Alert archive / Pennsylvania / Mesoscale Discussions / 2018

Mesoscale Discussions in Pennsylvania, May 2018

24 mesoscale discussions in May 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 May 2018. Tap one for its archive.

Mesoscale Discussions
24
Busiest day
May 4, 20184 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 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

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 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.