Alert archive / Pennsylvania / Severe Thunderstorm Warnings
Severe Thunderstorm Warnings in Pennsylvania, 1989
110 severe thunderstorm warnings in 1989. 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 1989. Tap one for its archive.
- Severe Thunderstorm Warnings
- 110
- Busiest month
- June40 severe thunderstorm warnings
- Busiest day
- November 21, 198918 severe thunderstorm warnings
Over time
By month
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 |
|---|---|---|---|---|
| Mar 18, 2:37 PM EST | Severe Thunderstorm Warning | PHI | Chester | 68 min |
| Mar 31, 3:06 PM EST | Severe Thunderstorm Warning | CTP | York | 39 min |
| Mar 31, 3:23 PM EST | Severe Thunderstorm Warning | CTP | Lancaster | 37 min |
| Mar 31, 3:30 PM EST | Severe Thunderstorm Warning | PHI | Chester, Delaware | 60 min |
| Mar 31, 4:15 PM EST | Severe Thunderstorm Warning | PHI | Montgomery | 30 min |
| May 6, 4:52 PM EDT | Severe Thunderstorm Warning | CTP | Adams, York | 53 min |
| May 25, 8:26 AM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Butler | 64 min |
| May 25, 8:26 AM EDT | Severe Thunderstorm Warning | PBZ | Washington | 64 min |
| May 30, 6:22 PM EDT | Severe Thunderstorm Warning | CLE | Venango | 68 min |
| May 30, 6:31 PM EDT | Severe Thunderstorm Warning | CLE | Mercer | 59 min |
| May 30, 6:45 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion | 55 min |
| May 30, 7:25 PM EDT | Severe Thunderstorm Warning | PBZ | Clearfield, Jefferson | 65 min |
| Jun 2, 2:07 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 17 min |
| Jun 3, 6:22 PM EDT | Severe Thunderstorm Warning | CLE | Erie | 53 min |
| Jun 3, 7:23 PM EDT | Severe Thunderstorm Warning | CLE | Crawford, Warren | 67 min |
| Jun 3, 8:09 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver | 51 min |
| Jun 3, 8:22 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 53 min |
| Jun 3, 8:36 PM EDT | Severe Thunderstorm Warning | PBZ | Butler | 54 min |
| Jun 9, 8:17 PM EDT | Severe Thunderstorm Warning | PHI | Philadelphia | 58 min |
| Jun 9, 8:17 PM EDT | Severe Thunderstorm Warning | PHI | Delaware | 58 min |
| Jun 15, 6:22 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 38 min |
| Jun 15, 6:41 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 64 min |
| Jun 15, 6:49 PM EDT | Severe Thunderstorm Warning | CTP | Berks | 56 min |
| Jun 20, 8:09 PM EDT | Severe Thunderstorm Warning | CTP | Franklin | 66 min |
| Jun 24, 5:03 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Westmoreland | 57 min |
| Jun 24, 5:50 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Westmoreland | 55 min |
| Jun 24, 6:25 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Westmoreland | 2 hr |
| Jun 24, 8:29 PM EDT | Severe Thunderstorm Warning | CTP | Huntingdon | 31 min |
| Jun 24, 8:45 PM EDT | Severe Thunderstorm Warning | PBZ | Bedford | 75 min |
| Jun 24, 9:03 PM EDT | Severe Thunderstorm Warning | CTP | Fulton | 42 min |
| Jun 25, 4:21 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 54 min |
| Jun 25, 4:30 PM EDT | Severe Thunderstorm Warning | CTP | Berks | 60 min |
| Jun 25, 4:47 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 43 min |
| Jun 25, 5:08 PM EDT | Severe Thunderstorm Warning | CTP | Centre | 67 min |
| Jun 25, 5:13 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 47 min |
| Jun 25, 6:19 PM EDT | Severe Thunderstorm Warning | CTP | Juniata, Snyder | 41 min |
| Jun 25, 6:30 PM EDT | Severe Thunderstorm Warning | CTP | Perry | 30 min |
| Jun 27, 1:56 PM EDT | Severe Thunderstorm Warning | CLE | Lawrence | 49 min |
| Jun 27, 2:02 PM EDT | Severe Thunderstorm Warning | PBZ | Butler | 58 min |
| Jun 27, 2:28 PM EDT | Severe Thunderstorm Warning | CLE | Potter | 62 min |
| Jun 27, 2:46 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 59 min |
| Jun 27, 2:46 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion, Jefferson | 59 min |
| Jun 27, 3:06 PM EDT | Severe Thunderstorm Warning | CLE | Venango | 69 min |
| Jun 27, 4:07 PM EDT | Severe Thunderstorm Warning | PBZ | Clearfield, Indiana, Jefferson | 68 min |
| Jun 27, 4:15 PM EDT | Severe Thunderstorm Warning | CTP | Clinton, Lycoming | 45 min |
| Jun 27, 4:39 PM EDT | Severe Thunderstorm Warning | CTP | Northumberland | 51 min |
| Jun 27, 5:20 PM EDT | Severe Thunderstorm Warning | CTP | Union | 55 min |
| Jun 27, 5:20 PM EDT | Severe Thunderstorm Warning | CTP | Montour | 55 min |
| Jun 27, 6:03 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 57 min |
| Jun 27, 6:18 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Butler | 57 min |
| Jun 27, 6:44 PM EDT | Severe Thunderstorm Warning | CTP | Northumberland | 46 min |
| Jun 27, 9:05 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery | 40 min |
| Jul 7, 4:23 PM EDT | Severe Thunderstorm Warning | CLE | Elk, Forest | 97 min |
| Jul 7, 4:23 PM EDT | Severe Thunderstorm Warning | CLE | Venango | 97 min |
| Jul 7, 4:37 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion, Jefferson | 68 min |
| Jul 7, 5:41 PM EDT | Severe Thunderstorm Warning | PBZ | Clearfield, Jefferson | 64 min |
| Jul 7, 6:14 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Butler, Clarion | 61 min |
| Jul 7, 6:51 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Indiana | 69 min |
| Jul 7, 6:51 PM EDT | Severe Thunderstorm Warning | PBZ | Blair, Cambria | 69 min |
| Jul 7, 7:57 PM EDT | Severe Thunderstorm Warning | PBZ | Cambria, Indiana, Westmoreland | 63 min |
| Jul 7, 8:20 PM EDT | Severe Thunderstorm Warning | CTP | Bradford | 60 min |
| Jul 7, 8:23 PM EDT | Severe Thunderstorm Warning | PBZ | Bedford, Somerset | 67 min |
| Jul 7, 8:25 PM EDT | Severe Thunderstorm Warning | CTP | Tioga | 30 min |
| Jul 7, 8:40 PM EDT | Severe Thunderstorm Warning | CTP | Huntingdon | 50 min |
| Jul 7, 9:10 PM EDT | Severe Thunderstorm Warning | PBZ | Cambria | 65 min |
| Jul 7, 9:52 PM EDT | Severe Thunderstorm Warning | PBZ | Bedford, Blair | 68 min |
| Jul 8, 12:14 AM EDT | Severe Thunderstorm Warning | PBZ | Bedford | 46 min |
| Jul 10, 5:50 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion, Jefferson | 70 min |
| Jul 10, 6:41 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Clearfield, Indiana | 79 min |
| Jul 10, 6:41 PM EDT | Severe Thunderstorm Warning | PBZ | Butler | 79 min |
| Jul 14, 3:19 AM EDT | Severe Thunderstorm Warning | PBZ | Bedford | 41 min |
| Jul 25, 7:23 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 67 min |
| Jul 26, 3:05 PM EDT | Severe Thunderstorm Warning | CTP | Fulton | 25 min |
| Jul 26, 3:35 PM EDT | Severe Thunderstorm Warning | CTP | Franklin | 25 min |
| Aug 4, 9:00 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana | 45 min |
| Aug 4, 9:28 PM EDT | Severe Thunderstorm Warning | PBZ | Cambria | 47 min |
| Aug 5, 7:43 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana | 62 min |
| Aug 5, 8:37 PM EDT | Severe Thunderstorm Warning | PBZ | Cambria | 53 min |
| Aug 6, 4:13 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong | 62 min |
| Aug 6, 4:15 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming | 45 min |
| Aug 6, 5:07 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana | 68 min |
| Aug 6, 9:20 PM EDT | Severe Thunderstorm Warning | CTP | York | 40 min |
| Aug 15, 11:21 PM EDT | Severe Thunderstorm Warning | CLE | Erie | 69 min |
| Aug 22, 4:42 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 63 min |
| Nov 16, 9:05 AM EST | Severe Thunderstorm Warning | CTP | Adams, York | 55 min |
| Nov 16, 9:57 AM EST | Severe Thunderstorm Warning | CTP | Lancaster | 48 min |
| Nov 16, 10:04 AM EST | Severe Thunderstorm Warning | PHI | Chester | 56 min |
| Nov 16, 10:32 AM EST | Severe Thunderstorm Warning | PHI | Montgomery | 58 min |
| Nov 16, 10:44 AM EST | Severe Thunderstorm Warning | PHI | Delaware | 61 min |
| Nov 16, 10:49 AM EST | Severe Thunderstorm Warning | PHI | Bucks | 56 min |
| Nov 16, 10:54 AM EST | Severe Thunderstorm Warning | PHI | Philadelphia | 66 min |
| Nov 20, 6:50 PM EST | Severe Thunderstorm Warning | CTP | Clinton | 30 min |
| Nov 20, 7:00 PM EST | Severe Thunderstorm Warning | CTP | Bradford, Lycoming, Sullivan | 60 min |
| Nov 20, 7:15 PM EST | Severe Thunderstorm Warning | CTP | Juniata, Mifflin, Northumberland, Perry, Snyder, Union | 60 min |
| Nov 20, 7:15 PM EST | Severe Thunderstorm Warning | CTP | Cumberland, Dauphin, Lebanon | 60 min |
| Nov 20, 7:15 PM EST | Severe Thunderstorm Warning | CTP | Centre | 60 min |
| Nov 20, 7:15 PM EST | Severe Thunderstorm Warning | CTP | Montour | 60 min |
| Nov 20, 7:36 PM EST | Severe Thunderstorm Warning | CTP | Franklin, Fulton, Huntingdon | 69 min |
| Nov 20, 7:36 PM EST | Severe Thunderstorm Warning | CTP | Adams, Lancaster, York | 69 min |
| Nov 20, 8:02 PM EST | Severe Thunderstorm Warning | BGM | Columbia | 58 min |
| Nov 20, 8:14 PM EST | Severe Thunderstorm Warning | CTP | Cumberland, Dauphin, Perry | 46 min |
| Nov 20, 8:14 PM EST | Severe Thunderstorm Warning | CTP | Lebanon | 46 min |
| Nov 20, 8:20 PM EST | Severe Thunderstorm Warning | CTP | Schuylkill | 60 min |
| Nov 20, 8:40 PM EST | Severe Thunderstorm Warning | CTP | Berks, Lehigh | 65 min |
| Nov 20, 8:40 PM EST | Severe Thunderstorm Warning | CTP | Northampton | 65 min |
| Nov 20, 8:44 PM EST | Severe Thunderstorm Warning | PHI | Bucks, Montgomery | 61 min |
| Nov 20, 8:44 PM EST | Severe Thunderstorm Warning | PHI | Chester | 61 min |
| Nov 20, 8:55 PM EST | Severe Thunderstorm Warning | PHI | Delaware, Philadelphia | 65 min |
| Nov 20, 8:56 PM EST | Severe Thunderstorm Warning | CTP | Adams, Franklin | 49 min |
| Nov 20, 8:56 PM EST | Severe Thunderstorm Warning | CTP | Lancaster, York | 49 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Lancaster County7
- Indiana County7
- Chester County6
- York County6
- Butler County6
- Jefferson County6
- Clarion County5
- Armstrong County5
- Bedford County5
- Cambria County5
- Delaware County4
- Montgomery County4
- Adams County4
- Washington County4
- Clearfield County4
- Bucks County4
- Franklin County4
- Westmoreland County4
- Venango County3
- Crawford County3
- Philadelphia County3
- Berks County3
- Huntingdon County3
- Fulton County3
- Perry County3
- Lycoming County3
- Northumberland County3
- Allegheny County2
- Beaver County2
- Erie County2
- Fayette County2
- Centre County2
- Juniata County2
- Snyder County2
- Clinton County2
- Union County2
- Montour County2
- Blair County2
- Bradford County2
- Cumberland County2
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive19881990
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.