Alert archive / Pennsylvania / Excessive Heat Warnings
Excessive Heat Warnings in Pennsylvania, 2021
4 excessive heat warnings in 2021. 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 in 2021. Tap one for its archive.
- Excessive Heat Warnings
- 4
- Busiest month
- August3 excessive heat warnings
- Busiest day
- June 28, 20211 excessive heat warnings
Over time
By month
The alerts
Every alert, in the order issued. Times are local, Eastern Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 28, 3:13 PM EDT | Excessive Heat Warning | PHI | Bucks, Chester, Delaware, Montgomery, Philadelphia | 53 hr |
| Aug 10, 3:33 AM EDT | Excessive Heat Warning | PHI | Berks, Bucks, Chester, Delaware, Lehigh, Montgomery and 2 more | 4 days |
| Aug 11, 3:38 AM EDT | Excessive Heat Warning | CTP | Adams, Columbia, Cumberland, Dauphin, Franklin, Juniata and 10 more | 39 hr |
| Aug 12, 3:33 AM EDT | Excessive Heat Warning | CTP | Adams, Dauphin, Lancaster, Lebanon, York | 39 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Bucks County2
- Chester County2
- Delaware County2
- Montgomery County2
- Philadelphia County2
- Adams County2
- Dauphin County2
- Lancaster County2
- Lebanon County2
- York County2
- Berks County1
- Lehigh County1
- Northampton County1
- Columbia County1
- Cumberland County1
- Franklin County1
- Juniata County1
- Lycoming County1
- Montour County1
- Northumberland County1
- Perry County1
- Schuylkill County1
- Snyder County1
- Union County1
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20202022
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. Rebuilt daily.