Station Overview Station Location
Station Number PA-AL-20 Latitude 40.561042
Station Name Allison Park 0.7 W Longitude -79.970761
County Allegheny Elevation (ft) 1048



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 09 2.48 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Nov 09 3.32 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Dec 09 2.96 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Jan 10 2.79 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Feb 10 2.44 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
March 10 2.97 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
April 10 3.26 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
May 10 4.04 0.08 6 0.08 6 0.00 0 0 1 0 0.0 0 0
June 10 3.92 5.70 30 4.71 28 0.99 2 1 13 6 0.0 0 0
July 10 3.88 2.55 31 2.55 31 0.00 0 0 11 6 0.0 0 0
Aug 10 3.40 2.77 31 2.77 31 0.00 0 0 9 6 0.0 0 0
Sept 10 3.43 4.24 30 4.24 30 0.00 0 0 9 5 0.0 0 0
Water Year Totals: 38.89" 15.34" 128 days 14.35" 126 0.99" 2 days 1 43 days 23 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
10/1/2009
10/2/2009
10/3/2009
10/4/2009
10/5/2009
10/6/2009
10/7/2009
10/8/2009
10/9/2009
10/10/2009
10/11/2009
10/12/2009
10/13/2009
10/14/2009
10/15/2009
10/16/2009
10/17/2009
10/18/2009
10/19/2009
10/20/2009
10/21/2009
10/22/2009
10/23/2009
10/24/2009
10/25/2009
10/26/2009
10/27/2009
10/28/2009
10/29/2009
10/30/2009
10/31/2009
11/1/2009
11/2/2009
11/3/2009
11/4/2009
11/5/2009
11/6/2009
11/7/2009
11/8/2009
11/9/2009
11/10/2009
11/11/2009
11/12/2009
11/13/2009
11/14/2009
11/15/2009
11/16/2009
11/17/2009
11/18/2009
11/19/2009
11/20/2009
11/21/2009
11/22/2009
11/23/2009
11/24/2009
11/25/2009
11/26/2009
11/27/2009
11/28/2009
11/29/2009
11/30/2009
12/1/2009
12/2/2009
12/3/2009
12/4/2009
12/5/2009
12/6/2009
12/7/2009
12/8/2009
12/9/2009
12/10/2009
12/11/2009
12/12/2009
12/13/2009
12/14/2009
12/15/2009
12/16/2009
12/17/2009
12/18/2009
12/19/2009
12/20/2009
12/21/2009
12/22/2009
12/23/2009
12/24/2009
12/25/2009
12/26/2009
12/27/2009
12/28/2009
12/29/2009
12/30/2009
12/31/2009
Day of YearDaily PrcpMultiday Prcp
1/1/2010
1/2/2010
1/3/2010
1/4/2010
1/5/2010
1/6/2010
1/7/2010
1/8/2010
1/9/2010
1/10/2010
1/11/2010
1/12/2010
1/13/2010
1/14/2010
1/15/2010
1/16/2010
1/17/2010
1/18/2010
1/19/2010
1/20/2010
1/21/2010
1/22/2010
1/23/2010
1/24/2010
1/25/2010
1/26/2010
1/27/2010
1/28/2010
1/29/2010
1/30/2010
1/31/2010
2/1/2010
2/2/2010
2/3/2010
2/4/2010
2/5/2010
2/6/2010
2/7/2010
2/8/2010
2/9/2010
2/10/2010
2/11/2010
2/12/2010
2/13/2010
2/14/2010
2/15/2010
2/16/2010
2/17/2010
2/18/2010
2/19/2010
2/20/2010
2/21/2010
2/22/2010
2/23/2010
2/24/2010
2/25/2010
2/26/2010
2/27/2010
2/28/2010
3/1/2010
3/2/2010
3/3/2010
3/4/2010
3/5/2010
3/6/2010
3/7/2010
3/8/2010
3/9/2010
3/10/2010
3/11/2010
3/12/2010
3/13/2010
3/14/2010
3/15/2010
3/16/2010
3/17/2010
3/18/2010
3/19/2010
3/20/2010
3/21/2010
3/22/2010
3/23/2010
3/24/2010
3/25/2010
3/26/2010
3/27/2010
3/28/2010
3/29/2010
3/30/2010
3/31/2010
Day of YearDaily PrcpMultiday Prcp
4/1/2010
4/2/2010
4/3/2010
4/4/2010
4/5/2010
4/6/2010
4/7/2010
4/8/2010
4/9/2010
4/10/2010
4/11/2010
4/12/2010
4/13/2010
4/14/2010
4/15/2010
4/16/2010
4/17/2010
4/18/2010
4/19/2010
4/20/2010
4/21/2010
4/22/2010
4/23/2010
4/24/2010
4/25/2010
4/26/2010
4/27/2010
4/28/2010
4/29/2010
4/30/2010
5/1/2010
5/2/2010
5/3/2010
5/4/2010
5/5/2010
5/6/2010
5/7/2010
5/8/2010
5/9/2010
5/10/2010
5/11/2010
5/12/2010
5/13/2010
5/14/2010
5/15/2010
5/16/2010
5/17/2010
5/18/2010
5/19/2010
5/20/2010
5/21/2010
5/22/2010
5/23/2010
5/24/2010
5/25/2010
5/26/2010 0.00
5/27/2010 0.00
5/28/2010 0.00
5/29/2010 0.08
5/30/2010 0.00
5/31/2010 0.00
6/1/2010 1.56
6/2/2010 0.00
6/3/2010 0.43
6/4/2010 0.05
6/5/2010 0.48
6/6/2010 0.34
6/7/2010 0.05
6/8/2010 T
6/9/2010 **
6/10/2010 0.99
6/11/2010 0.00
6/12/2010 T
6/13/2010 0.01
6/14/2010 T
6/15/2010 0.01
6/16/2010 0.10
6/17/2010 0.00
6/18/2010 0.00
6/19/2010 0.00
6/20/2010 0.80
6/21/2010 0.00
6/22/2010 0.00
6/23/2010 0.26
6/24/2010 0.40
6/25/2010 T
6/26/2010 0.00
6/27/2010 0.00
6/28/2010 T
6/29/2010 0.22
6/30/2010 T
Day of YearDaily PrcpMultiday Prcp
7/1/2010 0.00
7/2/2010 0.00
7/3/2010 0.00
7/4/2010 0.00
7/5/2010 0.00
7/6/2010 0.00
7/7/2010 0.00
7/8/2010 0.00
7/9/2010 0.00
7/10/2010 0.86
7/11/2010 0.00
7/12/2010 0.00
7/13/2010 T
7/14/2010 0.16
7/15/2010 T
7/16/2010 T
7/17/2010 T
7/18/2010 0.01
7/19/2010 T
7/20/2010 0.26
7/21/2010 0.01
7/22/2010 0.08
7/23/2010 T
7/24/2010 0.02
7/25/2010 0.36
7/26/2010 0.43
7/27/2010 0.00
7/28/2010 0.00
7/29/2010 0.11
7/30/2010 0.25
7/31/2010 0.00
8/1/2010 T
8/2/2010 T
8/3/2010 0.03
8/4/2010 0.04
8/5/2010 0.13
8/6/2010 T
8/7/2010 0.02
8/8/2010 0.00
8/9/2010 0.00
8/10/2010 T
8/11/2010 0.00
8/12/2010 0.01
8/13/2010 0.00
8/14/2010 0.00
8/15/2010 1.96
8/16/2010 T
8/17/2010 0.00
8/18/2010 0.00
8/19/2010 0.00
8/20/2010 0.00
8/21/2010 0.00
8/22/2010 0.50
8/23/2010 0.02
8/24/2010 0.06
8/25/2010 0.00
8/26/2010 T
8/27/2010 0.00
8/28/2010 0.00
8/29/2010 0.00
8/30/2010 0.00
8/31/2010 0.00
9/1/2010 0.00
9/2/2010 0.00
9/3/2010 0.00
9/4/2010 0.23
9/5/2010 0.00
9/6/2010 0.00
9/7/2010 0.00
9/8/2010 0.03
9/9/2010 0.00
9/10/2010 0.00
9/11/2010 0.00
9/12/2010 0.09
9/13/2010 T
9/14/2010 T
9/15/2010 0.00
9/16/2010 0.00
9/17/2010 0.78
9/18/2010 T
9/19/2010 0.02
9/20/2010 T
9/21/2010 0.00
9/22/2010 0.00
9/23/2010 0.89
9/24/2010 0.00
9/25/2010 T
9/26/2010 0.00
9/27/2010 0.00
9/28/2010 2.06
9/29/2010 0.02
9/30/2010 0.12



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
5/26/2010 7:00 AM 0.00 0.0 M 0.0 M
5/27/2010 7:00 AM 0.00 0.0 M 0.0 M
5/28/2010 7:00 AM 0.00 0.0 M 0.0 M
5/29/2010 7:00 AM 0.08 0.0 M 0.0 M Rain accumulated 0.07in between 5:08pm and 5:32pm. Thundered between 5:00pm and 6:40pm. A few sprinkles in the 6:00pm hour.
5/30/2010 7:00 AM 0.00 0.0 M 0.0 M
5/31/2010 7:00 AM 0.00 0.0 M 0.0 M
6/1/2010 7:00 AM 1.56 0.0 M 0.0 M Storm 1: rain accumulated T between 1:40pm and 1:43pm. Storm 2: rain accumulated 0.01in off and on between 2:18pm and 2:38pm. Storm 3: rain accumulated T between 6:20pm and 6.25pm. Storm cluster (4): rain accumulated >1.00in between 8:00pm and 10:00pm. Likely additional precip accumulated from a few showers overnight. Thundered occasionally between 1:30 and 10:30pm.
6/2/2010 7:00 AM 0.00 0.0 M 0.0 M
6/3/2010 7:00 AM 0.43 0.0 M 0.0 M Storm 1: rain accumulated 0.02in between 4:12pm and 4:35pm. Storm cluster (2): rain accumulated 0.16in between 7:15pm and 8:55pm. A line of storms with rain behind it (3): rain accumulated 0.24in between 10:48pm and 4.00am (estimated time). Thundered between 3:45pm and 5:00pm, 6:30pm and 9:15pm, & 10:20pm and 12:00am.
6/4/2010 7:00 AM 0.05 0.0 M 0.0 M Rain accumulated 0.05in between 3:35pm and 3:50pm.
6/5/2010 7:00 AM 0.48 0.0 M 0.0 M A few showers between 2:30pm and 5:00pm accumulated 0.03in. Storm: rain accumulated 0.03in between 6:45pm and 9:00pm, with a short break in the rain between 8:10pm and about 8:20pm. Overnight storms: rain accumulated 0.41in between 2:00am and 7:00am. Thundered occasionally in the late afternoon, early evening, and after 2:00am. Light rain observed at 7:00am.
6/6/2010 7:00 AM 0.34 0.0 M 0.0 M Storm 1: rain accumulated 0.04in between 7:00am and 8:00am (estimated time). A few showers between 11:00am and 12:30pm accumulated T of rain. Storm 2: rain accumulated 0.02in between 12:45pm and 1:00pm. Storm 3: rain accumulated 0.27in between 3:30pm and 5:20pm. A few showers in the evening accumulated T of rain. Thundered around 7:00am and part of the afternoon after 1:00pm.
6/7/2010 7:00 AM 0.05 0.0 M 0.0 M Areas of showers and storms: rain accumulated 0.03in between 7:05am and 11:00am with very little thunder. Some scattered showers in the afternoon accumulated T of rain. It was quite windy throughout the day and as a result, some small branches were taken down in the late morning hours of June 6th. Another area of showers accumulated 0.01in between 10:50pm and 12:00am. Sprinkles continued after midnight.
6/8/2010 7:00 AM T 0.0 M 0.0 M A brief shower just after 7:00am on June 7th accumulated T of rain.
6/11/2010 7:00 AM 0.00 0.0 M 0.0 M
6/12/2010 6:00 AM T 0.0 M 0.0 M Brief showers in the late morning and early afternoon hours.
6/13/2010 7:00 AM 0.01 0.0 M 0.0 M Brief showers in the late morning and early afternoon hours. A more concentrated area of rain fell overnight.
6/14/2010 7:00 AM T 0.0 M 0.0 M Brief showers in the late morning, early afternoon and evening hours.
6/15/2010 7:00 AM 0.01 0.0 M 0.0 M Late morning and early afternoon showers. A few drops fell between 6:00am and 7:00am with an area of scattered showers. Sprinkles were observed at 7:00am.
6/16/2010 7:00 AM 0.10 0.0 M 0.0 M An area of scattered showers in the late morning, followed by a few sprinkles overnight.
6/17/2010 7:00 AM 0.00 0.0 M 0.0 M
6/18/2010 7:00 AM 0.00 0.0 M 0.0 M
6/19/2010 7:00 AM 0.00 0.0 M 0.0 M
6/20/2010 7:00 AM 0.80 0.0 M 0.0 M Rain accumulated 0.80 between 5:40pm and 7:05pm. Thundered between 5:00pm and 7:00pm. Additionally there was a brief shower overnight.
6/21/2010 7:00 AM 0.00 0.0 M 0.0 M
6/22/2010 7:00 AM 0.00 0.0 M 0.0 M
6/23/2010 7:00 AM 0.26 0.0 M 0.0 M A line of showers and thunderstorms accumulated 0.26 inches between 7:40am and 9:30am. Thundered between 7:00am and 9:00am.
6/24/2010 7:00 AM 0.40 0.0 M 0.0 M A line of thunderstorms and showers accumulated 0.40 in of rain between 5:50pm and 8:00pm. Most of the rain accumulated as the bow echo came through between 5:50pm and 6:10pm. There was a power outage that lasted roughly half an hour. A few small branches snapped off during the initial few gusts of wind. Thundered between 5:00pm and 7:30pm.
6/25/2010 7:00 AM T 0.0 M 0.0 M A few showers between 11:00am and 12:30pm accumulated T of rain.
6/26/2010 7:00 AM 0.00 0.0 M 0.0 M
6/27/2010 7:00 AM 0.00 0.0 M 0.0 M
6/28/2010 7:00 AM T 0.0 M 0.0 M A few sprinkles and rumbles of thunder in the 3:00pm and 6:00pm hours. Passing showers in the overnight hours after 1:00am.
6/29/2010 7:00 AM 0.22 0.0 M 0.0 M Scattered showers in the late morning and early afternoon accumulated 0.22in of rain. A line of showers, with some thunder, accumulated T of rain in the 7:00pm hour.
6/30/2010 7:00 AM T 0.0 M 0.0 M I am not sure when it rained. Likely during the late morning of June 29th.
7/1/2010 7:00 AM 0.00 0.0 M 0.0 M
7/2/2010 7:00 AM 0.00 0.0 M 0.0 M
7/3/2010 5:00 AM 0.00 0.0 M 0.0 M
7/4/2010 7:00 AM 0.00 0.0 M 0.0 M
7/5/2010 7:00 AM 0.00 0.0 M 0.0 M
7/6/2010 7:00 AM 0.00 0.0 M 0.0 M
7/7/2010 7:00 AM 0.00 0.0 M 0.0 M
7/8/2010 7:00 AM 0.00 0.0 M 0.0 M
7/9/2010 7:00 AM 0.00 0.0 M 0.0 M
7/10/2010 7:00 AM 0.86 0.0 M 0.0 M Thundered around 1:30pm and continued, but lessened in frequency, up until 6:00pm. A few drops of rain began to fall at 2:40pm ending a 245 hour stretch without a drop of rain. The heaviest rain fell between 4:45pm and 5:25pm which accumulated 0.50in. The intensity of the rain lessened after the Significant Weather Report was issued at 5:31pm. Precipitation tapered off around 8:45pm.
7/11/2010 7:00 AM 0.00 0.0 M 0.0 M
7/12/2010 7:00 AM 0.00 0.0 M 0.0 M
7/13/2010 7:00 AM T 0.0 M 0.0 M A few sprinkles around noon and a few in the late afternoon.
7/14/2010 7:00 AM 0.16 0.0 M 0.0 M A few drops, associated with a large area of slow moving showers, began to fall in the 6:00pm hour. This light precipitation continued into the overnight with a few rumbles of thunder.
7/15/2010 7:00 AM T 0.0 M 0.0 M A few drops fell from brief showers in the 2:00pm and 4:00pm hours.
7/16/2010 7:00 AM T 0.0 M 0.0 M A few drops fell from a brief shower in the 6:00am hour.
7/17/2010 7:00 AM T 0.0 M 0.0 M A few drops fell in the 10:00am hour.
7/18/2010 7:00 AM 0.01 0.0 M 0.0 M A few rumbles of thunder between 5:45 and 6:00pm preceded a brief shower around 6:00pm.
7/19/2010 7:00 AM T 0.0 M 0.0 M A few showers between 11:40pm and 12:30am.
7/20/2010 7:00 AM 0.26 0.0 M 0.0 M A few sprinkles in the 1:00pm hour and a brief shower in the 6:00pm hour. A shower accumulated 0.26in of rain between 6:05am and 6:18am. This shower had a rainfall rate of 1.20in/hr.
7/21/2010 7:00 AM 0.01 0.0 M 0.0 M A few showers in the late morning.
7/22/2010 7:00 AM 0.08 0.0 M 0.0 M Thundered a little in the late afternoon. A thundershower accumulated 0.08in of rain between 9:50pm and 10:03pm.
7/23/2010 7:00 AM T 0.0 M 0.0 M An area of light showers arrived around 11:15pm and continued to roughly 12:30am.
7/24/2010 7:00 AM 0.02 0.0 M 0.0 M Distant lightning observed to the northwest around 10:30pm. Rumbles of thunder in the 11:00pm hour faded away through the overnight. Raindrops began to fall at 1:48am then became more concentrated 2:20am through roughly 4:00am.
7/25/2010 7:00 AM 0.36 0.0 M 0.0 M Non-thunderstorm wind gusts in the afternoon hours were high enough to tip over a few potted plants. Began to hear rumbles of thunder after 8:00pm. A thunderstorm associated with a line of showers & storms accumulated 0.32in of rain between 9:20pm and 9:45pm. Intermittent showers between 9:55pm and Midnight accumulated 0.02in of rain. Intermittent showers with embedded thunder, mainly from the storm in Southern Allegheny County, continued after midnight accumulating an additional 0.02in of rain.
7/26/2010 7:00 AM 0.43 0.0 M 0.0 M 0.40in of rain accumulated between roughly 10:25am and 11:15am from a series of rain showers. The first shower was the heaviest, which likely accumulated about 0.38in of rain, followed by a brief shower and a third shower, which was ongoing at the time of the measurement. Ongoing light rain showers, with brief breaks, continued through 1:15pm accumulating an additional 0.03in of rain. Some thunder after 11:00am accompanied the first intensifying shower. Minor flooding in poor drainage areas on some roads, likely from excessive runoff, was observed on the commute home from church in the 11:00am hour.
7/27/2010 7:00 AM 0.00 0.0 M 0.0 M
7/28/2010 7:00 AM 0.00 0.0 M 0.0 M
7/29/2010 7:00 AM 0.11 0.0 M 0.0 M Raindrops, associated with a thunderstorm that lifted to our north, began to fall at 8:45pm accumulating 0.01in through 9:20pm. A few sprinkles around 10:15pm preceded a thunderstorm, which accumulated 0.08in of rain between 10:32pm and 10:52pm. An area of scattered showers from 11:00pm through Midnight accumulated 0.01in of rain. Thundered around 8:30pm through 11:00pm and some thunder in the 1:00am hour.
7/30/2010 7:00 AM 0.25 0.0 M 0.0 M Thundered in the 7:00am hour. 0.25in of rain, from a shower, accumulated between 7:27am and 7:47am.
7/31/2010 7:00 AM 0.00 0.0 M 0.0 M
8/1/2010 7:00 AM T 0.0 M 0.0 M A few, barely noticeable, drops fell around 7:00pm.
8/2/2010 6:00 AM T 0.0 M 0.0 M A few drops fell in the 1:00pm and 3:00pm hours.
8/3/2010 7:00 AM 0.03 0.0 M 0.0 M An area of showers accumulated 0.03in of rain between roughly 5:20pm and 6:00pm.
8/4/2010 7:00 AM 0.04 0.0 M 0.0 M A few showers in the 8:00am and 9:00am hours. A line of showers between 2:05pm and 2:25pm. Raindrops from a shower, on the northern edge of a line of showers, fell between 5:28pm and 5:40pm. A few sprinkles in the 6:00pm hour. A line of showers between 7:24pm and 8:00pm.
8/5/2010 7:00 AM 0.13 0.0 M 0.0 M An area of showers, behind a group of thunderstorms, accumulated 0.09in of rain between 4:56pm and roughly 7:00pm. Frequent thunder from these nearby storms was observed in the 4:00pm, 5:00pm and 6:00pm hours. Rain from an area of showers accumulated 0.04in between 3:05am and roughly 5:00am.
8/6/2010 7:00 AM T 0.0 M 0.0 M A brief shower around 10:00am. A few sprinkles in the 12:00am hour, mainly from a shower between 11:58pm and 12:04am.
8/7/2010 7:00 AM 0.02 0.0 M 0.0 M A few instability showers accumulated 0.02in of rain between 3:30pm and 4:15pm.
8/8/2010 7:00 AM 0.00 0.0 M 0.0 M
8/9/2010 7:00 AM 0.00 0.0 M 0.0 M
8/10/2010 7:00 AM T 0.0 M 0.0 M A few drops fell in the 6:00am hour.
8/11/2010 7:00 AM 0.00 0.0 M 0.0 M
8/12/2010 6:00 AM 0.01 0.0 M 0.0 M CAUTION: 24-HOUR GAUGE AMOUNT ERROR IS BETWEEN 0.00IN AND 0.02IN OF RAIN. Thundered from 11:30pm through parts of the overnight. A brief shower between roughly 12:52am and 12:57am accumulated roughly a T of rain. The amount from the shower is a best estimate and could range from a T to 0.02 based the Digital Storm Precipitation product from the KPBZ radar and visual observation of the shower. A check of the gauge at 1:45am revealed that the gauge was entirely knocked over, likely from deer, but was resituated for further accurate measurements. Additional showers that clipped the area from 2:00am through 3:30am accumulated T of rain.
8/13/2010 7:00 AM 0.00 0.0 M 0.0 M
8/14/2010 7:00 AM 0.00 0.0 M 0.0 M
8/15/2010 7:00 AM 1.96 0.0 M 0.0 M Continuous rainfall from a thunderstorm, followed by a line of thunderstorms, accumulated over 1.00in of rain between 8:10pm and 9:20pm. An area of showers behind the line of storms continued to accumulate an additional light rain between 9:20pm and 10:40pm. Overall, 1.96in of rain fell between 8:10pm and 10:40pm. According to radar reflectivity and visual observation of the rain, the heaviest rain fell between 8:30pm and 9:10pm. It thundered in the 8:00pm and 9:00pm hours. A significant weather report was also issued concerning the heavy rain in the span of 150 minutes (An error was made in the report and it should read 1.96 instead of 2.01).
8/16/2010 7:00 AM T 0.0 M 0.0 M Intermittent drizzle in the 10:00am hour.
8/17/2010 7:00 AM 0.00 0.0 M 0.0 M
8/18/2010 7:00 AM 0.00 0.0 M 0.0 M
8/19/2010 7:00 AM 0.00 0.0 M 0.0 M
8/20/2010 7:00 AM 0.00 0.0 M 0.0 M
8/21/2010 7:00 AM 0.00 0.0 M 0.0 M
8/22/2010 7:00 AM 0.50 0.0 M 0.0 M A few sprinkles in the 5:00pm and 6:00pm hours. A shower accumulated 0.11in of rain between 6:52pm and 7:20pm. A large area of light showers between 7:40pm and Midnight accumulated 0.30in of rain. Additional but lighter showers followed suit after midnight and accumulated 0.08in of rain before tapering off around 1:00am. After 1:00am additional sprinkles may have fallen through the overnight, especially around 6:50am when a heavy mist was observed.
8/23/2010 7:00 AM 0.02 0.0 M 0.0 M Light showers and drizzle continued in the 7:00am and 8:00am hours accumulating 0.02in of rain. A brief shower also occurred around 12:20am. It is likely that light rain or drizzle continued through the overnight.
8/24/2010 7:00 AM 0.06 0.0 M 0.0 M Intermittent shower activity occurred predominantly between 10:00am to 6:00pm.
8/25/2010 5:00 AM 0.00 0.0 M 0.0 M
8/26/2010 7:00 AM T 0.0 M 0.0 M A few afternoon sprinkles and showers, most notably around 2:45pm when a light shower lasted a couple of minutes. Another shower clipped the area bringing a few drops of rain around 9:00pm and a final brief shower appeared at about 1:00am.
8/27/2010 7:00 AM 0.00 0.0 M 0.0 M
8/28/2010 7:00 AM 0.00 0.0 M 0.0 M
8/29/2010 7:00 AM 0.00 0.0 M 0.0 M
8/30/2010 7:00 AM 0.00 0.0 M 0.0 M
8/31/2010 7:00 AM 0.00 0.0 M 0.0 M
9/1/2010 7:00 AM 0.00 0.0 M 0.0 M
9/2/2010 7:00 AM 0.00 0.0 M 0.0 M 100th day of existence for this CoCoRaHS station!
9/3/2010 7:00 AM 0.00 0.0 M 0.0 M
9/4/2010 7:00 AM 0.23 0.0 M 0.0 M A few sprinkles were noted in the 2:00pm hour ahead of a line of showers. Then the majority of rain, associated with the line, accumulated 0.23in of rain beteen roughly 3:25pm and 4:25pm. Due to prior commitments, thunder was not heard, but likely occurred near the CocoRaHS station. Many small branches, leaves and twigs were down on nearby roads.
9/5/2010 7:00 AM 0.00 0.0 M 0.0 M
9/6/2010 7:00 AM 0.00 0.0 M 0.0 M
9/7/2010 7:00 AM 0.00 0.0 M 0.0 M
9/8/2010 7:00 AM 0.03 0.0 M 0.0 M Light rain associated with a thunderstorm accumulated 0.01in between 9:07pm and 9:35pm. Afterwards, a few raindrops fell in the 9:00pm and 10:00pm hours before ahead of an additional area of scattered showers and thunderstorms arrived around 11:00pm. Between 11:05pm and about 11:25pm, 0.01in of rain accumulated with two areas of showers. Three brief showers around 11:30pm, 11:48pm and 12:22am accumulated a trace of rain. It thundered in the 8:00pm, 9:00pm, 10:00pm and 11:00pm hours.
9/9/2010 7:00 AM 0.00 0.0 M 0.0 M
9/10/2010 7:00 AM 0.00 0.0 M 0.0 M
9/11/2010 7:00 AM 0.00 0.0 M 0.0 M
9/12/2010 7:00 AM 0.09 0.0 M 0.0 M Rain began to fall around 8:50pm and accumulated 0.05in through 9:52pm. Thunder was not noted, but still may have occurred. Sprinkles continued into the 10:00pm hour, followed by an area of light rain and drizzle around 10:40pm. Drizzle and light precipitation was observed just after midnight and likely continued through much of the night. Around 2:30am, a brief band of rain moved through and was likely associated with the front. All the rain after midnight accumulated 0.03in.
9/13/2010 7:00 AM T 0.0 M 0.0 M A few raindrops fell just after 7:00am.
9/14/2010 7:00 AM T 0.0 M 0.0 M As determined by radar, a shower between 7:25am and 7:35am and another brief shower around 9:15am accumulated a T of rain.
9/15/2010 7:00 AM 0.00 0.0 M 0.0 M
9/16/2010 7:00 AM 0.00 0.0 M 0.0 M
9/17/2010 7:00 AM 0.78 0.0 M 0.0 M Two bands of showers came through between roughly 7:45am and 8:20am. A large expanse of rain arrived around 9:15am and lasted until 11:33am. Between 7:45am and 11:33am, 0.27in of rain accumulated. It is likely that 0.02in of that rain had accumulated between 7:45am and 8:20am, according to the 9:00am report of 0.02in from the nearby CoCoRaHS station located 1.3 miles NW of Glenshaw. A large area of light showers came through between 1:45pm and 4:20pm, followed by another shower between 5:00pm and 5:15pm, a shower between 5:35pm and 5:50pm, and two brief showers between 6:05pm and 6:30pm. These afternoon showers accumulated 0.15in of rain. By 7:00pm, rain began to fall again with some embedded thunder. The rain had stopped falling around 8:45pm and had accumulated 0.36in in that span of time. Distant lightning was still visible into the 9:00pm hour.
9/18/2010 7:00 AM T 0.0 M 0.0 M A few sprinkles in the morning hours of September 17th.
9/19/2010 7:00 AM 0.02 0.0 M 0.0 M A shower arrived at 12:38am accumulated 0.01in of rain through roughly 12:55am. A few showers in the 5:00am hour accumulated a trace of rain.
9/20/2010 7:00 AM T 0.0 M 0.0 M Two brief showers in the 8:00am and 9:00am hours were followed by a longer lived shower from 10:02am to 10:15am. Another brief shower occurred around 5:45pm.
9/21/2010 7:00 AM 0.00 0.0 M 0.0 M
9/22/2010 7:00 AM 0.00 0.0 M 0.0 M
9/23/2010 7:00 AM 0.89 0.0 M 0.0 M A few sprinkles fell from a passing shower that clipped our area around 11:00am. Thunder was heard in the 2:00pm, 3:00pm, 4:00pm and 5:00pm hours. Between 2:58pm and 3:10pm, 0.27 inches of rain fell with the first thunderstorm. Hail was also observed with the first storm. A hail report was issued and stated, "Rice to Pea sized (0.25in) hail fell between 3:01pm and 3:02pm. The hail lessened briefly but then from 3:03pm to 3:04pm, the hail approached 0.50in (estimated 0.375in) in size." The second thunderstorm began to accumulate rain between about 3:15pm and 3:30pm. Another hail report was issued and stated, "The second storm had brief rice sized hail. The hail only lasted about 15 seconds and only a few pellets were observed." A third thunderstorm started minutes later and accumulated more rain starting around 3:30pm. Additional storms trained behind and blended together with the third storm. The rain lasted until 4:55pm. Because of the numerous lightning strikes with the second thunderstorm, I was unable to take a rainfall measurement during that brief break. Rain accumulated 0.61in between 3:15pm and 4:56pm. Also a few drops may have fallen after midnight.
9/24/2010 7:00 AM 0.00 0.0 M 0.0 M
9/25/2010 7:00 AM T 0.0 M 0.0 M A non thunderstorm wind gust of 40mph (estimated) briefly shut off power at 2:00pm. I also managed to hear three large potted plants fall over with this gust. A few sprinkles associated with an area of showers were first observed around 11:40pm. The raindrops, intermittent at times, gradually ended around 12:20am.
9/26/2010 7:00 AM 0.00 0.0 M 0.0 M
9/27/2010 7:00 AM 0.00 0.0 M 0.0 M
9/28/2010 7:00 AM 2.06 0.0 M 0.0 M From 7:00 through 3:00pm, 0.37in of rain fell from an area of rain. A few raindrops were noted in the 12:00am and 1:00am hours before a solid shield of rain began to fall around 2:05am. This rain continued to fall and became heavier in the 4:00am hour. The rain had stopped around 6:15am, and had accumulated 1.69in since 2:05am.
9/29/2010 7:00 AM 0.02 0.0 M 0.0 M Most of the 0.02in of rain came from a shower in the 7:00am and 8:00am hours. Additionally, there were occassional sprinkles and drizzle throughout much of the afternoon.
9/30/2010 9:00 AM 0.12 0.0 M 0.0 M It appears the rain began a little before 5:00am in the 4:00am hour as the precipitation nudged westward. All this rain is a result of southeasterly flow being drawn north of an upper level low, which accumulated 0.12in through 9:00am.



Start Date End Date & Time Duration in Days Precipitation Snow Depth Snow Depth SWE Notes
6/9/2010 6/10/2010 7:00 AM 2 0.99 0.0 M This is a 48-hour gauge amount from 7:00am June 8th to 7:00am June 10th. A few sprinkles were observed on June 8th, just before midnight, amounting to a T. More concentrated showers on June 9th amounted to 0.99in of 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
9/22/2010 3:01 PM Rice to Pea sized (0.25in) hail fell 0.7 miles west of Allison Park, PA in Allegheny County between 3:01pm and 3:02pm. The hail lessened briefly but then from 3:03pm to 3:04pm, the hail approached 0.50in (estimated 0.375in)in size. 3/8" 1/4" Pea Size Rice 2 1min no damage Intermittent True After rain After smaller hail
9/22/2010 3:26 PM The second storm had brief rice sized hail. The hail only lasted about 15 seconds and only a few pellets were observed. Rice Rice Rice 1 1min no damage True After rain