Extreme Heat Warnings in Pennsylvania
10 extreme 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 extreme heat warnings reaches back to 2005.
Extreme Heat Warnings by county
Each county as a circle sized by its count since 1986. Tap one for its archive.
- Extreme Heat Warnings
- 10
- Busiest year
- 20255 extreme heat warnings
- Average year
- 5over 2 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.
- Bucks County4
- Delaware County4
- Montgomery County4
- Philadelphia County4
- Adams County2
- Allegheny County2
- Beaver County2
- Berks County2
- Bradford County2
- Butler County2
- Chester County2
- Columbia County2
- Cumberland County2
- Dauphin County2
- Fayette County2
- Franklin County2
- Juniata County2
- Lackawanna County2
- Lancaster County2
- Lebanon County2
- Lehigh County2
- Luzerne County2
- Lycoming County2
- Mifflin County2
- Montour County2
- Northampton County2
- Northumberland County2
- Perry County2
- Schuylkill County2
- Snyder County2
- Union County2
- Washington County2
- Westmoreland County2
- Wyoming County2
- York County2
- Armstrong County1
- Bedford County1
- Blair County1
- Carbon County1
- Centre County1
The latest extreme heat warnings
The most recent on file, newest first.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 14, 2:38 AM EDT | Extreme Heat Warning | PHI | Bucks, Delaware, Montgomery, Philadelphia | 41 hr |
| Jun 30, 11:58 AM EDT | Extreme Heat Warning | BGM | Bradford, Lackawanna, Luzerne, Pike, Susquehanna, Wayne and 1 more | 3 days |
| Jun 30, 2:44 AM EDT | Extreme Heat Warning | PHI | Berks, Bucks, Carbon, Chester, Delaware, Lehigh and 4 more | 5 days |
| Jun 30, 2:43 AM EDT | Extreme Heat Warning | CTP | Adams, Bedford, Blair, Centre, Clinton, Columbia and 17 more | 5 days |
| Jun 30, 1:30 AM EDT | Extreme Heat Warning | PBZ | Allegheny, Armstrong, Beaver, Butler, Clarion, Fayette and 9 more | 5 days |
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.