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 2018. The weather variables in this climatology are tornadoes (1950-2018), severe winds (1955-2018; 58 mph or greater), and large hail (1955-2018; 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, PA Beaver, PA Lawrence, PA Butler, PA Mercer, PA Venango, PA Forest, PA Clarion, PA Jefferson, PA Indiana, PA Armstrong, PA Westmoreland, PA Fayette, PA Greene, PA Washington, PA Garrett, MD Hancock, WV Brooke, WV Ohio, WV Marshall, WV Wetzel, WV Marion, WV Monongalia, WV Preston, WV Tucker, WV Columbiana, OH Carroll, OH Jefferson, OH Harrison, OH Tuscarawas, OH Coshocton, OH Muskingum, OH Guernsey, OH Belmont, OH Noble, WV Monroe, WV