Alert archive / Pennsylvania / Mesoscale Discussions / 2011
Mesoscale Discussions in Pennsylvania, September 2011
11 mesoscale discussions in September 2011. 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 September 2011. Tap one for its archive.
- Mesoscale Discussions
- 11
- Busiest day
- September 4, 20112 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 |
|---|---|---|---|---|
| Sep 4, 1:33 PM EDT | Mesoscale Discussion | SPC | Bedford, Blair, Bradford, Cambria, Cameron, Centre and 28 more | 87 min |
| Sep 4, 6:06 PM EDT | Mesoscale Discussion | SPC | Bradford, Clinton, Columbia, Lackawanna, Luzerne, Lycoming and 9 more | 54 min |
| Sep 4, 8:35 PM EDT | Mesoscale Discussion | SPC | Bradford, Clinton, Columbia, Lackawanna, Luzerne, Lycoming and 10 more | 55 min |
| Sep 7, 3:36 PM EDT | Mesoscale Discussion | SPC | Berks, Bucks, Chester, Delaware, Montgomery, Philadelphia | 84 min |
| Sep 11, 6:38 PM EDT | Mesoscale Discussion | SPC | Adams, Bedford, Chester, Cumberland, Dauphin, Delaware and 8 more | 97 min |
| Sep 13, 7:00 PM EDT | Mesoscale Discussion | SPC | Crawford, Erie, Forest, McKean, Mercer, Venango and 1 more | 60 min |
| Sep 14, 3:22 PM EDT | Mesoscale Discussion | SPC | Adams, Bedford, Berks, Carbon, Chester, Cumberland and 11 more | 53 min |
| Sep 25, 6:34 PM EDT | Mesoscale Discussion | SPC | Allegheny, Beaver, Butler, Crawford, Greene, Lawrence and 2 more | 86 min |
| Sep 26, 2:16 PM EDT | Mesoscale Discussion | SPC | Beaver, Crawford, Greene, Lawrence, Mercer, Washington | 59 min |
| Sep 28, 4:45 PM EDT | Mesoscale Discussion | SPC | Berks, Bucks, Carbon, Chester, Columbia, Dauphin and 13 more | 60 min |
| Sep 29, 11:22 AM EDT | Mesoscale Discussion | SPC | Carbon, Monroe, Northampton, Pike | 83 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Columbia County4
- Dauphin County4
- Luzerne County4
- Montour County4
- Northumberland County4
- Chester County4
- Bedford County3
- Bradford County3
- Clinton County3
- Cumberland County3
- Franklin County3
- Fulton County3
- Lackawanna County3
- Lycoming County3
- Perry County3
- Schuylkill County3
- Sullivan County3
- Susquehanna County3
- Tioga County3
- Union County3
- Wayne County3
- Wyoming County3
- Pike County3
- Berks County3
- Delaware County3
- Montgomery County3
- Philadelphia County3
- Lancaster County3
- Lebanon County3
- York County3
- Crawford County3
- Mercer County3
- Carbon County3
- Juniata County2
- Snyder County2
- Somerset County2
- Bucks County2
- Adams County2
- Lehigh County2
- Beaver County2
22 more counties
- Greene County2
- Lawrence County2
- Washington County2
- Monroe County2
- Northampton County2
- Blair County1
- Cambria County1
- Cameron County1
- Centre County1
- Clearfield County1
- Huntingdon County1
- Indiana County1
- Mifflin County1
- Potter County1
- Westmoreland County1
- Erie County1
- Forest County1
- McKean County1
- Venango County1
- Warren County1
- Allegheny County1
- Butler County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20102012
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.