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Severe Weather Climatology for the Pittsburgh, PA CWA

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 PBZ CWA from 1950 to 2013. The weather variables in this climatology are tornadoes (1950-2013), severe winds (1955-2013; 58 mph or greater), and large hail (1955-2013; 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 PBZ Tornado Tracks webpage.

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Tornado Paths Tornadoes per County  


Tornado Frequency by Month Tornado Frequency by Hour


Tornado Strength Proportions Tornado Fatalities


Severe Winds

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Wind Reports plot Wind Reports per County  


Wind Frequency by Month Wind Frequency by Hour



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Hail Reports plot Hail Reports per County  


Hail Frequency by Month Hail Frequency by Hour




Climatology compiled by Tim Axford
NWS Pittsburgh, PA