Alert archive / Pennsylvania / Mesoscale Discussions

Mesoscale Discussions in Pennsylvania, 2004

166 mesoscale discussions in 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 2004. Tap one for its archive.

Mesoscale Discussions
166
Busiest month
May57 mesoscale discussions
Busiest day
May 24, 20047 mesoscale discussions

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
Jan 4, 6:39 PM ESTMesoscale DiscussionSPCBradford, Crawford, McKean, Potter, Tioga, Warren6 hr
Jan 14, 3:45 PM ESTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Bedford, Butler, Cambria and 16 more5 hr
Jan 14, 6:43 PM ESTMesoscale DiscussionSPCBerks, Bucks, Carbon, Chester, Columbia, Cumberland and 19 more6 hr
Jan 17, 1:22 PM ESTMesoscale DiscussionSPCGreene5 hr
Jan 17, 8:40 PM ESTMesoscale DiscussionSPCYork6 hr
Jan 25, 6:06 PM ESTMesoscale DiscussionSPCAllegheny, Bedford, Fayette, Fulton, Greene, Somerset and 2 more4 hr
Jan 25, 11:25 PM ESTMesoscale DiscussionSPCDelaware, Philadelphia2 hr
Jan 27, 3:36 AM ESTMesoscale DiscussionSPCCrawford, Erie, Mercer, Warren4 hr
Jan 27, 7:40 AM ESTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Butler, Clarion, Crawford and 7 more4 hr
Jan 27, 10:01 AM ESTMesoscale DiscussionSPCAdams, Bedford, Blair, Cambria, Cameron, Centre and 23 more4 hr
Jan 27, 5:28 PM ESTMesoscale DiscussionSPCBerks, Bradford, Bucks, Carbon, Chester, Columbia and 17 more5 hr
Feb 2, 8:58 PM ESTMesoscale DiscussionSPCBedford, Somerset, Westmoreland5 hr
Feb 3, 4:28 AM ESTMesoscale DiscussionSPCAllegheny, Armstrong, Bedford, Blair, Bradford, Butler and 30 more3 hr
Feb 3, 11:45 AM ESTMesoscale DiscussionSPCBradford, Carbon, Lackawanna, Luzerne, Monroe, Northampton and 5 more6 hr
Feb 5, 11:16 AM ESTMesoscale DiscussionSPCGreene, Washington6 hr
Feb 5, 4:41 PM ESTMesoscale DiscussionSPCAdams, Allegheny, Armstrong, Beaver, Bedford, Blair and 29 more6 hr
Feb 6, 12:04 AM ESTMesoscale DiscussionSPCAdams, Armstrong, Bedford, Berks, Blair, Butler and 41 more6 hr
Feb 6, 8:03 AM ESTMesoscale DiscussionSPCAdams, Berks, Bradford, Bucks, Carbon, Chester and 30 more5 hr
Mar 16, 5:14 AM ESTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Bedford, Blair, Butler and 24 more5 hr
Mar 16, 8:17 AM ESTMesoscale DiscussionSPCBerks, Carbon, Columbia, Lackawanna, Lebanon, Lehigh and 8 more5 hr
Mar 18, 6:08 PM ESTMesoscale DiscussionSPCAdams, Bedford, Berks, Blair, Bucks, Cambria and 22 more5 hr
Apr 18, 2:17 PM EDTMesoscale DiscussionSPCSusquehanna, Wayne118 min
Apr 21, 12:48 PM EDTMesoscale DiscussionSPCBeaver, Butler, Clarion, Crawford, Erie, Forest and 5 more2 hr
Apr 25, 11:42 AM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Butler, Clarion, Fayette and 9 more2 hr
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
Jun 1, 11:11 AM EDTMesoscale DiscussionSPCAdams, Bedford, Berks, Blair, Bradford, Bucks and 39 more64 min
Jun 1, 4:22 PM EDTMesoscale DiscussionSPCAdams, Bedford, Berks, Blair, Bradford, Bucks and 37 more53 min
Jun 1, 4:56 PM EDTMesoscale DiscussionSPCAllegheny, Beaver, Fayette, Greene, Washington34 min
Jun 2, 11:45 AM EDTMesoscale DiscussionSPCAdams, Allegheny, Armstrong, Beaver, Bedford, Berks and 49 more2 hr
Jun 9, 3:44 PM EDTMesoscale DiscussionSPCCrawford, Erie, Forest, Lawrence, McKean, Mercer and 3 more91 min
Jun 9, 5:27 PM EDTMesoscale DiscussionSPCCrawford, Erie, Forest, McKean, Mercer, Venango and 1 more63 min
Jun 9, 6:54 PM EDTMesoscale DiscussionSPCButler, Clarion, Crawford, Elk, Forest, Lawrence and 5 more96 min
Jun 9, 8:12 PM EDTMesoscale DiscussionSPCBeaver, Butler, Clarion, Jefferson, Lawrence, Mercer and 1 more63 min
Jun 10, 1:31 PM EDTMesoscale DiscussionSPCAdams, Bedford, Berks, Blair, Bucks, Cambria and 25 more119 min
Jun 10, 4:56 PM EDTMesoscale DiscussionSPCBucks, Chester, Delaware, Lancaster, Montgomery, Philadelphia and 1 more94 min
Jun 13, 8:30 PM EDTMesoscale DiscussionSPCCrawford, Erie90 min
Jun 13, 11:08 PM EDTMesoscale DiscussionSPCBeaver, Butler, Crawford, Erie, Forest, Lawrence and 3 more97 min
Jun 14, 2:40 AM EDTMesoscale DiscussionSPCAllegheny, Beaver, Washington2 hr
Jun 14, 11:22 AM EDTMesoscale DiscussionSPCBeaver, Butler, Clarion, Crawford, Elk, Erie and 8 more53 min
Jun 14, 3:20 PM EDTMesoscale DiscussionSPCCameron, Clarion, Crawford, Elk, Erie, Forest and 6 more115 min
Jun 14, 4:45 PM EDTMesoscale DiscussionSPCAdams, Berks, Bucks, Chester, Cumberland, Dauphin and 10 more2 hr
Jun 14, 8:03 PM EDTMesoscale DiscussionSPCArmstrong, Beaver, Butler, Cameron, Clarion, Elk and 8 more87 min
Jun 14, 10:13 PM EDTMesoscale DiscussionSPCAdams, Berks, Bradford, Carbon, Columbia, Cumberland and 23 more62 min
Jun 15, 2:22 PM EDTMesoscale DiscussionSPCAllegheny, Beaver, Butler, Greene, Lawrence, Washington113 min
Jun 15, 3:55 PM EDTMesoscale DiscussionSPCAdams, Berks, Bradford, Bucks, Cameron, Carbon and 37 more95 min
Jun 17, 12:05 PM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Blair, Bradford, Butler and 33 more115 min
Jun 17, 4:22 PM EDTMesoscale DiscussionSPCAdams, Bedford, Berks, Blair, Bucks, Cambria and 37 more83 min
Jun 17, 7:37 PM EDTMesoscale DiscussionSPCAdams, Berks, Bucks, Carbon, Chester, Delaware and 7 more53 min
Jun 22, 12:08 PM EDTMesoscale DiscussionSPCAdams, Chester, Cumberland, Franklin, Fulton, Lancaster and 2 more97 min
Jun 22, 4:16 PM EDTMesoscale DiscussionSPCBucks, Chester, Delaware, Lancaster, Montgomery, Philadelphia and 1 more89 min
Jun 22, 7:04 PM EDTMesoscale DiscussionSPCDelaware, Philadelphia56 min
Jun 24, 3:11 PM EDTMesoscale DiscussionSPCCrawford, Erie, Mercer, Venango94 min
Jun 24, 7:44 PM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Butler, Cambria, Cameron and 14 more2 hr
Jun 24, 10:28 PM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Blair, Butler, Cambria and 23 more2 hr
Jun 25, 1:08 PM EDTMesoscale DiscussionSPCAdams, Bucks, Chester, Delaware, Lancaster, Montgomery and 2 more2 hr
Jun 25, 4:14 PM EDTMesoscale DiscussionSPCAdams, Berks, Chester, Delaware, Lancaster, Montgomery and 2 more2 hr
Jul 1, 11:50 AM EDTMesoscale DiscussionSPCDelaware, York115 min
Jul 4, 11:08 AM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Butler, Cambria, Cameron and 17 more3 hr
Jul 4, 3:00 PM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Butler, Cambria, Cameron and 18 more2 hr
Jul 4, 4:55 PM EDTMesoscale DiscussionSPCBedford, Blair, Cambria, Cameron, Clearfield, Elk and 9 more65 min
Jul 4, 7:29 PM EDTMesoscale DiscussionSPCCameron, Centre, Clinton, Potter, Tioga61 min
Jul 7, 2:35 PM EDTMesoscale DiscussionSPCAdams, Berks, Chester, Cumberland, Dauphin, Lancaster and 3 more55 min
Jul 8, 2:33 PM EDTMesoscale DiscussionSPCLackawanna, Monroe, Pike, Wayne117 min
Jul 12, 2:41 PM EDTMesoscale DiscussionSPCAdams, Lancaster, York2 hr
Jul 14, 12:06 PM EDTMesoscale DiscussionSPCAdams, Allegheny, Armstrong, Bedford, Blair, Butler and 35 more2 hr
Jul 14, 3:16 PM EDTMesoscale DiscussionSPCSusquehanna, Wayne, Wyoming89 min
Jul 14, 3:40 PM EDTMesoscale DiscussionSPCAdams, Bedford, Berks, Blair, Carbon, Centre and 28 more95 min
Jul 31, 12:32 PM EDTMesoscale DiscussionSPCLackawanna, Luzerne, Monroe, Pike, Susquehanna, Wayne and 1 more118 min
Jul 31, 4:06 PM EDTMesoscale DiscussionSPCAdams, Berks, Carbon, Columbia, Cumberland, Dauphin and 19 more84 min
Aug 4, 10:39 AM EDTMesoscale DiscussionSPCAllegheny, Beaver, Fayette, Greene, Washington, Westmoreland2 hr
Aug 4, 2:31 PM EDTMesoscale DiscussionSPCAllegheny, Bedford, Blair, Cambria, Centre, Clearfield and 13 more119 min
Aug 4, 5:48 PM EDTMesoscale DiscussionSPCAdams, Berks, Bucks, Carbon, Chester, Cumberland and 11 more117 min
Aug 10, 11:54 AM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Bedford, Blair, Butler, Cambria and 24 more96 min
Aug 10, 4:16 PM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Bradford, Butler, Cameron and 21 more89 min
Aug 10, 7:27 PM EDTMesoscale DiscussionSPCBradford, Centre, Clearfield, Clinton, Lycoming, Sullivan and 3 more93 min
Aug 11, 11:59 AM EDTMesoscale DiscussionSPCBucks, Chester, Delaware, Lehigh, Monroe, Montgomery and 4 more91 min
Aug 11, 7:00 PM EDTMesoscale DiscussionSPCBerks, Bucks, Carbon, Chester, Delaware, Lancaster and 8 more90 min
Aug 12, 12:00 PM EDTMesoscale DiscussionSPCBucks, Carbon, Lackawanna, Lehigh, Monroe, Montgomery and 5 more90 min
Aug 17, 8:48 PM EDTMesoscale DiscussionSPCCrawford, Erie, Mercer117 min
Aug 18, 1:24 PM EDTMesoscale DiscussionSPCBucks, Chester, Delaware, Lancaster, Lehigh, Montgomery and 2 more96 min
Aug 18, 6:01 PM EDTMesoscale DiscussionSPCBeaver, Crawford, Lawrence, Mercer, Venango89 min
Aug 19, 1:41 PM EDTMesoscale DiscussionSPCAllegheny, Beaver, Fayette, Greene, Indiana, Washington and 1 more64 min
Aug 19, 5:02 PM EDTMesoscale DiscussionSPCAdams, Allegheny, Armstrong, Beaver, Bedford, Blair and 16 more88 min
Aug 19, 7:26 PM EDTMesoscale DiscussionSPCAllegheny, Washington, Westmoreland64 min
Aug 19, 8:28 PM EDTMesoscale DiscussionSPCAdams92 min
Aug 20, 11:56 AM EDTMesoscale DiscussionSPCBradford, Centre, Clinton, Columbia, Lackawanna, Luzerne and 10 more2 hr
Aug 20, 3:41 PM EDTMesoscale DiscussionSPCBlair, Bradford, Cambria, Cameron, Carbon, Centre and 27 more2 hr
Aug 20, 4:03 PM EDTMesoscale DiscussionSPCAdams, Bedford, Berks, Cumberland, Franklin, Fulton and 4 more2 hr
Aug 20, 7:15 PM EDTMesoscale DiscussionSPCCambria, Clearfield, Indiana, Somerset, Westmoreland90 min
Aug 20, 8:22 PM EDTMesoscale DiscussionSPCBradford, Carbon, Centre, Clinton, Columbia, Cumberland and 24 more83 min
Aug 21, 11:48 AM EDTMesoscale DiscussionSPCBerks, Bucks, Chester, Delaware, Lancaster, Lehigh and 4 more117 min
Aug 21, 3:08 PM EDTMesoscale DiscussionSPCBucks, Delaware, Philadelphia2 hr
Aug 21, 4:35 PM EDTMesoscale DiscussionSPCBucks, Delaware, Philadelphia85 min
Sep 8, 8:30 PM EDTMesoscale DiscussionSPCAdams, Franklin, Fulton2 hr
Sep 9, 2:05 AM EDTMesoscale DiscussionSPCBerks, Bucks, Chester, Delaware, Lancaster, Lehigh and 2 more2 hr
Sep 17, 3:33 PM EDTMesoscale DiscussionSPCAdams, Lancaster, York117 min
Sep 17, 9:58 PM EDTMesoscale DiscussionSPCAdams, Franklin, Fulton, Lancaster, York2 hr
Sep 18, 2:39 AM EDTMesoscale DiscussionSPCBucks, Chester, Delaware, Lehigh, Monroe, Montgomery and 2 more2 hr
Sep 18, 5:10 AM EDTMesoscale DiscussionSPCBerks, Bucks, Carbon, Chester, Columbia, Dauphin and 15 more2 hr
Sep 28, 1:49 PM EDTMesoscale DiscussionSPCChester, Delaware, Philadelphia116 min
Sep 28, 4:36 PM EDTMesoscale DiscussionSPCBerks, Bucks, Carbon, Chester, Delaware, Lancaster and 6 more114 min
Oct 2, 3:49 PM EDTMesoscale DiscussionSPCBedford, Blair, Centre, Franklin, Fulton, Huntingdon and 6 more116 min
Nov 25, 7:12 AM ESTMesoscale DiscussionSPCAdams, Berks, Bradford, Bucks, Carbon, Chester and 25 more63 min
Dec 6, 6:48 AM ESTMesoscale DiscussionSPCBradford, Cameron, Clinton, Elk, Lycoming, McKean and 5 more6 hr
Dec 13, 2:12 PM ESTMesoscale DiscussionSPCCrawford4 hr
Dec 19, 1:05 PM ESTMesoscale DiscussionSPCCambria, Fayette, Greene, Indiana, Somerset, Westmoreland4 hr
Dec 22, 1:01 PM ESTMesoscale DiscussionSPCCrawford, Erie, Lawrence, Mercer, Venango, Warren5 hr
Dec 22, 7:18 PM ESTMesoscale DiscussionSPCCrawford, Erie, Lawrence, Mercer, Venango, Warren5 hr
Dec 23, 1:57 AM ESTMesoscale DiscussionSPCCrawford, Erie, Mercer5 hr
Dec 23, 7:01 AM ESTMesoscale DiscussionSPCCrawford, Erie4 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. May 24, 20047mesoscale discussions
  2. May 18, 20046mesoscale discussions
  3. June 14, 20046mesoscale discussions
  4. May 7, 20045mesoscale discussions
  5. August 20, 20045mesoscale discussions
  6. January 27, 20044mesoscale discussions
  7. May 21, 20044mesoscale discussions
  8. May 23, 20044mesoscale discussions
  9. May 25, 20044mesoscale discussions
  10. June 15, 20044mesoscale discussions
  11. July 4, 20044mesoscale discussions
  12. August 21, 20044mesoscale discussions

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.