Excessive Heat Warnings in Pennsylvania
71 excessive heat warnings since 1986. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of excessive heat warnings reaches back to 2005.
Excessive Heat Warnings by county
Each county as a circle sized by its count since 1986. Tap one for its archive.
- Excessive Heat Warnings
- 71
- Busiest year
- 201110 excessive heat warnings
- Average year
- 4over 18 years on file
Over time
By year
Before late 2005 the archive holds only tornado, severe thunderstorm, flash flood and marine warnings, and from 1997 SPC's watches, so the jump that year is the archive widening, not the weather.
By month of the year
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Delaware County49
- Philadelphia County49
- Bucks County25
- Montgomery County25
- Chester County22
- Dauphin County13
- York County13
- Adams County12
- Lancaster County12
- Lebanon County12
- Berks County11
- Cumberland County11
- Lehigh County10
- Northampton County10
- Franklin County9
- Perry County9
- Schuylkill County6
- Columbia County5
- Juniata County5
- Lycoming County5
- Montour County5
- Northumberland County5
- Snyder County5
- Union County5
- Lackawanna County4
- Luzerne County4
- Mifflin County4
- Allegheny County4
- Beaver County4
- Washington County4
- Carbon County3
- Monroe County3
- Butler County3
- Clinton County3
- Bradford County2
- Pike County2
- Susquehanna County2
- Wayne County2
- Wyoming County2
- Fayette County2
Nearby
Sources
National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Warning verification from the Mesonet's Cow. Rebuilt daily.