Alert archive / Pennsylvania / Tornado Watches
Tornado Watches in Pennsylvania, 2011
12 tornado watches in 2011. 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 watches reaches back to 1997.
Tornado Watches by county
Each county as a circle sized by its count in 2011. Tap one for its archive.
- Tornado Watches
- 12
- Busiest month
- May3 tornado watches
- Busiest day
- May 26, 20112 tornado watches
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 |
|---|---|---|---|---|
| Feb 28, 5:47 AM EST | Tornado Watch | SPC | Allegheny, Armstrong, Beaver, Butler, Fayette, Greene and 3 more | 5 hr |
| Mar 23, 1:13 PM EDT | Tornado Watch | SPC | Allegheny, Beaver, Fayette, Greene, Washington, Westmoreland | 7 hr |
| Apr 16, 4:41 PM EDT | Tornado Watch | SPC | Adams, Bedford, Berks, Blair, Chester, Cumberland and 13 more | 6 hr |
| Apr 27, 3:10 PM EDT | Tornado Watch | SPC | Adams, Allegheny, Armstrong, Beaver, Bedford, Blair and 43 more | 7 hr |
| May 25, 1:55 PM EDT | Tornado Watch | SPC | Crawford, Erie | 8 hr |
| May 26, 2:16 PM EDT | Tornado Watch | SPC | Bradford, Lackawanna, Luzerne, Pike, Susquehanna, Wayne and 1 more | 8 hr |
| May 26, 2:53 PM EDT | Tornado Watch | SPC | Adams, Bedford, Blair, Centre, Clinton, Columbia and 20 more | 7 hr |
| Jun 1, 12:58 PM EDT | Tornado Watch | SPC | Berks, Bucks, Carbon, Chester, Delaware, Lehigh and 4 more | 7 hr |
| Jul 29, 5:03 PM EDT | Tornado Watch | SPC | Lackawanna, Luzerne, Monroe, Pike, Wayne | 3 hr |
| Aug 24, 10:27 PM EDT | Tornado Watch | SPC | Crawford, Erie | 5 hr |
| Aug 27, 7:56 PM EDT | Tornado Watch | SPC | Bucks, Chester, Delaware, Montgomery, Philadelphia | 9 hr |
| Nov 14, 3:29 PM EST | Tornado Watch | SPC | Crawford, Erie, Lawrence, Mercer, Venango | 6 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Allegheny County3
- Beaver County3
- Fayette County3
- Greene County3
- Washington County3
- Westmoreland County3
- Adams County3
- Bedford County3
- Blair County3
- Chester County3
- Cumberland County3
- Dauphin County3
- Delaware County3
- Franklin County3
- Fulton County3
- Huntingdon County3
- Juniata County3
- Lancaster County3
- Lebanon County3
- Mifflin County3
- Perry County3
- Schuylkill County3
- Snyder County3
- York County3
- Crawford County3
- Erie County3
- Armstrong County2
- Butler County2
- Indiana County2
- Berks County2
- Bradford County2
- Centre County2
- Clinton County2
- Columbia County2
- Lawrence County2
- Lycoming County2
- Mercer County2
- Montour County2
- Northumberland County2
- Potter County2
27 more counties
- Sullivan County2
- Tioga County2
- Union County2
- Venango County2
- Lackawanna County2
- Luzerne County2
- Pike County2
- Wayne County2
- Bucks County2
- Monroe County2
- Montgomery County2
- Philadelphia County2
- Cambria County1
- Cameron County1
- Clarion County1
- Clearfield County1
- Elk County1
- Forest County1
- Jefferson County1
- McKean County1
- Somerset County1
- Warren County1
- Susquehanna County1
- Wyoming County1
- Carbon County1
- Lehigh County1
- Northampton County1
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20102012
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.