Alert archive / Pennsylvania / Mesoscale Discussions / 2026
Mesoscale Discussions in Pennsylvania, August 2026
31 mesoscale discussions in August 2026. 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 August 2026. Tap one for its archive.
- Mesoscale Discussions
- 31
- Busiest day
- August 27, 20266 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.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 3, 12:29 AM EDT | Mesoscale Discussion | SPC | Pike | 2 hr |
| Aug 6, 1:39 PM EDT | Mesoscale Discussion | SPC | Adams, Bedford, Berks, Blair, Bradford, Bucks and 35 more | 2 hr |
| Aug 7, 12:50 PM EDT | Mesoscale Discussion | SPC | Adams, Berks, Bucks, Carbon, Chester, Delaware and 10 more | 2 hr |
| Aug 7, 4:04 PM EDT | Mesoscale Discussion | SPC | Bucks, Delaware, Montgomery, Northampton, Philadelphia | 116 min |
| Aug 8, 11:55 AM EDT | Mesoscale Discussion | SPC | Adams, Chester, Delaware, Lancaster, Philadelphia, York | 95 min |
| Aug 8, 1:11 PM EDT | Mesoscale Discussion | SPC | Lackawanna, Susquehanna, Wayne, Wyoming | 94 min |
| Aug 8, 5:54 PM EDT | Mesoscale Discussion | SPC | Allegheny, Armstrong, Beaver, Butler, Clarion, Crawford and 10 more | 2 hr |
| Aug 10, 8:41 AM EDT | Mesoscale Discussion | SPC | Armstrong, Butler, Clarion, Crawford, Elk, Forest and 5 more | 2 hr |
| Aug 10, 9:29 AM EDT | Mesoscale Discussion | SPC | Berks, Bucks, Chester, Dauphin, Delaware, Lancaster and 4 more | 91 min |
| Aug 10, 11:44 AM EDT | Mesoscale Discussion | SPC | Bradford, Cameron, Elk, McKean, Potter, Tioga | 2 hr |
| Aug 10, 1:38 PM EDT | Mesoscale Discussion | SPC | Adams, Bedford, Berks, Blair, Bradford, Bucks and 37 more | 2 hr |
| Aug 10, 4:19 PM EDT | Mesoscale Discussion | SPC | Bucks, Delaware, Philadelphia | 116 min |
| Aug 11, 2:40 PM EDT | Mesoscale Discussion | SPC | Berks, Bradford, Bucks, Carbon, Chester, Columbia and 17 more | 2 hr |
| Aug 12, 1:10 PM EDT | Mesoscale Discussion | SPC | Bradford, McKean, Potter, Sullivan, Susquehanna, Tioga and 2 more | 2 hr |
| Aug 16, 11:56 AM EDT | Mesoscale Discussion | SPC | Allegheny, Beaver, Butler, Greene, Lawrence, Washington | 64 min |
| Aug 16, 2:28 PM EDT | Mesoscale Discussion | SPC | Allegheny, Armstrong, Beaver, Butler, Clarion, Fayette and 6 more | 2 hr |
| Aug 16, 3:28 PM EDT | Mesoscale Discussion | SPC | Bedford, Fulton, Somerset | 2 hr |
| Aug 16, 7:00 PM EDT | Mesoscale Discussion | SPC | Adams, Cumberland, York | 60 min |
| Aug 20, 1:53 PM EDT | Mesoscale Discussion | SPC | Bucks, Chester, Delaware, Lancaster, Montgomery, Philadelphia and 1 more | 2 hr |
| Aug 20, 4:26 PM EDT | Mesoscale Discussion | SPC | Bucks, Chester, Delaware, Montgomery, Philadelphia | 2 hr |
| Aug 22, 11:38 AM EDT | Mesoscale Discussion | SPC | Allegheny, Armstrong, Beaver, Butler, Cambria, Clarion and 16 more | 3 hr |
| Aug 22, 3:50 PM EDT | Mesoscale Discussion | SPC | Allegheny, Armstrong, Beaver, Butler, Clarion, Crawford and 10 more | 115 min |
| Aug 22, 7:00 PM EDT | Mesoscale Discussion | SPC | Bedford, Blair, Cambria, Cameron, Centre, Clearfield and 11 more | 90 min |
| Aug 23, 12:03 PM EDT | Mesoscale Discussion | SPC | Bradford, Lackawanna, Luzerne, Lycoming, Pike, Potter and 5 more | 2 hr |
| Aug 23, 8:02 PM EDT | Mesoscale Discussion | SPC | Crawford | 88 min |
| Aug 27, 10:57 AM EDT | Mesoscale Discussion | SPC | Bucks, Delaware, Montgomery, Northampton, Philadelphia | 2 hr |
| Aug 27, 12:51 PM EDT | Mesoscale Discussion | SPC | Bradford, Lackawanna, Luzerne, Sullivan, Susquehanna, Wayne and 1 more | 114 min |
| Aug 27, 1:52 PM EDT | Mesoscale Discussion | SPC | Adams, Cumberland, Dauphin, Franklin, Fulton, Juniata and 2 more | 113 min |
| Aug 27, 2:29 PM EDT | Mesoscale Discussion | SPC | Delaware, Philadelphia | 2 hr |
| Aug 27, 7:06 PM EDT | Mesoscale Discussion | SPC | Lackawanna, Wayne | 84 min |
| Aug 27, 7:26 PM EDT | Mesoscale Discussion | SPC | Adams, Berks, Columbia, Cumberland, Dauphin, Lancaster and 8 more | 94 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Delaware County12
- Philadelphia County11
- Bucks County10
- Montgomery County9
- York County9
- Chester County8
- Wayne County8
- Adams County7
- Bradford County7
- Lackawanna County7
- Lancaster County7
- Wyoming County7
- Pike County6
- Berks County6
- Northampton County6
- Sullivan County6
- Susquehanna County6
- Butler County6
- Lawrence County6
- Cumberland County5
- Dauphin County5
- Fulton County5
- Lebanon County5
- Luzerne County5
- Schuylkill County5
- Tioga County5
- Allegheny County5
- Armstrong County5
- Beaver County5
- Clarion County5
- Crawford County5
- Elk County5
- McKean County5
- Mercer County5
- Venango County5
- Bedford County4
- Carbon County4
- Columbia County4
- Lehigh County4
- Lycoming County4
27 more counties
- Monroe County4
- Montour County4
- Northumberland County4
- Perry County4
- Union County4
- Forest County4
- Jefferson County4
- Warren County4
- Potter County4
- Somerset County4
- Greene County4
- Washington County4
- Westmoreland County4
- Blair County3
- Centre County3
- Clinton County3
- Franklin County3
- Huntingdon County3
- Juniata County3
- Mifflin County3
- Snyder County3
- Erie County3
- Indiana County3
- Fayette County3
- Cameron County2
- Cambria County2
- Clearfield County1
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.