Alert archive / Pennsylvania / Severe Thunderstorm Watches
Severe Thunderstorm Watches in Pennsylvania, 2018
19 severe thunderstorm watches in 2018. 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 severe thunderstorm watches reaches back to 1997.
Severe Thunderstorm Watches by county
Each county as a circle sized by its count in 2018. Tap one for its archive.
- Severe Thunderstorm Watches
- 19
- Busiest month
- May9 severe thunderstorm watches
- Busiest day
- May 4, 20183 severe thunderstorm 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 3, 7:07 PM EDT | Severe Thunderstorm Watch | SPC | Greene, Washington | 6 hr |
| May 4, 1:22 PM EDT | Severe Thunderstorm Watch | SPC | Crawford, Erie | 5 hr |
| May 4, 2:44 PM EDT | Severe Thunderstorm Watch | SPC | Allegheny, Armstrong, Beaver, Bradford, Butler, Cambria and 23 more | 6 hr |
| May 4, 6:20 PM EDT | Severe Thunderstorm Watch | SPC | Columbia, Lackawanna, Luzerne, Montour, Northumberland, Pike and 5 more | 4 hr |
| May 12, 2:47 PM EDT | Severe Thunderstorm Watch | SPC | Adams, Allegheny, Armstrong, Beaver, Bedford, Blair and 15 more | 8 hr |
| May 13, 4:28 PM EDT | Severe Thunderstorm Watch | SPC | Bedford, Fayette, Greene, Somerset, Washington, Westmoreland | 7 hr |
| May 14, 12:29 PM EDT | Severe Thunderstorm Watch | SPC | Adams, Allegheny, Armstrong, Beaver, Bedford, Blair and 16 more | 9 hr |
| May 15, 12:26 PM EDT | Severe Thunderstorm Watch | SPC | Adams, Allegheny, Armstrong, Bedford, Blair, Bradford and 37 more | 7 hr |
| May 15, 1:46 PM EDT | Severe Thunderstorm Watch | SPC | Berks, Bucks, Carbon, Chester, Delaware, Lehigh and 4 more | 9 hr |
| May 22, 1:42 PM EDT | Severe Thunderstorm Watch | SPC | Allegheny, Beaver, Butler, Crawford, Lawrence, Mercer and 2 more | 7 hr |
| Jun 13, 4:06 PM EDT | Severe Thunderstorm Watch | SPC | Bradford, Lackawanna, Luzerne, McKean, Potter, Susquehanna and 4 more | 7 hr |
| Jun 13, 6:33 PM EDT | Severe Thunderstorm Watch | SPC | Allegheny, Armstrong, Beaver, Bedford, Blair, Butler and 30 more | 4 hr |
| Jul 27, 1:17 PM EDT | Severe Thunderstorm Watch | SPC | Adams, Berks, Bucks, Carbon, Chester, Cumberland and 17 more | 9 hr |
| Aug 17, 3:44 PM EDT | Severe Thunderstorm Watch | SPC | Berks, Bradford, Carbon, Columbia, Lackawanna, Lehigh and 14 more | 7 hr |
| Aug 21, 2:41 PM EDT | Severe Thunderstorm Watch | SPC | Adams, Armstrong, Bedford, Blair, Cambria, Centre and 16 more | 7 hr |
| Sep 21, 4:32 PM EDT | Severe Thunderstorm Watch | SPC | Allegheny, Armstrong, Beaver, Butler, Clarion, Crawford and 9 more | 4 hr |
| Sep 21, 4:50 PM EDT | Severe Thunderstorm Watch | SPC | Cameron, Clearfield, Elk, McKean, Potter, Warren | 6 hr |
| Sep 26, 5:02 PM EDT | Severe Thunderstorm Watch | SPC | Adams, Berks, Bucks, Carbon, Chester, Cumberland and 12 more | 4 hr |
| Oct 2, 3:29 PM EDT | Severe Thunderstorm Watch | SPC | Fayette, Greene | 6 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Washington County9
- Greene County8
- Fayette County8
- Westmoreland County8
- Allegheny County7
- Armstrong County7
- Indiana County7
- Somerset County7
- Cumberland County7
- Perry County7
- Beaver County6
- Butler County6
- Cambria County6
- Adams County6
- Bedford County6
- Franklin County6
- Clearfield County5
- Jefferson County5
- Luzerne County5
- Blair County5
- Fulton County5
- Huntingdon County5
- Juniata County5
- Mifflin County5
- York County5
- Bradford County4
- Cameron County4
- Centre County4
- Clarion County4
- Elk County4
- Lycoming County4
- McKean County4
- Potter County4
- Sullivan County4
- Venango County4
- Columbia County4
- Lackawanna County4
- Montour County4
- Northumberland County4
- Snyder County4
27 more counties
- Union County4
- Wayne County4
- Wyoming County4
- Dauphin County4
- Schuylkill County4
- Berks County4
- Carbon County4
- Lehigh County4
- Monroe County4
- Northampton County4
- Crawford County3
- Clinton County3
- Forest County3
- Lawrence County3
- Mercer County3
- Tioga County3
- Warren County3
- Pike County3
- Susquehanna County3
- Lancaster County3
- Lebanon County3
- Bucks County3
- Chester County3
- Delaware County3
- Montgomery County3
- Philadelphia County3
- Erie County2
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20172019
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.