Alert archive / Pennsylvania / Tornado Watches
Tornado Watches in Pennsylvania, 2020
7 tornado watches in 2020. 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 2020. Tap one for its archive.
- Tornado Watches
- 7
- Busiest month
- August3 tornado watches
- Busiest day
- April 13, 20201 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 |
|---|---|---|---|---|
| Apr 13, 11:33 AM EDT | Tornado Watch | SPC | Adams, Bedford, Berks, Blair, Bucks, Cambria and 31 more | 5 hr |
| May 15, 3:32 PM EDT | Tornado Watch | SPC | Bradford, Susquehanna, Wayne | 6 hr |
| Aug 2, 3:10 PM EDT | Tornado Watch | SPC | Monroe, Pike, Wayne | 7 hr |
| Aug 4, 7:23 AM EDT | Tornado Watch | SPC | Bucks, Chester, Delaware, Montgomery, Philadelphia | 9 hr |
| Aug 27, 1:22 PM EDT | Tornado Watch | SPC | Pike, Susquehanna, Wayne | 7 hr |
| Sep 3, 3:42 PM EDT | Tornado Watch | SPC | Adams, Berks, Bucks, Chester, Cumberland, Dauphin and 8 more | 6 hr |
| Nov 30, 1:07 PM EST | Tornado Watch | SPC | Bucks, Chester, Delaware, Montgomery, Philadelphia | 6 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Bucks County4
- Chester County4
- Delaware County4
- Montgomery County4
- Philadelphia County4
- Wayne County3
- Adams County2
- Berks County2
- Cumberland County2
- Dauphin County2
- Franklin County2
- Lancaster County2
- Lebanon County2
- Lehigh County2
- Monroe County2
- York County2
- Susquehanna County2
- Pike County2
- Bedford County1
- Blair County1
- Cambria County1
- Carbon County1
- Centre County1
- Clinton County1
- Columbia County1
- Fulton County1
- Huntingdon County1
- Juniata County1
- Luzerne County1
- Lycoming County1
- Mifflin County1
- Montour County1
- Northampton County1
- Northumberland County1
- Perry County1
- Schuylkill County1
- Snyder County1
- Somerset County1
- Sullivan County1
- Union County1
1 more counties
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20192021
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.