Heat Advisories in Pennsylvania
272 heat advisories 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 heat advisories reaches back to 2005.
Heat Advisories by county
Each county as a circle sized by its count since 1986. Tap one for its archive.
- Heat Advisories
- 272
- Busiest year
- 202425 heat advisories
- Average year
- 13over 21 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 County78
- Montgomery County78
- Delaware County75
- Philadelphia County75
- Chester County75
- Lancaster County69
- Berks County68
- York County68
- Lebanon County65
- Dauphin County63
- Adams County62
- Lehigh County62
- Cumberland County60
- Northampton County60
- Franklin County55
- Perry County54
- Columbia County37
- Lackawanna County36
- Luzerne County36
- Montour County36
- Northumberland County36
- Fulton County35
- Juniata County35
- Lycoming County35
- Snyder County35
- Union County35
- Schuylkill County32
- Greene County30
- Allegheny County29
- Beaver County29
- Washington County29
- Mifflin County28
- Huntingdon County27
- Wyoming County26
- Clinton County25
- Pike County25
- Bradford County24
- Fayette County24
- Westmoreland County24
- Butler County23
27 more counties
- Lawrence County23
- Bedford County21
- Centre County21
- Wayne County21
- Armstrong County20
- Blair County19
- Carbon County19
- Monroe County19
- Susquehanna County19
- Mercer County16
- Sullivan County11
- Crawford County10
- Erie County10
- Tioga County10
- Venango County8
- Clarion County8
- Cameron County6
- Elk County6
- McKean County6
- Potter County6
- Warren County6
- Cambria County5
- Clearfield County5
- Forest County5
- Jefferson County5
- Somerset County5
- Indiana County5
The latest heat advisories
The most recent on file, newest first.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 2, 3:53 AM EDT | Heat Advisory | PHI | Berks, Bucks, Chester, Delaware, Montgomery, Philadelphia | 40 hr |
| Sep 2, 3:35 AM EDT | Heat Advisory | CTP | Adams, Cumberland, Dauphin, Franklin, Fulton, Huntingdon and 6 more | 40 hr |
| Sep 1, 12:59 PM EDT | Heat Advisory | PBZ | Allegheny, Armstrong, Beaver, Butler, Fayette, Greene and 3 more | 55 hr |
| Sep 1, 2:30 AM EDT | Heat Advisory | PHI | Bucks, Chester, Delaware, Montgomery, Philadelphia | 18 hr |
| Aug 6, 1:01 AM EDT | Heat Advisory | CTP | Lancaster, Lebanon | 19 hr |
| Aug 5, 1:50 PM EDT | Heat Advisory | PHI | Berks, Bucks, Carbon, Chester, Delaware, Lehigh and 4 more | 3 days |
| Jul 16, 12:10 AM EDT | Heat Advisory | PHI | Bucks, Chester, Delaware, Montgomery, Philadelphia | 20 hr |
| Jul 14, 12:45 PM EDT | Heat Advisory | PBZ | Allegheny, Armstrong, Beaver, Butler, Clarion, Fayette and 7 more | 31 hr |
| Jul 13, 2:45 PM EDT | Heat Advisory | PHI | Berks, Bucks, Carbon, Chester, Lehigh, Monroe and 2 more | 53 hr |
| Jul 13, 1:40 PM EDT | Heat Advisory | CTP | Adams, Cumberland, Franklin, Fulton, Lancaster, York | 54 hr |
| Jul 13, 2:04 AM EDT | Heat Advisory | CTP | Cameron, Centre, Clinton, Columbia, Dauphin, Elk and 16 more | 66 hr |
| Jul 13, 1:56 AM EDT | Heat Advisory | BGM | Bradford, Lackawanna, Luzerne, Pike, Susquehanna, Wayne and 1 more | 47 hr |
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.