Alert archive / Pennsylvania / Mesoscale Discussions / 2011

Mesoscale Discussions in Pennsylvania, April 2011

30 mesoscale discussions in April 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 mesoscale discussions reaches back to 2003.

Mesoscale Discussions by county

Each county as a circle sized by its count in April 2011. Tap one for its archive.

Mesoscale Discussions
30
Busiest day
April 28, 20116 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
Apr 4, 4:12 PM EDTMesoscale DiscussionSPCAllegheny, Beaver, Fayette, Greene, Washington, Westmoreland63 min
Apr 4, 6:00 PM EDTMesoscale DiscussionSPCAllegheny, Fayette, Greene, Indiana, Somerset, Washington and 1 more90 min
Apr 5, 5:03 AM EDTMesoscale DiscussionSPCBerks, Bucks, Carbon, Chester, Delaware, Lancaster and 5 more27 min
Apr 5, 6:25 AM EDTMesoscale DiscussionSPCBucks, Delaware, Philadelphia2 hr
Apr 11, 12:24 PM EDTMesoscale DiscussionSPCFayette, Greene, Somerset36 min
Apr 11, 6:43 PM EDTMesoscale DiscussionSPCAdams, Berks, Bradford, Carbon, Columbia, Cumberland and 22 more62 min
Apr 16, 10:43 AM EDTMesoscale DiscussionSPCFayette, Greene, Washington62 min
Apr 16, 1:34 PM EDTMesoscale DiscussionSPCBeaver, Crawford, Lawrence, Mercer, Washington116 min
Apr 16, 2:05 PM EDTMesoscale DiscussionSPCAdams, Bedford, Cumberland, Dauphin, Franklin, Fulton and 6 more55 min
Apr 16, 4:29 PM EDTMesoscale DiscussionSPCAdams, Chester, Franklin, Fulton, Lancaster, York31 min
Apr 16, 6:38 PM EDTMesoscale DiscussionSPCAdams, Berks, Chester, Cumberland, Dauphin, Delaware and 13 more97 min
Apr 16, 9:58 PM EDTMesoscale DiscussionSPCBerks, Chester, Delaware62 min
Apr 20, 3:20 AM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Butler, Clarion, Crawford and 10 more85 min
Apr 20, 3:45 PM EDTMesoscale DiscussionSPCAdams, Bedford, Berks, Blair, Bradford, Cambria and 30 more30 min
Apr 24, 2:12 PM EDTMesoscale DiscussionSPCAdams, Berks, Bucks, Chester, Cumberland, Dauphin and 10 more93 min
Apr 24, 6:10 PM EDTMesoscale DiscussionSPCAdams, Chester, Delaware, Lancaster, Montgomery, Philadelphia and 1 more65 min
Apr 25, 1:52 PM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Blair, Bradford, Butler and 34 more83 min
Apr 25, 6:00 PM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Blair, Butler, Cambria and 22 more60 min
Apr 26, 1:18 PM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Bedford, Blair, Bradford, Butler and 35 more57 min
Apr 26, 4:12 PM EDTMesoscale DiscussionSPCBedford, Blair, Bradford, Cambria, Cameron, Centre and 30 more63 min
Apr 26, 6:51 PM EDTMesoscale DiscussionSPCAdams, Bedford, Blair, Bradford, Cambria, Cameron and 29 more54 min
Apr 27, 1:24 PM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Bedford, Blair, Butler and 28 more96 min
Apr 27, 3:55 PM EDTMesoscale DiscussionSPCBerks, Bucks, Chester, Delaware, Lehigh, Monroe and 4 more65 min
Apr 27, 6:50 PM EDTMesoscale DiscussionSPCAdams, Berks, Blair, Bradford, Cameron, Carbon and 33 more55 min
Apr 27, 9:03 PM EDTMesoscale DiscussionSPCAdams, Bradford, Columbia, Cumberland, Dauphin, Juniata and 9 more57 min
Apr 27, 10:45 PM EDTMesoscale DiscussionSPCBlair, Bradford, Cambria, Carbon, Centre, Clinton and 23 more60 min
Apr 28, 2:20 AM EDTMesoscale DiscussionSPCAdams, Bedford, Berks, Blair, Bradford, Carbon and 31 more55 min
Apr 28, 3:32 AM EDTMesoscale DiscussionSPCAdams, Berks, Bradford, Bucks, Carbon, Chester and 25 more28 min
Apr 28, 6:21 AM EDTMesoscale DiscussionSPCBerks, Bucks, Carbon, Chester, Delaware, Lackawanna and 7 more54 min
Apr 28, 11:49 AM EDTMesoscale DiscussionSPCBucks, Chester, Delaware, Lehigh, Monroe, Montgomery and 4 more56 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 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. Warning verification from the Mesonet's Cow. Rebuilt daily.