Weather alerts in Pennsylvania, 1989
221 weather alerts in 1989, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered any part of the state, so the counties below add up to more than the state.
Weather alerts by county
Each county as a circle sized by its count in 1989. Tap one for its archive.
- Alerts
- 221
- Warnings
- 221
- Watches
- 0
- Advisories
- 0
- Busiest month
- June113 alerts
- Busiest day
- June 27, 198922 alerts
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, 5:25 AM EDT | Flash Flood Warning | PHI | Chester | 4 hr |
| May 6, 4:52 PM EDT | Severe Thunderstorm Warning | CTP | Adams, York | 53 min |
| May 7, 1:25 AM EDT | Flash Flood Warning | BGM | Wyoming | 6 hr |
| May 10, 5:45 PM EDT | Flash Flood Warning | PBZ | Fayette, Westmoreland | 6 hr |
| May 10, 6:25 PM EDT | Flash Flood Warning | PBZ | Butler | 6 hr |
| May 16, 1:06 PM EDT | Flash Flood Warning | PHI | Chester | 2 hr |
| May 16, 3:44 PM EDT | Flash Flood Warning | CTP | Dauphin | 5 hr |
| May 16, 8:33 PM EDT | Flash Flood Warning | CTP | Franklin | 6 hr |
| 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 | Flash Flood Warning | PHI | Bucks | 83 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, 2:28 PM EDT | Flash Flood Warning | PBZ | Butler | 5 hr |
| Jun 9, 5:33 PM EDT | Flash Flood Warning | CLE | Forest, Venango | 2 hr |
| 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 9, 11:09 PM EDT | Flash Flood Warning | PHI | Delaware | 3 hr |
| Jun 9, 11:36 PM EDT | Flash Flood Warning | PHI | Bucks | 3 hr |
| Jun 15, 11:02 AM EDT | Flash Flood Warning | CLE | Lawrence | 3 hr |
| Jun 15, 11:24 AM EDT | Flash Flood Warning | CLE | Elk | 3 hr |
| Jun 15, 3:36 PM EDT | Flash Flood Warning | PBZ | Allegheny | 3 hr |
| Jun 15, 6:22 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 38 min |
| Jun 15, 6:39 PM EDT | Tornado Warning | CTP | Lancaster | 21 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 16, 10:53 PM EDT | Flash Flood Warning | CTP | Centre | 5 hr |
| Jun 17, 2:35 AM EDT | Flash Flood Warning | PBZ | Butler | 4 hr |
| Jun 19, 9:15 PM EDT | Flash Flood Warning | PBZ | Bedford, Somerset | 6 hr |
| Jun 20, 12:16 PM EDT | Flash Flood Warning | CLE | Elk | 4 hr |
| Jun 20, 2:08 PM EDT | Flash Flood Warning | CLE | Forest, Venango | 2 hr |
| Jun 20, 2:13 PM EDT | Flash Flood Warning | PBZ | Butler | 4 hr |
| Jun 20, 4:13 PM EDT | Flash Flood Warning | CLE | Elk, Forest, McKean, Warren | 4 hr |
| Jun 20, 4:13 PM EDT | Flash Flood Warning | CLE | Venango | 4 hr |
| Jun 20, 4:27 PM EDT | Flash Flood Warning | PBZ | Somerset | 4 hr |
| Jun 20, 4:55 PM EDT | Flash Flood Warning | PBZ | Bedford | 4 hr |
| Jun 20, 6:03 PM EDT | Flash Flood Warning | CTP | Adams | 5 hr |
| Jun 20, 6:20 PM EDT | Flash Flood Warning | PBZ | Blair | 5 hr |
| Jun 20, 7:08 PM EDT | Flash Flood Warning | CLE | Potter | 5 hr |
| Jun 20, 7:11 PM EDT | Flash Flood Warning | CTP | Huntingdon | 2 hr |
| Jun 20, 7:38 PM EDT | Flash Flood Warning | CLE | Cameron | 5 hr |
| Jun 20, 7:41 PM EDT | Flash Flood Warning | CTP | Centre | 4 hr |
| Jun 20, 7:54 PM EDT | Flash Flood Warning | CTP | Juniata | 2 hr |
| Jun 20, 8:09 PM EDT | Severe Thunderstorm Warning | CTP | Franklin | 66 min |
| Jun 20, 8:28 PM EDT | Flash Flood Warning | CLE | Elk | 6 hr |
| Jun 20, 8:45 PM EDT | Flash Flood Warning | PBZ | Bedford, Blair | 3 hr |
| Jun 20, 9:00 PM EDT | Flash Flood Warning | CTP | Perry | 4 hr |
| Jun 20, 9:27 PM EDT | Flash Flood Warning | CTP | Fulton | 4 hr |
| Jun 20, 10:35 PM EDT | Flash Flood Warning | PBZ | Jefferson | 5 hr |
| Jun 20, 11:20 PM EDT | Flash Flood Warning | PBZ | Bedford, Somerset | 5 hr |
| Jun 20, 11:20 PM EDT | Flash Flood Warning | PBZ | Blair | 5 hr |
| Jun 21, 6:03 AM EDT | Flash Flood Warning | PBZ | Allegheny, Beaver, Butler | 3 hr |
| Jun 21, 7:20 AM EDT | Flash Flood Warning | CTP | Lycoming | 5 hr |
| Jun 21, 2:09 PM EDT | Flash Flood Warning | CTP | Huntingdon | 4 hr |
| Jun 21, 3:42 PM EDT | Flash Flood Warning | CTP | Snyder | 3 hr |
| Jun 22, 2:09 PM EDT | Flash Flood Warning | PHI | Bucks, Montgomery, Philadelphia | 2 hr |
| Jun 22, 3:15 PM EDT | Flash Flood Warning | PHI | Delaware | 3 hr |
| Jun 22, 3:50 PM EDT | Flash Flood Warning | PHI | Bucks, Delaware, Montgomery, Philadelphia | 115 min |
| Jun 22, 4:29 PM EDT | Flash Flood Warning | CLE | Mercer | 61 min |
| Jun 22, 4:30 PM EDT | Flash Flood Warning | PHI | Chester, Montgomery | 2 hr |
| Jun 22, 5:20 PM EDT | Flash Flood Warning | CLE | Crawford | 115 min |
| Jun 22, 5:42 PM EDT | Flash Flood Warning | PHI | Bucks | 75 min |
| Jun 22, 7:07 PM EDT | Flash Flood Warning | CLE | Crawford, Erie | 2 hr |
| Jun 22, 7:55 PM EDT | Flash Flood Warning | PBZ | Allegheny | 65 min |
| Jun 22, 8:00 PM EDT | Flash Flood Warning | CTP | York | 4 hr |
| Jun 22, 8:30 PM EDT | Flash Flood Warning | PBZ | Butler | 4 hr |
| Jun 22, 8:44 PM EDT | Flash Flood Warning | PBZ | Allegheny | 3 hr |
| Jun 22, 9:05 PM EDT | Flash Flood Warning | CLE | Elk | 3 hr |
| Jun 22, 9:05 PM EDT | Flash Flood Warning | PBZ | Clearfield, Jefferson | 3 hr |
| Jun 22, 9:23 PM EDT | Flash Flood Warning | PBZ | Cambria | 4 hr |
| Jun 22, 10:45 PM EDT | Flash Flood Warning | CLE | McKean | 2 hr |
| Jun 22, 10:55 PM EDT | Flash Flood Warning | PBZ | Bedford, Blair | 5 hr |
| Jun 22, 11:23 PM EDT | Flash Flood Warning | CLE | Elk | 5 hr |
| Jun 22, 11:23 PM EDT | Flash Flood Warning | PBZ | Jefferson | 5 hr |
| Jun 22, 11:23 PM EDT | Flash Flood Warning | PBZ | Fayette, Somerset | 5 hr |
| Jun 22, 11:30 PM EDT | Flash Flood Warning | CLE | McKean | 5 hr |
| Jun 22, 11:39 PM EDT | Flash Flood Warning | CTP | Adams | 4 hr |
| Jun 22, 11:47 PM EDT | Flash Flood Warning | PBZ | Clarion | 4 hr |
| Jun 23, 1:19 AM EDT | Flash Flood Warning | CTP | Huntingdon | 4 hr |
| Jun 23, 11:01 AM EDT | Flash Flood Warning | PHI | Chester | 119 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, 7:31 PM EDT | Flash Flood Warning | CTP | Cumberland | 3 hr |
| Jun 24, 7:44 PM EDT | Flash Flood Warning | CTP | Snyder | 115 min |
| 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 25, 9:33 PM EDT | Flash Flood Warning | PBZ | Clearfield | 87 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, 2:39 PM EDT | Tornado Warning | CLE | Mercer | 36 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, 3:17 PM EDT | Tornado Warning | CLE | Mercer | 28 min |
| Jun 27, 3:21 PM EDT | Flash Flood Warning | CLE | Venango | 4 hr |
| Jun 27, 3:21 PM EDT | Flash Flood Warning | PBZ | Allegheny, Armstrong, Butler | 4 hr |
| Jun 27, 3:21 PM EDT | Flash Flood Warning | PBZ | Clarion | 4 hr |
| Jun 27, 3:40 PM EDT | Flash Flood Warning | CLE | Mercer | 3 hr |
| 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, 6:50 PM EDT | Flash Flood Warning | SHV | Clarion | 6 hr |
| Jun 27, 7:09 PM EDT | Flash Flood Warning | PBZ | Allegheny | 4 hr |
| Jun 27, 9:05 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery | 40 min |
| Jul 5, 8:38 AM EDT | Flash Flood Warning | PHI | Chester, Delaware | 3 hr |
| Jul 5, 8:38 AM EDT | Flash Flood Warning | PHI | Philadelphia | 3 hr |
| Jul 5, 9:02 AM EDT | Flash Flood Warning | PHI | Bucks | 3 hr |
| Jul 5, 10:41 AM EDT | Flash Flood Warning | PHI | Montgomery | 4 hr |
| Jul 5, 11:00 AM EDT | Flash Flood Warning | PHI | Bucks | 5 hr |
| Jul 5, 11:00 AM EDT | Flash Flood Warning | PHI | Chester, Delaware, Montgomery | 5 hr |
| Jul 5, 11:00 AM EDT | Flash Flood Warning | PHI | Philadelphia | 5 hr |
| 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 | Flash Flood Warning | PBZ | Bedford | 68 min |
| Jul 7, 9:52 PM EDT | Severe Thunderstorm Warning | PBZ | Bedford, Blair | 68 min |
| Jul 7, 11:42 PM EDT | Flash Flood Warning | PBZ | Bedford | 4 hr |
| 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 13, 10:17 AM EDT | Flash Flood Warning | PHI | Montgomery | 118 min |
| Jul 13, 1:31 PM EDT | Flash Flood Warning | PHI | Chester | 119 min |
| Jul 14, 3:19 AM EDT | Severe Thunderstorm Warning | PBZ | Bedford | 41 min |
| Jul 19, 9:35 PM EDT | Flash Flood Warning | PBZ | Bedford | 3 hr |
| Jul 22, 8:02 PM EDT | Flash Flood Warning | CTP | Huntingdon, Juniata, Mifflin | 3 hr |
| Jul 22, 9:34 PM EDT | Flash Flood Warning | CTP | Fulton | 116 min |
| Jul 25, 1:36 AM EDT | Flash Flood Warning | PBZ | Bedford | 72 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, 3:15 PM EDT | Flash Flood Warning | PBZ | Fayette, Somerset | 4 hr |
| Jul 26, 3:35 PM EDT | Severe Thunderstorm Warning | CTP | Franklin | 25 min |
| Jul 26, 5:12 PM EDT | Flash Flood Warning | PBZ | Butler | 3 hr |
| 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 12, 5:11 PM EDT | Flash Flood Warning | PHI | Bucks, Montgomery | 64 min |
| Aug 13, 11:05 AM EDT | Flash Flood Warning | PHI | Bucks | 85 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 |
| Aug 23, 7:30 PM EDT | Flash Flood Warning | PBZ | Fayette, Westmoreland | 3 hr |
| Sep 16, 10:58 PM EDT | Flash Flood Warning | PBZ | Fayette | 3 hr |
| Sep 16, 11:15 PM EDT | Flash Flood Warning | PBZ | Westmoreland | 2 hr |
| Sep 20, 7:42 AM EDT | Flash Flood Warning | PHI | Montgomery | 3 hr |
| Sep 20, 8:14 AM EDT | Flash Flood Warning | PHI | Bucks | 3 hr |
| Sep 20, 2:33 PM EDT | Flash Flood Warning | PHI | Bucks, Montgomery | 3 hr |
| Sep 20, 6:30 PM EDT | Flash Flood Warning | PHI | Bucks, Montgomery | 3 hr |
| Oct 20, 10:25 AM EDT | Flash Flood Warning | PHI | Philadelphia | 65 min |
| Oct 20, 11:20 AM EDT | Flash Flood Warning | CTP | York | 115 min |
| Oct 20, 11:45 AM EDT | Flash Flood Warning | BGM | Wayne | 6 hr |
| Oct 20, 3:05 PM EDT | Flash Flood Warning | PHI | Bucks | 3 hr |
| 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, 10:40 AM EST | Flash Flood Warning | CTP | Lancaster | 3 hr |
| 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 product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
| Product | Alerts |
|---|---|
| Severe storms | |
| Severe Thunderstorm Warning | 110 |
| Tornado Warning | 3 |
| Flooding | |
| Flash Flood Warning | 108 |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Bucks County17
- Montgomery County14
- Butler County14
- Bedford County14
- Chester County13
- Lancaster County9
- Delaware County9
- Jefferson County9
- York County8
- Allegheny County8
- Clarion County8
- Philadelphia County8
- Fayette County7
- Westmoreland County7
- Venango County7
- Elk County7
- Huntingdon County7
- Indiana County7
- Adams County6
- Clearfield County6
- Somerset County6
- Blair County6
- Cambria County6
- Armstrong County6
- Franklin County5
- Mercer County5
- Crawford County5
- Fulton County5
- Washington County4
- Forest County4
- Centre County4
- Juniata County4
- Perry County4
- Lycoming County4
- Snyder County4
- Dauphin County3
- Beaver County3
- Erie County3
- Berks County3
- McKean County3
20 more counties
- Cumberland County3
- Northumberland County3
- Warren County2
- Lawrence County2
- Potter County2
- Clinton County2
- Union County2
- Montour County2
- Bradford County2
- Mifflin County2
- Lebanon County2
- Wyoming County1
- Cameron County1
- Tioga County1
- Wayne County1
- Sullivan County1
- Columbia County1
- Schuylkill County1
- Lehigh County1
- Northampton County1
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. Rebuilt daily.