Alert archive / Pennsylvania / Mesoscale Discussions

Mesoscale Discussions in Pennsylvania, 2018

88 mesoscale discussions in 2018. 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 2018. Tap one for its archive.

Mesoscale Discussions
88
Busiest month
May24 mesoscale discussions
Busiest day
May 4, 20184 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 12, 2:58 PM ESTMesoscale DiscussionSPCCrawford, Erie, Mercer4 hr
Jan 12, 7:04 PM ESTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Bedford, Blair, Bradford and 33 more6 hr
Jan 13, 12:56 AM ESTMesoscale DiscussionSPCBerks, Bradford, Carbon, Columbia, Cumberland, Dauphin and 20 more6 hr
Jan 13, 3:47 AM ESTMesoscale DiscussionSPCMcKean, Potter, Tioga6 hr
Feb 4, 6:32 PM ESTMesoscale DiscussionSPCAdams, Berks, Carbon, Columbia, Cumberland, Dauphin and 16 more4 hr
Feb 7, 5:28 AM ESTMesoscale DiscussionSPCAdams, Allegheny, Armstrong, Beaver, Bedford, Berks and 49 more5 hr
Feb 7, 11:25 AM ESTMesoscale DiscussionSPCBlair, Bradford, Cameron, Carbon, Centre, Clearfield and 20 more6 hr
Feb 17, 1:51 PM ESTMesoscale DiscussionSPCAdams, Cumberland, Dauphin, Franklin, Fulton, Juniata and 1 more4 hr
Feb 17, 6:32 PM ESTMesoscale DiscussionSPCBerks, Bucks, Chester, Delaware, Lehigh, Montgomery and 2 more4 hr
Mar 1, 8:43 PM ESTMesoscale DiscussionSPCCrawford, Erie, Forest, McKean, Potter, Venango and 1 more6 hr
Mar 2, 3:15 AM ESTMesoscale DiscussionSPCLackawanna, Luzerne, Monroe, Pike, Susquehanna, Wayne and 1 more6 hr
Mar 7, 8:47 AM ESTMesoscale DiscussionSPCBucks, Montgomery, Northampton4 hr
Mar 7, 1:25 PM ESTMesoscale DiscussionSPCBucks, Chester, Delaware, Montgomery, Northampton, Philadelphia6 hr
Mar 20, 12:19 PM EDTMesoscale DiscussionSPCAdams, Bedford, Berks, Bucks, Chester, Cumberland and 8 more4 hr
Apr 2, 3:47 AM EDTMesoscale DiscussionSPCAdams, Berks, Bucks, Carbon, Chester, Columbia and 20 more6 hr
Apr 3, 6:38 PM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Bedford, Blair, Butler and 13 more2 hr
Apr 28, 3:11 PM EDTMesoscale DiscussionSPCBerks, Bucks, Carbon, Chester, Lancaster, Lebanon and 7 more2 hr
May 3, 6:03 PM EDTMesoscale DiscussionSPCBerks, Bucks, Chester, Dauphin, Delaware, Lancaster and 8 more2 hr
May 4, 1:04 PM EDTMesoscale DiscussionSPCCrawford, Erie, Forest, Lawrence, McKean, Mercer and 2 more86 min
May 4, 2:23 PM EDTMesoscale DiscussionSPCArmstrong, Butler, Cameron, Centre, Clarion, Clearfield and 11 more97 min
May 4, 4:20 PM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Bradford, Butler, Cambria and 22 more55 min
May 4, 5:52 PM EDTMesoscale DiscussionSPCCarbon, Lackawanna, Luzerne, Monroe, Pike, Susquehanna and 2 more83 min
May 4, 8:23 PM EDTMesoscale DiscussionSPCBlair, Cambria, Centre, Columbia, Fayette, Greene and 8 more67 min
May 4, 8:50 PM EDTMesoscale DiscussionSPCCarbon, Columbia, Lackawanna, Luzerne, Monroe, Montour and 8 more85 min
May 10, 4:23 PM EDTMesoscale DiscussionSPCBerks, Carbon, Columbia, Cumberland, Dauphin, Lackawanna and 13 more97 min
May 12, 1:51 PM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Bedford, Cambria, Fayette and 5 more2 hr
May 12, 3:59 PM EDTMesoscale DiscussionSPCBerks, Bucks, Chester, Dauphin, Delaware, Lancaster and 4 more3 hr
May 12, 5:05 PM EDTMesoscale DiscussionSPCAdams, Allegheny, Armstrong, Beaver, Bedford, Blair and 15 more115 min
May 12, 7:16 PM EDTMesoscale DiscussionSPCBerks, Bucks, Chester, Dauphin, Delaware, Lancaster and 4 more59 min
May 13, 1:56 PM EDTMesoscale DiscussionSPCFayette, Greene2 hr
May 13, 7:00 PM EDTMesoscale DiscussionSPCFayette, Greene, Washington60 min
May 14, 11:56 AM EDTMesoscale DiscussionSPCAdams, Allegheny, Armstrong, Beaver, Bedford, Blair and 13 more64 min
May 14, 3:26 PM EDTMesoscale DiscussionSPCAdams, Bedford, Blair, Cambria, Cumberland, Fayette and 11 more2 hr
May 15, 11:43 AM EDTMesoscale DiscussionSPCArmstrong, Blair, Bradford, Cambria, Cameron, Carbon and 29 more3 hr
May 15, 2:14 PM EDTMesoscale DiscussionSPCBedford, Blair, Bradford, Carbon, Centre, Columbia and 21 more2 hr
May 15, 2:38 PM EDTMesoscale DiscussionSPCSusquehanna, Wayne2 hr
May 15, 3:33 PM EDTMesoscale DiscussionSPCAdams, Berks, Bucks, Carbon, Chester, Cumberland and 13 more117 min
May 22, 12:57 PM EDTMesoscale DiscussionSPCCrawford, Lawrence, Mercer3 hr
May 22, 3:48 PM EDTMesoscale DiscussionSPCAllegheny, Beaver, Butler, Crawford, Lawrence, Mercer and 1 more117 min
May 22, 6:36 PM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Butler, Clarion, Greene and 3 more114 min
May 28, 2:16 PM EDTMesoscale DiscussionSPCBradford, Cameron, Centre, Clearfield, Clinton, Elk and 6 more2 hr
Jun 5, 3:05 PM EDTMesoscale DiscussionSPCAdams, Allegheny, Armstrong, Beaver, Bedford, Berks and 35 more2 hr
Jun 13, 3:30 PM EDTMesoscale DiscussionSPCElk, Forest, McKean, Potter, Tioga, Warren60 min
Jun 13, 6:10 PM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Bedford, Blair, Butler and 31 more95 min
Jun 13, 7:12 PM EDTMesoscale DiscussionSPCBradford, Lackawanna, McKean, Potter, Sullivan, Susquehanna and 4 more93 min
Jun 13, 8:43 PM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Bedford, Blair, Butler and 32 more62 min
Jun 13, 10:46 PM EDTMesoscale DiscussionSPCBucks, Carbon, Lehigh, Northampton59 min
Jun 18, 5:55 PM EDTMesoscale DiscussionSPCBerks, Bucks, Carbon, Lehigh, Monroe, Northampton and 2 more2 hr
Jun 20, 3:23 PM EDTMesoscale DiscussionSPCFayette, Greene, Somerset2 hr
Jun 24, 6:16 PM EDTMesoscale DiscussionSPCBerks, Bucks, Carbon, Chester, Delaware, Lancaster and 10 more119 min
Jun 27, 7:37 PM EDTMesoscale DiscussionSPCAdams, Bedford, Blair, Cambria, Cameron, Centre and 19 more3 hr
Jul 2, 1:03 PM EDTMesoscale DiscussionSPCAdams, Bedford, Blair, Bradford, Cambria, Cameron and 21 more72 min
Jul 17, 11:49 AM EDTMesoscale DiscussionSPCBucks, Delaware, Lehigh, Monroe, Montgomery, Northampton and 2 more116 min
Jul 23, 2:40 PM EDTMesoscale DiscussionSPCAdams, Berks, Bradford, Carbon, Chester, Columbia and 26 more3 hr
Jul 26, 4:30 PM EDTMesoscale DiscussionSPCCrawford, Erie, Forest, Mercer, Venango, Warren2 hr
Jul 27, 12:59 PM EDTMesoscale DiscussionSPCBerks, Bucks, Carbon, Chester, Dauphin, Delaware and 13 more91 min
Jul 27, 4:50 PM EDTMesoscale DiscussionSPCAdams, Berks, Bucks, Carbon, Chester, Columbia and 17 more55 min
Jul 27, 7:06 PM EDTMesoscale DiscussionSPCBerks, Bucks, Chester, Delaware, Lancaster, Lehigh and 4 more54 min
Aug 1, 3:15 PM EDTMesoscale DiscussionSPCAdams, Bedford, Berks, Bradford, Carbon, Columbia and 23 more3 hr
Aug 2, 11:46 AM EDTMesoscale DiscussionSPCBerks, Bucks, Chester, Delaware, Lancaster, Lehigh and 4 more119 min
Aug 6, 3:12 PM EDTMesoscale DiscussionSPCCrawford, Erie3 hr
Aug 7, 1:03 PM EDTMesoscale DiscussionSPCPike, Susquehanna, Wayne117 min
Aug 13, 1:57 PM EDTMesoscale DiscussionSPCAllegheny, Bedford, Fayette, Greene, Somerset, Westmoreland3 hr
Aug 17, 2:42 PM EDTMesoscale DiscussionSPCBradford, Carbon, Columbia, Dauphin, Juniata, Lackawanna and 15 more3 hr
Aug 17, 7:31 PM EDTMesoscale DiscussionSPCBucks, Delaware, Montgomery, Philadelphia89 min
Aug 21, 12:45 PM EDTMesoscale DiscussionSPCFayette, Greene, Washington, Westmoreland3 hr
Aug 21, 2:16 PM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Bedford, Blair, Cambria, Clarion and 7 more119 min
Aug 21, 4:56 PM EDTMesoscale DiscussionSPCAdams, Armstrong, Bedford, Blair, Cambria, Centre and 16 more2 hr
Aug 21, 7:06 PM EDTMesoscale DiscussionSPCAdams, Berks, Chester, Cumberland, Dauphin, Franklin and 5 more84 min
Aug 29, 2:55 PM EDTMesoscale DiscussionSPCBeaver, Crawford, Lawrence, Mercer, Venango3 hr
Sep 6, 1:20 PM EDTMesoscale DiscussionSPCBlair, Bradford, Cambria, Carbon, Centre, Clearfield and 21 more2 hr
Sep 21, 3:37 PM EDTMesoscale DiscussionSPCCrawford, Erie, Lawrence, Mercer, Venango83 min
Sep 21, 7:04 PM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Blair, Bradford, Butler and 21 more116 min
Sep 25, 5:38 PM EDTMesoscale DiscussionSPCPhiladelphia2 hr
Sep 26, 2:48 PM EDTMesoscale DiscussionSPCBradford, Carbon, Centre, Clinton, Columbia, Juniata and 18 more2 hr
Sep 26, 3:40 PM EDTMesoscale DiscussionSPCAdams, Bedford, Bucks, Chester, Cumberland, Dauphin and 9 more3 hr
Oct 2, 2:26 PM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Bedford, Berks, Blair and 41 more2 hr
Oct 2, 4:43 PM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Berks, Blair, Bradford and 47 more2 hr
Oct 2, 4:49 PM EDTMesoscale DiscussionSPCBeaver, Fayette, Greene, Washington116 min
Oct 2, 7:24 PM EDTMesoscale DiscussionSPCAllegheny, Armstrong, Beaver, Berks, Blair, Bradford and 41 more81 min
Nov 15, 3:18 AM ESTMesoscale DiscussionSPCAdams, Allegheny, Bedford, Fayette, Franklin, Fulton and 4 more6 hr
Nov 15, 9:56 AM ESTMesoscale DiscussionSPCAdams, Armstrong, Bedford, Berks, Blair, Bradford and 48 more6 hr
Nov 15, 4:39 PM ESTMesoscale DiscussionSPCBerks, Blair, Bradford, Bucks, Cameron, Carbon and 33 more6 hr
Nov 15, 10:06 PM ESTMesoscale DiscussionSPCBradford, Carbon, Columbia, Lackawanna, Luzerne, Lycoming and 8 more6 hr
Nov 16, 3:56 AM ESTMesoscale DiscussionSPCBerks, Bradford, Carbon, Columbia, Dauphin, Lackawanna and 17 more6 hr
Nov 24, 10:08 AM ESTMesoscale DiscussionSPCBlair, Bradford, Cambria, Cameron, Centre, Clearfield and 20 more5 hr
Dec 2, 4:28 PM ESTMesoscale DiscussionSPCCrawford, Erie, Mercer92 min
Dec 21, 4:16 PM ESTMesoscale DiscussionSPCAdams, Centre, Clinton, Cumberland, Franklin, Huntingdon and 7 more59 min

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 4, 20184mesoscale discussions
  2. May 12, 20184mesoscale discussions
  3. May 15, 20184mesoscale discussions
  4. August 21, 20184mesoscale discussions
  5. October 2, 20184mesoscale discussions
  6. January 13, 20183mesoscale discussions
  7. May 22, 20183mesoscale discussions
  8. June 13, 20183mesoscale discussions
  9. July 27, 20183mesoscale discussions
  10. November 15, 20183mesoscale discussions
  11. February 7, 20182mesoscale discussions
  12. February 17, 20182mesoscale discussions

Nearby

Alerts in force nowTornadoes on recordThe radar archive20172019

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.