Alert archive / Pennsylvania / Severe Thunderstorm Warnings / 2011
Severe Thunderstorm Warnings in Pennsylvania, July 2011
106 severe thunderstorm warnings in July 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 severe thunderstorm warnings reaches back to 1986.
Severe Thunderstorm Warnings by county
Each county as a circle sized by its count in July 2011. Tap one for its archive.
- Severe Thunderstorm Warnings
- 106
- Busiest day
- July 18, 201116 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 |
|---|---|---|---|---|
| Jul 3, 3:20 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Greene | 55 min |
| Jul 3, 4:03 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette | 27 min |
| Jul 3, 4:04 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Lehigh, Northampton | 56 min |
| Jul 3, 4:19 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Northampton | 56 min |
| Jul 3, 4:58 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery | 62 min |
| Jul 4, 6:44 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 32 min |
| Jul 6, 3:23 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 67 min |
| Jul 7, 3:07 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland, Dauphin, Perry, York | 53 min |
| Jul 7, 3:26 PM EDT | Severe Thunderstorm Warning | PHI | Monroe | 64 min |
| Jul 7, 4:35 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 55 min |
| Jul 7, 5:12 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 63 min |
| Jul 7, 9:10 PM EDT | Severe Thunderstorm Warning | PHI | Carbon | 67 min |
| Jul 7, 9:23 PM EDT | Severe Thunderstorm Warning | CTP | Schuylkill | 56 min |
| Jul 7, 9:47 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Lehigh, Northampton | 73 min |
| Jul 7, 10:55 PM EDT | Severe Thunderstorm Warning | PHI | Lehigh, Northampton | 28 min |
| Jul 8, 2:26 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming, Union | 64 min |
| Jul 8, 2:48 PM EDT | Severe Thunderstorm Warning | PHI | Monroe | 57 min |
| Jul 8, 2:51 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 54 min |
| Jul 8, 3:00 PM EDT | Severe Thunderstorm Warning | BGM | Susquehanna, Wyoming | 45 min |
| Jul 8, 3:44 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Carbon, Lehigh, Monroe, Montgomery and 1 more | 76 min |
| Jul 11, 3:27 PM EDT | Severe Thunderstorm Warning | CLE | Erie | 63 min |
| Jul 11, 3:46 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver, Lawrence, Washington | 44 min |
| Jul 11, 4:16 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Washington, Westmoreland | 44 min |
| Jul 11, 4:30 PM EDT | Severe Thunderstorm Warning | PBZ | Greene, Washington | 45 min |
| Jul 11, 5:00 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Fayette, Greene, Washington, Westmoreland | 60 min |
| Jul 11, 5:14 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Armstrong, Indiana, Westmoreland | 61 min |
| Jul 11, 5:52 PM EDT | Severe Thunderstorm Warning | CTP | Bedford, Blair, Cambria, Somerset | 53 min |
| Jul 11, 6:48 PM EDT | Severe Thunderstorm Warning | CTP | Bedford, Blair, Cambria, Fulton, Huntingdon, Somerset | 57 min |
| Jul 18, 12:17 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 43 min |
| Jul 18, 12:44 PM EDT | Severe Thunderstorm Warning | PBZ | Forest, Mercer, Venango | 31 min |
| Jul 18, 3:02 PM EDT | Severe Thunderstorm Warning | PBZ | Butler | 28 min |
| Jul 18, 3:29 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Butler, Westmoreland | 46 min |
| Jul 18, 5:22 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Fayette, Greene, Washington, Westmoreland | 38 min |
| Jul 18, 5:37 PM EDT | Severe Thunderstorm Warning | BGM | Luzerne | 53 min |
| Jul 18, 5:56 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver | 34 min |
| Jul 18, 6:08 PM EDT | Severe Thunderstorm Warning | BGM | Lackawanna, Luzerne, Wyoming | 67 min |
| Jul 18, 6:11 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Butler, Washington | 64 min |
| Jul 18, 6:15 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe, Northampton | 75 min |
| Jul 18, 6:21 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland, Dauphin, Lancaster, Perry, York | 42 min |
| Jul 18, 6:47 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 43 min |
| Jul 18, 7:04 PM EDT | Severe Thunderstorm Warning | BGM | Bradford, Wyoming | 56 min |
| Jul 18, 7:07 PM EDT | Severe Thunderstorm Warning | PHI | Monroe | 83 min |
| Jul 18, 7:12 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Washington | 48 min |
| Jul 18, 7:21 PM EDT | Severe Thunderstorm Warning | PBZ | Greene, Washington | 39 min |
| Jul 18, 9:48 PM EDT | Severe Thunderstorm Warning | BGM | Susquehanna, Wayne | 42 min |
| Jul 19, 2:53 AM EDT | Severe Thunderstorm Warning | BGM | Lackawanna, Susquehanna, Wyoming | 42 min |
| Jul 19, 6:47 PM EDT | Severe Thunderstorm Warning | CTP | Centre | 28 min |
| Jul 19, 8:07 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 53 min |
| Jul 22, 4:02 PM EDT | Severe Thunderstorm Warning | CTP | Adams, Lancaster, York | 58 min |
| Jul 22, 4:34 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, York | 36 min |
| Jul 22, 5:06 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 39 min |
| Jul 22, 5:08 PM EDT | Severe Thunderstorm Warning | PBZ | Lawrence, Mercer | 37 min |
| Jul 22, 5:12 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Butler, Washington | 63 min |
| Jul 22, 5:17 PM EDT | Severe Thunderstorm Warning | PBZ | Mercer | 43 min |
| Jul 22, 5:19 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Butler, Westmoreland | 41 min |
| Jul 22, 5:45 PM EDT | Severe Thunderstorm Warning | PBZ | Butler, Lawrence, Mercer | 47 min |
| Jul 22, 5:48 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Butler, Clarion, Indiana, Westmoreland | 42 min |
| Jul 22, 6:00 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 45 min |
| Jul 22, 6:48 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Greene, Washington | 42 min |
| Jul 22, 7:32 PM EDT | Severe Thunderstorm Warning | CTP | Bedford | 34 min |
| Jul 22, 7:50 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette | 40 min |
| Jul 23, 6:30 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, York | 46 min |
| Jul 23, 7:55 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery | 30 min |
| Jul 23, 10:12 PM EDT | Severe Thunderstorm Warning | CLE | Erie | 35 min |
| Jul 25, 12:19 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe | 56 min |
| Jul 25, 12:45 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Lehigh | 60 min |
| Jul 25, 12:55 PM EDT | Severe Thunderstorm Warning | CTP | McKean, Potter, Warren | 65 min |
| Jul 25, 1:12 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Lancaster, Lebanon | 31 min |
| Jul 25, 1:27 PM EDT | Severe Thunderstorm Warning | BGM | Bradford | 63 min |
| Jul 25, 1:52 PM EDT | Severe Thunderstorm Warning | CTP | Potter, Tioga | 53 min |
| Jul 25, 2:29 PM EDT | Severe Thunderstorm Warning | BGM | Bradford, Susquehanna, Wyoming | 61 min |
| Jul 25, 3:43 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Clinton, Lycoming, Montour, Northumberland, Sullivan and 1 more | 47 min |
| Jul 25, 4:28 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Lycoming, Montour, Northumberland, Snyder, Sullivan and 1 more | 77 min |
| Jul 25, 4:46 PM EDT | Severe Thunderstorm Warning | BGM | Lackawanna, Pike, Wayne | 29 min |
| Jul 25, 5:11 PM EDT | Severe Thunderstorm Warning | BGM | Lackawanna, Luzerne, Wayne | 49 min |
| Jul 25, 5:13 PM EDT | Severe Thunderstorm Warning | BGM | Lackawanna, Pike, Wayne | 62 min |
| Jul 26, 2:04 PM EDT | Severe Thunderstorm Warning | BGM | Bradford, Lackawanna, Susquehanna, Wyoming | 41 min |
| Jul 26, 4:06 PM EDT | Severe Thunderstorm Warning | BGM | Wayne | 54 min |
| Jul 26, 4:37 PM EDT | Severe Thunderstorm Warning | BGM | Wayne | 43 min |
| Jul 26, 4:39 PM EDT | Severe Thunderstorm Warning | BGM | Lackawanna, Luzerne, Pike, Wayne | 55 min |
| Jul 26, 5:01 PM EDT | Severe Thunderstorm Warning | PHI | Monroe | 59 min |
| Jul 26, 5:55 PM EDT | Severe Thunderstorm Warning | PHI | Monroe | 35 min |
| Jul 28, 4:28 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Indiana, Westmoreland | 47 min |
| Jul 28, 5:01 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Indiana | 44 min |
| Jul 28, 5:20 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Butler, Lawrence, Westmoreland | 40 min |
| Jul 28, 5:28 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver, Butler, Lawrence | 32 min |
| Jul 28, 5:59 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Butler, Lawrence | 46 min |
| Jul 28, 6:16 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Armstrong, Butler, Indiana, Westmoreland | 59 min |
| Jul 28, 7:12 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Westmoreland | 33 min |
| Jul 28, 7:33 PM EDT | Severe Thunderstorm Warning | CTP | Bedford, Cambria, Somerset | 57 min |
| Jul 28, 7:43 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Westmoreland | 23 min |
| Jul 29, 2:40 PM EDT | Severe Thunderstorm Warning | BGM | Bradford, Susquehanna | 50 min |
| Jul 29, 3:15 PM EDT | Severe Thunderstorm Warning | BGM | Susquehanna | 60 min |
| Jul 29, 3:39 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Montour, Schuylkill | 66 min |
| Jul 29, 4:04 PM EDT | Severe Thunderstorm Warning | CTP | Blair, Cambria, Huntingdon, Mifflin | 56 min |
| Jul 29, 4:09 PM EDT | Severe Thunderstorm Warning | BGM | Luzerne | 38 min |
| Jul 29, 4:30 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Northumberland, Schuylkill | 60 min |
| Jul 29, 4:40 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Lehigh | 65 min |
| Jul 29, 4:50 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana, Westmoreland | 40 min |
| Jul 29, 4:59 PM EDT | Severe Thunderstorm Warning | BGM | Lackawanna, Wayne | 61 min |
| Jul 29, 5:39 PM EDT | Severe Thunderstorm Warning | BGM | Pike, Wayne | 36 min |
| Jul 29, 5:54 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette | 51 min |
| Jul 29, 6:05 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery | 55 min |
| Jul 29, 6:39 PM EDT | Severe Thunderstorm Warning | CTP | Somerset | 30 min |
| Jul 29, 6:43 PM EDT | Severe Thunderstorm Warning | PHI | Philadelphia | 49 min |
| Jul 29, 7:03 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 46 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Allegheny County14
- Westmoreland County13
- Washington County11
- Butler County11
- Fayette County9
- Wayne County9
- Bucks County8
- Monroe County8
- Beaver County8
- Lackawanna County8
- Susquehanna County7
- Greene County6
- Lehigh County6
- Northampton County6
- Wyoming County6
- Lawrence County6
- Armstrong County6
- Indiana County6
- Montgomery County5
- York County5
- Carbon County5
- Luzerne County5
- Lancaster County5
- Bradford County5
- Chester County4
- Bedford County4
- Cambria County4
- Somerset County4
- Mercer County4
- Pike County4
- Dauphin County3
- Schuylkill County3
- Lycoming County3
- Union County3
- Berks County3
- Blair County3
- Montour County3
- Northumberland County3
- Columbia County3
- Cumberland County2
21 more counties
- Perry County2
- Delaware County2
- Philadelphia County2
- Erie County2
- Huntingdon County2
- Centre County2
- Potter County2
- Sullivan County2
- Fulton County1
- Crawford County1
- Forest County1
- Venango County1
- Adams County1
- Clarion County1
- McKean County1
- Warren County1
- Lebanon County1
- Tioga County1
- Clinton County1
- Snyder County1
- Mifflin 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.