Alert archive / Pennsylvania / Mesoscale Discussions / 2021

Mesoscale Discussions in Pennsylvania, July 2021

40 mesoscale discussions in July 2021. 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 mesoscale discussions reaches back to 2003.

Mesoscale Discussions by county

Each county as a circle sized by its count in July 2021. Tap one for its archive.

Mesoscale Discussions
40
Busiest day
July 7, 20214 mesoscale discussions

Over time

By day

Days in UTC, the clock the archive keeps.

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
Jul 1, 11:45 AM EDTMesoscale DiscussionSPCBucks, Chester, Delaware, Lancaster, Montgomery, Philadelphia2 hr
Jul 1, 2:36 PM EDTMesoscale DiscussionSPCBucks, Chester, Delaware, Montgomery, Philadelphia84 min
Jul 1, 4:16 PM EDTMesoscale DiscussionSPCDelaware, Philadelphia89 min
Jul 2, 3:13 PM EDTMesoscale DiscussionSPCBerks, Bradford, Bucks, Cameron, Carbon, Centre and 32 more92 min
Jul 6, 12:33 PM EDTMesoscale DiscussionSPCBerks, Bradford, Bucks, Carbon, Chester, Columbia and 23 more2 hr
Jul 6, 4:23 PM EDTMesoscale DiscussionSPCBerks, Bucks, Carbon, Chester, Columbia, Dauphin and 16 more97 min
Jul 6, 5:25 PM EDTMesoscale DiscussionSPCCarbon, Monroe, Northampton95 min
Jul 7, 1:50 PM EDTMesoscale DiscussionSPCLackawanna, Monroe, Northampton, Pike, Wayne115 min
Jul 7, 3:59 PM EDTMesoscale DiscussionSPCCrawford, Erie91 min
Jul 7, 4:48 PM EDTMesoscale DiscussionSPCBerks, Bradford, Bucks, Carbon, Columbia, Lackawanna and 15 more87 min
Jul 7, 7:11 PM EDTMesoscale DiscussionSPCBradford, Cameron, Carbon, Centre, Clinton, Columbia and 16 more2 hr
Jul 8, 1:31 PM EDTMesoscale DiscussionSPCCrawford, Erie, Lawrence, Mercer, Venango, Warren2 hr
Jul 8, 1:44 PM EDTMesoscale DiscussionSPCBerks, Bucks, Carbon, Chester, Delaware, Lancaster and 7 more3 hr
Jul 8, 4:36 PM EDTMesoscale DiscussionSPCBerks, Bucks, Carbon, Chester, Dauphin, Delaware and 9 more114 min
Jul 9, 4:35 PM EDTMesoscale DiscussionSPCBerks, Bucks, Carbon, Chester, Columbia, Cumberland and 24 more115 min
Jul 11, 2:05 PM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Bedford, Blair, Butler and 15 more55 min
Jul 11, 5:41 PM EDTMesoscale DiscussionSPCBedford, Blair, Cambria, Centre, Clearfield, Clinton and 12 more94 min
Jul 11, 8:58 PM EDTMesoscale DiscussionSPCAdams, Berks, Carbon, Columbia, Cumberland, Dauphin and 11 more62 min
Jul 12, 1:32 PM EDTMesoscale DiscussionSPCAdams, Bedford, Berks, Blair, Bucks, Carbon and 26 more88 min
Jul 12, 7:25 PM EDTMesoscale DiscussionSPCBerks, Bucks, Carbon, Chester, Delaware, Lancaster and 6 more2 hr
Jul 13, 12:48 PM EDTMesoscale DiscussionSPCArmstrong, Berks, Blair, Bradford, Cambria, Cameron and 36 more87 min
Jul 13, 4:07 PM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Bedford, Blair, Bradford and 41 more113 min
Jul 13, 6:44 PM EDTMesoscale DiscussionSPCBlair, Bradford, Cambria, Cameron, Centre, Clearfield and 22 more91 min
Jul 13, 9:12 PM EDTMesoscale DiscussionSPCBradford, Carbon, Columbia, Juniata, Lackawanna, Luzerne and 10 more93 min
Jul 16, 5:51 PM EDTMesoscale DiscussionSPCBerks, Bucks, Carbon, Columbia, Cumberland, Dauphin and 16 more114 min
Jul 17, 12:00 PM EDTMesoscale DiscussionSPCAdams, Bedford, Berks, Blair, Bradford, Bucks and 35 more3 hr
Jul 17, 3:02 PM EDTMesoscale DiscussionSPCBerks, Bucks, Chester, Delaware, Lancaster, Lehigh and 3 more88 min
Jul 17, 4:38 PM EDTMesoscale DiscussionSPCAdams, Berks, Bradford, Bucks, Carbon, Chester and 31 more97 min
Jul 17, 6:54 PM EDTMesoscale DiscussionSPCAdams, Berks, Bucks, Carbon, Chester, Columbia and 22 more2 hr
Jul 17, 10:02 PM EDTMesoscale DiscussionSPCBucks, Chester, Delaware, Montgomery, Philadelphia58 min
Jul 20, 10:01 PM EDTMesoscale DiscussionSPCBradford, Lackawanna, Potter, Sullivan, Susquehanna, Tioga and 2 more59 min
Jul 21, 10:32 AM EDTMesoscale DiscussionSPCBucks, Chester, Delaware, Lancaster, Montgomery, Philadelphia58 min
Jul 21, 2:39 PM EDTMesoscale DiscussionSPCChester, Delaware, Montgomery, Philadelphia2 hr
Jul 27, 2:01 PM EDTMesoscale DiscussionSPCSusquehanna89 min
Jul 27, 4:36 PM EDTMesoscale DiscussionSPCLackawanna, Pike, Susquehanna, Wayne, Wyoming84 min
Jul 27, 6:09 PM EDTMesoscale DiscussionSPCBradford, Lackawanna, Lycoming, Pike, Sullivan, Susquehanna and 3 more96 min
Jul 29, 1:21 PM EDTMesoscale DiscussionSPCAdams, Bedford, Blair, Cumberland, Dauphin, Franklin and 7 more114 min
Jul 29, 4:26 PM EDTMesoscale DiscussionSPCBerks, Bucks, Carbon, Chester, Delaware, Lancaster and 7 more94 min
Jul 29, 6:34 PM EDTMesoscale DiscussionSPCAllegheny, Beaver, Fayette, Greene, Washington116 min
Jul 29, 7:09 PM EDTMesoscale DiscussionSPCPhiladelphia96 min

By county

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

27 more counties

Nearby

Alerts in force nowTornadoes on recordThe radar archive20202022

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.