National Weather Service United States Department of Commerce

 

This page provides an overview of severe weather climatology for the Pittsburgh, PA (PBZ) CWA since 1950.

This climatology looks at severe weather for the Pittsburgh county warning area from 1950 to 2020. The weather variables in this climatology are tornadoes (1950-2020), severe winds (1955-2019; 58 mph or greater), and large hail (1955-2019; 0.75" in diameter or larger). In 2010, the threshold for severe hail changed from 0.75" to 1.00", however, the NWS still collects reports of hail greater than 0.75".

It is important to view these severe weather reports as just that, reports. We rely heavily on Skywarn Spotters, Broadcast Media, Cooperative Observers, County Officials, and the Public for severe weather reports. While we remain diligent in our efforts to document every occurrence of severe weather, we understand that a lot of cases go unrecorded. Each one of severe weather elements was looked at in detail to determine favorable times of occurrence by month and time and day.

 

Allegheny County Butler County Beaver County Lawrence County Washington County Westmoreland County Mercer County Venango County Forest County Clarion County Armstrong County Jefferson County Indiana County Greene County Fayette County Hancock County Brooke County Ohio County Marshall County Wetzel County Monongalia County Marion County Preston County Tucker County Columbiana County Carroll County Tuscarawas County Harrison County Jefferson County Coshocton County Muskingum County Guernsey County Belmont County Noble County Monroe County
 

Most Recent and Strongest Tornadoes By County

 
County Most Recent Magnitude (F/EF) Strongest Magnitude (F/EF)
Allegheny, PA 2021-10-21 1 1980 4
Armstrong, PA 2022-03-31 2 1980 4
Beaver, PA 2021-10-21 1 1985 3
Belmont, OH 2023-08-12 1 2023, 2021, 1985 1
Brooke, WV None on Record N/A N/A N/A
Butler, PA 2021-10-21 0 1985 3
Carroll, OH 2021-07-29 2 1954, 2021 2
Clarion, PA 2017-07-11 0 1954, 1978, 1996 2
Columbiana, OH 2021-06-11 0 1978 3
Coshocton, OH 1985-05-31 3 1985 3
Fayette, PA 2021-07-29 1 1965, 1971, 1986, 1998 2
Forest, PA 2017-05-01 1 1985 4
Greene, PA 2022-08-01 0 1968 2
Guernsey, OH 2021-10-16 0 1968, 1971, 1973, 1978 2
Hancock, WV None on Record N/A N/A N/A
Harrison, OH 2021-07-29 2 1969 3
Indiana, PA 2021-07-29 1 1951, 1953, 1980, 1981, 1983, 1996 2
Jefferson, OH 2021-10-21 1 1954 2
Jefferson, PA 2021-10-16 0 1976, 1996, 2018 2
Lawrence, PA 2021-05-03 0 1954, 1977, 1992 2
Marion, WV 2021-06-14 0 1981 2
Marshall, WV 2021-08-01 2 2022 2
Mercer, PA 2021-09-22 1 1985 5
Monongalia, WV 2018-06-27 0 1980 3
Monroe, OH 1990-06-22 0 1969 1
Muskingum, OH 2021-10-16 1 1985 3
Noble, OH 1998-06-27 2 1998 2
Ohio, WV 2022-08-01 2 2022 2
Preston, WV 2008-07-30 0 1980 3
Tucker, WV 1992-07-05 0 1985 1
Tuscarawas, OH 2020-04-08 0 1955, 1958, 2003 2
Venango, PA 2021-07-29 0 1985 4
Washington, PA 2023-08-12 1 1990, 2021, 2022 2
Westmoreland, PA 2021-07-29 1 1980 4
Wetzel, WV 1996-07-30 1 1996 1