Alert archive / Pennsylvania / Mesoscale Discussions / 2009
Mesoscale Discussions in Pennsylvania, February 2009
5 mesoscale discussions in February 2009. 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 2009. Tap one for its archive.
- Mesoscale Discussions
- 5
- Busiest day
- February 12, 20092 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 11, 5:32 PM EST | Mesoscale Discussion | SPC | Allegheny, Armstrong, Beaver, Bedford, Blair, Cambria and 9 more | 88 min |
| Feb 11, 8:00 PM EST | Mesoscale Discussion | SPC | Adams, Allegheny, Armstrong, Beaver, Bedford, Blair and 44 more | 60 min |
| Feb 11, 10:14 PM EST | Mesoscale Discussion | SPC | Adams, Berks, Bucks, Chester, Cumberland, Dauphin and 6 more | 61 min |
| Feb 18, 12:38 PM EST | Mesoscale Discussion | SPC | Blair, Bradford, Cameron, Centre, Clearfield, Clinton and 17 more | 3 hr |
| Feb 18, 6:28 PM EST | Mesoscale Discussion | SPC | Wayne | 4 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Blair County3
- Huntingdon County3
- Allegheny County2
- Armstrong County2
- Beaver County2
- Bedford County2
- Cambria County2
- Fayette County2
- Franklin County2
- Fulton County2
- Indiana County2
- Somerset County2
- Washington County2
- Westmoreland County2
- Adams County2
- Bradford County2
- Cameron County2
- Centre County2
- Clearfield County2
- Clinton County2
- Columbia County2
- Cumberland County2
- Dauphin County2
- Elk County2
- Juniata County2
- Lancaster County2
- Lebanon County2
- Luzerne County2
- Lycoming County2
- McKean County2
- Mifflin County2
- Montour County2
- Potter County2
- Snyder County2
- Sullivan County2
- Tioga County2
- Union County2
- York County2
- Greene County1
- Butler County1
21 more counties
- Clarion County1
- Crawford County1
- Forest County1
- Jefferson County1
- Lawrence County1
- Mercer County1
- Northumberland County1
- Perry County1
- Schuylkill County1
- Venango County1
- Warren County1
- Berks County1
- Bucks County1
- Chester County1
- Delaware County1
- Montgomery County1
- Philadelphia County1
- Lackawanna County1
- Susquehanna County1
- Wyoming County1
- Wayne County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20082010
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.