Alert archive / Pennsylvania / Mesoscale Discussions / 2011
Mesoscale Discussions in Pennsylvania, February 2011
10 mesoscale discussions in February 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 February 2011. Tap one for its archive.
- Mesoscale Discussions
- 10
- Busiest day
- February 21, 20114 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 |
|---|---|---|---|---|
| Feb 1, 12:12 AM EST | Mesoscale Discussion | SPC | Allegheny, Armstrong, Beaver, Butler, Clarion, Crawford and 10 more | 5 hr |
| Feb 1, 2:42 AM EST | Mesoscale Discussion | SPC | Berks, Blair, Bradford, Cameron, Carbon, Centre and 30 more | 4 hr |
| Feb 1, 8:39 PM EST | Mesoscale Discussion | SPC | Adams, Armstrong, Bedford, Berks, Blair, Bucks and 44 more | 6 hr |
| Feb 20, 7:46 PM EST | Mesoscale Discussion | SPC | Armstrong, Blair, Bradford, Butler, Cameron, Centre and 24 more | 4 hr |
| Feb 20, 11:50 PM EST | Mesoscale Discussion | SPC | Bradford, Butler, Cambria, Cameron, Carbon, Centre and 29 more | 5 hr |
| Feb 21, 5:58 PM EST | Mesoscale Discussion | SPC | Adams, Allegheny, Armstrong, Bedford, Blair, Cambria and 12 more | 4 hr |
| Feb 21, 6:33 PM EST | Mesoscale Discussion | SPC | Fayette, Greene | 5 hr |
| Feb 25, 2:46 AM EST | Mesoscale Discussion | SPC | Bradford, Cameron, Crawford, Elk, Erie, Forest and 6 more | 4 hr |
| Feb 25, 11:36 AM EST | Mesoscale Discussion | SPC | Chester, Delaware, Philadelphia | 84 min |
| Feb 28, 5:31 AM EST | Mesoscale Discussion | SPC | Allegheny, Beaver, Fayette, Greene, Lawrence, Washington | 29 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Crawford County5
- Forest County5
- Indiana County5
- Mercer County5
- Venango County5
- Cameron County5
- Elk County5
- McKean County5
- Armstrong County4
- Butler County4
- Clarion County4
- Erie County4
- Blair County4
- Bradford County4
- Centre County4
- Clearfield County4
- Clinton County4
- Huntingdon County4
- Juniata County4
- Lycoming County4
- Mifflin County4
- Montour County4
- Northumberland County4
- Potter County4
- Tioga County4
- Union County4
- Warren County4
- Allegheny County3
- Fayette County3
- Lawrence County3
- Somerset County3
- Carbon County3
- Columbia County3
- Cumberland County3
- Luzerne County3
- Monroe County3
- Perry County3
- Snyder County3
- Sullivan County3
- Cambria County3
27 more counties
- Jefferson County3
- Beaver County2
- Washington County2
- Westmoreland County2
- Berks County2
- Dauphin County2
- Lackawanna County2
- Lebanon County2
- Lehigh County2
- Northampton County2
- Pike County2
- Schuylkill County2
- Susquehanna County2
- Wayne County2
- Wyoming County2
- Adams County2
- Bedford County2
- Chester County2
- Delaware County2
- Franklin County2
- Fulton County2
- Lancaster County2
- Philadelphia County2
- York County2
- Greene County2
- Bucks County1
- Montgomery 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.