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 2014. The weather variables in this climatology are tornadoes (1950-2014), severe winds (1955-2014; 58 mph or greater), and large hail (1955-2014; 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 occurence 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 occurence by month and time and day.



For more detailed maps of tornado tracks for each county, please visit our Pittsburgh Tornado Tracks webpage.

Click on each thumbnail to view the larger image

Tornado Tracks Tornadoes by County


Tornado Frequency by Month  Tornado Frequency by Hour


Tornado Proportions Tornado Fatalities


Severe Winds

Click on each thumbnail to view the larger image.

Wind Reports Wind Reports per County


Wind Frequency by Month Wind Frequency by Hour


Large Hail

Click on each thumbnail to view the larger image.

Large Hail Reports Large Hail Reports by County


Large Hail Reports by Month Large Hail Reports by Hour




Climatology compiled by Tim Axford
NWS Pittsburgh, PA