Alert archive / Pennsylvania / Severe Thunderstorm Watches

Severe Thunderstorm Watches in Pennsylvania, 2020

33 severe thunderstorm 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 severe thunderstorm watches reaches back to 1997.

Severe Thunderstorm Watches by county

Each county as a circle sized by its count in 2020. Tap one for its archive.

Severe Thunderstorm Watches
33
Busiest month
June9 severe thunderstorm watches
Busiest day
April 8, 20203 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.

IssuedProductOfficeCountiesLasted
Mar 28, 1:42 PM EDTSevere Thunderstorm WatchSPCAllegheny, Armstrong, Beaver, Butler, Clarion, Fayette and 9 more6 hr
Mar 29, 12:05 PM EDTSevere Thunderstorm WatchSPCArmstrong, Beaver, Butler, Cameron, Clarion, Clearfield and 12 more4 hr
Apr 7, 9:07 PM EDTSevere Thunderstorm WatchSPCCrawford, Erie6 hr
Apr 7, 11:40 PM EDTSevere Thunderstorm WatchSPCAllegheny, Armstrong, Beaver, Butler, Clarion, Fayette and 9 more6 hr
Apr 8, 2:14 AM EDTSevere Thunderstorm WatchSPCBedford, Franklin, Fulton2 hr
Apr 9, 12:01 PM EDTSevere Thunderstorm WatchSPCBucks, Chester, Delaware, Montgomery, Philadelphia4 hr
Apr 21, 1:27 PM EDTSevere Thunderstorm WatchSPCBucks, Chester, Delaware, Montgomery, Philadelphia3 hr
May 29, 2:25 PM EDTSevere Thunderstorm WatchSPCAdams, Berks, Bradford, Bucks, Carbon, Chester and 25 more7 hr
Jun 3, 10:08 AM EDTSevere Thunderstorm WatchSPCAdams, Berks, Blair, Bucks, Cambria, Carbon and 29 more4 hr
Jun 3, 3:52 PM EDTSevere Thunderstorm WatchSPCAdams, Berks, Bucks, Cameron, Centre, Chester and 20 more6 hr
Jun 4, 12:55 PM EDTSevere Thunderstorm WatchSPCAllegheny, Armstrong, Beaver, Butler, Clarion, Fayette and 6 more6 hr
Jun 4, 2:29 PM EDTSevere Thunderstorm WatchSPCAdams, Bedford, Blair, Cambria, Cameron, Centre and 22 more8 hr
Jun 10, 6:51 PM EDTSevere Thunderstorm WatchSPCAllegheny, Armstrong, Beaver, Butler, Clarion, Crawford and 11 more6 hr
Jun 10, 10:20 PM EDTSevere Thunderstorm WatchSPCCameron, Clearfield, Elk, McKean, Potter, Warren3 hr
Jun 26, 11:15 PM EDTSevere Thunderstorm WatchSPCCrawford, Erie5 hr
Jun 27, 3:16 PM EDTSevere Thunderstorm WatchSPCBerks, Bucks, Chester, Delaware, Montgomery, Philadelphia5 hr
Jun 28, 1:32 PM EDTSevere Thunderstorm WatchSPCMonroe, Northampton, Pike, Wayne6 hr
Jul 6, 1:38 PM EDTSevere Thunderstorm WatchSPCAdams, Berks, Bucks, Carbon, Chester, Dauphin and 11 more9 hr
Jul 16, 1:20 PM EDTSevere Thunderstorm WatchSPCAllegheny, Armstrong, Beaver, Butler, Cambria, Cameron and 19 more8 hr
Jul 19, 4:16 PM EDTSevere Thunderstorm WatchSPCCrawford, Erie4 hr
Jul 22, 12:01 PM EDTSevere Thunderstorm WatchSPCAdams, Bedford, Blair, Cambria, Centre, Columbia and 17 more7 hr
Jul 22, 2:57 PM EDTSevere Thunderstorm WatchSPCBerks, Bucks, Carbon, Chester, Delaware, Lackawanna and 10 more7 hr
Jul 23, 2:49 PM EDTSevere Thunderstorm WatchSPCBradford, Carbon, Lackawanna, Lehigh, Luzerne, Monroe and 5 more7 hr
Aug 1, 3:57 PM EDTSevere Thunderstorm WatchSPCAllegheny, Beaver, Fayette, Greene, Washington, Westmoreland7 hr
Aug 25, 1:21 PM EDTSevere Thunderstorm WatchSPCAdams, Allegheny, Armstrong, Beaver, Bedford, Blair and 47 more6 hr
Aug 25, 3:34 PM EDTSevere Thunderstorm WatchSPCBerks, Bucks, Carbon, Chester, Delaware, Lehigh and 4 more7 hr
Aug 27, 2:49 PM EDTSevere Thunderstorm WatchSPCBradford, Cameron, Clinton, Elk, Lackawanna, Luzerne and 7 more5 hr
Aug 27, 5:32 PM EDTSevere Thunderstorm WatchSPCAdams, Allegheny, Armstrong, Beaver, Bedford, Blair and 28 more4 hr
Aug 28, 1:37 PM EDTSevere Thunderstorm WatchSPCAdams, Bedford, Berks, Bucks, Chester, Columbia and 19 more8 hr
Sep 2, 6:43 PM EDTSevere Thunderstorm WatchSPCAdams, Berks, Chester, Cumberland, Dauphin, Delaware and 5 more5 hr
Nov 15, 11:51 AM ESTSevere Thunderstorm WatchSPCBeaver, Butler, Crawford, Erie, Lawrence, Mercer and 1 more3 hr
Nov 15, 1:57 PM ESTSevere Thunderstorm WatchSPCAllegheny, Armstrong, Cameron, Clarion, Clearfield, Elk and 8 more4 hr
Nov 15, 5:35 PM ESTSevere Thunderstorm WatchSPCBerks, Bucks, Carbon, Chester, Dauphin, Delaware and 9 more5 hr

By county

Every county with at least one alert. A county page lists each alert that covered it.

27 more counties

The busiest days

Days with the most alerts issued, by UTC date.

  1. April 8, 20203severe thunderstorm watches
  2. November 15, 20203severe thunderstorm watches
  3. June 3, 20202severe thunderstorm watches
  4. June 4, 20202severe thunderstorm watches
  5. June 27, 20202severe thunderstorm watches
  6. July 22, 20202severe thunderstorm watches
  7. August 25, 20202severe thunderstorm watches
  8. August 27, 20202severe thunderstorm watches
  9. March 28, 20201severe thunderstorm watches
  10. March 29, 20201severe thunderstorm watches
  11. April 9, 20201severe thunderstorm watches
  12. April 21, 20201severe thunderstorm watches

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.