Alert archive / Pennsylvania / Mesoscale Discussions / 2011

Mesoscale Discussions in Pennsylvania, May 2011

31 mesoscale discussions in May 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 May 2011. Tap one for its archive.

Mesoscale Discussions
31
Busiest day
May 18, 20114 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
May 3, 2:27 PM EDTMesoscale DiscussionSPCAdams, Bedford, Berks, Bradford, Carbon, Columbia and 27 more2 hr
May 3, 6:51 PM EDTMesoscale DiscussionSPCAdams, Bedford, Berks, Bradford, Carbon, Centre and 30 more84 min
May 12, 10:30 AM EDTMesoscale DiscussionSPCGreene90 min
May 12, 6:52 PM EDTMesoscale DiscussionSPCBeaver, Greene, Lawrence, Mercer
May 17, 6:27 PM EDTMesoscale DiscussionSPCAdams, Cumberland, Franklin, Fulton, Lancaster, York2 hr
May 18, 11:55 AM EDTMesoscale DiscussionSPCAdams, Allegheny, Beaver, Bedford, Blair, Cambria and 8 more65 min
May 18, 2:34 PM EDTMesoscale DiscussionSPCBerks, Bucks, Carbon, Columbia, Lackawanna, Lebanon and 12 more56 min
May 18, 3:08 PM EDTMesoscale DiscussionSPCAdams, Allegheny, Armstrong, Beaver, Bedford, Berks and 43 more67 min
May 18, 6:01 PM EDTMesoscale DiscussionSPCAdams, Allegheny, Beaver, Bedford, Butler, Fayette and 7 more89 min
May 19, 10:47 AM EDTMesoscale DiscussionSPCBerks, Bradford, Bucks, Carbon, Lackawanna, Lehigh and 9 more88 min
May 19, 2:17 PM EDTMesoscale DiscussionSPCBerks, Bradford, Bucks, Carbon, Chester, Columbia and 23 more58 min
May 19, 5:02 PM EDTMesoscale DiscussionSPCBerks, Bucks, Carbon, Chester, Dauphin, Delaware and 12 more58 min
May 23, 8:25 AM EDTMesoscale DiscussionSPCCrawford, Erie65 min
May 23, 10:33 AM EDTMesoscale DiscussionSPCAdams, Armstrong, Bedford, Blair, Cambria, Cameron and 21 more87 min
May 23, 2:33 PM EDTMesoscale DiscussionSPCAdams, Bedford, Blair, Cambria, Centre, Clearfield and 12 more87 min
May 23, 4:40 PM EDTMesoscale DiscussionSPCAdams, Berks, Bradford, Carbon, Chester, Columbia and 22 more95 min
May 23, 8:07 PM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Butler, Clarion, Crawford and 9 more83 min
May 24, 1:34 PM EDTMesoscale DiscussionSPCBerks, Bradford, Bucks, Carbon, Columbia, Lackawanna and 11 more116 min
May 25, 4:45 PM EDTMesoscale DiscussionSPCBeaver, Butler, Lawrence, Mercer60 min
May 25, 8:14 PM EDTMesoscale DiscussionSPCCrawford, Lawrence, Mercer2 hr
May 26, 2:37 AM EDTMesoscale DiscussionSPCBeaver, Lawrence83 min
May 26, 11:55 AM EDTMesoscale DiscussionSPCBradford, Clinton, Columbia, Dauphin, Juniata, Lackawanna and 13 more95 min
May 26, 5:49 PM EDTMesoscale DiscussionSPCAdams, Armstrong, Bedford, Blair, Bradford, Cambria and 41 more56 min
May 26, 8:54 PM EDTMesoscale DiscussionSPCAdams, Berks, Bradford, Carbon, Columbia, Cumberland and 21 more66 min
May 27, 12:24 PM EDTMesoscale DiscussionSPCAdams, Berks, Bradford, Carbon, Columbia, Cumberland and 25 more96 min
May 27, 6:14 PM EDTMesoscale DiscussionSPCAdams, Bedford, Berks, Bradford, Carbon, Centre and 31 more2 hr
May 29, 6:05 PM EDTMesoscale DiscussionSPCCrawford, Erie, Mercer, Warren25 min
May 29, 7:28 PM EDTMesoscale DiscussionSPCClarion, Crawford, Elk, Erie, Forest, McKean and 3 more62 min
May 29, 9:47 PM EDTMesoscale DiscussionSPCArmstrong, Butler, Cameron, Centre, Clarion, Clearfield and 11 more58 min
May 30, 3:46 AM EDTMesoscale DiscussionSPCBucks, Carbon, Columbia, Lackawanna, Lehigh, Luzerne and 8 more119 min
May 31, 4:07 PM EDTMesoscale DiscussionSPCCrawford, Mercer, Venango113 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.