 0.95
6/14/2012 0.00
6/15/2012 0.00
6/16/2012 0.00
6/17/2012 0.00
6/18/2012 0.00
6/19/2012 0.00
6/20/2012 0.00
6/21/2012 0.00
6/22/2012
6/23/2012
6/24/2012
6/25/2012
6/26/2012
6/27/2012
6/28/2012
6/29/2012
6/30/2012
Day of YearDaily PrcpMultiday Prcp
7/1/2012
7/2/2012 0.00
7/3/2012 0.00
7/4/2012 0.00
7/5/2012 0.00
7/6/2012 0.00
7/7/2012 0.00
7/8/2012 T
7/9/2012 0.00
7/10/2012 0.02
7/11/2012 0.00
7/12/2012 0.00
7/13/2012
7/14/2012 0.44
7/15/2012 0.05
7/16/2012 0.80
7/17/2012 0.00
7/18/2012 0.00
7/19/2012 T
7/20/2012 0.39
7/21/2012 0.09
7/22/2012 0.00
7/23/2012 0.00
7/24/2012 0.02
7/25/2012 0.00
7/26/2012 0.00
7/27/2012 0.49
7/28/2012 0.00
7/29/2012 T
7/30/2012
7/31/2012 0.09
8/1/2012 0.00
8/2/2012 0.25
8/3/2012 0.00
8/4/2012 T
8/5/2012 0.13
8/6/2012 0.25
8/7/2012 0.00
8/8/2012 0.00
8/9/2012 0.00
8/10/2012 0.00
8/11/2012 0.98
8/12/2012 0.03
8/13/2012 0.00
8/14/2012 0.00
8/15/2012 1.12
8/16/2012 T
8/17/2012 0.00
8/18/2012 1.78
8/19/2012
8/20/2012
8/21/2012 0.05
8/22/2012 0.00
8/23/2012 0.00
8/24/2012 0.00
8/25/2012 0.00
8/26/2012 0.00
8/27/2012 1.15
8/28/2012 0.17
8/29/2012 0.00
8/30/2012 0.00
8/31/2012 0.00
9/1/2012 0.00
9/2/2012 0.00
9/3/2012 2.48
9/4/2012 1.72
9/5/2012 0.02
9/6/2012 0.00
9/7/2012 0.00
9/8/2012
9/9/2012 0.39
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
9/18/2012
9/19/2012 1.52
9/20/2012 0.00
9/21/2012 0.00
9/22/2012 0.00
9/23/2012 0.09
9/24/2012 0.00
9/25/2012
9/26/2012 0.00
9/27/2012 0.46
9/28/2012 0.09
9/29/2012
9/30/2012 0.00



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
2/26/2012 8:00 AM 0.00 0.0 M M M BRIEF PERIOD OF FLURRIES NEAR 1000 TO 1030. NO ACCUMULATED WATER.
2/29/2012 8:00 AM 0.00 0.0 M M M
3/1/2012 8:00 AM 1.23 M M M M FOG STARTED NEAR 0600 OR EARLIER ACCOMPANIED BY DRIZZLE
3/2/2012 8:00 AM 0.02 M M M M
3/3/2012 8:00 AM 0.19 M M M M
3/4/2012 8:00 AM 0.03 M M M M
3/5/2012 8:00 AM 0.00 0.0 M M M No rain; condensation gathering inside tube, though.
3/6/2012 8:00 AM 0.00 0.0 M M M No rain
3/7/2012 8:00 AM 0.00 0.0 M M M
3/8/2012 8:00 AM 0.00 0.0 M M M
3/9/2012 8:00 AM 0.04 M M M M
3/10/2012 8:00 AM 0.00 0.0 M M M
3/11/2012 8:00 AM 0.00 0.0 M M M
3/12/2012 8:00 AM 0.00 0.0 M M M
3/13/2012 8:00 AM 0.05 0.0 M M M Sorry entered erroneous data earlier
3/14/2012 8:00 AM 0.00 0.0 M M M Completely forgot again, sorry
3/15/2012 8:00 AM 0.00 0.0 M M M
3/17/2012 8:00 AM 0.01 M M M M
3/18/2012 8:00 AM T M M M M
3/19/2012 8:00 AM 0.00 0.0 M M M
3/25/2012 8:00 AM 0.14 M M M M Sorry for the absence from submitting data
3/26/2012 8:00 AM 0.00 0.0 M M M
3/27/2012 8:00 AM 0.00 0.0 M M M
3/28/2012 8:00 AM 0.00 0.0 M M M
3/29/2012 8:00 AM 0.00 0.0 M M M
3/31/2012 8:00 AM 0.33 M M M M EVE TSTM.
4/1/2012 8:00 AM 0.03 M M M M
4/2/2012 8:00 AM 0.17 M M M M
4/3/2012 7:30 AM 0.00 0.0 M M M
4/4/2012 8:45 AM T M M M M
4/5/2012 8:00 AM 0.00 0.0 M M M
4/6/2012 8:00 AM 0.00 0.0 M M M
4/7/2012 8:00 AM 0.00 0.0 M M M
4/13/2012 8:00 AM 0.00 0.0 M M M
4/20/2012 10:45 AM T M M M M Apologies for the extended absences from reporting...have been busy
4/21/2012 8:00 AM 0.00 0.0 M M M Exterior of rain gauge completely covered in water droplets, but no accumulation in tube.
4/22/2012 8:00 AM 0.68 M M M M Note that heaviest precip times are only for the time I was awake; tstm passed /w svr tstm warning til 9:15 from 9:00. Strong winds after 9:30 pm EDT
4/23/2012 8:00 AM 2.66 M M M M Steady rain beginning near noon, through evening, becoming heavier throughout the day. Hourly readings were taken 11 am - 7 pm 4/22; 11 am, 0.04"; 12 pm, 0.08"; 1 pm, 0.18"; 2 pm, 0.27"; 3 pm, 0.38"; 4 pm, 0.51"; 5 pm, 0.59"; 6 pm, 0.71"; 7 pm, 0.91". No thunderstorms during time span specified; unknown if any during night.
4/24/2012 8:00 AM 0.03 M M M M
4/25/2012 8:00 AM 0.00 0.0 M M M
4/26/2012 8:00 AM 0.00 0.0 M M M
5/5/2012 8:00 AM 0.25 M M M M Thunderstorm near 2100 - 2230 EDT. Note large precip difference to PA-CH-9/West Chester 2.4 SSE (0.78 in) and PA-CH-11/Unionville 2.2 NE (1.55 in), closer to center of thunderstorm.
5/6/2012 8:00 AM T M M M M
5/9/2012 8:00 AM 0.38 M M M M
5/10/2012 8:00 AM 0.24 M M M M
5/11/2012 8:00 AM T M M M M
5/21/2012 8:00 AM 0.26 M M M M Sorry for the ***long*** absence from reporting - I've been very busy recently.
5/23/2012 8:00 AM 0.01 M M M M
5/24/2012 8:00 AM 0.02 M M M M
5/25/2012 8:00 AM 0.18 M M M M
5/26/2012 8:00 AM 0.00 0.0 M M M
5/27/2012 8:00 AM 0.14 M M M M
5/28/2012 8:00 AM 0.00 0.0 M M M
5/29/2012 8:00 AM 0.00 0.0 M M M
5/30/2012 8:00 AM 0.57 M M M M Rain starting 7:15, tstm starting near 7:25; isolated heavier squalls almost 9. Rain through night.
5/31/2012 8:00 AM 0.01 M M M M
6/1/2012 8:00 AM 0.00 0.0 M M M
6/2/2012 8:00 AM 1.46 M M M M Tornado watch 338; several svr tstm warnings.
6/3/2012 8:00 AM 0.00 0.0 M M M Forgot to submit report -
6/4/2012 8:00 AM 0.09 M M M M
6/5/2012 8:00 AM 0.30 M M M M
6/6/2012 8:00 AM 0.01 M M M M
6/7/2012 8:00 AM 0.00 0.0 M M M
6/8/2012 8:00 AM 0.04 M M M M
6/9/2012 8:00 AM 0.00 0.0 M M M
6/10/2012 8:00 AM 0.00 0.0 M M M
6/11/2012 8:00 AM 0.00 0.0 M M M
6/12/2012 8:00 AM 0.00 0.0 M M M
6/13/2012 8:00 AM 0.95 M M M M At least 0.51" by 1100 EDT. Note large difference to PA-CH-9.
6/14/2012 8:00 AM 0.00 0.0 M M M
6/15/2012 8:00 AM 0.00 0.0 M M M
6/16/2012 8:00 AM 0.00 0.0 M M M
6/17/2012 8:00 AM 0.00 0.0 M M M
6/18/2012 8:00 AM 0.00 0.0 M M M
6/19/2012 8:00 AM 0.00 0.0 M M M
6/20/2012 8:00 AM 0.00 0.0 M M M Note: will be going on vacation on Friday and will not return till July 14. However, neighbor will maintain rain gauge and email readings starting July 1.
6/21/2012 7:30 AM 0.00 0.0 M M M Rain gauge taken out earlier than usual to avoid heat/humidity.
7/2/2012 8:30 AM 0.00 0.0 M M M
7/3/2012 8:30 AM 0.00 0.0 M M M Neighbor maintaining rain gauge -
7/4/2012 8:30 AM 0.00 0.0 M M M
7/5/2012 8:00 AM 0.00 0.0 M M M See 7/2 report.
7/6/2012 8:00 AM 0.00 0.0 M M M See 7/2 comment.
7/7/2012 8:00 AM 0.00 0.0 M M M See 7/2 comment.
7/8/2012 8:00 AM T M M M M See 7/2 comment.
7/9/2012 8:00 AM 0.00 0.0 M M M See 7/2 comment
7/10/2012 8:00 AM 0.02 M M M M See 7/2 comment.
7/11/2012 8:00 AM 0.00 0.0 M M M
7/12/2012 8:00 AM 0.00 0.0 M M M see 7/2 comment
7/14/2012 8:00 AM 0.44 M M M M see 7/2 comment - FINAL report from neighbor
7/15/2012 8:00 AM 0.05 M M M M back
7/16/2012 8:00 AM 0.80 M M M M Thunderstorm near 9:00 pm.
7/17/2012 8:00 AM 0.00 0.0 M M M
7/18/2012 8:00 AM 0.00 0.0 M M M
7/19/2012 8:00 AM T M M M M No precipitation in rain gauge, though a bit of rain did fall.
7/20/2012 8:00 AM 0.39 M M M M Drizzling while taking out rain gauge; no thunder since previous day's report.
7/21/2012 8:00 AM 0.09 M M M M
7/22/2012 8:00 AM 0.00 0.0 M M M
7/23/2012 8:00 AM 0.00 0.0 M M M
7/24/2012 8:00 AM 0.02 M M M M Thunderstorms weakening during afternoon.
7/25/2012 8:00 AM 0.00 0.0 M M M
7/26/2012 7:30 AM 0.00 0.0 M M M
7/27/2012 8:00 AM 0.49 M M M M Many thunderstorms during evening, starting ~7pm.
7/28/2012 8:00 AM 0.00 0.0 M M M
7/29/2012 8:00 AM T M M M M
7/31/2012 8:00 AM 0.09 M M M M
8/1/2012 8:00 AM 0.00 0.0 M M M
8/2/2012 8:00 AM 0.25 M M M M
8/3/2012 8:00 AM 0.00 0.0 M M M
8/4/2012 8:15 AM T M M M M
8/5/2012 8:15 AM 0.13 M M M M See SWR
8/6/2012 8:00 AM 0.25 M M M M
8/7/2012 8:00 AM 0.00 0.0 M M M
8/8/2012 8:00 AM 0.00 0.0 M M M
8/9/2012 8:00 AM 0.00 0.0 M M M
8/10/2012 8:00 AM 0.00 0.0 M M M
8/11/2012 8:00 AM 0.98 M M M M Unusually heavy rain during morning. Nearby rail tracks were partially inundated. Unusual street flooding in immediate area.
8/12/2012 8:00 AM 0.03 M M M M
8/13/2012 8:00 AM 0.00 0.0 M M M
8/14/2012 8:00 AM 0.00 0.0 M M M
8/15/2012 8:00 AM 1.12 M M M M
8/16/2012 8:00 AM T M M M M
8/17/2012 8:00 AM 0.00 0.0 M M M
8/18/2012 7:20 AM 1.78 M M M M Numerous tstms during evening.
8/21/2012 8:00 AM 0.05 M M M M
8/22/2012 8:00 AM 0.00 0.0 M M M
8/23/2012 8:00 AM 0.00 0.0 M M M
8/24/2012 8:00 AM 0.00 0.0 M M M
8/25/2012 8:00 AM 0.00 0.0 M M M
8/26/2012 8:00 AM 0.00 0.0 M M M
8/27/2012 10:50 AM 1.15 M M M M
8/28/2012 8:00 AM 0.17 M M M M Morning showers.
8/29/2012 8:00 AM 0.00 0.0 M M M
8/30/2012 8:00 AM 0.00 0.0 M M M
8/31/2012 8:00 AM 0.00 0.0 M M M
9/1/2012 8:00 AM 0.00 0.0 M M M
9/2/2012 8:00 AM 0.00 0.0 M M M
9/3/2012 8:00 AM 2.48 M M M M Steady rain throughout the day.
9/4/2012 7:30 AM 1.72 M M M M On-and-off rain throughout the day.
9/5/2012 8:00 AM 0.02 M M M M
9/6/2012 8:00 AM 0.00 0.0 M M M
9/7/2012 7:30 AM 0.00 0.0 M M M
9/9/2012 8:00 AM 0.39 M M M M
9/10/2012 8:00 AM 0.00 0.0 M M M
9/11/2012 8:00 AM 0.00 0.0 M M M
9/12/2012 8:00 AM 0.00 0.0 M M M
9/13/2012 8:00 AM 0.00 0.0 M M M
9/14/2012 8:00 AM 0.00 0.0 M M M
9/15/2012 8:00 AM 0.00 0.0 M M M
9/16/2012 8:00 AM 0.00 0.0 M M M
9/19/2012 8:00 AM 1.52 M M M M Extremely heavy rain at times
9/20/2012 7:45 AM 0.00 0.0 M M M
9/21/2012 7:30 AM 0.00 0.0 M M M
9/22/2012 8:00 AM 0.00 0.0 M M M
9/23/2012 8:00 AM 0.09 M M M M Heavier rain stayed to south.
9/24/2012 7:00 AM 0.00 0.0 M M M
9/26/2012 7:30 AM 0.00 0.0 M M M
9/27/2012 8:00 AM 0.46 M M M M
9/28/2012 8:00 AM 0.09 M M M M
9/30/2012 8:00 AM 0.00 0.0 M M M missing rpt period



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