Alert archive / Pennsylvania / Mesoscale Discussions / 2004

Mesoscale Discussions in Pennsylvania, May 2004

57 mesoscale discussions in May 2004. 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 2004. Tap one for its archive.

Mesoscale Discussions
57
Busiest day
May 24, 20047 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 1, 12:56 PM EDTMesoscale DiscussionSPCBradford, Lackawanna, Lycoming, Sullivan, Susquehanna, Tioga and 1 more2 hr
May 1, 2:48 PM EDTMesoscale DiscussionSPCBeaver, Lawrence117 min
May 2, 1:21 PM EDTMesoscale DiscussionSPCAdams, Bedford, Blair, Bradford, Cambria, Cameron and 21 more114 min
May 2, 5:48 PM EDTMesoscale DiscussionSPCAdams, Bradford, Columbia, Cumberland, Dauphin, Franklin and 12 more117 min
May 2, 6:54 PM EDTMesoscale DiscussionSPCLackawanna, Luzerne, Monroe, Pike, Susquehanna, Wayne and 1 more96 min
May 5, 1:48 PM EDTMesoscale DiscussionSPCAdams, Berks, Chester, Cumberland, Dauphin, Franklin and 6 more2 hr
May 6, 11:05 PM EDTMesoscale DiscussionSPCClarion, Crawford, Erie, Forest, Lawrence, McKean and 3 more85 min
May 7, 3:13 AM EDTMesoscale DiscussionSPCArmstrong, Beaver, Butler, Clarion, Clearfield, Crawford and 9 more62 min
May 7, 10:29 AM EDTMesoscale DiscussionSPCAdams, Allegheny, Beaver, Bedford, Blair, Cambria and 14 more91 min
May 7, 1:24 PM EDTMesoscale DiscussionSPCBerks, Bucks, Chester, Delaware, Montgomery, Philadelphia96 min
May 7, 1:49 PM EDTMesoscale DiscussionSPCBedford, Fayette, Franklin, Fulton, Greene, Huntingdon and 3 more86 min
May 8, 6:28 PM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Butler, Clarion, Crawford and 14 more3 hr
May 9, 12:12 PM EDTMesoscale DiscussionSPCAdams, Bedford, Franklin, Fulton3 hr
May 9, 1:43 PM EDTMesoscale DiscussionSPCArmstrong, Berks, Blair, Cambria, Cameron, Carbon and 24 more2 hr
May 9, 8:08 PM EDTMesoscale DiscussionSPCAdams, Chester, Cumberland, Dauphin, Delaware, Lancaster and 2 more2 hr
May 10, 12:04 PM EDTMesoscale DiscussionSPCAdams, Allegheny, Beaver, Bedford, Blair, Butler and 21 more2 hr
May 10, 3:14 PM EDTMesoscale DiscussionSPCClarion, Crawford, Elk, Forest, Lawrence, McKean and 5 more3 hr
May 10, 11:08 PM EDTMesoscale DiscussionSPCCarbon, Monroe, Northampton3 hr
May 11, 11:53 AM EDTMesoscale DiscussionSPCBerks, Bucks, Carbon, Lackawanna, Lehigh, Luzerne and 4 more3 hr
May 15, 6:05 PM EDTMesoscale DiscussionSPCBerks, Bucks, Carbon, Chester, Delaware, Lancaster and 8 more85 min
May 17, 6:50 PM EDTMesoscale DiscussionSPCCrawford, Erie, Forest, Lawrence, Mercer, Venango and 1 more85 min
May 18, 12:54 PM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Blair, Butler, Cambria and 22 more66 min
May 18, 1:04 PM EDTMesoscale DiscussionSPCBradford, Lackawanna, Luzerne, Sullivan, Susquehanna, Wayne and 1 more56 min
May 18, 2:54 PM EDTMesoscale DiscussionSPCAdams, Bedford, Berks, Blair, Bucks, Cambria and 33 more96 min
May 18, 6:24 PM EDTMesoscale DiscussionSPCBradford, Cameron, Elk, Jefferson, McKean, Potter and 2 more2 hr
May 18, 7:09 PM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Butler, Fayette, Greene and 3 more96 min
May 18, 7:49 PM EDTMesoscale DiscussionSPCChester, Delaware, Lancaster, Montgomery, Philadelphia, York2 hr
May 19, 2:52 AM EDTMesoscale DiscussionSPCChester, Delaware, Lancaster, Montgomery, Philadelphia, York3 hr
May 20, 6:25 PM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Butler, Cambria, Clarion and 13 more95 min
May 21, 2:40 AM EDTMesoscale DiscussionSPCBeaver, Butler, Lawrence, Mercer65 min
May 21, 4:45 AM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Butler, Fayette, Greene and 4 more60 min
May 21, 2:19 PM EDTMesoscale DiscussionSPCBeaver, Crawford, Erie, Lawrence, Mercer116 min
May 21, 6:53 PM EDTMesoscale DiscussionSPCAdams, Allegheny, Armstrong, Bedford, Berks, Blair and 47 more97 min
May 22, 2:25 AM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Butler, Clarion, Crawford and 10 more2 hr
May 22, 1:26 PM EDTMesoscale DiscussionSPCCameron, Clarion, Crawford, Elk, Forest, Jefferson and 5 more94 min
May 22, 5:23 PM EDTMesoscale DiscussionSPCBradford, Forest, McKean, Potter, Susquehanna, Tioga and 2 more97 min
May 22, 8:18 PM EDTMesoscale DiscussionSPCArmstrong, Beaver, Bradford, Butler, Cameron, Clarion and 15 more117 min
May 23, 12:04 AM EDTMesoscale DiscussionSPCBradford, Clinton, Susquehanna, Tioga56 min
May 23, 3:27 PM EDTMesoscale DiscussionSPCMcKean2 hr
May 23, 6:45 PM EDTMesoscale DiscussionSPCBradford, Carbon, Clinton, Columbia, Lackawanna, Luzerne and 11 more90 min
May 24, 2:09 AM EDTMesoscale DiscussionSPCGreene, Washington2 hr
May 24, 4:55 AM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Butler, Clarion, Crawford and 10 more95 min
May 24, 10:03 AM EDTMesoscale DiscussionSPCBedford, Berks, Blair, Bradford, Bucks, Carbon and 31 more117 min
May 24, 12:24 PM EDTMesoscale DiscussionSPCBlair, Bradford, Cambria, Cameron, Centre, Clearfield and 12 more2 hr
May 24, 3:00 PM EDTMesoscale DiscussionSPCBerks, Bucks, Carbon, Columbia, Lackawanna, Lehigh and 11 more90 min
May 24, 5:43 PM EDTMesoscale DiscussionSPCAdams, Berks, Bradford, Bucks, Carbon, Chester and 27 more47 min
May 24, 7:25 PM EDTMesoscale DiscussionSPCBerks, Bradford, Bucks, Carbon, Chester, Columbia and 24 more95 min
May 25, 12:54 PM EDTMesoscale DiscussionSPCAllegheny, Beaver, Crawford, Greene, Lawrence, Mercer and 1 more96 min
May 25, 2:58 PM EDTMesoscale DiscussionSPCBedford, Blair, Cambria, Fayette, Franklin, Fulton and 4 more92 min
May 25, 3:57 PM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Butler, Clarion, Fayette and 6 more63 min
May 25, 6:09 PM EDTMesoscale DiscussionSPCAdams, Bedford, Berks, Blair, Bucks, Cambria and 15 more2 hr
May 26, 12:55 PM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Bedford, Blair, Bradford, Cambria and 23 more95 min
May 26, 5:15 PM EDTMesoscale DiscussionSPCAdams, Berks, Bradford, Carbon, Chester, Columbia and 20 more2 hr
May 27, 3:07 PM EDTMesoscale DiscussionSPCAdams, Franklin, York113 min
May 27, 7:13 PM EDTMesoscale DiscussionSPCGreene, Washington92 min
May 31, 2:40 AM EDTMesoscale DiscussionSPCFayette, Greene, Somerset2 hr
May 31, 4:40 AM EDTMesoscale DiscussionSPCFayette, Greene, Somerset95 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 archive20032005

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.