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Allegheny storm history

Storm events recorded in Allegheny, Pennsylvania between 1950 and 2025.

2,542
Total events
27
Tornadoes
442
Hail
619
Floods
14
Deaths
$454.2M
Property damage

Most significant events

Strongest tornadoes, deadliest events, and biggest damage in this county. Up to 50 shown.

June 3, 1980 · Allegheny, Pennsylvania
Tornado F4 Tornado20 injuries, $250.0M damage
August 3, 1963 · Allegheny, Pennsylvania
Tornado F3 Tornado2 deaths, 70 injuries, $25.0M damage
April 29, 2025 · Allegheny, Pennsylvania
Thunderstorm Wind Thunderstorm Wind1 death, 1 injury
At approximately 5:08 PM based off of radar coverage, a line of storms crossing the Pittsburgh area with very strong, damaging wind gusts caused a tree to fall and kill a man as he was walking back to his house in Ross Township.
June 16, 2022 · Allegheny, Pennsylvania
Excessive Heat Excessive Heat1 death
A 3 month old male died after being left several hours in a hot car along Fort Couch Road in Upper Saint Clair, PA. The maximum high temperature at KAGC (11 miles from the incident) was 92F; heat index for the day was close to 100 degrees. Article: https://www.nbcnews.com/news/us…
August 19, 2011 · Allegheny, Pennsylvania
Flash Flood Flash Flood4 deaths, 1 injury
A NWS storm survey found that 2.5 inches of rain fell in one hour in a very urbanized 4.8 sq mi watershed just east of downtown Pittsburgh. Severe flash flooding developed on Washington Blvd resulting in four fatalities and up to 15 water rescues. A mother and two daughters were …
September 17, 2004 · Allegheny, Pennsylvania
Flood Flood1 death, 92 injuries, $26.0M damage
May 31, 2002 · Allegheny, Pennsylvania
Thunderstorm Wind Thunderstorm Wind1 death, 54 injuries, $10.0M damage
January 2, 1999 · Allegheny, Pennsylvania
Winter Storm Winter Storm2 deaths, 1 injury
July 1, 1997 · Allegheny, Pennsylvania
Flash Flood Flash Flood1 death, $10.0M damage
A nearly stationary thunderstorm formed over the eastern part of Allegheny County during the evening of July 1. The storm dropped near 4 inches of rain in about 90 minutes over a 4 square-mile area. The resulting flash flood was centered in a small watershed in and near Pitcairn.…
June 19, 1996 · Allegheny, Pennsylvania
Flash Flood Flash Flood1 death
December 11, 2002 · Allegheny, Pennsylvania
Ice Storm Ice Storm40 injuries
June 30, 1998 · Allegheny, Pennsylvania
Thunderstorm Wind Thunderstorm Wind10 injuries, $41.0M damage
A microburst with winds up to 85 MPH moved diagonally from northwest to southeast across Allegheny County, leaving a wide swath of damage in its wake. These winds produced an estimated $41 million in damage across the county. Over 125,000 people across the county had their power …
June 2, 1998 · Allegheny, Pennsylvania
Tornado F1 Tornado50 injuries, $13.0M damage
October 6, 2024 · Allegheny, Pennsylvania
Thunderstorm Wind Thunderstorm Wind$2.0M damage
Numerous powerlines were reported down around the Ramblewood area.
October 6, 2024 · Allegheny, Pennsylvania
Thunderstorm Wind Thunderstorm Wind$1.5M damage
Trees were reported down along Bakersfield Road, near the Pittsburgh North Golf Club.
October 6, 2024 · Allegheny, Pennsylvania
Thunderstorm Wind Thunderstorm Wind$1.5M damage
Trees were reported down along Valencia Road.
October 6, 2024 · Allegheny, Pennsylvania
Thunderstorm Wind Thunderstorm Wind$2.0M damage
Babcock Boulevard in Shaler Township was closed due to downed trees and powerlines.
October 6, 2024 · Allegheny, Pennsylvania
Thunderstorm Wind Thunderstorm Wind$1.5M damage
A few small trunks and were snapped along Rachel Carson Trail.
July 2, 2018 · Allegheny, Pennsylvania
Flash Flood Flash Flood$1.3M damage
The 911 Call Center reported flooded intersection near Squaw Run Road/Field Club Road and at the intersection Fairview Road and Old Mill Road. An emergency manager also reported rushing water near Woodland Farms Road. Fox Chapel Stone Supply INC worker says the store took on 2 ft…
June 20, 2018 · Allegheny, Pennsylvania
Flash Flood Flash Flood1 injury, $10.0M damage
The 911 Call Center has reported that a number of roads in southern Bethel Park have been flooded and/or impassable. This roads include: Glendale Drive, Logan Road, O'Neill Drive, Dashwood Drive (vehicle was stuck in water). Water entered the Trolley Stop Inn restaurant, cars in …
August 9, 2007 · Allegheny, Pennsylvania
Flash Flood Flash Flood$15.0M damage
Heavy rain caused flash flooding in the Millvale area and much of the North Hills area of Pittsburgh as Girtys Run came out of it's banks. Over 900 homes were affected by the flooding as well as over 200 businesses. Infrasturcture owned by local municipalities sustained over 4 mi…
January 31, 2001 · Allegheny, Pennsylvania
Flash Flood Flash Flood$2.0M damage
Ice jams moving down the Youghiogheny River produced minor flooding from Boston down to the McKeesport area. The movement of the ice itself caused the main problem, as it tore apart and destroyed 210 boat docks at the McKeesport Marina on its way out into the Monongahela River
August 6, 2000 · Allegheny, Pennsylvania
Flash Flood Flash Flood$10.0M damage
Widespread flash flooding problems were reported across the county, with 51 of the county's 130 municipalities reporting some degree of storm impact. Of those 51 municipalities, 15 reported significant impact, including flooding of streets and basements, washed-away property and …
June 19, 1996 · Allegheny, Pennsylvania
Flash Flood Flash Flood$3.0M damage
January 19, 1996 · Allegheny, Pennsylvania
Flood Flood$1.9M damage
May 22, 1983 · Allegheny, Pennsylvania
Tornado F2 Tornado$2.5M damage
December 31, 2025 · Allegheny, Pennsylvania
Winter Weather Winter Weather
Widespread snowfall, generally exceeding advisory criteria but falling short of warning criteria, fell across the county with amounts ranging from 3-5 inches and the highest total of 5 inches reported by the Public in Sewickley, 2 miles north of Bridgeville, and 3 miles north of …
December 13, 2025 · Allegheny, Pennsylvania
Winter Storm Winter Storm
Widespread snow accumulation generally ranging from 4 to 8 inches in general was reported across the county with the highest total of 8.8 inches near Bethel Park.
October 19, 2025 · Allegheny, Pennsylvania
High Wind High Wind1 injury
A cold front crossing southwestern Pennsylvania during the afternoon was producing a line of showers with gusts between 35mph and 45mph at times along the frontal boundary. As the front was crossing southern Allegheny County, a tree fell onto utility lines which caused a utility …
July 16, 2025 · Allegheny, Pennsylvania
Flash Flood Flash Flood
Report of flooding across River Road.
July 16, 2025 · Allegheny, Pennsylvania
Flash Flood Flash Flood
Greater than a foot of water was reported to be flowing over Lebanon Church Road at the intersection with PA Route 885.
July 16, 2025 · Allegheny, Pennsylvania
Flash Flood Flash Flood
Report of a foot of water over the road at the intersection of Bakerstown Road and Route 8 resulting in closure of Bakerstown Road. This extends about a half of a mile down the road on Bakerstown Road.
July 16, 2025 · Allegheny, Pennsylvania
Flash Flood Flash Flood
Report of 6 to 9 inches of water flowing over Days Run Road as Days Run Creek is out of its banks.
July 16, 2025 · Allegheny, Pennsylvania
Flash Flood Flash Flood
Report stating that North 3rd Street is flooded and impassable.
July 16, 2025 · Allegheny, Pennsylvania
Thunderstorm Wind Thunderstorm Wind
Report of large limbs snapped which damaged a car on Haines Avenue.
July 16, 2025 · Allegheny, Pennsylvania
Hail Hail
July 14, 2025 · Allegheny, Pennsylvania
Flash Flood Flash Flood
Report of flooded roadway at the intersection of Yost Boulevard and Ardmore Boulevard.
July 1, 2025 · Allegheny, Pennsylvania
Flash Flood Flash Flood
Flooding was reported on the lower portion of Campbells Run Road causing the road to be closed.
July 1, 2025 · Allegheny, Pennsylvania
Flash Flood Flash Flood
Flooding was reported in the parking lot of Saint Margaret Hospital.
July 1, 2025 · Allegheny, Pennsylvania
Flash Flood Flash Flood
Flooding reported outside of Hays Manor Community Center.
July 1, 2025 · Allegheny, Pennsylvania
Flash Flood Flash Flood
Report of up to two feet of water along Washington Avenue.
June 28, 2025 · Allegheny, Pennsylvania
Flash Flood Flash Flood
The public reported that Streets Run Road closed between Baldwin Road and Ganges Way due to flooding.
June 28, 2025 · Allegheny, Pennsylvania
Flash Flood Flash Flood
State official reported road flooding at the 140 block of Harrison Road.
June 28, 2025 · Allegheny, Pennsylvania
Flash Flood Flash Flood
State official reported that a creek is flooding the intersection of Glenn Avenue and Liberty Way.
June 27, 2025 · Allegheny, Pennsylvania
Thunderstorm Wind Thunderstorm Wind
A tree branch that was larger than 3 inches in diameter was down across Pinewood Terrace.
June 27, 2025 · Allegheny, Pennsylvania
Flash Flood Flash Flood
State official reported that a car was trapped in flood water on McKnight Rd.
June 27, 2025 · Allegheny, Pennsylvania
Flash Flood Flash Flood
State official reported flooding at intersection of McMichael Road and Kenzie Drive.
June 27, 2025 · Allegheny, Pennsylvania
Flash Flood Flash Flood
Trained spotter reported flooding on Freeport Road between Cheswick and Harmar.
June 27, 2025 · Allegheny, Pennsylvania
Flash Flood Flash Flood
State official reported that highway 22/30 was flooded on the west bound side near the Imperial and Oakdale exit.
June 26, 2025 · Allegheny, Pennsylvania
Thunderstorm Wind Thunderstorm Wind
A tree was reported down on Vilsack Road.

Events by year

YearEventsTornadoes
20251920
20241827
2023920
2022800
20211693
20201031
20191230
20181060
2017871
2016570
20151090
2014700
20131710
20121221
2011510
2010410
2009230
2008270
2007601
2006160
2005340
2004370
2003561
2002390
2001210
2000330
1999290
1998782
1997230
1996570
1995320
1994190
199320
1992121
1991150
1990120
198910
198870
1987140
1986110
1985130
198460
198361
198210
198141
198081
197980
197830
197721
197651
197570
1974110
197340
197210
197120
197081
196930
196840
196740
196610
196510
196410
196361
196210
196120
196010
195910
195850
195730
195631
195530
195411