Weather alerts in Pennsylvania, 1999
568 weather alerts in 1999, 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 1999. Tap one for its archive.
- Alerts
- 568
- Warnings
- 538
- Watches
- 30
- Advisories
- 0
- Busiest month
- July192 alerts
- Busiest day
- July 10, 199938 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 |
|---|---|---|---|---|
| Jan 3, 3:41 PM EST | Flash Flood Warning | PHI | Chester | 2 hr |
| Jan 9, 1:40 PM EST | Flash Flood Warning | PHI | Berks, Lehigh | 4 hr |
| Jan 18, 10:33 AM EST | Flash Flood Warning | CTP | Lancaster | 3 hr |
| Jan 18, 1:25 PM EST | Flash Flood Warning | CTP | Lancaster | 4 hr |
| Jan 18, 1:33 PM EST | Severe Thunderstorm Warning | CTP | Centre, Huntingdon, Mifflin | 77 min |
| Jan 18, 1:33 PM EST | Severe Thunderstorm Warning | CTP | Bedford, Franklin, Fulton | 77 min |
| Jan 18, 1:33 PM EST | Severe Thunderstorm Warning | CTP | Blair | 77 min |
| Jan 18, 2:19 PM EST | Severe Thunderstorm Warning | CTP | Cumberland, Dauphin, Juniata, Northumberland, Perry, Snyder | 61 min |
| Jan 18, 2:19 PM EST | Severe Thunderstorm Warning | CTP | Adams, York | 61 min |
| Jan 18, 2:19 PM EST | Severe Thunderstorm Warning | CTP | Union | 61 min |
| Jan 18, 2:28 PM EST | Severe Thunderstorm Warning | CTP | Lycoming | 47 min |
| Jan 18, 3:03 PM EST | Flash Flood Warning | CTP | Columbia, Lycoming, Montour, Northumberland, Sullivan | 4 hr |
| Jan 18, 3:03 PM EST | Flash Flood Warning | CTP | Lebanon, Schuylkill | 4 hr |
| Jan 18, 3:15 PM EST | Flash Flood Warning | PHI | Berks | 3 hr |
| Jan 18, 4:05 PM EST | Flash Flood Warning | CTP | Lancaster | 3 hr |
| Jan 18, 5:15 PM EST | Flash Flood Warning | BGM | Luzerne | 3 hr |
| Jan 18, 6:20 PM EST | Flash Flood Warning | PHI | Berks, Lehigh, Montgomery, Northampton | 4 hr |
| Jan 18, 7:10 PM EST | Flash Flood Warning | CTP | Lancaster, Lebanon | 5 hr |
| Jan 18, 10:25 PM EST | Flash Flood Warning | CTP | Lancaster, Lebanon | 6 hr |
| Jan 18, 11:10 PM EST | Flash Flood Warning | CTP | York | 5 hr |
| Jan 19, 1:38 PM EST | Flash Flood Warning | CTP | Lycoming | 5 hr |
| Jan 23, 11:50 AM EST | Flash Flood Warning | PBZ | Clarion | 4 hr |
| Jan 23, 12:31 PM EST | Flash Flood Warning | PBZ | Butler | 9 hr |
| Jan 23, 2:30 PM EST | Flash Flood Warning | PBZ | Lawrence | 8 hr |
| Jan 23, 5:25 PM EST | Flash Flood Warning | CTP | Bedford, Blair, Cambria, Clearfield | 6 hr |
| Jan 23, 5:25 PM EST | Flash Flood Warning | CTP | Somerset | 6 hr |
| Jan 23, 5:35 PM EST | Severe Thunderstorm Warning | CTP | Bedford | 50 min |
| Jan 23, 6:34 PM EST | Severe Thunderstorm Warning | CTP | Huntingdon | 46 min |
| Jan 23, 7:32 PM EST | Flash Flood Warning | CTP | Huntingdon | 6 hr |
| Jan 23, 10:40 PM EST | Flash Flood Warning | CTP | Centre | 6 hr |
| Jan 23, 11:01 PM EST | Flash Flood Warning | CTP | Juniata, Mifflin | 6 hr |
| Jan 23, 11:54 PM EST | Flash Flood Warning | PBZ | Lawrence | 8 hr |
| Jan 24, 1:58 AM EST | Flash Flood Warning | CTP | Huntingdon | 3 hr |
| Jan 24, 3:58 AM EST | Flash Flood Warning | CTP | Northumberland, Union | 4 hr |
| Jan 24, 4:39 AM EST | Flash Flood Warning | CTP | Centre, Huntingdon, Juniata, Mifflin | 3 hr |
| Jan 24, 7:30 AM EST | Flash Flood Warning | PBZ | Lawrence | 5 hr |
| Jan 24, 7:51 AM EST | Flash Flood Warning | CTP | Centre | 4 hr |
| Jan 24, 7:51 AM EST | Flash Flood Warning | CTP | Juniata | 4 hr |
| Jan 24, 8:00 AM EST | Flash Flood Warning | CTP | Columbia, Northumberland | 4 hr |
| Jan 24, 8:00 AM EST | Flash Flood Warning | CTP | Union | 4 hr |
| Jan 24, 9:23 AM EST | Flash Flood Warning | CTP | Huntingdon | 3 hr |
| Jan 24, 11:59 AM EST | Flash Flood Warning | CTP | Huntingdon | 4 hr |
| Jan 24, 11:59 AM EST | Flash Flood Warning | CTP | Columbia | 4 hr |
| Jan 24, 11:59 AM EST | Flash Flood Warning | CTP | Union | 4 hr |
| Jan 24, 12:55 PM EST | Flash Flood Warning | PBZ | Mercer | 4 hr |
| Jan 24, 1:16 PM EST | Flash Flood Warning | CTP | Lycoming | 3 hr |
| Jan 24, 4:45 PM EST | Flash Flood Warning | PBZ | Mercer | 6 hr |
| Jan 24, 10:10 PM EST | Flash Flood Warning | PBZ | Mercer | 7 hr |
| Jan 25, 4:50 AM EST | Flash Flood Warning | PBZ | Mercer | 5 hr |
| Feb 12, 12:33 PM EST | Severe Thunderstorm Warning | CTP | Cumberland, Franklin, Perry | 57 min |
| Feb 12, 2:50 PM EST | Severe Thunderstorm Warning | CTP | York | 60 min |
| Feb 12, 2:56 PM EST | Severe Thunderstorm Warning | CTP | Lancaster | 59 min |
| Feb 12, 3:58 PM EST | Severe Thunderstorm Warning | CTP | Lancaster | 32 min |
| Feb 12, 5:33 PM EST | Severe Thunderstorm Warning | PHI | Bucks | 32 min |
| Mar 3, 6:30 PM EST | Severe Thunderstorm Watch | SPC | Adams, Berks, Bucks, Carbon, Centre, Chester and 26 more | 7 hr |
| Mar 3, 6:57 PM EST | Severe Thunderstorm Warning | CTP | Franklin, Fulton | 43 min |
| Mar 3, 7:13 PM EST | Severe Thunderstorm Warning | CTP | Lycoming | 47 min |
| Mar 3, 7:55 PM EST | Severe Thunderstorm Warning | CTP | Juniata, Mifflin | 50 min |
| Mar 3, 9:48 PM EST | Flash Flood Warning | CTP | Clinton, Lycoming | 3 hr |
| Mar 21, 7:57 PM EST | Flash Flood Warning | PHI | Chester | 6 hr |
| Mar 21, 8:47 PM EST | Flash Flood Warning | CTP | Lancaster, York | 5 hr |
| Mar 21, 9:10 PM EST | Flash Flood Warning | PHI | Berks | 5 hr |
| Mar 21, 9:40 PM EST | Flash Flood Warning | PHI | Carbon, Lehigh, Monroe | 4 hr |
| Mar 21, 10:34 PM EST | Flash Flood Warning | PHI | Montgomery | 3 hr |
| Mar 21, 11:15 PM EST | Flash Flood Warning | PHI | Bucks | 3 hr |
| Mar 21, 11:50 PM EST | Flash Flood Warning | PHI | Philadelphia | 3 hr |
| Mar 22, 12:19 AM EST | Flash Flood Warning | PHI | Bucks, Delaware, Montgomery, Philadelphia | 3 hr |
| Mar 22, 12:19 AM EST | Flash Flood Warning | PHI | Carbon, Lehigh, Monroe, Northampton | 3 hr |
| Mar 22, 12:19 AM EST | Flash Flood Warning | PHI | Berks, Chester | 3 hr |
| Apr 9, 12:30 PM EDT | Severe Thunderstorm Watch | SPC | Allegheny, Armstrong, Beaver, Fayette, Greene, Washington and 1 more | 6 hr |
| Apr 9, 2:33 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 58 min |
| Apr 9, 2:44 PM EDT | Severe Thunderstorm Warning | PBZ | Greene | 59 min |
| Apr 9, 2:52 PM EDT | Flash Flood Warning | PBZ | Allegheny, Washington | 3 hr |
| Apr 9, 2:54 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 60 min |
| Apr 9, 2:58 PM EDT | Flash Flood Warning | PBZ | Fayette, Greene | 3 hr |
| Apr 9, 3:11 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Westmoreland | 79 min |
| Apr 9, 3:39 PM EDT | Tornado Warning | PBZ | Westmoreland | 51 min |
| Apr 9, 3:47 PM EDT | Severe Thunderstorm Warning | CTP | Somerset | 43 min |
| Apr 9, 4:00 PM EDT | Severe Thunderstorm Watch | SPC | Bedford, Somerset | 5 hr |
| Apr 9, 4:06 PM EDT | Flash Flood Warning | PBZ | Beaver | 2 hr |
| Apr 9, 4:19 PM EDT | Flash Flood Warning | PBZ | Westmoreland | 3 hr |
| Apr 9, 4:23 PM EDT | Flash Flood Warning | PBZ | Butler | 3 hr |
| Apr 9, 5:51 PM EDT | Flash Flood Warning | PBZ | Washington, Westmoreland | 4 hr |
| Apr 9, 6:59 PM EDT | Flash Flood Warning | PBZ | Fayette | 3 hr |
| Apr 9, 9:46 PM EDT | Flash Flood Warning | PBZ | Fayette, Washington, Westmoreland | 6 hr |
| Apr 11, 2:29 PM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 61 min |
| Apr 11, 4:16 PM EDT | Severe Thunderstorm Warning | PBZ | Mercer | 29 min |
| Apr 11, 4:32 PM EDT | Severe Thunderstorm Warning | PBZ | Venango | 43 min |
| Apr 21, 11:50 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver | 40 min |
| Apr 22, 12:44 AM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver | 42 min |
| Apr 22, 12:44 AM EDT | Severe Thunderstorm Warning | PBZ | Lawrence | 42 min |
| Apr 22, 12:59 AM EDT | Flash Flood Warning | PBZ | Allegheny | 91 min |
| Apr 22, 1:05 AM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 60 min |
| Apr 22, 3:06 AM EDT | Flash Flood Warning | CTP | Cambria | 5 hr |
| Apr 23, 1:24 PM EDT | Severe Thunderstorm Warning | PBZ | Greene | 43 min |
| Apr 23, 1:45 PM EDT | Severe Thunderstorm Watch | SPC | Allegheny, Fayette, Greene, Somerset, Washington, Westmoreland | 5 hr |
| Apr 23, 1:54 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette | 41 min |
| Apr 23, 2:19 PM EDT | Severe Thunderstorm Warning | CTP | Somerset | 56 min |
| Apr 23, 2:40 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 35 min |
| May 7, 6:37 PM EDT | Severe Thunderstorm Warning | CTP | Somerset | 38 min |
| May 7, 8:00 PM EDT | Severe Thunderstorm Warning | CTP | Bedford | 30 min |
| May 8, 3:24 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery | 46 min |
| May 8, 5:14 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming, Tioga | 61 min |
| May 8, 5:14 PM EDT | Severe Thunderstorm Warning | CTP | Union | 61 min |
| May 8, 5:28 PM EDT | Severe Thunderstorm Warning | BGM | Bradford | 62 min |
| May 8, 5:32 PM EDT | Severe Thunderstorm Warning | CTP | Northumberland, Snyder | 58 min |
| May 8, 5:32 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Montour | 58 min |
| May 8, 5:44 PM EDT | Severe Thunderstorm Warning | CTP | Sullivan | 61 min |
| May 8, 6:07 PM EDT | Severe Thunderstorm Warning | CTP | Columbia | 53 min |
| May 12, 6:21 PM EDT | Severe Thunderstorm Warning | CTP | Huntingdon | 24 min |
| May 12, 6:44 PM EDT | Severe Thunderstorm Warning | CTP | Huntingdon, Juniata, Mifflin | 46 min |
| May 18, 3:48 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 57 min |
| May 18, 5:36 PM EDT | Severe Thunderstorm Warning | PBZ | Greene | 54 min |
| May 18, 6:56 PM EDT | Flash Flood Warning | PBZ | Allegheny | 3 hr |
| May 18, 9:55 PM EDT | Flash Flood Warning | PBZ | Allegheny | 4 hr |
| May 24, 9:05 AM EDT | Severe Thunderstorm Watch | SPC | Berks, Bucks, Chester, Delaware, Lehigh, Monroe and 3 more | 6 hr |
| May 24, 10:08 AM EDT | Severe Thunderstorm Warning | PHI | Bucks | 32 min |
| May 24, 10:58 AM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 59 min |
| May 24, 11:15 AM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 58 min |
| May 24, 11:24 AM EDT | Severe Thunderstorm Warning | PBZ | Armstrong | 57 min |
| May 24, 12:04 PM EDT | Severe Thunderstorm Warning | CTP | Cambria, Clearfield | 56 min |
| May 24, 12:08 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana | 30 min |
| May 24, 12:25 PM EDT | Flash Flood Warning | PHI | Bucks, Philadelphia | 3 hr |
| May 24, 12:43 PM EDT | Severe Thunderstorm Warning | CTP | Cameron, Clinton | 62 min |
| May 24, 12:43 PM EDT | Severe Thunderstorm Warning | CTP | Centre | 62 min |
| May 24, 1:00 PM EDT | Severe Thunderstorm Watch | SPC | Adams, Berks, Bradford, Bucks, Carbon, Chester and 25 more | 6 hr |
| May 24, 2:03 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming, Tioga | 57 min |
| May 24, 2:40 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Sullivan | 50 min |
| May 24, 2:40 PM EDT | Severe Thunderstorm Warning | CTP | Northumberland, Snyder, Union | 50 min |
| May 24, 2:40 PM EDT | Severe Thunderstorm Warning | CTP | Montour | 50 min |
| May 24, 2:51 PM EDT | Severe Thunderstorm Warning | BGM | Bradford | 64 min |
| May 24, 3:11 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 29 min |
| May 24, 3:18 PM EDT | Severe Thunderstorm Warning | BGM | Luzerne, Wyoming | 62 min |
| May 24, 3:26 PM EDT | Severe Thunderstorm Warning | PHI | Delaware | 34 min |
| May 24, 3:40 PM EDT | Severe Thunderstorm Warning | PHI | Philadelphia | 30 min |
| May 24, 3:47 PM EDT | Severe Thunderstorm Warning | BGM | Susquehanna | 63 min |
| May 24, 4:26 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 34 min |
| Jun 2, 12:43 PM EDT | Severe Thunderstorm Warning | CTP | Huntingdon, Mifflin | 62 min |
| Jun 2, 2:41 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Lancaster, Lebanon, York | 49 min |
| Jun 2, 2:41 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland | 49 min |
| Jun 2, 2:48 PM EDT | Severe Thunderstorm Warning | CTP | Somerset | 42 min |
| Jun 2, 3:10 PM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 35 min |
| Jun 2, 3:13 PM EDT | Severe Thunderstorm Warning | CTP | Cambria | 62 min |
| Jun 2, 3:25 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, Lebanon, Schuylkill | 50 min |
| Jun 2, 3:25 PM EDT | Severe Thunderstorm Warning | CTP | York | 50 min |
| Jun 2, 4:07 PM EDT | Severe Thunderstorm Warning | CTP | Bedford, Blair | 53 min |
| Jun 2, 4:20 PM EDT | Severe Thunderstorm Warning | CTP | Centre | 55 min |
| Jun 2, 4:32 PM EDT | Severe Thunderstorm Warning | CTP | Fulton, Huntingdon | 58 min |
| Jun 2, 4:34 PM EDT | Severe Thunderstorm Warning | CTP | Clearfield | 41 min |
| Jun 2, 5:14 PM EDT | Severe Thunderstorm Warning | CTP | Franklin, Juniata, Mifflin, Perry | 61 min |
| Jun 2, 5:14 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland | 61 min |
| Jun 2, 5:14 PM EDT | Severe Thunderstorm Warning | CTP | Clinton | 61 min |
| Jun 2, 5:27 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming, Union | 78 min |
| Jun 2, 5:27 PM EDT | Severe Thunderstorm Warning | CTP | Centre | 78 min |
| Jun 2, 5:27 PM EDT | Severe Thunderstorm Warning | CTP | Snyder | 78 min |
| Jun 2, 5:47 PM EDT | Severe Thunderstorm Warning | CTP | Tioga | 73 min |
| Jun 2, 5:55 PM EDT | Severe Thunderstorm Warning | CTP | Adams, Franklin | 65 min |
| Jun 2, 7:15 PM EDT | Severe Thunderstorm Warning | CTP | Adams, York | 60 min |
| Jun 7, 1:16 PM EDT | Severe Thunderstorm Warning | CTP | McKean, Warren | 44 min |
| Jun 7, 1:45 PM EDT | Severe Thunderstorm Watch | SPC | Bradford, Cameron, Elk, Lackawanna, Lycoming, McKean and 5 more | 5 hr |
| Jun 7, 2:09 PM EDT | Severe Thunderstorm Warning | CTP | McKean | 36 min |
| Jun 7, 2:25 PM EDT | Severe Thunderstorm Warning | CTP | Clinton | 65 min |
| Jun 7, 2:32 PM EDT | Severe Thunderstorm Warning | CTP | Tioga | 58 min |
| Jun 7, 2:57 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming | 63 min |
| Jun 7, 3:01 PM EDT | Severe Thunderstorm Warning | CTP | Clearfield | 59 min |
| Jun 7, 3:10 PM EDT | Severe Thunderstorm Warning | BGM | Bradford | 60 min |
| Jun 7, 3:30 PM EDT | Severe Thunderstorm Warning | CTP | Tioga | 45 min |
| Jun 7, 3:39 PM EDT | Severe Thunderstorm Warning | BGM | Susquehanna | 66 min |
| Jun 7, 4:11 PM EDT | Severe Thunderstorm Warning | CTP | Northumberland, Union | 49 min |
| Jun 7, 4:11 PM EDT | Severe Thunderstorm Warning | CTP | Montour | 49 min |
| Jun 7, 4:16 PM EDT | Severe Thunderstorm Warning | BGM | Bradford | 64 min |
| Jun 7, 4:19 PM EDT | Severe Thunderstorm Warning | BGM | Wayne | 61 min |
| Jun 7, 4:26 PM EDT | Severe Thunderstorm Warning | CTP | Tioga | 49 min |
| Jun 7, 4:29 PM EDT | Severe Thunderstorm Warning | BGM | Wyoming | 76 min |
| Jun 7, 4:30 PM EDT | Severe Thunderstorm Watch | SPC | Carbon, Lackawanna, Lehigh, Luzerne, Monroe, Northampton and 4 more | 6 hr |
| Jun 7, 4:31 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Lycoming | 59 min |
| Jun 7, 4:58 PM EDT | Severe Thunderstorm Warning | CTP | Montour | 32 min |
| Jun 7, 5:11 PM EDT | Severe Thunderstorm Warning | BGM | Luzerne | 64 min |
| Jun 7, 5:13 PM EDT | Severe Thunderstorm Warning | BGM | Lackawanna | 62 min |
| Jun 7, 5:30 PM EDT | Severe Thunderstorm Warning | BGM | Wayne | 65 min |
| Jun 7, 5:42 PM EDT | Severe Thunderstorm Warning | CTP | Schuylkill | 48 min |
| Jun 7, 6:12 PM EDT | Severe Thunderstorm Warning | BGM | Pike | 63 min |
| Jun 7, 6:15 PM EDT | Severe Thunderstorm Warning | PHI | Carbon | 35 min |
| Jun 7, 6:30 PM EDT | Severe Thunderstorm Warning | CTP | Northumberland | 60 min |
| Jun 7, 6:35 PM EDT | Severe Thunderstorm Warning | CTP | Columbia | 40 min |
| Jun 7, 6:43 PM EDT | Severe Thunderstorm Warning | PHI | Northampton | 32 min |
| Jun 7, 7:10 PM EDT | Severe Thunderstorm Warning | PHI | Northampton | 35 min |
| Jun 7, 7:58 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Lehigh | 32 min |
| Jun 7, 8:09 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 31 min |
| Jun 10, 3:47 PM EDT | Severe Thunderstorm Warning | PBZ | Mercer | 56 min |
| Jun 10, 4:11 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 34 min |
| Jun 10, 4:43 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 47 min |
| Jun 10, 4:55 PM EDT | Severe Thunderstorm Warning | CTP | Potter | 65 min |
| Jun 10, 5:13 PM EDT | Severe Thunderstorm Warning | CLE | Erie | 62 min |
| Jun 10, 5:23 PM EDT | Severe Thunderstorm Warning | CTP | McKean | 67 min |
| Jul 1, 5:14 PM EDT | Severe Thunderstorm Warning | CTP | Bedford | 46 min |
| Jul 1, 5:39 PM EDT | Severe Thunderstorm Warning | CTP | Fulton | 51 min |
| Jul 1, 6:20 PM EDT | Severe Thunderstorm Warning | CTP | Franklin | 55 min |
| Jul 1, 6:33 PM EDT | Tornado Warning | CTP | Lycoming | 37 min |
| Jul 1, 6:45 PM EDT | Severe Thunderstorm Watch | SPC | Armstrong, Butler, Cameron, Clarion, Clearfield, Crawford and 10 more | 6 hr |
| Jul 1, 6:50 PM EDT | Tornado Warning | CTP | Sullivan | 55 min |
| Jul 1, 6:59 PM EDT | Severe Thunderstorm Warning | BGM | Bradford | 66 min |
| Jul 1, 7:41 PM EDT | Tornado Warning | BGM | Bradford | 44 min |
| Jul 1, 9:34 PM EDT | Severe Thunderstorm Warning | PBZ | Butler | 56 min |
| Jul 1, 9:47 PM EDT | Severe Thunderstorm Warning | CTP | Elk, McKean | 58 min |
| Jul 2, 6:00 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, York | 60 min |
| Jul 3, 3:22 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 63 min |
| Jul 3, 4:06 PM EDT | Tornado Warning | CLE | Crawford | 34 min |
| Jul 3, 4:38 PM EDT | Severe Thunderstorm Warning | CLE | Erie | 62 min |
| Jul 3, 5:38 PM EDT | Severe Thunderstorm Warning | CLE | Erie | 47 min |
| Jul 3, 8:45 PM EDT | Severe Thunderstorm Watch | SPC | Wayne | 4 hr |
| Jul 6, 12:45 PM EDT | Severe Thunderstorm Watch | SPC | Bradford, Cameron, Crawford, Elk, Forest, Lycoming and 6 more | 5 hr |
| Jul 6, 3:00 PM EDT | Severe Thunderstorm Watch | SPC | Wayne | 6 hr |
| Jul 6, 3:54 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 66 min |
| Jul 6, 4:47 PM EDT | Severe Thunderstorm Warning | CTP | Warren | 58 min |
| Jul 6, 5:00 PM EDT | Severe Thunderstorm Warning | CTP | McKean, Warren | 60 min |
| Jul 6, 5:02 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 33 min |
| Jul 6, 5:25 PM EDT | Severe Thunderstorm Warning | PBZ | Forest | 57 min |
| Jul 6, 5:48 PM EDT | Severe Thunderstorm Warning | CTP | Potter | 57 min |
| Jul 6, 6:00 PM EDT | Severe Thunderstorm Watch | SPC | Allegheny, Armstrong, Beaver, Bradford, Butler, Cambria and 35 more | 5 hr |
| Jul 6, 6:05 PM EDT | Severe Thunderstorm Warning | CTP | Cameron, Elk | 55 min |
| Jul 6, 6:39 PM EDT | Severe Thunderstorm Warning | CTP | Tioga | 66 min |
| Jul 6, 6:50 PM EDT | Severe Thunderstorm Warning | CTP | Clinton | 85 min |
| Jul 6, 7:00 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Westmoreland | 60 min |
| Jul 6, 7:26 PM EDT | Severe Thunderstorm Warning | BGM | Bradford | 64 min |
| Jul 6, 7:29 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming | 61 min |
| Jul 6, 7:36 PM EDT | Severe Thunderstorm Warning | BGM | Susquehanna | 64 min |
| Jul 6, 7:51 PM EDT | Severe Thunderstorm Warning | CTP | Sullivan | 39 min |
| Jul 6, 8:00 PM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 40 min |
| Jul 6, 8:01 PM EDT | Severe Thunderstorm Warning | BGM | Wayne | 64 min |
| Jul 6, 8:08 PM EDT | Severe Thunderstorm Warning | CTP | Cambria | 67 min |
| Jul 9, 3:47 PM EDT | Severe Thunderstorm Warning | CTP | Elk | 58 min |
| Jul 9, 4:02 PM EDT | Tornado Warning | CTP | Elk | 28 min |
| Jul 9, 4:25 PM EDT | Severe Thunderstorm Warning | CTP | Cameron, Clearfield | 65 min |
| Jul 9, 4:42 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Clinton | 63 min |
| Jul 9, 5:15 PM EDT | Severe Thunderstorm Watch | SPC | Beaver, Butler, Crawford, Erie, Lawrence, Mercer and 1 more | 6 hr |
| Jul 9, 5:35 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Snyder, Union | 55 min |
| Jul 9, 6:07 PM EDT | Severe Thunderstorm Warning | CLE | Erie | 63 min |
| Jul 9, 6:17 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 43 min |
| Jul 9, 6:20 PM EDT | Tornado Warning | CLE | Erie | 65 min |
| Jul 9, 6:31 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 64 min |
| Jul 9, 6:33 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 42 min |
| Jul 9, 6:39 PM EDT | Severe Thunderstorm Warning | CTP | Warren | 66 min |
| Jul 9, 6:45 PM EDT | Severe Thunderstorm Watch | SPC | Armstrong, Bradford, Butler, Cameron, Centre, Clarion and 20 more | 5 hr |
| Jul 9, 6:48 PM EDT | Severe Thunderstorm Warning | PBZ | Mercer | 57 min |
| Jul 9, 6:54 PM EDT | Severe Thunderstorm Warning | PBZ | Venango | 81 min |
| Jul 9, 6:56 PM EDT | Tornado Warning | CTP | Warren | 49 min |
| Jul 9, 7:14 PM EDT | Severe Thunderstorm Warning | PBZ | Lawrence | 61 min |
| Jul 9, 7:17 PM EDT | Severe Thunderstorm Warning | PBZ | Forest | 58 min |
| Jul 9, 7:26 PM EDT | Severe Thunderstorm Warning | CTP | McKean | 64 min |
| Jul 9, 7:28 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver, Butler | 62 min |
| Jul 9, 7:45 PM EDT | Severe Thunderstorm Warning | CTP | Warren | 30 min |
| Jul 9, 7:45 PM EDT | Severe Thunderstorm Warning | PBZ | Mercer | 60 min |
| Jul 9, 7:51 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion | 54 min |
| Jul 9, 8:00 PM EDT | Severe Thunderstorm Warning | CTP | Elk | 40 min |
| Jul 9, 8:00 PM EDT | Severe Thunderstorm Watch | SPC | Allegheny, Bedford, Blair, Cambria, Fayette, Fulton and 6 more | 4 hr |
| Jul 9, 8:02 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong | 58 min |
| Jul 9, 8:06 PM EDT | Severe Thunderstorm Warning | CTP | Potter | 39 min |
| Jul 9, 8:07 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 53 min |
| Jul 9, 8:22 PM EDT | Severe Thunderstorm Warning | PBZ | Jefferson | 53 min |
| Jul 9, 8:24 PM EDT | Severe Thunderstorm Warning | CTP | Cameron, Clearfield | 66 min |
| Jul 9, 8:26 PM EDT | Severe Thunderstorm Warning | PBZ | Butler | 34 min |
| Jul 9, 8:28 PM EDT | Severe Thunderstorm Warning | CTP | Tioga | 62 min |
| Jul 9, 8:39 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana, Westmoreland | 66 min |
| Jul 9, 8:40 PM EDT | Severe Thunderstorm Warning | BGM | Bradford | 65 min |
| Jul 9, 8:47 PM EDT | Severe Thunderstorm Warning | CTP | Cameron, Elk, Potter | 28 min |
| Jul 9, 8:50 PM EDT | Severe Thunderstorm Warning | CTP | Clinton | 70 min |
| Jul 9, 8:50 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 55 min |
| Jul 9, 9:00 PM EDT | Severe Thunderstorm Warning | CTP | Centre | 90 min |
| Jul 9, 9:01 PM EDT | Severe Thunderstorm Warning | CTP | Blair, Cambria | 59 min |
| Jul 9, 9:03 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 42 min |
| Jul 9, 9:22 PM EDT | Tornado Warning | CTP | Cambria, Clearfield | 23 min |
| Jul 9, 9:28 PM EDT | Severe Thunderstorm Warning | CTP | Huntingdon | 77 min |
| Jul 9, 9:30 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming | 75 min |
| Jul 9, 9:34 PM EDT | Severe Thunderstorm Warning | CTP | Tioga | 26 min |
| Jul 9, 9:39 PM EDT | Severe Thunderstorm Warning | CTP | Sullivan | 66 min |
| Jul 9, 9:40 PM EDT | Tornado Warning | CTP | Centre, Huntingdon | 50 min |
| Jul 9, 9:47 PM EDT | Severe Thunderstorm Warning | CTP | Juniata, Mifflin, Snyder, Union | 73 min |
| Jul 9, 9:59 PM EDT | Severe Thunderstorm Warning | BGM | Bradford | 61 min |
| Jul 9, 10:00 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Montour, Northumberland | 75 min |
| Jul 9, 10:00 PM EDT | Severe Thunderstorm Watch | SPC | Adams, Bedford, Berks, Bradford, Carbon, Columbia and 27 more | 5 hr |
| Jul 9, 10:04 PM EDT | Severe Thunderstorm Warning | CTP | Clinton | 16 min |
| Jul 9, 10:10 PM EDT | Severe Thunderstorm Warning | BGM | Susquehanna | 65 min |
| Jul 9, 10:16 PM EDT | Severe Thunderstorm Warning | BGM | Wayne | 64 min |
| Jul 9, 10:19 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Perry | 86 min |
| Jul 9, 10:22 PM EDT | Severe Thunderstorm Warning | BGM | Luzerne, Wyoming | 63 min |
| Jul 9, 10:47 PM EDT | Severe Thunderstorm Warning | BGM | Lackawanna | 48 min |
| Jul 9, 10:50 PM EDT | Severe Thunderstorm Warning | CTP | Lebanon, Schuylkill | 55 min |
| Jul 9, 11:05 PM EDT | Severe Thunderstorm Warning | CTP | Bedford | 40 min |
| Jul 9, 11:14 PM EDT | Severe Thunderstorm Warning | BGM | Susquehanna, Wayne | 46 min |
| Jul 9, 11:26 PM EDT | Severe Thunderstorm Warning | BGM | Pike | 64 min |
| Jul 9, 11:28 PM EDT | Severe Thunderstorm Warning | CTP | Cambria, Somerset | 32 min |
| Jul 17, 3:47 PM EDT | Severe Thunderstorm Warning | CTP | Cambria, Somerset | 43 min |
| Jul 17, 4:15 PM EDT | Severe Thunderstorm Warning | CTP | Huntingdon, Mifflin | 45 min |
| Jul 17, 4:20 PM EDT | Flash Flood Warning | CTP | Somerset | 3 hr |
| Jul 17, 4:32 PM EDT | Severe Thunderstorm Warning | CTP | Potter | 58 min |
| Jul 17, 5:15 PM EDT | Severe Thunderstorm Warning | CTP | Centre | 60 min |
| Jul 17, 5:55 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 65 min |
| Jul 17, 6:32 PM EDT | Severe Thunderstorm Warning | BGM | Wayne | 48 min |
| Jul 17, 7:51 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 49 min |
| Jul 17, 8:27 PM EDT | Severe Thunderstorm Warning | PBZ | Venango | 63 min |
| Jul 18, 5:14 PM EDT | Severe Thunderstorm Warning | BGM | Lackawanna, Susquehanna, Wayne | 46 min |
| Jul 19, 6:33 PM EDT | Severe Thunderstorm Warning | PHI | Delaware, Montgomery | 42 min |
| Jul 19, 6:48 PM EDT | Severe Thunderstorm Warning | PHI | Philadelphia | 47 min |
| Jul 21, 11:09 PM EDT | Severe Thunderstorm Warning | CTP | York | 66 min |
| Jul 22, 4:25 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin | 65 min |
| Jul 22, 5:15 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, York | 60 min |
| Jul 23, 6:00 PM EDT | Severe Thunderstorm Watch | SPC | Crawford, Erie, Lawrence, Mercer, Venango | 6 hr |
| Jul 24, 2:36 PM EDT | Severe Thunderstorm Warning | BGM | Susquehanna | 49 min |
| Jul 24, 3:15 PM EDT | Severe Thunderstorm Watch | SPC | Carbon, Lehigh, Monroe, Northampton, Pike | 6 hr |
| Jul 24, 3:43 PM EDT | Severe Thunderstorm Warning | BGM | Wayne | 47 min |
| Jul 25, 3:06 PM EDT | Severe Thunderstorm Warning | PBZ | Jefferson | 58 min |
| Jul 25, 3:20 PM EDT | Severe Thunderstorm Warning | CTP | Clearfield | 60 min |
| Jul 25, 4:12 PM EDT | Severe Thunderstorm Warning | CTP | Centre | 33 min |
| Jul 28, 9:43 AM EDT | Severe Thunderstorm Warning | PBZ | Lawrence, Mercer | 58 min |
| Jul 28, 10:36 AM EDT | Severe Thunderstorm Warning | PBZ | Lawrence | 54 min |
| Jul 28, 10:40 AM EDT | Flash Flood Warning | PBZ | Mercer | 2 hr |
| Jul 28, 10:46 AM EDT | Flash Flood Warning | PBZ | Lawrence | 3 hr |
| Jul 28, 10:47 AM EDT | Severe Thunderstorm Warning | PBZ | Beaver | 58 min |
| Jul 28, 10:55 AM EDT | Severe Thunderstorm Warning | PBZ | Butler | 65 min |
| Jul 28, 11:00 AM EDT | Severe Thunderstorm Watch | SPC | Allegheny, Armstrong, Beaver, Bedford, Blair, Butler and 11 more | 6 hr |
| Jul 28, 11:30 AM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 60 min |
| Jul 28, 11:55 AM EDT | Severe Thunderstorm Warning | PBZ | Beaver | 50 min |
| Jul 28, 12:17 PM EDT | Severe Thunderstorm Warning | PBZ | Jefferson | 58 min |
| Jul 28, 12:21 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 54 min |
| Jul 28, 12:21 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette | 54 min |
| Jul 28, 12:24 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 51 min |
| Jul 28, 12:27 PM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 63 min |
| Jul 28, 12:28 PM EDT | Severe Thunderstorm Warning | CTP | Elk | 62 min |
| Jul 28, 12:28 PM EDT | Flash Flood Warning | PBZ | Allegheny | 3 hr |
| Jul 28, 12:34 PM EDT | Flash Flood Warning | PBZ | Westmoreland | 2 hr |
| Jul 28, 1:03 PM EDT | Flash Flood Warning | PBZ | Lawrence | 4 hr |
| Jul 28, 1:11 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette | 64 min |
| Jul 28, 1:21 PM EDT | Severe Thunderstorm Warning | CTP | Somerset | 54 min |
| Jul 28, 3:32 PM EDT | Severe Thunderstorm Warning | CTP | McKean | 58 min |
| Jul 28, 8:44 PM EDT | Severe Thunderstorm Warning | PHI | Monroe | 46 min |
| Jul 28, 9:29 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe | 41 min |
| Jul 28, 10:30 PM EDT | Severe Thunderstorm Watch | SPC | Allegheny, Armstrong, Beaver, Butler, Clarion, Crawford and 9 more | 6 hr |
| Jul 28, 11:05 PM EDT | Severe Thunderstorm Warning | CLE | Erie | 60 min |
| Jul 29, 12:31 AM EDT | Severe Thunderstorm Warning | CTP | Warren | 59 min |
| Jul 29, 12:41 AM EDT | Severe Thunderstorm Warning | CTP | Elk, McKean | 64 min |
| Jul 29, 12:41 AM EDT | Severe Thunderstorm Warning | PBZ | Lawrence | 64 min |
| Jul 29, 12:57 AM EDT | Severe Thunderstorm Warning | PBZ | Butler, Lawrence | 63 min |
| Jul 29, 1:16 AM EDT | Flash Flood Warning | PBZ | Lawrence | 3 hr |
| Jul 29, 2:00 AM EDT | Flash Flood Warning | PBZ | Allegheny, Beaver | 3 hr |
| Jul 30, 1:59 PM EDT | Severe Thunderstorm Warning | CTP | Tioga | 61 min |
| Jul 30, 2:57 PM EDT | Severe Thunderstorm Warning | CTP | Tioga | 63 min |
| Jul 30, 3:40 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming | 80 min |
| Jul 30, 3:50 PM EDT | Severe Thunderstorm Warning | CTP | Northumberland | 55 min |
| Jul 30, 3:56 PM EDT | Severe Thunderstorm Warning | CTP | Union | 64 min |
| Jul 30, 4:02 PM EDT | Severe Thunderstorm Warning | CTP | Tioga | 58 min |
| Jul 30, 4:19 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Perry | 71 min |
| Jul 30, 4:31 PM EDT | Severe Thunderstorm Warning | BGM | Bradford | 49 min |
| Jul 30, 4:36 PM EDT | Severe Thunderstorm Warning | CTP | Northumberland, Snyder | 69 min |
| Jul 30, 4:52 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming, Union | 83 min |
| Jul 30, 5:32 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin | 58 min |
| Jul 30, 5:44 PM EDT | Severe Thunderstorm Warning | BGM | Wayne | 61 min |
| Jul 30, 6:00 PM EDT | Severe Thunderstorm Warning | CTP | Snyder, Union | 60 min |
| Jul 30, 6:17 PM EDT | Severe Thunderstorm Warning | CTP | Juniata, Perry | 73 min |
| Jul 30, 6:24 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin | 66 min |
| Jul 30, 7:05 PM EDT | Severe Thunderstorm Warning | CTP | York | 55 min |
| Jul 30, 7:23 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland | 67 min |
| Jul 30, 7:32 PM EDT | Tornado Warning | CTP | York | 28 min |
| Jul 31, 4:15 PM EDT | Severe Thunderstorm Watch | SPC | Crawford, Erie, Forest, McKean, Mercer, Potter and 2 more | 6 hr |
| Jul 31, 5:05 PM EDT | Severe Thunderstorm Warning | CTP | Cambria | 40 min |
| Jul 31, 5:10 PM EDT | Severe Thunderstorm Warning | CTP | Franklin, Fulton | 35 min |
| Jul 31, 5:20 PM EDT | Severe Thunderstorm Warning | CLE | Erie | 65 min |
| Jul 31, 5:31 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 59 min |
| Jul 31, 5:45 PM EDT | Severe Thunderstorm Watch | SPC | Bradford, Lackawanna, Sullivan, Susquehanna, Wayne, Wyoming | 6 hr |
| Jul 31, 6:04 PM EDT | Severe Thunderstorm Warning | PBZ | Mercer | 59 min |
| Jul 31, 6:05 PM EDT | Severe Thunderstorm Warning | CTP | Warren | 70 min |
| Jul 31, 6:14 PM EDT | Severe Thunderstorm Warning | CTP | Blair | 31 min |
| Jul 31, 6:18 PM EDT | Severe Thunderstorm Warning | PBZ | Lawrence | 57 min |
| Jul 31, 6:22 PM EDT | Severe Thunderstorm Warning | CLE | Erie | 63 min |
| Jul 31, 6:22 PM EDT | Severe Thunderstorm Warning | PBZ | Venango | 58 min |
| Jul 31, 6:30 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 65 min |
| Jul 31, 6:33 PM EDT | Severe Thunderstorm Warning | PBZ | Forest | 62 min |
| Jul 31, 6:42 PM EDT | Severe Thunderstorm Warning | CTP | Huntingdon | 33 min |
| Jul 31, 6:55 PM EDT | Severe Thunderstorm Warning | CTP | Elk, McKean | 80 min |
| Jul 31, 6:59 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion | 76 min |
| Jul 31, 7:00 PM EDT | Severe Thunderstorm Warning | PBZ | Mercer | 45 min |
| Jul 31, 7:08 PM EDT | Severe Thunderstorm Warning | PBZ | Butler, Lawrence | 62 min |
| Jul 31, 7:15 PM EDT | Severe Thunderstorm Watch | SPC | Allegheny, Armstrong, Beaver, Blair, Butler, Cambria and 24 more | 5 hr |
| Jul 31, 7:37 PM EDT | Severe Thunderstorm Warning | PBZ | Jefferson | 53 min |
| Jul 31, 7:38 PM EDT | Severe Thunderstorm Warning | CTP | Cameron, Potter | 82 min |
| Jul 31, 7:39 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver | 61 min |
| Jul 31, 7:41 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong | 64 min |
| Jul 31, 8:05 PM EDT | Severe Thunderstorm Warning | PBZ | Butler, Lawrence | 60 min |
| Jul 31, 8:07 PM EDT | Severe Thunderstorm Warning | CTP | Clearfield, Elk | 53 min |
| Jul 31, 8:18 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming, Tioga | 42 min |
| Jul 31, 8:40 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 65 min |
| Jul 31, 8:49 PM EDT | Severe Thunderstorm Warning | CTP | Clinton, Potter | 41 min |
| Jul 31, 9:00 PM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 60 min |
| Jul 31, 9:28 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana | 62 min |
| Jul 31, 9:48 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver | 57 min |
| Aug 1, 1:22 AM EDT | Severe Thunderstorm Warning | CTP | Franklin, Fulton | 38 min |
| Aug 4, 10:47 PM EDT | Severe Thunderstorm Warning | CLE | Erie | 63 min |
| Aug 13, 4:00 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana | 60 min |
| Aug 13, 4:22 PM EDT | Severe Thunderstorm Warning | CTP | Clearfield | 53 min |
| Aug 13, 4:26 PM EDT | Severe Thunderstorm Warning | CTP | Cambria | 64 min |
| Aug 13, 4:34 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Clinton | 86 min |
| Aug 13, 4:55 PM EDT | Severe Thunderstorm Warning | CTP | Blair | 65 min |
| Aug 13, 4:56 PM EDT | Tornado Warning | CTP | Cambria | 34 min |
| Aug 13, 5:15 PM EDT | Severe Thunderstorm Watch | SPC | Fayette, Greene, Somerset, Washington, Westmoreland | 5 hr |
| Aug 13, 5:18 PM EDT | Severe Thunderstorm Warning | CTP | Huntingdon | 57 min |
| Aug 13, 5:39 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming, Union | 66 min |
| Aug 13, 6:04 PM EDT | Severe Thunderstorm Warning | PBZ | Greene, Washington | 56 min |
| Aug 13, 6:28 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Westmoreland | 62 min |
| Aug 13, 8:08 PM EDT | Severe Thunderstorm Warning | CTP | Huntingdon, Juniata, Northumberland, Perry, Snyder | 67 min |
| Aug 13, 8:08 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland, Dauphin | 67 min |
| Aug 13, 8:08 PM EDT | Severe Thunderstorm Warning | CTP | Schuylkill | 67 min |
| Aug 13, 8:15 PM EDT | Severe Thunderstorm Watch | SPC | Adams, Berks, Bucks, Carbon, Chester, Columbia and 19 more | 4 hr |
| Aug 13, 8:43 PM EDT | Severe Thunderstorm Warning | BGM | Luzerne | 32 min |
| Aug 13, 8:54 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe | 46 min |
| Aug 13, 9:42 PM EDT | Severe Thunderstorm Warning | PHI | Carbon | 33 min |
| Aug 13, 9:54 PM EDT | Severe Thunderstorm Warning | PHI | Monroe, Northampton | 61 min |
| Aug 13, 10:14 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, Lebanon | 61 min |
| Aug 13, 10:27 PM EDT | Severe Thunderstorm Warning | CTP | Schuylkill | 63 min |
| Aug 13, 10:29 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 61 min |
| Aug 13, 11:30 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 60 min |
| Aug 14, 2:14 AM EDT | Flash Flood Warning | PHI | Bucks | 3 hr |
| Aug 14, 1:49 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, York | 56 min |
| Aug 14, 2:00 PM EDT | Severe Thunderstorm Watch | SPC | Berks, Bucks, Chester, Delaware, Lancaster, Lehigh and 4 more | |
| Aug 14, 2:41 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 64 min |
| Aug 14, 2:45 PM EDT | Severe Thunderstorm Warning | CTP | York | 30 min |
| Aug 14, 3:33 PM EDT | Severe Thunderstorm Warning | CTP | Tioga | 57 min |
| Aug 14, 3:50 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 55 min |
| Aug 14, 3:56 PM EDT | Severe Thunderstorm Warning | CTP | Perry | 64 min |
| Aug 14, 4:54 PM EDT | Severe Thunderstorm Warning | PHI | Delaware, Philadelphia | 46 min |
| Aug 14, 5:09 PM EDT | Severe Thunderstorm Warning | CTP | Clinton | 66 min |
| Aug 14, 5:19 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 51 min |
| Aug 14, 6:25 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Montour | 65 min |
| Aug 14, 7:11 PM EDT | Severe Thunderstorm Warning | BGM | Luzerne | 64 min |
| Aug 20, 10:18 AM EDT | Flash Flood Warning | CTP | Northumberland, Snyder, Union | 4 hr |
| Aug 20, 10:18 AM EDT | Flash Flood Warning | CTP | Montour | 4 hr |
| Aug 20, 11:25 AM EDT | Flash Flood Warning | CTP | Juniata | 3 hr |
| Aug 20, 2:03 PM EDT | Flash Flood Warning | CTP | McKean | 4 hr |
| Aug 20, 2:05 PM EDT | Flash Flood Warning | CTP | Juniata, Northumberland, Snyder | 3 hr |
| Aug 20, 2:05 PM EDT | Flash Flood Warning | CTP | Montour | 3 hr |
| Aug 20, 2:05 PM EDT | Flash Flood Warning | CTP | Union | 3 hr |
| Aug 20, 2:09 PM EDT | Flash Flood Warning | CTP | McKean | 66 min |
| Aug 20, 2:09 PM EDT | Severe Thunderstorm Warning | CTP | McKean | 66 min |
| Aug 20, 3:33 PM EDT | Severe Thunderstorm Warning | CTP | Clearfield, Elk | 57 min |
| Aug 20, 5:15 PM EDT | Flash Flood Warning | CTP | Juniata, Snyder | 5 hr |
| Aug 20, 5:15 PM EDT | Flash Flood Warning | CTP | Union | 5 hr |
| Aug 20, 5:33 PM EDT | Flash Flood Warning | PBZ | Forest | 4 hr |
| Aug 20, 5:50 PM EDT | Flash Flood Warning | CTP | McKean | 4 hr |
| Aug 24, 4:49 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 56 min |
| Aug 26, 4:44 PM EDT | Severe Thunderstorm Warning | CTP | York | 61 min |
| Aug 26, 5:41 PM EDT | Severe Thunderstorm Warning | CTP | York | 49 min |
| Aug 26, 5:49 PM EDT | Flash Flood Warning | CTP | York | 3 hr |
| Aug 26, 6:23 PM EDT | Severe Thunderstorm Warning | CTP | Juniata, Mifflin | 67 min |
| Aug 26, 6:24 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 66 min |
| Aug 26, 10:46 PM EDT | Flash Flood Warning | CTP | Juniata, Perry | 3 hr |
| Aug 26, 11:00 PM EDT | Flash Flood Warning | PHI | Chester | 4 hr |
| Aug 27, 4:07 PM EDT | Severe Thunderstorm Warning | CTP | Franklin | 68 min |
| Aug 27, 5:09 PM EDT | Flash Flood Warning | CTP | Bedford | 3 hr |
| Sep 5, 11:34 PM EDT | Flash Flood Warning | PHI | Chester | 14 hr |
| Sep 6, 2:37 PM EDT | Severe Thunderstorm Warning | CTP | Cambria | 53 min |
| Sep 6, 2:45 PM EDT | Severe Thunderstorm Warning | CTP | Bedford | 60 min |
| Sep 6, 3:01 PM EDT | Flash Flood Warning | CTP | Franklin, Fulton | 3 hr |
| Sep 6, 3:01 PM EDT | Flash Flood Warning | CTP | Bedford, Cambria, Somerset | 3 hr |
| Sep 6, 3:27 PM EDT | Severe Thunderstorm Warning | CTP | Cambria | 48 min |
| Sep 6, 3:56 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, York | 64 min |
| Sep 6, 4:17 PM EDT | Flash Flood Warning | CTP | Lancaster, York | 3 hr |
| Sep 6, 4:32 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Perry | 58 min |
| Sep 6, 9:07 PM EDT | Flash Flood Warning | CTP | Cumberland, Dauphin, Perry, York | 3 hr |
| Sep 6, 11:37 PM EDT | Flash Flood Warning | CTP | Lycoming, Snyder, Union | 3 hr |
| Sep 6, 11:47 PM EDT | Flash Flood Warning | CTP | Cumberland, Dauphin, York | 3 hr |
| Sep 6, 11:47 PM EDT | Flash Flood Warning | CTP | Perry | 3 hr |
| Sep 7, 2:06 AM EDT | Flash Flood Warning | CTP | Northumberland | 3 hr |
| Sep 7, 2:25 AM EDT | Flash Flood Warning | CTP | Perry, Snyder, Union | 4 hr |
| Sep 7, 2:25 AM EDT | Flash Flood Warning | CTP | Dauphin, York | 4 hr |
| Sep 7, 2:25 AM EDT | Flash Flood Warning | CTP | Lycoming | 4 hr |
| Sep 7, 3:45 AM EDT | Flash Flood Warning | CTP | Tioga | 2 hr |
| Sep 7, 4:10 AM EDT | Flash Flood Warning | PHI | Berks | 3 hr |
| Sep 9, 4:01 PM EDT | Severe Thunderstorm Warning | PBZ | Venango | 59 min |
| Sep 9, 4:38 PM EDT | Severe Thunderstorm Warning | PBZ | Forest | 52 min |
| Sep 9, 5:08 PM EDT | Severe Thunderstorm Warning | CTP | McKean, Warren | 67 min |
| Sep 9, 5:09 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 51 min |
| Sep 9, 5:54 PM EDT | Flash Flood Warning | CTP | Lancaster | 3 hr |
| Sep 9, 6:01 PM EDT | Tornado Warning | CTP | McKean | 29 min |
| Sep 9, 6:10 PM EDT | Flash Flood Warning | CTP | York | 3 hr |
| Sep 9, 7:17 PM EDT | Flash Flood Warning | PHI | Monroe, Northampton | 3 hr |
| Sep 9, 7:17 PM EDT | Flash Flood Warning | PHI | Berks | 3 hr |
| Sep 9, 8:58 PM EDT | Flash Flood Warning | CTP | Lancaster, York | 3 hr |
| Sep 9, 10:45 PM EDT | Flash Flood Warning | CTP | Union | 3 hr |
| Sep 16, 8:37 AM EDT | Flash Flood Warning | PHI | Chester, Delaware, Philadelphia | 4 hr |
| Sep 16, 9:00 AM EDT | Flash Flood Warning | CTP | Dauphin, Lebanon, Schuylkill | 6 hr |
| Sep 16, 9:00 AM EDT | Flash Flood Warning | CTP | Lancaster, York | 6 hr |
| Sep 16, 9:00 AM EDT | Flash Flood Warning | CTP | Adams, Cumberland, Perry | 6 hr |
| Sep 16, 9:25 AM EDT | Flash Flood Warning | PHI | Bucks, Montgomery | 6 hr |
| Sep 16, 11:25 AM EDT | Flash Flood Warning | PHI | Delaware, Philadelphia | 6 hr |
| Sep 16, 11:25 AM EDT | Flash Flood Warning | PHI | Chester | 6 hr |
| Sep 16, 12:11 PM EDT | Flash Flood Warning | PHI | Berks, Lehigh | 5 hr |
| Sep 16, 12:11 PM EDT | Flash Flood Warning | PHI | Northampton | 5 hr |
| Sep 16, 2:15 PM EDT | Flash Flood Warning | CTP | Adams, Cumberland, Dauphin, Lancaster, York | 7 hr |
| Sep 16, 2:15 PM EDT | Flash Flood Warning | CTP | Perry | 7 hr |
| Sep 16, 2:15 PM EDT | Flash Flood Warning | CTP | Lebanon, Schuylkill | 7 hr |
| Sep 16, 2:41 PM EDT | Flash Flood Warning | PHI | Bucks, Chester, Delaware, Montgomery, Philadelphia | 6 hr |
| Sep 16, 3:21 PM EDT | Flash Flood Warning | PHI | Carbon, Monroe | 6 hr |
| Sep 16, 4:21 PM EDT | Flash Flood Warning | PHI | Northampton | 5 hr |
| Sep 16, 4:21 PM EDT | Flash Flood Warning | PHI | Berks, Lehigh | 5 hr |
| Sep 16, 4:35 PM EDT | Flash Flood Warning | CTP | Columbia, Lycoming, Montour, Northumberland, Union | 3 hr |
| Sep 16, 4:35 PM EDT | Flash Flood Warning | CTP | Snyder | 3 hr |
| Sep 16, 5:15 PM EDT | Flash Flood Warning | BGM | Lackawanna, Luzerne | 5 hr |
| Sep 16, 5:15 PM EDT | Flash Flood Warning | BGM | Pike, Wayne | 5 hr |
| Sep 16, 7:30 PM EDT | Flash Flood Warning | CTP | Snyder, Union | 90 min |
| Sep 16, 9:59 PM EDT | Flash Flood Warning | BGM | Pike | 6 hr |
| Sep 16, 9:59 PM EDT | Flash Flood Warning | BGM | Lackawanna, Luzerne, Wayne | 6 hr |
| Sep 29, 3:18 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 57 min |
| Sep 29, 3:35 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 55 min |
| Sep 29, 3:45 PM EDT | Tornado Watch | SPC | Allegheny, Armstrong, Beaver, Bedford, Blair, Butler and 20 more | 6 hr |
| Sep 29, 4:06 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver | 54 min |
| Sep 29, 4:20 PM EDT | Severe Thunderstorm Warning | PBZ | Butler | 55 min |
| Sep 29, 4:29 PM EDT | Severe Thunderstorm Warning | PBZ | Lawrence | 61 min |
| Sep 29, 4:49 PM EDT | Severe Thunderstorm Warning | CLE | Crawford, Erie | 61 min |
| Sep 29, 4:51 PM EDT | Severe Thunderstorm Warning | PBZ | Mercer | 54 min |
| Sep 29, 4:57 PM EDT | Severe Thunderstorm Warning | PBZ | Venango | 63 min |
| Sep 29, 5:13 PM EDT | Severe Thunderstorm Warning | CTP | Warren | 62 min |
| Sep 29, 6:02 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong | 58 min |
| Sep 29, 10:06 PM EDT | Severe Thunderstorm Warning | CTP | Blair, Cambria, Centre, Clearfield | 54 min |
| Sep 29, 10:06 PM EDT | Severe Thunderstorm Warning | CTP | Cameron | 54 min |
| Sep 29, 10:27 PM EDT | Severe Thunderstorm Warning | CTP | Clinton, Potter | 78 min |
| Sep 29, 11:43 PM EDT | Severe Thunderstorm Warning | CTP | Clinton | 47 min |
| Sep 29, 11:46 PM EDT | Severe Thunderstorm Warning | CTP | Clinton | 44 min |
| Sep 30, 12:09 AM EDT | Severe Thunderstorm Warning | CTP | Juniata, Snyder | 51 min |
| Sep 30, 12:09 AM EDT | Severe Thunderstorm Warning | CTP | Juniata, Snyder | 66 min |
| Sep 30, 12:35 AM EDT | Severe Thunderstorm Warning | CTP | Cumberland, Dauphin | 40 min |
| Sep 30, 1:01 AM EDT | Severe Thunderstorm Warning | CTP | Columbia, Lycoming, Sullivan | 59 min |
| Sep 30, 1:01 AM EDT | Severe Thunderstorm Warning | CTP | Montour, Northumberland | 59 min |
| Sep 30, 1:02 AM EDT | Severe Thunderstorm Warning | CTP | Lebanon, Schuylkill | 43 min |
| Sep 30, 1:25 AM EDT | Flash Flood Warning | CTP | Snyder, Union | 3 hr |
| Oct 13, 3:45 PM EDT | Severe Thunderstorm Watch | SPC | Allegheny, Armstrong, Beaver, Butler, Clarion, Crawford and 11 more | 6 hr |
| Oct 13, 4:39 PM EDT | Severe Thunderstorm Warning | CLE | Erie | 66 min |
| Oct 13, 5:02 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 63 min |
| Oct 13, 5:45 PM EDT | Severe Thunderstorm Warning | CLE | Erie | 65 min |
| Oct 13, 5:52 PM EDT | Severe Thunderstorm Warning | PBZ | Mercer | 58 min |
| Oct 13, 6:00 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 60 min |
| Oct 13, 6:04 PM EDT | Severe Thunderstorm Warning | PBZ | Lawrence | 56 min |
| Oct 13, 6:15 PM EDT | Severe Thunderstorm Warning | PBZ | Venango | 65 min |
| Oct 13, 6:18 PM EDT | Severe Thunderstorm Warning | CTP | Warren | 72 min |
| Oct 13, 6:19 PM EDT | Severe Thunderstorm Warning | CTP | McKean | 41 min |
| Oct 13, 6:36 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver | 64 min |
| Oct 13, 6:40 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Butler, Mercer | 60 min |
| Oct 13, 6:42 PM EDT | Severe Thunderstorm Warning | CTP | Elk | 33 min |
| Oct 13, 6:45 PM EDT | Severe Thunderstorm Watch | SPC | Adams, Bedford, Blair, Bradford, Cambria, Cameron and 31 more | 6 hr |
| Oct 13, 7:03 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 57 min |
| Oct 13, 7:05 PM EDT | Severe Thunderstorm Warning | CTP | Elk, McKean | 55 min |
| Oct 13, 7:11 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 59 min |
| Oct 13, 7:14 PM EDT | Severe Thunderstorm Warning | CTP | Cameron | 61 min |
| Oct 13, 7:20 PM EDT | Tornado Warning | CTP | Cameron | 25 min |
| Oct 13, 7:26 PM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 64 min |
| Oct 13, 7:29 PM EDT | Severe Thunderstorm Warning | CTP | Potter | 61 min |
| Oct 13, 7:42 PM EDT | Tornado Warning | CTP | Potter | 33 min |
| Oct 13, 7:47 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana | 63 min |
| Oct 13, 7:52 PM EDT | Severe Thunderstorm Warning | CTP | Clearfield | 53 min |
| Oct 13, 8:10 PM EDT | Severe Thunderstorm Warning | CTP | Cambria, Somerset | 80 min |
| Oct 13, 8:15 PM EDT | Severe Thunderstorm Warning | CTP | Cameron | 60 min |
| Oct 13, 8:30 PM EDT | Severe Thunderstorm Warning | CTP | Clinton, Potter | 75 min |
| Oct 13, 8:30 PM EDT | Severe Thunderstorm Warning | CTP | Centre | 75 min |
| Oct 13, 8:43 PM EDT | Severe Thunderstorm Warning | CTP | Blair, Huntingdon | 62 min |
| Oct 13, 8:47 PM EDT | Severe Thunderstorm Warning | CTP | Tioga | 43 min |
| Oct 13, 9:08 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming | 82 min |
| Oct 13, 9:25 PM EDT | Severe Thunderstorm Warning | CTP | Juniata, Mifflin, Snyder, Union | 50 min |
| Oct 13, 9:25 PM EDT | Severe Thunderstorm Warning | CTP | Perry | 50 min |
| Nov 2, 3:43 PM EST | Severe Thunderstorm Warning | PBZ | Fayette, Westmoreland | 57 min |
| Nov 2, 4:27 PM EST | Severe Thunderstorm Warning | PBZ | Armstrong, Indiana | 63 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 | 390 |
| Tornado Warning | 15 |
| Severe Thunderstorm Watch | 29 |
| Tornado Watch | 1 |
| Flooding | |
| Flash Flood Warning | 133 |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- York County32
- Union County31
- Lancaster County30
- Lycoming County30
- Allegheny County28
- Snyder County27
- Westmoreland County27
- McKean County27
- Lawrence County26
- Mercer County25
- Northumberland County24
- Crawford County24
- Cambria County23
- Huntingdon County22
- Juniata County22
- Tioga County22
- Centre County21
- Perry County21
- Elk County21
- Dauphin County20
- Butler County20
- Clearfield County20
- Clinton County20
- Washington County20
- Warren County20
- Columbia County19
- Beaver County19
- Potter County19
- Erie County19
- Berks County18
- Montour County18
- Somerset County18
- Venango County18
- Bradford County18
- Cameron County18
- Wayne County18
- Northampton County17
- Bucks County17
- Lehigh County16
- Mifflin County16
27 more counties
- Bedford County16
- Cumberland County16
- Schuylkill County16
- Monroe County16
- Lebanon County15
- Luzerne County15
- Armstrong County15
- Fayette County15
- Chester County14
- Sullivan County14
- Carbon County14
- Philadelphia County14
- Indiana County14
- Susquehanna County14
- Forest County14
- Franklin County13
- Blair County13
- Lackawanna County13
- Montgomery County12
- Delaware County12
- Greene County12
- Wyoming County12
- Fulton County11
- Clarion County11
- Jefferson County11
- Adams County10
- Pike County10
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive19982000
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.