Alert archive / Pennsylvania / Mesoscale Discussions / 2021
Mesoscale Discussions in Pennsylvania, May 2021
7 mesoscale discussions in May 2021. 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 2021. Tap one for its archive.
- Mesoscale Discussions
- 7
- Busiest day
- May 26, 20213 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 |
|---|---|---|---|---|
| May 3, 2:47 PM EDT | Mesoscale Discussion | SPC | Fayette, Greene, Washington | 118 min |
| May 4, 3:28 PM EDT | Mesoscale Discussion | SPC | Bradford, Cameron, Clarion, Clearfield, Clinton, Columbia and 14 more | 62 min |
| May 5, 1:03 PM EDT | Mesoscale Discussion | SPC | Lancaster | 2 hr |
| May 23, 1:20 PM EDT | Mesoscale Discussion | SPC | Berks, Bradford, Cameron, Carbon, Centre, Clearfield and 27 more | 115 min |
| May 26, 12:16 PM EDT | Mesoscale Discussion | SPC | Allegheny, Armstrong, Beaver, Blair, Bradford, Butler and 39 more | 119 min |
| May 26, 4:41 PM EDT | Mesoscale Discussion | SPC | Berks, Bucks, Carbon, Chester, Delaware, Lackawanna and 12 more | 64 min |
| May 26, 6:34 PM EDT | Mesoscale Discussion | SPC | Bucks, Chester, Delaware, Montgomery, Philadelphia | 116 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Lackawanna County4
- Luzerne County4
- Bradford County3
- Cameron County3
- Clearfield County3
- Clinton County3
- Columbia County3
- Elk County3
- Forest County3
- Jefferson County3
- Lycoming County3
- McKean County3
- Montour County3
- Potter County3
- Sullivan County3
- Susquehanna County3
- Tioga County3
- Union County3
- Wyoming County3
- Wayne County3
- Fayette County2
- Greene County2
- Washington County2
- Clarion County2
- Lancaster County2
- Berks County2
- Carbon County2
- Centre County2
- Juniata County2
- Lehigh County2
- Mifflin County2
- Monroe County2
- Northampton County2
- Northumberland County2
- Pike County2
- Schuylkill County2
- Snyder County2
- Bucks County2
- Chester County2
- Delaware County2
21 more counties
- Montgomery County2
- Philadelphia County2
- Dauphin County1
- Allegheny County1
- Armstrong County1
- Beaver County1
- Blair County1
- Butler County1
- Cambria County1
- Crawford County1
- Erie County1
- Huntingdon County1
- Indiana County1
- Lawrence County1
- Mercer County1
- Somerset County1
- Venango County1
- Warren County1
- Westmoreland County1
- Lebanon County1
- York County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20202022
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. Rebuilt daily.