Alert archive / Pennsylvania / Mesoscale Discussions

Mesoscale Discussions in Pennsylvania, 2015

93 mesoscale discussions in 2015. 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 2015. Tap one for its archive.

Mesoscale Discussions
93
Busiest month
June36 mesoscale discussions
Busiest day
June 23, 20157 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 3, 9:59 AM ESTMesoscale DiscussionSPCBedford, Blair, Bradford, Cambria, Cameron, Centre and 30 more4 hr
Jan 23, 11:48 PM ESTMesoscale DiscussionSPCBerks, Bucks, Carbon, Columbia, Dauphin, Juniata and 15 more6 hr
Feb 1, 2:35 PM ESTMesoscale DiscussionSPCCrawford, Erie6 hr
Feb 1, 9:52 PM ESTMesoscale DiscussionSPCBradford, Lackawanna, McKean, Pike, Potter, Sullivan and 5 more6 hr
Feb 2, 4:00 AM ESTMesoscale DiscussionSPCWayne6 hr
Feb 14, 1:33 PM ESTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Bedford, Blair, Butler and 17 more4 hr
Feb 21, 6:24 PM ESTMesoscale DiscussionSPCBerks, Bucks, Chester, Delaware, Lancaster, Lehigh and 4 more4 hr
Mar 1, 1:57 PM ESTMesoscale DiscussionSPCBerks, Bucks, Chester, Delaware, Lancaster, Lehigh and 3 more5 hr
Mar 3, 7:01 PM ESTMesoscale DiscussionSPCBerks, Bucks, Carbon, Chester, Columbia, Cumberland and 23 more4 hr
Mar 4, 11:00 PM ESTMesoscale DiscussionSPCGreene6 hr
Mar 5, 7:58 AM ESTMesoscale DiscussionSPCAdams, Bucks, Chester, Cumberland, Delaware, Franklin and 5 more5 hr
Mar 5, 11:55 AM ESTMesoscale DiscussionSPCChester, Delaware, Lancaster, Montgomery, Philadelphia, York6 hr
Mar 26, 6:12 PM EDTMesoscale DiscussionSPCChester, Lancaster, York2 hr
Apr 9, 7:26 PM EDTMesoscale DiscussionSPCBedford, Blair, Centre, Clearfield, Fulton, Huntingdon and 1 more64 min
Apr 20, 1:54 PM EDTMesoscale DiscussionSPCAdams, Bedford, Cumberland, Franklin, Fulton, Lancaster and 1 more3 hr
Apr 20, 3:23 PM EDTMesoscale DiscussionSPCBradford, Cameron, Centre, Clearfield, Clinton, Elk and 8 more2 hr
Apr 20, 5:01 PM EDTMesoscale DiscussionSPCAdams, Bedford, Berks, Blair, Chester, Cumberland and 10 more119 min
Apr 20, 5:57 PM EDTMesoscale DiscussionSPCBradford, Cameron, Centre, Clinton, Columbia, Luzerne and 9 more2 hr
Apr 20, 7:31 PM EDTMesoscale DiscussionSPCLackawanna, Susquehanna, Wayne2 hr
Apr 20, 9:17 PM EDTMesoscale DiscussionSPCAdams, Berks, Chester, Columbia, Cumberland, Dauphin and 12 more88 min
Apr 20, 10:34 PM EDTMesoscale DiscussionSPCLackawanna, Monroe, Pike, Wayne86 min
Apr 22, 12:32 PM EDTMesoscale DiscussionSPCAdams, Berks, Bucks, Carbon, Chester, Delaware and 9 more118 min
May 6, 3:21 PM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Bedford, Blair, Butler and 8 more114 min
May 11, 1:32 PM EDTMesoscale DiscussionSPCBradford, Potter, Susquehanna, Tioga2 hr
May 11, 4:24 PM EDTMesoscale DiscussionSPCBeaver, Lawrence, Mercer2 hr
May 11, 7:26 PM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Butler, Cambria, Clarion and 16 more64 min
May 11, 10:10 PM EDTMesoscale DiscussionSPCMcKean95 min
May 16, 1:35 PM EDTMesoscale DiscussionSPCAdams, Armstrong, Bedford, Berks, Blair, Bradford and 47 more2 hr
May 19, 7:38 PM EDTMesoscale DiscussionSPCPike2 hr
May 27, 12:21 PM EDTMesoscale DiscussionSPCAdams, Berks, Bucks, Carbon, Chester, Columbia and 21 more54 min
May 27, 2:59 PM EDTMesoscale DiscussionSPCAdams, Berks, Bucks, Carbon, Chester, Columbia and 19 more2 hr
May 27, 4:49 PM EDTMesoscale DiscussionSPCBucks, Chester, Delaware, Lehigh, Monroe, Montgomery and 3 more86 min
May 30, 7:23 PM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Butler, Cameron, Clarion and 13 more67 min
May 31, 12:51 PM EDTMesoscale DiscussionSPCAdams, Allegheny, Armstrong, Beaver, Bedford, Blair and 27 more114 min
Jun 8, 1:31 PM EDTMesoscale DiscussionSPCAdams, Bedford, Berks, Blair, Cambria, Cameron and 31 more119 min
Jun 8, 2:58 PM EDTMesoscale DiscussionSPCBradford, Columbia, Lackawanna, Luzerne, Lycoming, Monroe and 6 more92 min
Jun 8, 3:20 PM EDTMesoscale DiscussionSPCAdams, Berks, Bucks, Carbon, Centre, Chester and 25 more85 min
Jun 8, 4:46 PM EDTMesoscale DiscussionSPCAdams, Berks, Chester, Cumberland, Dauphin, Franklin and 6 more59 min
Jun 8, 7:12 PM EDTMesoscale DiscussionSPCLackawanna, Luzerne, Pike, Wayne93 min
Jun 8, 8:23 PM EDTMesoscale DiscussionSPCBucks, Chester, Delaware, Montgomery, Philadelphia67 min
Jun 9, 12:36 PM EDTMesoscale DiscussionSPCPike114 min
Jun 11, 2:47 PM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Berks, Blair, Butler and 32 more118 min
Jun 12, 12:52 PM EDTMesoscale DiscussionSPCBeaver, Crawford, Lawrence, Mercer113 min
Jun 12, 2:03 PM EDTMesoscale DiscussionSPCAdams, Carbon, Columbia, Cumberland, Dauphin, Franklin and 14 more87 min
Jun 12, 4:21 PM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Butler, Clarion, Clearfield and 7 more84 min
Jun 12, 6:53 PM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Cambria, Cameron, Centre, Clarion and 13 more97 min
Jun 12, 9:41 PM EDTMesoscale DiscussionSPCAdams, Carbon, Columbia, Cumberland, Dauphin, Franklin and 14 more94 min
Jun 14, 2:06 PM EDTMesoscale DiscussionSPCAdams, Allegheny, Armstrong, Beaver, Bedford, Blair and 19 more84 min
Jun 14, 4:14 PM EDTMesoscale DiscussionSPCCrawford, Erie2 hr
Jun 14, 7:08 PM EDTMesoscale DiscussionSPCBerks, Bucks, Carbon, Chester, Delaware, Lehigh and 4 more52 min
Jun 14, 7:59 PM EDTMesoscale DiscussionSPCCrawford, Erie, Lawrence, Mercer, Venango61 min
Jun 14, 8:49 PM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Butler, Cambria, Fayette and 5 more56 min
Jun 16, 12:15 PM EDTMesoscale DiscussionSPCAdams, Chester, Delaware, Franklin, Lancaster, York2 hr
Jun 20, 1:36 PM EDTMesoscale DiscussionSPCAdams, Bedford, Cumberland, Fayette, Franklin, Fulton and 3 more114 min
Jun 20, 6:24 PM EDTMesoscale DiscussionSPCAdams, Bedford, Berks, Blair, Bucks, Cambria and 20 more96 min
Jun 20, 8:37 PM EDTMesoscale DiscussionSPCBucks, Chester, Delaware, Montgomery, Philadelphia53 min
Jun 22, 6:38 PM EDTMesoscale DiscussionSPCCrawford, Erie, Mercer67 min
Jun 23, 4:24 AM EDTMesoscale DiscussionSPCMcKean, Potter, Warren66 min
Jun 23, 5:30 AM EDTMesoscale DiscussionSPCCameron, Clarion, Crawford, Elk, Erie, Forest and 8 more60 min
Jun 23, 8:39 AM EDTMesoscale DiscussionSPCCameron, Centre, Clearfield, Clinton, Columbia, Elk and 12 more96 min
Jun 23, 10:28 AM EDTMesoscale DiscussionSPCAllegheny, Beaver, Fayette, Greene, Somerset, Washington and 1 more2 hr
Jun 23, 3:25 PM EDTMesoscale DiscussionSPCAdams, Bedford, Berks, Blair, Bucks, Cambria and 21 more95 min
Jun 23, 5:47 PM EDTMesoscale DiscussionSPCAdams, Berks, Bucks, Carbon, Chester, Cumberland and 14 more88 min
Jun 23, 7:41 PM EDTMesoscale DiscussionSPCAdams, Berks, Bucks, Carbon, Chester, Cumberland and 14 more94 min
Jun 30, 12:03 PM EDTMesoscale DiscussionSPCAllegheny, Beaver, Greene, Lawrence, Washington2 hr
Jun 30, 12:31 PM EDTMesoscale DiscussionSPCAdams, Berks, Bradford, Bucks, Carbon, Chester and 28 more2 hr
Jun 30, 2:57 PM EDTMesoscale DiscussionSPCBucks, Montgomery, Northampton63 min
Jun 30, 3:48 PM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Bedford, Blair, Butler and 21 more117 min
Jun 30, 4:15 PM EDTMesoscale DiscussionSPCBerks, Bucks, Carbon, Chester, Columbia, Dauphin and 14 more2 hr
Jun 30, 7:38 PM EDTMesoscale DiscussionSPCAdams, Allegheny, Armstrong, Bedford, Berks, Blair and 55 more67 min
Jul 7, 4:31 PM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Butler, Cameron, Clarion and 17 more2 hr
Jul 9, 11:27 AM EDTMesoscale DiscussionSPCAllegheny, Beaver, Fayette, Greene, Washington, Westmoreland2 hr
Jul 9, 12:59 PM EDTMesoscale DiscussionSPCAdams, Bedford, Berks, Blair, Cambria, Carbon and 33 more2 hr
Jul 9, 3:09 PM EDTMesoscale DiscussionSPCAdams, Bedford, Berks, Blair, Bucks, Cambria and 41 more96 min
Jul 9, 4:55 PM EDTMesoscale DiscussionSPCAdams, Bedford, Berks, Blair, Cambria, Carbon and 24 more95 min
Jul 9, 6:25 PM EDTMesoscale DiscussionSPCBerks, Bucks, Chester, Delaware, Lehigh, Montgomery and 2 more95 min
Jul 14, 11:44 AM EDTMesoscale DiscussionSPCBeaver, Lawrence, Mercer61 min
Jul 14, 3:12 PM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Butler, Clarion, Fayette and 6 more93 min
Jul 14, 3:58 PM EDTMesoscale DiscussionSPCBedford, Blair, Cambria, Cameron, Centre, Clearfield and 10 more62 min
Jul 14, 4:37 PM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Butler, Clarion, Fayette and 6 more83 min
Jul 19, 2:11 PM EDTMesoscale DiscussionSPCArmstrong, Beaver, Butler, Cameron, Clarion, Crawford and 10 more2 hr
Jul 19, 8:32 PM EDTMesoscale DiscussionSPCArmstrong, Beaver, Bradford, Butler, Cameron, Clarion and 19 more88 min
Jul 21, 12:53 PM EDTMesoscale DiscussionSPCBedford, Blair, Bradford, Cambria, Centre, Clinton and 18 more67 min
Jul 21, 7:00 PM EDTMesoscale DiscussionSPCPhiladelphia90 min
Jul 26, 3:34 PM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Bradford, Butler, Cambria and 27 more116 min
Aug 4, 3:29 AM EDTMesoscale DiscussionSPCAdams, Berks, Bucks, Chester, Delaware, Lancaster and 4 more3 hr
Aug 11, 1:30 PM EDTMesoscale DiscussionSPCChester, Lancaster3 hr
Aug 20, 11:49 AM EDTMesoscale DiscussionSPCAdams, Armstrong, Bedford, Berks, Blair, Bradford and 39 more2 hr
Aug 20, 3:45 PM EDTMesoscale DiscussionSPCAdams, Berks, Bradford, Clinton, Columbia, Cumberland and 19 more3 hr
Sep 19, 4:10 PM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Butler, Clarion, Crawford and 10 more3 hr
Oct 9, 3:11 PM EDTMesoscale DiscussionSPCAdams, Berks, Bucks, Carbon, Chester, Cumberland and 13 more2 hr
Oct 9, 4:54 PM EDTMesoscale DiscussionSPCBucks, Chester, Delaware, Lancaster, Montgomery, Northampton and 1 more96 min
Oct 28, 9:14 PM EDTMesoscale DiscussionSPCBerks, Bucks, Carbon, Chester, Delaware, Lancaster and 8 more2 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. June 23, 20157mesoscale discussions
  2. June 30, 20156mesoscale discussions
  3. April 20, 20155mesoscale discussions
  4. June 8, 20155mesoscale discussions
  5. July 9, 20155mesoscale discussions
  6. June 12, 20154mesoscale discussions
  7. June 14, 20154mesoscale discussions
  8. July 14, 20154mesoscale discussions
  9. March 5, 20153mesoscale discussions
  10. May 11, 20153mesoscale discussions
  11. May 27, 20153mesoscale discussions
  12. February 2, 20152mesoscale discussions

Nearby

Alerts in force nowTornadoes on recordThe radar archive20142016

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.