Weather alerts in Pennsylvania, 1987
134 weather alerts in 1987, 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 1987. Tap one for its archive.
- Alerts
- 134
- Warnings
- 134
- Watches
- 0
- Advisories
- 0
- Busiest month
- June40 alerts
- Busiest day
- June 30, 198711 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 25, 1:55 PM EST | Severe Thunderstorm Warning | PBZ | Beaver | 65 min |
| Mar 25, 2:10 PM EST | Severe Thunderstorm Warning | PBZ | Allegheny, Butler | 65 min |
| Mar 25, 2:55 PM EST | Severe Thunderstorm Warning | PBZ | Armstrong, Clarion | 50 min |
| Mar 25, 3:20 PM EST | Severe Thunderstorm Warning | PBZ | Fayette, Westmoreland | 70 min |
| Mar 25, 5:55 PM EST | Severe Thunderstorm Warning | PBZ | Washington | 65 min |
| Apr 4, 3:17 PM EST | Flash Flood Warning | PBZ | Cambria | 6 hr |
| Apr 27, 6:45 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Butler | 75 min |
| Apr 27, 7:00 PM EDT | Severe Thunderstorm Warning | CLE | Lawrence | 60 min |
| Apr 27, 7:50 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Westmoreland | 70 min |
| Apr 27, 7:50 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Butler | 40 min |
| May 14, 9:02 PM EDT | Severe Thunderstorm Warning | CLE | Erie | 58 min |
| May 23, 2:35 PM EDT | Severe Thunderstorm Warning | CTP | Adams | 65 min |
| May 23, 3:25 PM EDT | Severe Thunderstorm Warning | CTP | Juniata, Snyder | 65 min |
| May 23, 3:25 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin | 65 min |
| May 26, 6:30 PM EDT | Flash Flood Warning | PBZ | Allegheny, Westmoreland | 4 hr |
| May 26, 6:30 PM EDT | Flash Flood Warning | PBZ | Indiana | 4 hr |
| May 26, 7:35 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Washington, Westmoreland | 55 min |
| May 28, 3:31 PM EDT | Severe Thunderstorm Warning | CLE | Lawrence | 59 min |
| May 28, 6:25 PM EDT | Severe Thunderstorm Warning | CTP | Sullivan | 35 min |
| May 30, 1:38 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 67 min |
| May 30, 1:52 PM EDT | Severe Thunderstorm Warning | CLE | Erie | 68 min |
| May 30, 2:22 PM EDT | Severe Thunderstorm Warning | PBZ | Butler | 68 min |
| May 30, 2:50 PM EDT | Severe Thunderstorm Warning | CLE | Crawford, Erie | 60 min |
| May 30, 6:25 PM EDT | Severe Thunderstorm Warning | CLE | Potter | 65 min |
| May 30, 7:55 PM EDT | Severe Thunderstorm Warning | PBZ | Blair | 65 min |
| May 30, 8:29 PM EDT | Severe Thunderstorm Warning | CTP | Centre | 61 min |
| May 30, 8:55 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver | 65 min |
| May 30, 9:20 PM EDT | Severe Thunderstorm Warning | PBZ | Butler | 60 min |
| May 30, 9:39 PM EDT | Severe Thunderstorm Warning | CTP | Centre | 61 min |
| May 30, 10:33 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Indiana | 57 min |
| May 30, 11:15 PM EDT | Severe Thunderstorm Warning | PBZ | Jefferson | 65 min |
| Jun 1, 5:15 PM EDT | Flash Flood Warning | PBZ | Allegheny, Westmoreland | 4 hr |
| Jun 8, 6:25 PM EDT | Tornado Warning | PBZ | Beaver | 65 min |
| Jun 8, 6:41 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Butler | 59 min |
| Jun 8, 7:01 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Westmoreland | 59 min |
| Jun 8, 7:25 PM EDT | Severe Thunderstorm Warning | CTP | Centre | 65 min |
| Jun 13, 1:39 PM EDT | Severe Thunderstorm Warning | CTP | Fulton | 41 min |
| Jun 13, 2:36 PM EDT | Severe Thunderstorm Warning | CLE | McKean | 54 min |
| Jun 13, 2:45 PM EDT | Severe Thunderstorm Warning | PBZ | Cambria, Somerset | 60 min |
| Jun 13, 3:05 PM EDT | Severe Thunderstorm Warning | CTP | Clinton | 65 min |
| Jun 13, 3:21 PM EDT | Severe Thunderstorm Warning | CTP | Centre | 59 min |
| Jun 15, 5:25 PM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 50 min |
| Jun 15, 6:00 PM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 50 min |
| Jun 15, 6:05 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 45 min |
| Jun 15, 6:22 PM EDT | Flash Flood Warning | PBZ | Westmoreland | 3 hr |
| Jun 15, 9:00 PM EDT | Flash Flood Warning | PBZ | Westmoreland | 90 min |
| Jun 21, 7:12 PM EDT | Severe Thunderstorm Warning | PBZ | Butler | 58 min |
| Jun 21, 7:37 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Clarion | 53 min |
| Jun 21, 8:30 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion, Jefferson | 60 min |
| Jun 23, 12:50 AM EDT | Flash Flood Warning | PBZ | Allegheny, Westmoreland | 3 hr |
| Jun 27, 9:04 PM EDT | Severe Thunderstorm Warning | CLE | Erie | 28 min |
| Jun 29, 4:07 PM EDT | Severe Thunderstorm Warning | CLE | Crawford, Erie | 53 min |
| Jun 29, 4:40 PM EDT | Severe Thunderstorm Warning | CLE | Crawford, Erie | 80 min |
| Jun 29, 4:49 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver | 61 min |
| Jun 29, 5:09 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Washington | 66 min |
| Jun 29, 6:02 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Washington, Westmoreland | 58 min |
| Jun 29, 6:29 PM EDT | Severe Thunderstorm Warning | PBZ | Washington, Westmoreland | 61 min |
| Jun 29, 7:00 PM EDT | Tornado Warning | PBZ | Fayette | 60 min |
| Jun 29, 7:35 PM EDT | Severe Thunderstorm Warning | PBZ | Greene | 70 min |
| Jun 29, 7:52 PM EDT | Severe Thunderstorm Warning | PBZ | Greene | 68 min |
| Jun 29, 9:08 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 67 min |
| Jun 29, 9:08 PM EDT | Severe Thunderstorm Warning | PBZ | Greene | 67 min |
| Jun 29, 9:35 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 55 min |
| Jun 29, 10:18 PM EDT | Severe Thunderstorm Warning | CLE | Crawford, Erie | 57 min |
| Jun 29, 11:50 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver | 40 min |
| Jun 29, 11:50 PM EDT | Severe Thunderstorm Warning | PBZ | Butler | 70 min |
| Jun 30, 2:56 PM EDT | Severe Thunderstorm Warning | CTP | York | 64 min |
| Jun 30, 4:15 PM EDT | Severe Thunderstorm Warning | CTP | Adams | 65 min |
| Jun 30, 4:33 PM EDT | Severe Thunderstorm Warning | CTP | Berks | 57 min |
| Jun 30, 6:55 PM EDT | Severe Thunderstorm Warning | PBZ | Butler | 50 min |
| Jun 30, 7:20 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 55 min |
| Jun 30, 8:05 PM EDT | Tornado Warning | PBZ | Allegheny, Westmoreland | 55 min |
| Jul 2, 5:52 PM EDT | Flash Flood Warning | CLE | Crawford, Erie, Warren | 2 hr |
| Jul 2, 11:02 PM EDT | Flash Flood Warning | PHI | Bucks | 4 hr |
| Jul 9, 5:14 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 61 min |
| Jul 10, 9:13 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Butler | 57 min |
| Jul 11, 7:10 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming | 60 min |
| Jul 11, 8:07 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming | 53 min |
| Jul 12, 3:38 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland | 62 min |
| Jul 12, 3:56 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery | 34 min |
| Jul 12, 5:15 PM EDT | Severe Thunderstorm Warning | CTP | York | 65 min |
| Jul 13, 4:49 PM EDT | Severe Thunderstorm Warning | CTP | Huntingdon | 61 min |
| Jul 25, 5:11 PM EDT | Severe Thunderstorm Warning | CLE | Venango | 54 min |
| Jul 25, 5:15 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion | 75 min |
| Jul 25, 5:55 PM EDT | Severe Thunderstorm Warning | PBZ | Butler | 65 min |
| Jul 26, 11:13 AM EDT | Severe Thunderstorm Warning | CTP | Lehigh, Northampton | 57 min |
| Jul 26, 11:33 AM EDT | Severe Thunderstorm Warning | PHI | Bucks | 42 min |
| Jul 26, 11:42 AM EDT | Severe Thunderstorm Warning | CTP | Berks | 58 min |
| Jul 26, 2:20 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, York | 70 min |
| Jul 30, 2:36 PM EDT | Severe Thunderstorm Warning | CTP | Monroe | 64 min |
| Aug 2, 3:10 PM EDT | Severe Thunderstorm Warning | CLE | Crawford, Erie | 65 min |
| Aug 2, 4:14 PM EDT | Severe Thunderstorm Warning | CLE | Mercer | 46 min |
| Aug 2, 4:45 PM EDT | Severe Thunderstorm Warning | CTP | Huntingdon | 60 min |
| Aug 2, 6:07 PM EDT | Severe Thunderstorm Warning | CLE | Lawrence | 53 min |
| Aug 2, 6:18 PM EDT | Severe Thunderstorm Warning | CLE | Crawford, Erie | 72 min |
| Aug 2, 6:30 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Butler | 60 min |
| Aug 2, 7:09 PM EDT | Severe Thunderstorm Warning | CLE | Lawrence | 66 min |
| Aug 2, 8:43 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 57 min |
| Aug 2, 9:40 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Washington | 50 min |
| Aug 9, 5:54 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 26 min |
| Aug 9, 6:27 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 63 min |
| Aug 9, 7:25 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 65 min |
| Aug 9, 9:21 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 59 min |
| Aug 9, 9:30 PM EDT | Tornado Warning | CLE | Erie | 30 min |
| Aug 9, 10:08 PM EDT | Severe Thunderstorm Warning | PHI | Delaware | 37 min |
| Sep 8, 6:45 PM EDT | Flash Flood Warning | CTP | Lancaster | 3 hr |
| Sep 8, 9:30 PM EDT | Flash Flood Warning | CTP | Lancaster | 3 hr |
| Sep 8, 11:11 PM EDT | Flash Flood Warning | PHI | Montgomery | 4 hr |
| Sep 8, 11:25 PM EDT | Flash Flood Warning | CTP | Lancaster | 3 hr |
| Sep 11, 4:00 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana, Westmoreland | 60 min |
| Sep 12, 8:20 PM EDT | Flash Flood Warning | CTP | Cumberland | 4 hr |
| Sep 12, 8:44 PM EDT | Flash Flood Warning | CTP | Dauphin | 4 hr |
| Sep 12, 9:56 PM EDT | Flash Flood Warning | CTP | Cumberland | 6 hr |
| Sep 13, 1:17 AM EDT | Flash Flood Warning | CLE | Cameron, McKean, Potter | 5 hr |
| Sep 13, 1:17 AM EDT | Flash Flood Warning | CLE | Elk | 5 hr |
| Sep 13, 4:05 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Butler | 55 min |
| Sep 17, 1:56 PM EDT | Severe Thunderstorm Warning | CLE | Erie | 64 min |
| Sep 17, 2:35 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver | 55 min |
| Sep 17, 2:58 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 62 min |
| Sep 17, 3:50 PM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 70 min |
| Sep 17, 4:24 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 66 min |
| Sep 17, 5:48 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana, Westmoreland | 57 min |
| Sep 17, 6:00 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 60 min |
| Sep 17, 7:19 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 61 min |
| Sep 17, 8:54 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland | 56 min |
| Sep 17, 9:04 PM EDT | Flash Flood Warning | CTP | Cumberland | 3 hr |
| Sep 17, 11:22 PM EDT | Flash Flood Warning | PBZ | Fayette, Westmoreland | 3 hr |
| Sep 17, 11:23 PM EDT | Severe Thunderstorm Warning | CTP | Adams | 57 min |
| Sep 18, 5:26 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 64 min |
| Sep 22, 2:43 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 62 min |
| Sep 22, 3:56 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery | 34 min |
| Sep 22, 3:58 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Montgomery | 42 min |
| Sep 22, 4:34 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 41 min |
| Sep 22, 4:34 PM EDT | Severe Thunderstorm Warning | PHI | Montgomery, Philadelphia | 41 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 | 4 |
| Flooding | |
| Flash Flood Warning | 20 |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Westmoreland County18
- Allegheny County17
- Butler County13
- Erie County12
- Washington County10
- Beaver County8
- Crawford County8
- Armstrong County7
- Lancaster County7
- Bucks County6
- Cumberland County5
- Montgomery County5
- Clarion County4
- Fayette County4
- Lawrence County4
- Indiana County4
- Centre County4
- Chester County4
- Adams County3
- Greene County3
- York County3
- Cambria County2
- Dauphin County2
- Potter County2
- Jefferson County2
- McKean County2
- Berks County2
- Lycoming County2
- Delaware County2
- Huntingdon County2
- Juniata County1
- Snyder County1
- Sullivan County1
- Blair County1
- Fulton County1
- Somerset County1
- Clinton County1
- Warren County1
- Venango County1
- Lehigh County1
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive19861988
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.