Alert archive / Pennsylvania / Severe Thunderstorm Warnings / 2009
Severe Thunderstorm Warnings in Pennsylvania, December 2009
12 severe thunderstorm 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 severe thunderstorm warnings reaches back to 1986.
Severe Thunderstorm Warnings by county
Each county as a circle sized by its count in December 2009. Tap one for its archive.
- Severe Thunderstorm Warnings
- 12
- Busiest day
- December 9, 20099 severe thunderstorm 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 3, 3:31 AM EST | Severe Thunderstorm Warning | CTP | Cameron, Centre, Clinton, Huntingdon, Lycoming, Mifflin and 2 more | 29 min |
| Dec 3, 4:48 AM EST | Severe Thunderstorm Warning | CTP | Columbia, Lycoming, Montour, Northumberland, Schuylkill, Sullivan | 42 min |
| Dec 3, 5:41 AM EST | Severe Thunderstorm Warning | PHI | Bucks, Carbon, Lehigh, Monroe, Montgomery, Northampton | 49 min |
| Dec 9, 12:18 PM EST | Severe Thunderstorm Warning | PBZ | Venango | 27 min |
| Dec 9, 1:04 PM EST | Severe Thunderstorm Warning | CTP | Warren | 56 min |
| Dec 9, 1:05 PM EST | Severe Thunderstorm Warning | PBZ | Clarion, Forest, Jefferson | 25 min |
| Dec 9, 1:07 PM EST | Severe Thunderstorm Warning | PBZ | Armstrong, Indiana, Westmoreland | 53 min |
| Dec 9, 1:09 PM EST | Severe Thunderstorm Warning | PBZ | Forest, Venango | 21 min |
| Dec 9, 1:29 PM EST | Severe Thunderstorm Warning | PBZ | Fayette, Indiana, Westmoreland | 31 min |
| Dec 9, 1:31 PM EST | Severe Thunderstorm Warning | CTP | Elk, McKean, Warren | 59 min |
| Dec 9, 1:49 PM EST | Severe Thunderstorm Warning | CTP | Cambria, Clearfield, Somerset | 41 min |
| Dec 9, 3:05 PM EST | Severe Thunderstorm Warning | PBZ | Armstrong, Clarion, Jefferson | 40 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Lycoming County2
- Venango County2
- Warren County2
- Clarion County2
- Forest County2
- Jefferson County2
- Armstrong County2
- Indiana County2
- Westmoreland County2
- Cameron County1
- Centre County1
- Clinton County1
- Huntingdon County1
- Mifflin County1
- Snyder County1
- Union County1
- Columbia County1
- Montour County1
- Northumberland County1
- Schuylkill County1
- Sullivan County1
- Bucks County1
- Carbon County1
- Lehigh County1
- Monroe County1
- Montgomery County1
- Northampton County1
- Fayette County1
- Elk County1
- McKean County1
- Cambria County1
- Clearfield County1
- Somerset 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.