Alert archive / Pennsylvania / Winter Storm Warnings / 2009
Winter Storm Warnings in Pennsylvania, December 2009
6 winter storm warnings in December 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 winter storm warnings reaches back to 2005.
Winter Storm Warnings by county
Each county as a circle sized by its count in December 2009. Tap one for its archive.
- Winter Storm Warnings
- 6
- Busiest day
- December 18, 20093 winter storm warnings
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 |
|---|---|---|---|---|
| Dec 8, 11:13 AM EST | Winter Storm Warning | CTP | Cambria, McKean, Potter, Somerset | 21 hr |
| Dec 8, 2:35 PM EST | Winter Storm Warning | PBZ | 15 hr | |
| Dec 18, 3:06 AM EST | Winter Storm Warning | PBZ | Greene | 48 hr |
| Dec 18, 4:40 AM EST | Winter Storm Warning | PHI | Berks, Carbon, Delaware, Lehigh, Monroe, Northampton and 1 more | 46 hr |
| Dec 18, 2:38 PM EST | Winter Storm Warning | CTP | Adams, Bedford, Blair, Cambria, Centre, Columbia and 17 more | 32 hr |
| Dec 25, 7:14 AM EST | Winter Storm Warning | PBZ | Clarion, Forest, Jefferson, Mercer, Venango | 9 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Cambria County2
- Somerset County2
- McKean County1
- Potter County1
- Greene County1
- Berks County1
- Carbon County1
- Delaware County1
- Lehigh County1
- Monroe County1
- Northampton County1
- Philadelphia County1
- Adams County1
- Bedford County1
- Blair County1
- Centre County1
- Columbia County1
- Cumberland County1
- Dauphin County1
- Franklin County1
- Fulton County1
- Huntingdon County1
- Juniata County1
- Lancaster County1
- Lebanon County1
- Mifflin County1
- Montour County1
- Northumberland County1
- Perry County1
- Schuylkill County1
- Snyder County1
- Union County1
- York County1
- Clarion County1
- Forest County1
- Jefferson County1
- Mercer County1
- Venango 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.