Mesoscale Discussions in Pennsylvania
3,114 mesoscale discussions since 1986. 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 since 1986. Tap one for its archive.
- Mesoscale Discussions
- 3,114
- Busiest year
- 2011184 mesoscale discussions
- Average year
- 130over 24 years on file
Over time
By year
Mesoscale discussions are counted from 2003.
By month of the year
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Chester County903
- Lancaster County890
- Montgomery County879
- York County877
- Berks County865
- Delaware County865
- Bucks County864
- Philadelphia County838
- Lehigh County835
- Northampton County819
- Lebanon County817
- Adams County804
- Monroe County800
- Carbon County793
- Dauphin County793
- Cumberland County790
- Schuylkill County782
- Pike County756
- Wayne County756
- Lackawanna County754
- Perry County750
- Susquehanna County747
- Luzerne County745
- Wyoming County736
- Columbia County732
- Northumberland County728
- Montour County727
- Franklin County720
- Sullivan County715
- Snyder County705
- Juniata County703
- Lycoming County690
- Union County690
- Beaver County687
- Lawrence County676
- Bradford County671
- Huntingdon County667
- Washington County666
- Mifflin County661
- Allegheny County660
27 more counties
- Butler County658
- Mercer County653
- Armstrong County651
- Fulton County651
- Clinton County641
- Centre County639
- Clarion County636
- Indiana County634
- Jefferson County634
- Westmoreland County632
- Blair County620
- Tioga County619
- Venango County616
- Clearfield County612
- Elk County612
- Forest County606
- Bedford County603
- Cambria County603
- Greene County603
- Cameron County597
- Potter County596
- Fayette County590
- Crawford County575
- McKean County571
- Somerset County560
- Warren County537
- Erie County341
The latest mesoscale discussions
The most recent on file, newest first.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 13, 3:59 PM EDT | Mesoscale Discussion | SPC | Beaver, Butler, Cameron, Clarion, Crawford, Elk and 9 more | 2 hr |
| Sep 12, 2:22 PM EDT | Mesoscale Discussion | SPC | Allegheny, Armstrong, Beaver, Butler, Clarion, Fayette and 5 more | 113 min |
| Sep 9, 4:42 PM EDT | Mesoscale Discussion | SPC | Armstrong, Beaver, Butler, Cameron, Clarion, Crawford and 9 more | 93 min |
| Sep 9, 2:06 PM EDT | Mesoscale Discussion | SPC | Armstrong, Beaver, Butler, Cameron, Clarion, Crawford and 9 more | 84 min |
| Sep 3, 8:19 PM EDT | Mesoscale Discussion | SPC | Bedford, Franklin, Fulton | 56 min |
| Sep 3, 6:19 PM EDT | Mesoscale Discussion | SPC | Adams, Bedford, Blair, Cambria, Cumberland, Fayette and 8 more | 116 min |
| Sep 3, 6:13 PM EDT | Mesoscale Discussion | SPC | Allegheny, Armstrong, Cambria, Fayette, Indiana, Somerset and 2 more | 92 min |
| Sep 3, 4:16 PM EDT | Mesoscale Discussion | SPC | Allegheny, Armstrong, Beaver, Bedford, Blair, Butler and 26 more | 119 min |
| Sep 3, 1:44 PM EDT | Mesoscale Discussion | SPC | Butler, Crawford, Erie, Lawrence, Mercer, Venango | 3 hr |
| Sep 3, 2:07 AM EDT | Mesoscale Discussion | SPC | Armstrong, Blair, Butler, Cambria, Cameron, Centre and 22 more | 113 min |
| Sep 2, 8:48 PM EDT | Mesoscale Discussion | SPC | Bradford, Cameron, Centre, Clarion, Clearfield, Clinton and 19 more | 87 min |
| Sep 2, 3:58 PM EDT | Mesoscale Discussion | SPC | Armstrong, Butler, Cameron, Centre, Clarion, Clearfield and 11 more | 92 min |
Nearby
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.