Tornado Warnings in Pennsylvania
1,332 tornado 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 tornado warnings reaches back to 1986.
Tornado Warnings by county
Each county as a circle sized by its count since 1986. Tap one for its archive.
- Tornado Warnings
- 1,332
- Busiest year
- 1998108 tornado warnings
- Average year
- 32over 41 years on file
Over time
By year
Before October 2007 these were issued for whole counties, and a storm crossing three counties was often three warnings; since then one polygon follows the storm. The count changed with the practice, not only with 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.
- Crawford County60
- Westmoreland County55
- Lancaster County54
- York County53
- Chester County51
- Butler County47
- Wayne County47
- Bucks County46
- Washington County43
- Montgomery County43
- Erie County42
- Allegheny County42
- Lycoming County42
- Mercer County41
- Berks County40
- Bradford County40
- Clearfield County40
- Bedford County38
- Susquehanna County38
- Venango County38
- Greene County36
- Indiana County36
- Armstrong County35
- Beaver County35
- Jefferson County35
- Fayette County34
- Dauphin County33
- Potter County33
- Delaware County33
- Clarion County32
- Elk County32
- McKean County32
- Tioga County31
- Warren County30
- Cumberland County29
- Centre County28
- Northumberland County28
- Clinton County27
- Perry County27
- Columbia County26
27 more counties
- Forest County26
- Pike County26
- Sullivan County25
- Huntingdon County25
- Lackawanna County25
- Northampton County25
- Franklin County24
- Monroe County24
- Philadelphia County24
- Lawrence County22
- Cambria County21
- Cameron County21
- Fulton County21
- Lebanon County20
- Somerset County19
- Schuylkill County19
- Wyoming County19
- Luzerne County19
- Lehigh County19
- Montour County19
- Adams County16
- Union County16
- Blair County15
- Juniata County14
- Mifflin County13
- Snyder County12
- Carbon County7
The latest tornado warnings
The most recent on file, newest first.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 9, 8:59 PM EDT | Tornado Warning | CTP | Cameron, McKean, Potter | 31 min |
| Sep 9, 8:08 PM EDT | Tornado Warning | CTP | Potter | 37 min |
| Sep 9, 7:24 PM EDT | Tornado Warning | PBZ | Beaver | 14 min |
| Sep 9, 7:16 PM EDT | Tornado Warning | CTP | McKean | 29 min |
| Sep 3, 7:54 PM EDT | Tornado Warning | CTP | Bedford, Blair, Cambria | 36 min |
| Sep 3, 7:39 PM EDT | Tornado Warning | CTP | Bedford, Cambria, Somerset | 36 min |
| Sep 3, 6:56 PM EDT | Tornado Warning | PBZ | Westmoreland | 23 min |
| Sep 3, 6:53 PM EDT | Tornado Warning | PBZ | Fayette, Westmoreland | 37 min |
| Sep 3, 6:36 PM EDT | Tornado Warning | PBZ | Westmoreland | 24 min |
| Sep 3, 5:00 PM EDT | Tornado Warning | CLE | Crawford, Erie | 13 min |
| Sep 3, 4:02 PM EDT | Tornado Warning | PBZ | Mercer | 28 min |
| Sep 2, 11:15 PM EDT | Tornado Warning | CTP | Elk, McKean, Warren | 15 min |
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. Rebuilt daily.