Alert archive / Pennsylvania / Severe Thunderstorm Warnings / 2009
Severe Thunderstorm Warnings in Pennsylvania, May 2009
50 severe thunderstorm warnings in May 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 May 2009. Tap one for its archive.
- Severe Thunderstorm Warnings
- 50
- Busiest day
- May 16, 200912 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 |
|---|---|---|---|---|
| May 1, 4:33 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 57 min |
| May 11, 5:39 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Westmoreland | 38 min |
| May 16, 1:33 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming, Potter, Tioga | 57 min |
| May 16, 2:16 PM EDT | Severe Thunderstorm Warning | CTP | Cameron, Elk, McKean | 59 min |
| May 16, 4:18 PM EDT | Severe Thunderstorm Warning | BGM | Bradford | 42 min |
| May 16, 4:25 PM EDT | Severe Thunderstorm Warning | CTP | Tioga | 65 min |
| May 16, 4:32 PM EDT | Severe Thunderstorm Warning | BGM | Bradford | 58 min |
| May 16, 4:37 PM EDT | Severe Thunderstorm Warning | BGM | Bradford | 53 min |
| May 16, 5:27 PM EDT | Severe Thunderstorm Warning | BGM | Bradford | 48 min |
| May 16, 6:38 PM EDT | Severe Thunderstorm Warning | BGM | Susquehanna, Wayne | 52 min |
| May 16, 7:11 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland, Dauphin, Lebanon, Perry | 64 min |
| May 16, 7:32 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Lebanon, Schuylkill | 58 min |
| May 16, 7:38 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Lebanon | 52 min |
| May 16, 7:49 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 56 min |
| May 16, 8:10 PM EDT | Severe Thunderstorm Warning | CTP | Schuylkill | 65 min |
| May 16, 8:30 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, Lebanon | 47 min |
| May 23, 2:12 PM EDT | Severe Thunderstorm Warning | CTP | Blair | 33 min |
| May 23, 4:16 PM EDT | Severe Thunderstorm Warning | PHI | Northampton | 44 min |
| May 23, 4:40 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Northampton | 37 min |
| May 24, 1:12 PM EDT | Severe Thunderstorm Warning | BGM | Lackawanna, Luzerne | 48 min |
| May 24, 1:51 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver | 39 min |
| May 24, 2:15 PM EDT | Severe Thunderstorm Warning | PHI | Monroe | 45 min |
| May 24, 2:27 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Westmoreland | 33 min |
| May 24, 2:49 PM EDT | Severe Thunderstorm Warning | BGM | Lackawanna, Luzerne | 56 min |
| May 24, 3:05 PM EDT | Severe Thunderstorm Warning | BGM | Bradford | 55 min |
| May 24, 3:09 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming | 66 min |
| May 24, 3:35 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Indiana | 40 min |
| May 24, 4:59 PM EDT | Severe Thunderstorm Warning | CTP | Juniata, Mifflin | 46 min |
| May 24, 5:16 PM EDT | Severe Thunderstorm Warning | PHI | Monroe, Northampton | 59 min |
| May 24, 7:04 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland, Juniata, Perry | 56 min |
| May 24, 7:06 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 54 min |
| May 24, 8:04 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Chester, Delaware, Montgomery | 56 min |
| May 28, 4:09 PM EDT | Severe Thunderstorm Warning | CTP | Warren | 81 min |
| May 28, 4:14 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Fayette, Washington, Westmoreland | 46 min |
| May 28, 4:46 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Westmoreland | 44 min |
| May 28, 5:16 PM EDT | Severe Thunderstorm Warning | CTP | McKean, Warren | 59 min |
| May 28, 6:28 PM EDT | Severe Thunderstorm Warning | PBZ | Greene, Washington | 47 min |
| May 28, 6:34 PM EDT | Severe Thunderstorm Warning | CTP | Blair, Cambria | 41 min |
| May 28, 6:37 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver, Lawrence | 38 min |
| May 28, 6:47 PM EDT | Severe Thunderstorm Warning | CTP | McKean | 58 min |
| May 28, 7:03 PM EDT | Severe Thunderstorm Warning | PBZ | Greene, Washington | 42 min |
| May 28, 8:11 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Greene | 49 min |
| May 28, 8:42 PM EDT | Severe Thunderstorm Warning | CTP | Bedford | 63 min |
| May 29, 1:52 PM EDT | Severe Thunderstorm Warning | CTP | Adams, Cumberland, York | 53 min |
| May 29, 2:13 PM EDT | Severe Thunderstorm Warning | CTP | Adams, Franklin, York | 62 min |
| May 29, 2:22 PM EDT | Severe Thunderstorm Warning | BGM | Susquehanna, Wayne | 21 min |
| May 29, 3:13 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, York | 62 min |
| May 29, 3:28 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester | 62 min |
| May 29, 3:38 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 67 min |
| May 29, 5:10 PM EDT | Severe Thunderstorm Warning | PHI | Delaware, Philadelphia | 42 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Bradford County5
- Allegheny County4
- Westmoreland County4
- Lebanon County4
- McKean County3
- Cumberland County3
- Dauphin County3
- Northampton County3
- Bucks County3
- Chester County3
- Fayette County3
- Washington County3
- Greene County3
- York County3
- Lycoming County2
- Tioga County2
- Susquehanna County2
- Wayne County2
- Perry County2
- Schuylkill County2
- Berks County2
- Lancaster County2
- Blair County2
- Lackawanna County2
- Luzerne County2
- Beaver County2
- Monroe County2
- Juniata County2
- Delaware County2
- Warren County2
- Adams County2
- Crawford County1
- Potter County1
- Cameron County1
- Elk County1
- Armstrong County1
- Indiana County1
- Mifflin County1
- Montgomery County1
- Cambria 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.