Alert archive / Pennsylvania / Mesoscale Discussions

Mesoscale Discussions in Pennsylvania, 2019

142 mesoscale discussions in 2019. 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 2019. Tap one for its archive.

Mesoscale Discussions
142
Busiest month
July28 mesoscale discussions
Busiest day
April 14, 20195 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 8, 1:54 PM ESTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Butler, Clarion, Crawford and 8 more2 hr
Jan 19, 2:34 PM ESTMesoscale DiscussionSPCCrawford, Lawrence, Mercer4 hr
Jan 19, 6:24 PM ESTMesoscale DiscussionSPCAdams, Armstrong, Bedford, Blair, Bradford, Cambria and 39 more3 hr
Jan 19, 9:33 PM ESTMesoscale DiscussionSPCBerks, Blair, Bradford, Cambria, Cameron, Carbon and 38 more3 hr
Jan 27, 9:27 AM ESTMesoscale DiscussionSPCBradford, Cameron, Centre, Clearfield, Clinton, Indiana and 8 more6 hr
Jan 29, 5:46 PM ESTMesoscale DiscussionSPCCarbon, Lackawanna, Lehigh, Luzerne, Monroe, Pike and 1 more4 hr
Jan 30, 11:10 AM ESTMesoscale DiscussionSPCBerks, Bucks, Carbon, Chester, Columbia, Delaware and 15 more4 hr
Feb 12, 4:16 AM ESTMesoscale DiscussionSPCAdams, Armstrong, Bedford, Blair, Butler, Cambria and 27 more6 hr
Feb 12, 10:48 AM ESTMesoscale DiscussionSPCBerks, Blair, Bradford, Bucks, Cameron, Carbon and 36 more4 hr
Feb 12, 3:35 PM ESTMesoscale DiscussionSPCBerks, Bradford, Cameron, Carbon, Centre, Clinton and 19 more4 hr
Feb 20, 3:25 AM ESTMesoscale DiscussionSPCBeaver6 hr
Feb 20, 5:55 AM ESTMesoscale DiscussionSPCAdams, Bedford, Blair, Cambria, Cumberland, Fayette and 7 more6 hr
Feb 20, 6:32 PM ESTMesoscale DiscussionSPCAdams, Armstrong, Bedford, Berks, Blair, Bradford and 41 more4 hr
Feb 20, 10:15 PM ESTMesoscale DiscussionSPCBradford, Carbon, Columbia, Lackawanna, Luzerne, Lycoming and 10 more5 hr
Mar 3, 5:41 PM ESTMesoscale DiscussionSPCAdams, Berks, Bucks, Carbon, Chester, Cumberland and 12 more4 hr
Mar 14, 8:26 PM EDTMesoscale DiscussionSPCLawrence94 min
Mar 15, 7:40 PM EDTMesoscale DiscussionSPCBucks, Chester, Delaware, Lancaster, Montgomery2 hr
Apr 14, 3:46 PM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Butler, Clarion, Crawford and 4 more59 min
Apr 14, 4:49 PM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Butler, Cambria, Clarion and 12 more116 min
Apr 14, 5:57 PM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Blair, Butler, Cambria and 21 more63 min
Apr 14, 7:21 PM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Butler, Cambria, Cameron and 17 more54 min
Apr 14, 7:42 PM EDTMesoscale DiscussionSPCYork63 min
Apr 14, 9:14 PM EDTMesoscale DiscussionSPCArmstrong, Bedford, Blair, Cambria, Cameron, Centre and 23 more61 min
Apr 14, 11:56 PM EDTMesoscale DiscussionSPCAdams, Berks, Bradford, Bucks, Carbon, Centre and 33 more2 hr
Apr 15, 12:44 AM EDTMesoscale DiscussionSPCMontour, Northumberland, Snyder, Union61 min
Apr 15, 3:50 AM EDTMesoscale DiscussionSPCBucks, Chester, Delaware, Montgomery, Northampton, Philadelphia55 min
Apr 19, 5:59 PM EDTMesoscale DiscussionSPCAdams, Cumberland, Dauphin, Franklin, Fulton, Huntingdon and 4 more2 hr
Apr 19, 8:29 PM EDTMesoscale DiscussionSPCDelaware91 min
Apr 19, 8:54 PM EDTMesoscale DiscussionSPCAdams, Cumberland, Dauphin, Franklin, Juniata, Lancaster and 6 more96 min
Apr 26, 11:37 AM EDTMesoscale DiscussionSPCAdams, Berks, Bucks, Chester, Cumberland, Dauphin and 9 more113 min
Apr 26, 2:09 PM EDTMesoscale DiscussionSPCAdams, Berks, Bucks, Chester, Cumberland, Dauphin and 12 more2 hr
Apr 26, 4:26 PM EDTMesoscale DiscussionSPCBerks, Bucks, Carbon, Chester, Delaware, Lehigh and 4 more94 min
May 3, 4:45 PM EDTMesoscale DiscussionSPCAdams, Bedford, Fayette, Franklin, Fulton, Greene and 1 more60 min
May 3, 6:27 PM EDTMesoscale DiscussionSPCAdams, Bedford, Cumberland, Dauphin, Franklin, Fulton and 8 more63 min
May 3, 8:29 PM EDTMesoscale DiscussionSPCAdams, York61 min
May 19, 1:27 PM EDTMesoscale DiscussionSPCAdams, Bedford, Berks, Blair, Bradford, Cambria and 36 more2 hr
May 19, 4:41 PM EDTMesoscale DiscussionSPCAdams, Berks, Carbon, Chester, Columbia, Cumberland and 23 more94 min
May 19, 6:55 PM EDTMesoscale DiscussionSPCBerks, Bucks, Carbon, Chester, Delaware, Lehigh and 5 more95 min
May 23, 8:53 AM EDTMesoscale DiscussionSPCBeaver, Butler, Clarion, Crawford, Erie, Forest and 4 more2 hr
May 23, 11:52 AM EDTMesoscale DiscussionSPCAdams, Bedford, Blair, Cambria, Centre, Clinton and 18 more83 min
May 23, 5:44 PM EDTMesoscale DiscussionSPCFayette, Greene, Washington61 min
May 23, 7:10 PM EDTMesoscale DiscussionSPCBradford, Cameron, Carbon, Centre, Clarion, Clearfield and 27 more65 min
May 23, 8:02 PM EDTMesoscale DiscussionSPCFayette, Greene, Washington118 min
May 23, 9:24 PM EDTMesoscale DiscussionSPCAdams, Armstrong, Bedford, Berks, Blair, Bradford and 34 more2 hr
May 25, 12:53 PM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Bedford, Blair, Butler and 21 more2 hr
May 25, 8:16 PM EDTMesoscale DiscussionSPCBedford, Blair, Cambria, Cameron, Centre, Clearfield and 16 more59 min
May 26, 11:14 AM EDTMesoscale DiscussionSPCAdams, Berks, Blair, Bucks, Carbon, Centre and 23 more3 hr
May 26, 1:45 PM EDTMesoscale DiscussionSPCAdams, Franklin, Fulton, York2 hr
May 26, 5:45 PM EDTMesoscale DiscussionSPCAdams, Chester, Delaware, Lancaster, York2 hr
May 28, 1:02 PM EDTMesoscale DiscussionSPCAdams, Allegheny, Armstrong, Beaver, Bedford, Berks and 58 more118 min
May 28, 3:24 PM EDTMesoscale DiscussionSPCCrawford, Lawrence, Mercer2 hr
May 28, 4:43 PM EDTMesoscale DiscussionSPCAdams, Allegheny, Armstrong, Beaver, Bedford, Berks and 59 more2 hr
May 28, 8:07 PM EDTMesoscale DiscussionSPCAdams, Allegheny, Armstrong, Beaver, Bedford, Berks and 56 more113 min
May 29, 12:06 PM EDTMesoscale DiscussionSPCAdams, Allegheny, Armstrong, Beaver, Bedford, Berks and 50 more84 min
May 29, 3:17 PM EDTMesoscale DiscussionSPCAllegheny, Fayette, Greene, Somerset, Washington, Westmoreland118 min
May 29, 3:47 PM EDTMesoscale DiscussionSPCAdams, Bedford, Berks, Blair, Bucks, Carbon and 30 more118 min
May 30, 12:15 PM EDTMesoscale DiscussionSPCAdams, Berks, Bucks, Chester, Cumberland, Dauphin and 15 more2 hr
May 30, 3:56 PM EDTMesoscale DiscussionSPCBerks, Bucks, Chester, Dauphin, Delaware, Lancaster and 7 more64 min
Jun 1, 2:28 PM EDTMesoscale DiscussionSPCCrawford, Elk, Erie, Forest, McKean, Potter and 2 more2 hr
Jun 1, 5:53 PM EDTMesoscale DiscussionSPCArmstrong, Bradford, Butler, Cameron, Centre, Clarion and 21 more97 min
Jun 2, 1:15 PM EDTMesoscale DiscussionSPCBerks, Bucks, Chester, Delaware, Lancaster, Lehigh and 5 more2 hr
Jun 5, 5:28 PM EDTMesoscale DiscussionSPCAllegheny, Beaver, Greene, Washington62 min
Jun 13, 3:51 PM EDTMesoscale DiscussionSPCAdams, Allegheny, Armstrong, Bedford, Blair, Cambria and 9 more114 min
Jun 16, 1:53 PM EDTMesoscale DiscussionSPCAdams, Chester, Delaware, Franklin, Lancaster, Philadelphia and 1 more97 min
Jun 17, 2:03 PM EDTMesoscale DiscussionSPCAdams117 min
Jun 18, 12:23 PM EDTMesoscale DiscussionSPCAdams, Berks, Bucks, Chester, Cumberland, Dauphin and 10 more97 min
Jun 18, 4:47 PM EDTMesoscale DiscussionSPCBucks, Chester, Delaware, Montgomery, Philadelphia88 min
Jun 20, 1:53 PM EDTMesoscale DiscussionSPCAdams, Berks, Bradford, Bucks, Carbon, Chester and 30 more2 hr
Jun 24, 11:48 AM EDTMesoscale DiscussionSPCAllegheny, Beaver, Greene, Washington117 min
Jun 24, 4:42 PM EDTMesoscale DiscussionSPCAllegheny, Beaver, Greene, Washington93 min
Jun 24, 7:17 PM EDTMesoscale DiscussionSPCAdams, Bedford, Blair, Cambria, Cameron, Centre and 21 more2 hr
Jun 26, 1:56 PM EDTMesoscale DiscussionSPCBradford, Cameron, Clarion, Clearfield, Clinton, Crawford and 14 more94 min
Jun 26, 4:50 PM EDTMesoscale DiscussionSPCColumbia, Lackawanna, Luzerne, Lycoming, Montour, Pike and 5 more85 min
Jun 28, 5:59 PM EDTMesoscale DiscussionSPCChester, Delaware, Lancaster, York2 hr
Jun 29, 11:34 AM EDTMesoscale DiscussionSPCBerks, Bradford, Bucks, Cameron, Carbon, Centre and 27 more86 min
Jun 29, 1:45 PM EDTMesoscale DiscussionSPCAdams, Berks, Blair, Bradford, Bucks, Cameron and 37 more90 min
Jun 29, 4:01 PM EDTMesoscale DiscussionSPCBucks, Chester, Delaware, Montgomery, Philadelphia119 min
Jul 2, 3:10 PM EDTMesoscale DiscussionSPCAdams, Allegheny, Armstrong, Beaver, Bedford, Blair and 35 more95 min
Jul 2, 5:53 PM EDTMesoscale DiscussionSPCAdams, Berks, Bucks, Carbon, Chester, Cumberland and 11 more2 hr
Jul 2, 6:18 PM EDTMesoscale DiscussionSPCAllegheny, Beaver, Fayette, Greene, Washington117 min
Jul 4, 12:49 PM EDTMesoscale DiscussionSPCYork116 min
Jul 6, 11:55 AM EDTMesoscale DiscussionSPCBradford, Cameron, Clinton, Lycoming, McKean, Potter and 5 more3 hr
Jul 6, 1:48 PM EDTMesoscale DiscussionSPCAdams, Bedford, Berks, Blair, Bucks, Cambria and 29 more2 hr
Jul 6, 2:36 PM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Butler, Clarion, Crawford and 8 more2 hr
Jul 11, 10:45 AM EDTMesoscale DiscussionSPCAllegheny, Beaver, Butler, Fayette, Greene, Lawrence and 3 more90 min
Jul 11, 12:51 PM EDTMesoscale DiscussionSPCAdams, Berks, Chester, Lancaster, Lebanon, York84 min
Jul 11, 1:31 PM EDTMesoscale DiscussionSPCCrawford, Lawrence, Mercer89 min
Jul 11, 5:59 PM EDTMesoscale DiscussionSPCBucks, Chester, Delaware, Montgomery, Philadelphia2 hr
Jul 16, 3:28 PM EDTMesoscale DiscussionSPCAdams, Cumberland, Dauphin, Franklin, Fulton, Juniata and 3 more3 hr
Jul 17, 1:03 PM EDTMesoscale DiscussionSPCAdams, Berks, Blair, Bradford, Bucks, Cameron and 36 more2 hr
Jul 17, 3:59 PM EDTMesoscale DiscussionSPCBerks, Bradford, Bucks, Carbon, Chester, Columbia and 18 more2 hr
Jul 17, 6:38 PM EDTMesoscale DiscussionSPCBerks, Bucks, Chester, Delaware, Lancaster, Lehigh and 3 more97 min
Jul 18, 1:49 PM EDTMesoscale DiscussionSPCAdams, Berks, Bucks, Chester, Delaware, Lancaster and 6 more2 hr
Jul 19, 1:38 PM EDTMesoscale DiscussionSPCCameron, Crawford, Elk, Erie, Forest, McKean and 4 more2 hr
Jul 19, 4:40 PM EDTMesoscale DiscussionSPCBradford, Butler, Cameron, Clarion, Crawford, Elk and 10 more2 hr
Jul 19, 6:54 PM EDTMesoscale DiscussionSPCBradford, Cameron, Centre, Clarion, Clearfield, Clinton and 22 more96 min
Jul 20, 6:24 PM EDTMesoscale DiscussionSPCLackawanna, Monroe, Pike, Susquehanna, Wayne, Wyoming96 min
Jul 21, 12:00 PM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Butler, Cambria, Fayette and 5 more3 hr
Jul 22, 1:11 PM EDTMesoscale DiscussionSPCAdams, Berks, Bucks, Carbon, Chester, Cumberland and 13 more94 min
Jul 22, 4:20 PM EDTMesoscale DiscussionSPCBerks, Bucks, Chester, Delaware, Lancaster, Lebanon and 7 more115 min
Jul 22, 8:51 PM EDTMesoscale DiscussionSPCAdams, Berks, Bucks, Chester, Cumberland, Dauphin and 10 more84 min
Jul 28, 3:19 PM EDTMesoscale DiscussionSPCBradford, Cameron, Lackawanna, Lycoming, McKean, Potter and 6 more116 min
Jul 30, 12:59 PM EDTMesoscale DiscussionSPCBedford, Blair, Bradford, Cambria, Cameron, Centre and 14 more2 hr
Jul 30, 4:22 PM EDTMesoscale DiscussionSPCBradford, Carbon, Columbia, Lackawanna, Luzerne, Lycoming and 10 more113 min
Jul 31, 4:19 PM EDTMesoscale DiscussionSPCBucks, Chester, Delaware, Montgomery, Philadelphia56 min
Aug 3, 1:02 PM EDTMesoscale DiscussionSPCBradford, Lackawanna, Luzerne, Lycoming, Pike, Potter and 5 more2 hr
Aug 7, 1:02 PM EDTMesoscale DiscussionSPCAdams, Berks, Bucks, Carbon, Chester, Columbia and 18 more88 min
Aug 7, 3:57 PM EDTMesoscale DiscussionSPCBerks, Bucks, Carbon, Chester, Delaware, Lancaster and 8 more93 min
Aug 7, 6:56 PM EDTMesoscale DiscussionSPCPhiladelphia64 min
Aug 8, 11:58 AM EDTMesoscale DiscussionSPCBradford, Cameron, Elk, McKean, Potter, Sullivan and 3 more92 min
Aug 15, 1:15 PM EDTMesoscale DiscussionSPCAdams, Allegheny, Armstrong, Beaver, Bedford, Blair and 39 more2 hr
Aug 16, 1:28 PM EDTMesoscale DiscussionSPCAdams, Berks, Bradford, Carbon, Chester, Clinton and 27 more2 hr
Aug 17, 1:27 PM EDTMesoscale DiscussionSPCBerks, Bradford, Bucks, Carbon, Chester, Columbia and 23 more2 hr
Aug 17, 6:44 PM EDTMesoscale DiscussionSPCArmstrong, Blair, Bradford, Cambria, Centre, Clearfield and 20 more2 hr
Aug 18, 12:55 PM EDTMesoscale DiscussionSPCBradford, Cameron, Centre, Clearfield, Clinton, Columbia and 14 more65 min
Aug 18, 6:11 PM EDTMesoscale DiscussionSPCBerks, Bucks, Carbon, Columbia, Lackawanna, Lehigh and 7 more2 hr
Aug 20, 2:19 PM EDTMesoscale DiscussionSPCAdams, Franklin, Fulton, York56 min
Aug 20, 7:00 PM EDTMesoscale DiscussionSPCAdams, York2 hr
Aug 21, 11:31 AM EDTMesoscale DiscussionSPCBerks, Bucks, Carbon, Chester, Delaware, Lancaster and 6 more119 min
Aug 22, 2:53 PM EDTMesoscale DiscussionSPCBlair, Cambria, Carbon, Centre, Clearfield, Clinton and 16 more2 hr
Sep 1, 7:26 PM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Butler, Cambria, Cameron and 15 more94 min
Sep 2, 2:01 PM EDTMesoscale DiscussionSPCAdams, Berks, Bucks, Chester, Cumberland, Delaware and 7 more119 min
Sep 2, 3:58 PM EDTMesoscale DiscussionSPCCarbon, Centre, Columbia, Juniata, Lackawanna, Luzerne and 13 more3 hr
Sep 4, 11:19 AM EDTMesoscale DiscussionSPCBradford, Susquehanna, Wayne116 min
Sep 4, 3:27 PM EDTMesoscale DiscussionSPCMonroe, Northampton, Pike93 min
Sep 11, 3:08 PM EDTMesoscale DiscussionSPCAdams, Allegheny, Armstrong, Beaver, Bedford, Blair and 35 more2 hr
Sep 12, 2:02 PM EDTMesoscale DiscussionSPCAdams, Berks, Blair, Bucks, Centre, Chester and 22 more118 min
Sep 23, 3:23 PM EDTMesoscale DiscussionSPCBradford, McKean, Potter, Susquehanna, Tioga97 min
Sep 28, 5:51 PM EDTMesoscale DiscussionSPCAdams, Allegheny, Armstrong, Beaver, Bedford, Berks and 39 more114 min
Oct 31, 11:12 AM EDTMesoscale DiscussionSPCFayette, Greene, Somerset2 hr
Oct 31, 1:11 PM EDTMesoscale DiscussionSPCBedford, Franklin, Fulton, Huntingdon3 hr
Oct 31, 4:01 PM EDTMesoscale DiscussionSPCAdams, Cumberland, Franklin, Fulton, Lebanon, York119 min
Oct 31, 4:46 PM EDTMesoscale DiscussionSPCBradford, Lackawanna, Pike, Susquehanna, Wayne119 min
Oct 31, 7:14 PM EDTMesoscale DiscussionSPCAdams, Berks, Bucks, Carbon, Chester, Cumberland and 11 more2 hr
Oct 31, 8:21 PM EDTMesoscale DiscussionSPCBradford, Lackawanna, Lycoming, Pike, Sullivan, Susquehanna and 2 more54 min
Oct 31, 9:58 PM EDTMesoscale DiscussionSPCBerks, Bucks, Chester, Delaware, Lehigh, Monroe and 3 more2 hr
Dec 1, 5:45 AM ESTMesoscale DiscussionSPCAdams, Bedford, Blair, Cambria, Cameron, Centre and 22 more6 hr
Dec 10, 2:21 PM ESTMesoscale DiscussionSPCErie4 hr
Dec 11, 3:57 PM ESTMesoscale DiscussionSPCErie4 hr
Dec 17, 11:06 AM ESTMesoscale DiscussionSPCLackawanna, Pike, Susquehanna, Wayne5 hr
Dec 31, 1:47 PM ESTMesoscale DiscussionSPCPotter, Tioga3 hr
Dec 31, 4:31 PM ESTMesoscale DiscussionSPCBradford, Lackawanna, Lycoming, Sullivan, Susquehanna, Wayne and 1 more4 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. April 14, 20195mesoscale discussions
  2. October 31, 20195mesoscale discussions
  3. April 15, 20194mesoscale discussions
  4. May 23, 20194mesoscale discussions
  5. May 26, 20194mesoscale discussions
  6. May 29, 20194mesoscale discussions
  7. July 11, 20194mesoscale discussions
  8. February 12, 20193mesoscale discussions
  9. February 20, 20193mesoscale discussions
  10. April 26, 20193mesoscale discussions
  11. May 19, 20193mesoscale discussions
  12. May 28, 20193mesoscale discussions

Nearby

Alerts in force nowTornadoes on recordThe radar archive20182020

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.