Alert archive / Pennsylvania / Severe Thunderstorm Warnings
Severe Thunderstorm Warnings in Pennsylvania, 2019
787 severe thunderstorm warnings in 2019. 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 2019. Tap one for its archive.
- Severe Thunderstorm Warnings
- 787
- Busiest month
- May243 severe thunderstorm warnings
- Busiest day
- May 29, 201975 severe thunderstorm warnings
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
568 of 787 severe thunderstorm warnings covering Pennsylvania in 2019 had a qualifying storm report inside them; 1,341 of 1,609 hail, wind and damage reports fell inside a warning, on average 22 minutes after it went out.
Pennsylvania, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Severe thunderstorm warnings | 787 | 568 | 28% | 1,609 | 83% | 22 min |
Each office's whole area, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Cleveland, OH: severe thunderstorm warnings | 227 | 134 | 41% | 475 | 75% | 24 min |
| NWS Pittsburgh, PA: severe thunderstorm warnings | 311 | 231 | 26% | 611 | 82% | 19 min |
| NWS Binghamton, NY: severe thunderstorm warnings | 205 | 139 | 32% | 462 | 85% | 23 min |
| NWS Philadelphia/Mount Holly: severe thunderstorm warnings | 410 | 276 | 33% | 1,175 | 87% | 25 min |
| NWS State College, PA: severe thunderstorm warnings | 284 | 177 | 38% | 468 | 81% | 22 min |
An office's figures cover every county it serves, including across state lines.
Verified by the Iowa Environmental Mesonet's Cow, which matches each storm-based warning with the local storm reports inside its polygon while it was in force, within 15 km of its edge: a tornado warning counts as verified on a tornado report, a severe thunderstorm warning on hail of 1 inch or more, a gust of 58 mph or more, or wind damage, a flash flood warning on a flash flood report. The false alarm ratio is the share of warnings with no such report; "inside a warning" is the probability of detection, the share of reports that fell inside one; lead time runs from the warning's issue to each report inside it, counting zero for a report that came first. A warning with no report is not proof nothing happened: reports come from spotters, the public and damage surveys, and are thin where few people live.
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 8, 4:12 PM EST | Severe Thunderstorm Warning | CLE | Crawford | 48 min |
| Jan 8, 4:36 PM EST | Severe Thunderstorm Warning | PBZ | Clarion, Forest, Jefferson | 25 min |
| Jan 8, 5:28 PM EST | Severe Thunderstorm Warning | PBZ | Clarion, Forest, Jefferson | 32 min |
| Mar 14, 8:58 PM EDT | Severe Thunderstorm Warning | PBZ | Lawrence, Mercer | 47 min |
| Mar 15, 7:05 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 25 min |
| Mar 15, 7:09 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester, Montgomery | 51 min |
| Mar 15, 7:23 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 52 min |
| Mar 15, 7:32 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Chester, Montgomery | 43 min |
| Apr 14, 6:31 PM EDT | Severe Thunderstorm Warning | PBZ | Mercer, Venango | 44 min |
| Apr 14, 6:42 PM EDT | Severe Thunderstorm Warning | CLE | Crawford, Erie | 78 min |
| Apr 14, 6:43 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Lawrence, Mercer | 47 min |
| Apr 14, 6:59 PM EDT | Severe Thunderstorm Warning | PBZ | Butler, Lawrence, Mercer, Venango | 46 min |
| Apr 14, 7:06 PM EDT | Severe Thunderstorm Warning | CTP | Adams, York | 54 min |
| Apr 14, 7:15 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Butler, Washington | 34 min |
| Apr 14, 7:45 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Beaver, Butler, Clarion, Lawrence, Mercer and 1 more | 30 min |
| Apr 14, 7:46 PM EDT | Severe Thunderstorm Warning | PBZ | Butler, Clarion, Forest, Mercer, Venango | 44 min |
| Apr 14, 7:52 PM EDT | Severe Thunderstorm Warning | CTP | Warren | 53 min |
| Apr 14, 8:00 PM EDT | Severe Thunderstorm Warning | PBZ | Forest, Venango | 30 min |
| Apr 14, 8:29 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion, Forest, Jefferson, Venango | 61 min |
| Apr 14, 8:41 PM EDT | Severe Thunderstorm Warning | CTP | Elk, McKean, Warren | 64 min |
| Apr 14, 9:34 PM EDT | Severe Thunderstorm Warning | CTP | Cameron, Elk, McKean, Potter | 56 min |
| Apr 14, 9:44 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana | 31 min |
| Apr 14, 10:03 PM EDT | Severe Thunderstorm Warning | CTP | Cambria, Clearfield | 42 min |
| Apr 14, 10:17 PM EDT | Severe Thunderstorm Warning | CTP | Bedford, Blair, Cambria, Fulton, Somerset | 43 min |
| Apr 14, 10:42 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Clearfield | 48 min |
| Apr 14, 10:50 PM EDT | Severe Thunderstorm Warning | CTP | Potter, Tioga | 55 min |
| Apr 14, 10:58 PM EDT | Severe Thunderstorm Warning | CTP | Bedford, Blair, Centre, Franklin, Fulton, Huntingdon and 1 more | 47 min |
| Apr 14, 11:12 PM EDT | Severe Thunderstorm Warning | BGM | Bradford | 63 min |
| Apr 14, 11:34 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Clinton, Huntingdon, Juniata, Lycoming, Mifflin and 2 more | 86 min |
| Apr 14, 11:41 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland, Franklin, Huntingdon, Juniata, Perry | 49 min |
| Apr 14, 11:46 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming, Tioga | 59 min |
| Apr 15, 12:16 AM EDT | Severe Thunderstorm Warning | BGM | Bradford, Susquehanna | 59 min |
| Apr 15, 12:41 AM EDT | Severe Thunderstorm Warning | CTP | Columbia, Lycoming, Montour, Northumberland, Sullivan | 52 min |
| Apr 15, 1:03 AM EDT | Severe Thunderstorm Warning | BGM | Lackawanna, Luzerne, Wyoming | 57 min |
| Apr 15, 1:10 AM EDT | Severe Thunderstorm Warning | BGM | Bradford, Susquehanna | 65 min |
| Apr 15, 1:28 AM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe | 47 min |
| Apr 15, 1:48 AM EDT | Severe Thunderstorm Warning | BGM | Lackawanna, Luzerne, Pike, Wayne, Wyoming | 57 min |
| Apr 15, 1:59 AM EDT | Severe Thunderstorm Warning | BGM | Susquehanna, Wayne | 61 min |
| Apr 15, 2:46 AM EDT | Severe Thunderstorm Warning | PHI | Delaware | 44 min |
| Apr 15, 3:03 AM EDT | Severe Thunderstorm Warning | PHI | Bucks, Lehigh, Montgomery, Northampton | 20 min |
| Apr 15, 3:27 AM EDT | Severe Thunderstorm Warning | PHI | Bucks, Chester, Montgomery | 32 min |
| Apr 15, 3:39 AM EDT | Severe Thunderstorm Warning | PHI | Bucks, Philadelphia | 37 min |
| Apr 19, 6:19 PM EDT | Severe Thunderstorm Warning | CTP | Franklin, Fulton | 56 min |
| Apr 19, 7:07 PM EDT | Severe Thunderstorm Warning | CTP | Franklin | 34 min |
| Apr 19, 7:12 PM EDT | Severe Thunderstorm Warning | CTP | Huntingdon | 31 min |
| Apr 19, 7:35 PM EDT | Severe Thunderstorm Warning | CTP | Juniata, Mifflin | 56 min |
| Apr 19, 8:11 PM EDT | Severe Thunderstorm Warning | CTP | Adams, Franklin | 49 min |
| Apr 19, 8:34 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland, Franklin | 41 min |
| Apr 19, 9:11 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Perry | 34 min |
| Apr 19, 9:36 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Dauphin, Montour, Northumberland, Snyder | 54 min |
| Apr 20, 5:09 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Washington, Westmoreland | 18 min |
| Apr 20, 6:38 PM EDT | Severe Thunderstorm Warning | PBZ | Butler, Lawrence | 15 min |
| Apr 23, 8:40 PM EDT | Severe Thunderstorm Warning | CTP | Blair, Cambria, Clearfield | 35 min |
| Apr 23, 8:53 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland, York | 22 min |
| Apr 26, 2:51 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland, Franklin, Juniata, Perry | 54 min |
| Apr 26, 2:54 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin | 29 min |
| Apr 26, 3:20 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, York | 70 min |
| Apr 26, 3:45 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Juniata, Lebanon, Northumberland, Perry, Schuylkill | 64 min |
| Apr 26, 4:19 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester | 56 min |
| Apr 26, 4:28 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 47 min |
| Apr 26, 4:53 PM EDT | Severe Thunderstorm Warning | PHI | Delaware | 52 min |
| Apr 26, 5:17 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery | 43 min |
| Apr 26, 5:28 PM EDT | Severe Thunderstorm Warning | PHI | Montgomery, Philadelphia | 47 min |
| Apr 26, 5:44 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 61 min |
| May 3, 6:23 PM EDT | Severe Thunderstorm Warning | CTP | Mifflin | 52 min |
| May 3, 6:51 PM EDT | Severe Thunderstorm Warning | CTP | Huntingdon | 39 min |
| May 18, 1:45 AM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Greene | 30 min |
| May 18, 2:15 AM EDT | Severe Thunderstorm Warning | PBZ | Fayette | 30 min |
| May 18, 6:44 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 31 min |
| May 18, 7:12 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Washington | 33 min |
| May 18, 7:44 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Butler | 17 min |
| May 19, 2:23 PM EDT | Severe Thunderstorm Warning | CTP | Blair, Huntingdon | 37 min |
| May 19, 2:27 PM EDT | Severe Thunderstorm Warning | CTP | Franklin, Fulton | 48 min |
| May 19, 2:42 PM EDT | Severe Thunderstorm Warning | CTP | Franklin | 48 min |
| May 19, 3:07 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Huntingdon, Mifflin | 38 min |
| May 19, 3:10 PM EDT | Severe Thunderstorm Warning | CTP | Tioga | 65 min |
| May 19, 3:23 PM EDT | Severe Thunderstorm Warning | CTP | Franklin | 52 min |
| May 19, 3:42 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Mifflin | 48 min |
| May 19, 3:44 PM EDT | Severe Thunderstorm Warning | CTP | Franklin, Juniata, Perry | 46 min |
| May 19, 3:45 PM EDT | Severe Thunderstorm Warning | BGM | Bradford | 60 min |
| May 19, 4:00 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming | 45 min |
| May 19, 4:07 PM EDT | Severe Thunderstorm Warning | CTP | Franklin | 23 min |
| May 19, 4:13 PM EDT | Severe Thunderstorm Warning | CTP | Mifflin, Snyder, Union | 47 min |
| May 19, 4:23 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland, Perry | 52 min |
| May 19, 4:35 PM EDT | Severe Thunderstorm Warning | CTP | Franklin | 40 min |
| May 19, 4:46 PM EDT | Severe Thunderstorm Warning | BGM | Bradford | 36 min |
| May 19, 4:55 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming, Sullivan | 35 min |
| May 19, 4:56 PM EDT | Severe Thunderstorm Warning | CTP | Northumberland, Snyder, Union | 49 min |
| May 19, 5:07 PM EDT | Severe Thunderstorm Warning | CTP | Adams, Cumberland, Franklin | 53 min |
| May 19, 5:16 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Lebanon | 29 min |
| May 19, 5:27 PM EDT | Severe Thunderstorm Warning | CTP | Sullivan | 33 min |
| May 19, 5:31 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Westmoreland | 44 min |
| May 19, 5:37 PM EDT | Severe Thunderstorm Warning | BGM | Bradford, Susquehanna, Wyoming | 38 min |
| May 19, 5:45 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland, Franklin, Huntingdon, Juniata, Mifflin, Perry | 30 min |
| May 19, 5:47 PM EDT | Severe Thunderstorm Warning | CTP | Lebanon, Schuylkill | 58 min |
| May 19, 6:09 PM EDT | Severe Thunderstorm Warning | BGM | Lackawanna, Luzerne, Pike, Wayne, Wyoming | 66 min |
| May 19, 6:10 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Lancaster, Lebanon, York | 35 min |
| May 19, 6:20 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Lehigh | 40 min |
| May 19, 6:23 PM EDT | Severe Thunderstorm Warning | CTP | Centre | 32 min |
| May 19, 6:55 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe | 65 min |
| May 19, 7:11 PM EDT | Severe Thunderstorm Warning | CTP | Cambria, Clearfield | 49 min |
| May 19, 7:22 PM EDT | Severe Thunderstorm Warning | BGM | Pike | 53 min |
| May 19, 7:24 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 51 min |
| May 19, 7:32 PM EDT | Severe Thunderstorm Warning | CTP | York | 43 min |
| May 19, 7:43 PM EDT | Severe Thunderstorm Warning | BGM | Luzerne | 47 min |
| May 19, 7:52 PM EDT | Severe Thunderstorm Warning | BGM | Bradford, Luzerne, Wyoming | 38 min |
| May 19, 7:53 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Clinton | 52 min |
| May 19, 7:57 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 48 min |
| May 19, 8:05 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, Lebanon, York | 40 min |
| May 19, 8:25 PM EDT | Severe Thunderstorm Warning | BGM | Lackawanna, Luzerne, Susquehanna, Wyoming | 36 min |
| May 19, 8:37 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Lehigh, Montgomery | 38 min |
| May 19, 8:44 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 46 min |
| May 19, 9:09 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Chester, Lehigh, Montgomery, Northampton | 51 min |
| May 19, 9:46 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Chester, Montgomery, Northampton | 44 min |
| May 19, 10:27 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 48 min |
| May 19, 10:33 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Lebanon, Schuylkill | 42 min |
| May 19, 11:00 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Carbon, Lehigh, Monroe, Northampton | 60 min |
| May 19, 11:41 PM EDT | Severe Thunderstorm Warning | PHI | Northampton | 53 min |
| May 19, 11:54 PM EDT | Severe Thunderstorm Warning | PHI | Lehigh, Northampton | 39 min |
| May 23, 9:15 AM EDT | Severe Thunderstorm Warning | CLE | Crawford, Erie | 45 min |
| May 23, 9:37 AM EDT | Severe Thunderstorm Warning | CTP | Warren | 53 min |
| May 23, 6:46 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion, Forest, Jefferson, Venango | 44 min |
| May 23, 7:38 PM EDT | Severe Thunderstorm Warning | PBZ | Jefferson | 22 min |
| May 23, 7:50 PM EDT | Severe Thunderstorm Warning | CTP | Clearfield | 55 min |
| May 23, 8:17 PM EDT | Severe Thunderstorm Warning | BGM | Wayne | 58 min |
| May 23, 8:23 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Indiana, Westmoreland | 52 min |
| May 23, 8:39 PM EDT | Severe Thunderstorm Warning | BGM | Lackawanna, Pike, Susquehanna, Wayne | 51 min |
| May 23, 8:52 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Huntingdon, Mifflin, Snyder | 53 min |
| May 23, 8:58 PM EDT | Severe Thunderstorm Warning | CTP | Cambria, Somerset | 32 min |
| May 23, 9:15 PM EDT | Severe Thunderstorm Warning | CTP | Columbia | 30 min |
| May 23, 9:26 PM EDT | Severe Thunderstorm Warning | CTP | Juniata, Perry | 34 min |
| May 23, 9:30 PM EDT | Severe Thunderstorm Warning | CTP | Bedford, Cambria, Somerset | 45 min |
| May 23, 9:37 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe | 23 min |
| May 23, 10:05 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland, Dauphin, Juniata, Mifflin, Perry | 55 min |
| May 23, 10:12 PM EDT | Severe Thunderstorm Warning | CTP | Lebanon | 35 min |
| May 23, 10:15 PM EDT | Severe Thunderstorm Warning | CTP | Bedford, Fulton | 30 min |
| May 23, 10:23 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, York | 55 min |
| May 23, 10:35 PM EDT | Severe Thunderstorm Warning | CTP | Franklin | 22 min |
| May 23, 10:38 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 35 min |
| May 23, 10:47 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester | 43 min |
| May 23, 11:22 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 38 min |
| May 23, 11:35 PM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 11 min |
| May 23, 11:42 PM EDT | Severe Thunderstorm Warning | CTP | Somerset | 33 min |
| May 23, 11:59 PM EDT | Severe Thunderstorm Warning | CTP | Adams, Cumberland, York | 61 min |
| May 25, 2:24 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Westmoreland | 51 min |
| May 25, 6:06 PM EDT | Severe Thunderstorm Warning | CLE | Crawford, Erie | 54 min |
| May 25, 6:14 PM EDT | Severe Thunderstorm Warning | PBZ | Greene | 46 min |
| May 25, 6:17 PM EDT | Severe Thunderstorm Warning | PBZ | Mercer, Venango | 43 min |
| May 25, 6:24 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver | 36 min |
| May 25, 6:37 PM EDT | Severe Thunderstorm Warning | PBZ | Forest, Venango | 38 min |
| May 25, 6:55 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Butler, Lawrence, Washington | 50 min |
| May 25, 6:58 PM EDT | Severe Thunderstorm Warning | PBZ | Forest, Mercer, Venango | 47 min |
| May 25, 7:31 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Armstrong, Butler, Indiana, Westmoreland | 44 min |
| May 25, 7:33 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion, Forest, Jefferson | 28 min |
| May 25, 7:38 PM EDT | Severe Thunderstorm Warning | CTP | Elk | 52 min |
| May 25, 8:09 PM EDT | Severe Thunderstorm Warning | CTP | McKean, Potter | 51 min |
| May 25, 8:11 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Indiana, Westmoreland | 34 min |
| May 25, 8:21 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Greene | 24 min |
| May 25, 8:37 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana, Westmoreland | 38 min |
| May 25, 8:45 PM EDT | Severe Thunderstorm Warning | CTP | Cambria | 45 min |
| May 25, 8:50 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Westmoreland | 25 min |
| May 26, 1:23 PM EDT | Severe Thunderstorm Warning | CTP | Juniata, Snyder | 22 min |
| May 26, 4:31 PM EDT | Severe Thunderstorm Warning | CTP | Lebanon | 29 min |
| May 26, 4:55 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, Lebanon | 35 min |
| May 26, 5:25 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 30 min |
| May 28, 2:15 PM EDT | Severe Thunderstorm Warning | PBZ | Mercer, Venango | 45 min |
| May 28, 2:28 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Butler, Lawrence | 47 min |
| May 28, 2:41 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming, Potter, Tioga | 34 min |
| May 28, 2:54 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Butler, Clarion, Venango | 51 min |
| May 28, 2:59 PM EDT | Severe Thunderstorm Warning | CTP | Clinton, Lycoming, Potter | 46 min |
| May 28, 2:59 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Indiana | 46 min |
| May 28, 3:01 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Butler | 44 min |
| May 28, 3:18 PM EDT | Severe Thunderstorm Warning | CTP | Blair, Cambria, Clearfield, Huntingdon | 57 min |
| May 28, 3:28 PM EDT | Severe Thunderstorm Warning | CTP | Northumberland, Snyder, Union | 62 min |
| May 28, 3:30 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Clarion, Indiana, Jefferson | 30 min |
| May 28, 3:36 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver, Butler, Lawrence | 39 min |
| May 28, 3:40 PM EDT | Severe Thunderstorm Warning | CTP | Bedford, Blair, Cambria | 65 min |
| May 28, 3:41 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Butler, Clarion, Mercer, Venango | 49 min |
| May 28, 3:43 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion, Forest, Venango | 47 min |
| May 28, 3:47 PM EDT | Severe Thunderstorm Warning | CTP | Clinton, Lycoming, Northumberland, Union | 43 min |
| May 28, 3:50 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Indiana | 40 min |
| May 28, 4:08 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Clinton, Northumberland, Snyder, Union | 52 min |
| May 28, 4:27 PM EDT | Severe Thunderstorm Warning | CTP | Huntingdon | 33 min |
| May 28, 4:27 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 63 min |
| May 28, 4:28 PM EDT | Severe Thunderstorm Warning | CTP | Montour, Northumberland, Union | 32 min |
| May 28, 4:28 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Butler, Clarion, Indiana, Jefferson | 47 min |
| May 28, 4:32 PM EDT | Severe Thunderstorm Warning | PBZ | Butler, Lawrence, Mercer | 43 min |
| May 28, 4:36 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion, Forest, Jefferson | 39 min |
| May 28, 4:37 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana | 19 min |
| May 28, 4:41 PM EDT | Severe Thunderstorm Warning | CTP | Clinton | 34 min |
| May 28, 4:42 PM EDT | Severe Thunderstorm Warning | BGM | Bradford, Susquehanna, Wyoming | 48 min |
| May 28, 4:45 PM EDT | Severe Thunderstorm Warning | CTP | Bedford, Blair | 60 min |
| May 28, 4:45 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Indiana, Westmoreland | 45 min |
| May 28, 4:49 PM EDT | Severe Thunderstorm Warning | CTP | Juniata, Mifflin | 31 min |
| May 28, 4:50 PM EDT | Severe Thunderstorm Warning | CTP | Cambria | 55 min |
| May 28, 4:54 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Dauphin, Northumberland, Schuylkill, Snyder | 51 min |
| May 28, 4:59 PM EDT | Severe Thunderstorm Warning | CTP | Lebanon | 29 min |
| May 28, 5:00 PM EDT | Severe Thunderstorm Warning | CTP | Clinton, Lycoming, Northumberland, Union | 45 min |
| May 28, 5:04 PM EDT | Severe Thunderstorm Warning | CTP | Snyder, Union | 26 min |
| May 28, 5:08 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 67 min |
| May 28, 5:12 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver, Butler, Lawrence | 33 min |
| May 28, 5:19 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana | 41 min |
| May 28, 5:25 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Montour, Northumberland, Union | 50 min |
| May 28, 5:26 PM EDT | Severe Thunderstorm Warning | CTP | Schuylkill | 34 min |
| May 28, 5:26 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Lancaster, Lebanon | 49 min |
| May 28, 5:28 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana, Jefferson | 32 min |
| May 28, 5:29 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Armstrong, Beaver, Butler, Indiana, Westmoreland | 46 min |
| May 28, 5:36 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 39 min |
| May 28, 5:38 PM EDT | Severe Thunderstorm Warning | BGM | Bradford, Lackawanna, Luzerne, Susquehanna, Wyoming | 37 min |
| May 28, 5:45 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester | 45 min |
| May 28, 5:49 PM EDT | Severe Thunderstorm Warning | CTP | Bedford, Blair, Cambria | 56 min |
| May 28, 5:56 PM EDT | Severe Thunderstorm Warning | BGM | Bradford, Luzerne, Wyoming | 64 min |
| May 28, 5:58 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 32 min |
| May 28, 6:05 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Schuylkill | 40 min |
| May 28, 6:11 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 64 min |
| May 28, 6:12 PM EDT | Severe Thunderstorm Warning | CTP | Sullivan | 48 min |
| May 28, 6:15 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Armstrong, Butler, Indiana, Westmoreland | 45 min |
| May 28, 6:16 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Lehigh, Montgomery | 44 min |
| May 28, 6:18 PM EDT | Severe Thunderstorm Warning | BGM | Lackawanna, Luzerne, Susquehanna, Wayne, Wyoming | 57 min |
| May 28, 6:24 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester, Delaware | 48 min |
| May 28, 6:28 PM EDT | Severe Thunderstorm Warning | CTP | Franklin, Huntingdon | 25 min |
| May 28, 6:31 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 13 min |
| May 28, 6:41 PM EDT | Severe Thunderstorm Warning | PHI | Monroe | 64 min |
| May 28, 6:52 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 38 min |
| May 28, 6:58 PM EDT | Severe Thunderstorm Warning | BGM | Lackawanna, Luzerne, Wyoming | 62 min |
| May 28, 7:04 PM EDT | Severe Thunderstorm Warning | BGM | Pike | 41 min |
| May 28, 7:42 PM EDT | Severe Thunderstorm Warning | PHI | Monroe | 63 min |
| May 28, 7:53 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver, Butler, Lawrence | 37 min |
| May 28, 10:07 PM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 23 min |
| May 28, 10:12 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Westmoreland | 33 min |
| May 28, 10:37 PM EDT | Severe Thunderstorm Warning | CTP | Cambria, Somerset | 26 min |
| May 28, 10:50 PM EDT | Severe Thunderstorm Warning | CTP | Bedford | 34 min |
| May 29, 1:00 AM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Westmoreland | 45 min |
| May 29, 12:39 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Greene | 36 min |
| May 29, 12:57 PM EDT | Severe Thunderstorm Warning | CTP | Cameron, Elk, McKean | 48 min |
| May 29, 1:27 PM EDT | Severe Thunderstorm Warning | CTP | Blair, Cambria, Huntingdon | 33 min |
| May 29, 1:41 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Clinton | 34 min |
| May 29, 1:41 PM EDT | Severe Thunderstorm Warning | CTP | Cameron, Clinton, Elk, Potter | 49 min |
| May 29, 1:52 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Armstrong, Beaver, Butler, Westmoreland | 53 min |
| May 29, 1:54 PM EDT | Severe Thunderstorm Warning | CTP | Tioga | 51 min |
| May 29, 2:00 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming, Potter, Tioga | 45 min |
| May 29, 2:05 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Washington, Westmoreland | 40 min |
| May 29, 2:09 PM EDT | Severe Thunderstorm Warning | CTP | Clinton, Lycoming, Northumberland, Union | 51 min |
| May 29, 2:14 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Indiana, Jefferson, Westmoreland | 46 min |
| May 29, 2:20 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Indiana, Westmoreland | 40 min |
| May 29, 2:26 PM EDT | Severe Thunderstorm Warning | CTP | Cameron, Centre, Clearfield, Clinton, Elk, Lycoming | 49 min |
| May 29, 2:30 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Lehigh, Montgomery, Northampton | 60 min |
| May 29, 2:32 PM EDT | Severe Thunderstorm Warning | CTP | Cambria, Clearfield | 58 min |
| May 29, 2:38 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Northumberland, Schuylkill | 52 min |
| May 29, 2:41 PM EDT | Severe Thunderstorm Warning | BGM | Luzerne | 49 min |
| May 29, 2:43 PM EDT | Severe Thunderstorm Warning | CTP | Blair, Huntingdon | 47 min |
| May 29, 2:43 PM EDT | Severe Thunderstorm Warning | CTP | Columbia | 32 min |
| May 29, 2:45 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Montour | 60 min |
| May 29, 2:47 PM EDT | Severe Thunderstorm Warning | CTP | Juniata, Mifflin, Snyder | 43 min |
| May 29, 2:51 PM EDT | Severe Thunderstorm Warning | BGM | Lackawanna, Luzerne | 24 min |
| May 29, 2:55 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Fayette, Washington, Westmoreland | 50 min |
| May 29, 2:56 PM EDT | Severe Thunderstorm Warning | CTP | Adams, Cumberland, Franklin, York | 51 min |
| May 29, 2:59 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe | 46 min |
| May 29, 3:02 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Washington | 28 min |
| May 29, 3:02 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana | 16 min |
| May 29, 3:10 PM EDT | Severe Thunderstorm Warning | CTP | Blair, Cambria, Centre, Clearfield, Huntingdon | 39 min |
| May 29, 3:10 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Lehigh, Northampton | 65 min |
| May 29, 3:11 PM EDT | Severe Thunderstorm Warning | CTP | Columbia | 34 min |
| May 29, 3:16 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Clinton, Lycoming, Sullivan | 44 min |
| May 29, 3:19 PM EDT | Severe Thunderstorm Warning | CTP | Huntingdon, Mifflin | 26 min |
| May 29, 3:26 PM EDT | Severe Thunderstorm Warning | CTP | Schuylkill | 19 min |
| May 29, 3:29 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe, Northampton | 46 min |
| May 29, 3:29 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Lehigh, Monroe, Northampton | 46 min |
| May 29, 3:30 PM EDT | Severe Thunderstorm Warning | CTP | Blair, Centre, Huntingdon, Mifflin | 60 min |
| May 29, 3:31 PM EDT | Severe Thunderstorm Warning | CTP | Lebanon | 29 min |
| May 29, 3:32 PM EDT | Severe Thunderstorm Warning | BGM | Luzerne | 33 min |
| May 29, 3:33 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Indiana, Westmoreland | 42 min |
| May 29, 3:37 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Fayette, Washington, Westmoreland | 38 min |
| May 29, 3:40 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Lycoming, Montour, Northumberland, Sullivan, Union | 35 min |
| May 29, 3:41 PM EDT | Severe Thunderstorm Warning | CTP | Cambria, Somerset | 49 min |
| May 29, 3:43 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Lehigh | 62 min |
| May 29, 3:43 PM EDT | Severe Thunderstorm Warning | PHI | Monroe, Northampton | 47 min |
| May 29, 3:47 PM EDT | Severe Thunderstorm Warning | CTP | Juniata, Perry | 58 min |
| May 29, 3:53 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Lebanon, Schuylkill | 37 min |
| May 29, 3:53 PM EDT | Severe Thunderstorm Warning | CTP | Juniata, Mifflin, Perry, Snyder | 32 min |
| May 29, 4:04 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 41 min |
| May 29, 4:06 PM EDT | Severe Thunderstorm Warning | CTP | Bedford | 39 min |
| May 29, 4:06 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Montour, Northumberland, Schuylkill, Union | 39 min |
| May 29, 4:09 PM EDT | Severe Thunderstorm Warning | PHI | Monroe, Northampton | 51 min |
| May 29, 4:13 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Westmoreland | 24 min |
| May 29, 4:13 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Lehigh, Northampton | 47 min |
| May 29, 4:16 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Lehigh, Monroe, Northampton | 27 min |
| May 29, 4:18 PM EDT | Severe Thunderstorm Warning | BGM | Lackawanna, Luzerne, Pike, Wayne | 42 min |
| May 29, 4:18 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Chester, Lehigh, Montgomery, Northampton | 42 min |
| May 29, 4:24 PM EDT | Severe Thunderstorm Warning | CTP | Somerset | 36 min |
| May 29, 4:29 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Dauphin, Lebanon, Northumberland, Schuylkill | 61 min |
| May 29, 4:30 PM EDT | Severe Thunderstorm Warning | CTP | Franklin, Fulton, Huntingdon | 45 min |
| May 29, 4:36 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland, Dauphin, Lancaster, Lebanon, Perry, York | 54 min |
| May 29, 4:42 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Lehigh, Monroe, Northampton | 48 min |
| May 29, 4:50 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Carbon, Chester, Lehigh, Montgomery, Northampton | 40 min |
| May 29, 4:53 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery | 67 min |
| May 29, 4:58 PM EDT | Severe Thunderstorm Warning | CTP | Adams, Cumberland, Franklin, Juniata, Perry, York | 47 min |
| May 29, 5:23 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Chester, Lehigh, Monroe, Montgomery and 1 more | 34 min |
| May 29, 5:39 PM EDT | Severe Thunderstorm Warning | CTP | Adams, Cumberland, Dauphin, Lancaster, Lebanon, York | 66 min |
| May 29, 5:39 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 66 min |
| May 29, 5:49 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester, Delaware, Montgomery, Philadelphia | 41 min |
| May 29, 6:06 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery, Philadelphia | 24 min |
| May 29, 6:22 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 53 min |
| May 30, 4:36 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 39 min |
| May 30, 4:40 PM EDT | Severe Thunderstorm Warning | PHI | Northampton | 50 min |
| May 30, 4:48 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Northampton | 42 min |
| May 30, 5:20 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 40 min |
| Jun 1, 3:40 PM EDT | Severe Thunderstorm Warning | CTP | Potter | 50 min |
| Jun 1, 4:29 PM EDT | Severe Thunderstorm Warning | PBZ | Forest | 32 min |
| Jun 1, 4:32 PM EDT | Severe Thunderstorm Warning | CTP | Warren | 28 min |
| Jun 1, 4:37 PM EDT | Severe Thunderstorm Warning | PBZ | Mercer | 38 min |
| Jun 1, 4:54 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 51 min |
| Jun 1, 5:04 PM EDT | Severe Thunderstorm Warning | CTP | Elk | 26 min |
| Jun 1, 5:22 PM EDT | Severe Thunderstorm Warning | PBZ | Mercer | 38 min |
| Jun 1, 5:24 PM EDT | Severe Thunderstorm Warning | CLE | Crawford, Erie | 66 min |
| Jun 1, 5:31 PM EDT | Severe Thunderstorm Warning | BGM | Bradford | 44 min |
| Jun 1, 5:39 PM EDT | Severe Thunderstorm Warning | CTP | Tioga | 66 min |
| Jun 1, 6:12 PM EDT | Severe Thunderstorm Warning | BGM | Bradford | 30 min |
| Jun 1, 6:51 PM EDT | Severe Thunderstorm Warning | PBZ | Mercer, Venango | 24 min |
| Jun 2, 2:40 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 50 min |
| Jun 2, 3:18 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 42 min |
| Jun 2, 3:21 PM EDT | Severe Thunderstorm Warning | PHI | Philadelphia | 39 min |
| Jun 2, 3:53 PM EDT | Severe Thunderstorm Warning | CTP | Franklin | 65 min |
| Jun 2, 4:48 PM EDT | Severe Thunderstorm Warning | CTP | Adams | 27 min |
| Jun 2, 5:46 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 44 min |
| Jun 2, 5:55 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 51 min |
| Jun 2, 6:43 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Philadelphia | 47 min |
| Jun 2, 7:11 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Chester, Montgomery | 49 min |
| Jun 13, 3:20 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver | 25 min |
| Jun 16, 5:39 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 36 min |
| Jun 19, 9:36 PM EDT | Severe Thunderstorm Warning | CTP | Bedford, Fulton | 54 min |
| Jun 20, 2:33 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 57 min |
| Jun 24, 6:25 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Butler, Washington | 50 min |
| Jun 24, 6:58 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Armstrong, Beaver, Butler, Lawrence | 47 min |
| Jun 24, 7:44 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Butler, Clarion, Venango | 46 min |
| Jun 26, 2:36 PM EDT | Severe Thunderstorm Warning | PBZ | Greene | 24 min |
| Jun 26, 3:07 PM EDT | Severe Thunderstorm Warning | PBZ | Greene, Washington | 38 min |
| Jun 26, 3:42 PM EDT | Severe Thunderstorm Warning | PBZ | Greene | 33 min |
| Jun 26, 3:55 PM EDT | Severe Thunderstorm Warning | CTP | Clinton, Lycoming, Snyder, Union | 80 min |
| Jun 26, 5:37 PM EDT | Severe Thunderstorm Warning | CTP | Northumberland, Schuylkill | 53 min |
| Jun 26, 6:45 PM EDT | Severe Thunderstorm Warning | BGM | Susquehanna, Wayne | 45 min |
| Jun 27, 2:52 PM EDT | Severe Thunderstorm Warning | CTP | Bedford, Fulton | 53 min |
| Jun 27, 3:28 PM EDT | Severe Thunderstorm Warning | CTP | Bedford | 24 min |
| Jun 27, 4:15 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 45 min |
| Jun 27, 4:35 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Washington | 25 min |
| Jun 27, 5:32 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Indiana | 28 min |
| Jun 27, 6:17 PM EDT | Severe Thunderstorm Warning | PBZ | Lawrence | 43 min |
| Jun 28, 4:04 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, York | 41 min |
| Jun 28, 5:01 PM EDT | Severe Thunderstorm Warning | PHI | Lehigh, Northampton | 44 min |
| Jun 28, 5:06 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Montgomery | 39 min |
| Jun 28, 5:27 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Lehigh, Montgomery, Northampton | 48 min |
| Jun 28, 5:42 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester, Montgomery | 48 min |
| Jun 28, 6:50 PM EDT | Severe Thunderstorm Warning | PHI | Delaware, Montgomery, Philadelphia | 40 min |
| Jun 28, 7:17 PM EDT | Severe Thunderstorm Warning | PHI | Delaware, Philadelphia | 43 min |
| Jun 28, 7:22 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 23 min |
| Jun 28, 7:26 PM EDT | Severe Thunderstorm Warning | PBZ | Lawrence | 34 min |
| Jun 28, 8:10 PM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 35 min |
| Jun 28, 8:19 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 26 min |
| Jun 28, 9:01 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 29 min |
| Jun 29, 1:51 AM EDT | Severe Thunderstorm Warning | CLE | Crawford | 39 min |
| Jun 29, 2:29 AM EDT | Severe Thunderstorm Warning | CLE | Crawford | 51 min |
| Jun 29, 11:38 AM EDT | Severe Thunderstorm Warning | CTP | Centre, Clearfield | 37 min |
| Jun 29, 12:07 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver, Butler, Lawrence | 38 min |
| Jun 29, 12:20 PM EDT | Severe Thunderstorm Warning | CTP | Centre | 40 min |
| Jun 29, 12:28 PM EDT | Severe Thunderstorm Warning | CTP | Clinton, Lycoming | 42 min |
| Jun 29, 12:40 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Butler | 35 min |
| Jun 29, 12:45 PM EDT | Severe Thunderstorm Warning | CTP | Juniata, Mifflin, Snyder, Union | 45 min |
| Jun 29, 12:59 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland, Franklin, Huntingdon, Juniata, Perry | 61 min |
| Jun 29, 1:10 PM EDT | Severe Thunderstorm Warning | CTP | Juniata, Perry | 65 min |
| Jun 29, 2:01 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Dauphin, Montour, Northumberland, Schuylkill | 44 min |
| Jun 29, 2:19 PM EDT | Severe Thunderstorm Warning | CTP | Adams, Cumberland, York | 41 min |
| Jun 29, 2:26 PM EDT | Severe Thunderstorm Warning | CTP | Franklin, Fulton | 64 min |
| Jun 29, 2:27 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 63 min |
| Jun 29, 2:45 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Lancaster, Lebanon | 60 min |
| Jun 29, 3:09 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 51 min |
| Jun 29, 3:12 PM EDT | Severe Thunderstorm Warning | BGM | Bradford, Susquehanna | 63 min |
| Jun 29, 3:15 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, York | 60 min |
| Jun 29, 3:20 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Chester, Lehigh, Montgomery, Northampton | 55 min |
| Jun 29, 3:24 PM EDT | Severe Thunderstorm Warning | PHI | Delaware | 36 min |
| Jun 29, 3:27 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 53 min |
| Jun 29, 3:47 PM EDT | Severe Thunderstorm Warning | BGM | Wayne | 58 min |
| Jun 29, 3:49 PM EDT | Severe Thunderstorm Warning | CTP | Bedford, Fulton | 36 min |
| Jun 29, 3:52 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 53 min |
| Jun 29, 3:56 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery | 49 min |
| Jun 29, 3:59 PM EDT | Severe Thunderstorm Warning | PBZ | Butler | 20 min |
| Jun 29, 3:59 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 46 min |
| Jun 29, 4:04 PM EDT | Severe Thunderstorm Warning | BGM | Lackawanna, Wayne | 56 min |
| Jun 29, 4:05 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming, Tioga | 55 min |
| Jun 29, 4:17 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion, Jefferson | 28 min |
| Jun 29, 4:28 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Delaware, Montgomery, Philadelphia | 47 min |
| Jun 29, 4:36 PM EDT | Severe Thunderstorm Warning | BGM | Lackawanna | 54 min |
| Jun 29, 4:59 PM EDT | Severe Thunderstorm Warning | CTP | Clinton, Lycoming, Montour, Northumberland, Union | 61 min |
| Jun 29, 5:01 PM EDT | Severe Thunderstorm Warning | CTP | Clearfield | 59 min |
| Jun 29, 5:16 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Butler | 14 min |
| Jun 29, 6:04 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Montour, Northumberland, Snyder, Union | 56 min |
| Jun 29, 6:45 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Lebanon, Northumberland, Schuylkill, Snyder | 60 min |
| Jun 29, 7:41 PM EDT | Severe Thunderstorm Warning | BGM | Bradford, Susquehanna | 37 min |
| Jun 29, 7:53 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 26 min |
| Jun 29, 7:55 PM EDT | Severe Thunderstorm Warning | BGM | Susquehanna | 65 min |
| Jun 29, 7:59 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 16 min |
| Jun 29, 8:00 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 15 min |
| Jun 29, 8:16 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 29 min |
| Jun 29, 8:25 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 16 min |
| Jun 29, 8:41 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 31 min |
| Jun 29, 8:43 PM EDT | Severe Thunderstorm Warning | BGM | Susquehanna, Wayne | 35 min |
| Jun 29, 9:17 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Greene, Washington | 43 min |
| Jun 29, 9:42 PM EDT | Severe Thunderstorm Warning | PBZ | Greene | 37 min |
| Jun 29, 10:18 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette | 42 min |
| Jul 2, 2:54 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong | 36 min |
| Jul 2, 3:32 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Indiana | 43 min |
| Jul 2, 3:56 PM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 34 min |
| Jul 2, 4:18 PM EDT | Severe Thunderstorm Warning | CTP | Bedford, Blair, Cambria, Somerset | 57 min |
| Jul 2, 4:18 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Butler | 27 min |
| Jul 2, 4:21 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Westmoreland | 24 min |
| Jul 2, 4:23 PM EDT | Severe Thunderstorm Warning | CTP | Huntingdon | 52 min |
| Jul 2, 4:41 PM EDT | Severe Thunderstorm Warning | CTP | Schuylkill | 34 min |
| Jul 2, 4:45 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Montour, Northumberland | 60 min |
| Jul 2, 4:45 PM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 30 min |
| Jul 2, 5:17 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 43 min |
| Jul 2, 5:35 PM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 25 min |
| Jul 2, 5:43 PM EDT | Severe Thunderstorm Warning | CTP | York | 62 min |
| Jul 2, 6:03 PM EDT | Severe Thunderstorm Warning | CTP | Adams | 47 min |
| Jul 2, 6:24 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver, Washington | 51 min |
| Jul 2, 6:27 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, York | 78 min |
| Jul 2, 6:28 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 47 min |
| Jul 2, 7:12 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester, Delaware, Montgomery, Philadelphia | 48 min |
| Jul 2, 7:14 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver, Washington | 46 min |
| Jul 2, 7:27 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 48 min |
| Jul 2, 7:38 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 52 min |
| Jul 2, 7:50 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 40 min |
| Jul 2, 8:10 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 50 min |
| Jul 2, 8:48 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette | 27 min |
| Jul 6, 2:38 PM EDT | Severe Thunderstorm Warning | CTP | Clearfield, Elk | 37 min |
| Jul 6, 2:59 PM EDT | Severe Thunderstorm Warning | CTP | Clearfield | 61 min |
| Jul 6, 3:04 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Butler, Lawrence | 41 min |
| Jul 6, 3:14 PM EDT | Severe Thunderstorm Warning | CTP | Cameron, Clearfield, Elk | 46 min |
| Jul 6, 3:18 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Washington | 42 min |
| Jul 6, 3:43 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Clearfield, Clinton | 62 min |
| Jul 6, 3:43 PM EDT | Severe Thunderstorm Warning | PHI | Northampton | 47 min |
| Jul 6, 4:01 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Washington | 29 min |
| Jul 6, 4:03 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming, Sullivan | 72 min |
| Jul 6, 4:08 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Armstrong, Indiana, Westmoreland | 52 min |
| Jul 6, 4:14 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Washington | 25 min |
| Jul 6, 4:28 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 21 min |
| Jul 6, 4:30 PM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 45 min |
| Jul 6, 4:33 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Fayette, Washington, Westmoreland | 42 min |
| Jul 6, 4:40 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Lycoming, Montour, Northumberland, Snyder, Union | 95 min |
| Jul 6, 4:41 PM EDT | Severe Thunderstorm Warning | PHI | Monroe, Northampton | 49 min |
| Jul 6, 4:42 PM EDT | Severe Thunderstorm Warning | CTP | Cambria, Somerset | 63 min |
| Jul 6, 4:46 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland, Franklin, Huntingdon | 29 min |
| Jul 6, 4:56 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Washington, Westmoreland | 49 min |
| Jul 6, 5:04 PM EDT | Severe Thunderstorm Warning | PHI | Delaware | 17 min |
| Jul 6, 5:18 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Greene, Washington | 42 min |
| Jul 6, 5:25 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 50 min |
| Jul 6, 5:34 PM EDT | Severe Thunderstorm Warning | CTP | Adams, Cumberland, Dauphin, Lebanon, York | 71 min |
| Jul 6, 5:39 PM EDT | Severe Thunderstorm Warning | CTP | Schuylkill | 66 min |
| Jul 6, 5:54 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland, Franklin, Fulton, Huntingdon | 66 min |
| Jul 6, 6:13 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery, Philadelphia | 15 min |
| Jul 6, 6:22 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Carbon, Lehigh, Monroe, Northampton | 38 min |
| Jul 6, 6:26 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, Lebanon, York | 79 min |
| Jul 6, 6:42 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Philadelphia | 30 min |
| Jul 6, 6:44 PM EDT | Severe Thunderstorm Warning | CTP | Adams, Cumberland, Franklin, Fulton, York | 76 min |
| Jul 6, 6:53 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Chester, Lehigh, Monroe, Montgomery and 1 more | 67 min |
| Jul 11, 1:44 PM EDT | Severe Thunderstorm Warning | PHI | Delaware, Montgomery, Philadelphia | 61 min |
| Jul 11, 3:04 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver, Lawrence | 26 min |
| Jul 11, 3:27 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Butler | 33 min |
| Jul 11, 3:38 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 43 min |
| Jul 11, 4:51 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 39 min |
| Jul 11, 4:59 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 46 min |
| Jul 11, 5:38 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 13 min |
| Jul 11, 6:14 PM EDT | Severe Thunderstorm Warning | PHI | Delaware, Montgomery, Philadelphia | 61 min |
| Jul 16, 5:26 PM EDT | Severe Thunderstorm Warning | BGM | Bradford, Susquehanna | 26 min |
| Jul 16, 10:10 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver, Lawrence | 50 min |
| Jul 16, 10:47 PM EDT | Severe Thunderstorm Warning | PBZ | Butler, Lawrence, Mercer | 43 min |
| Jul 17, 2:00 PM EDT | Severe Thunderstorm Warning | CTP | Bedford, Fulton, Huntingdon | 45 min |
| Jul 17, 5:16 PM EDT | Severe Thunderstorm Warning | CTP | Adams, York | 89 min |
| Jul 17, 6:12 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Lancaster, Lebanon | 78 min |
| Jul 17, 6:35 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 40 min |
| Jul 17, 6:51 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester, Montgomery | 54 min |
| Jul 17, 7:15 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery | 45 min |
| Jul 17, 8:15 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Delaware, Montgomery, Philadelphia | 45 min |
| Jul 19, 4:00 PM EDT | Severe Thunderstorm Warning | BGM | Bradford | 45 min |
| Jul 19, 4:47 PM EDT | Severe Thunderstorm Warning | BGM | Susquehanna | 58 min |
| Jul 19, 5:10 PM EDT | Severe Thunderstorm Warning | CTP | McKean, Warren | 65 min |
| Jul 19, 5:33 PM EDT | Severe Thunderstorm Warning | BGM | Bradford | 57 min |
| Jul 19, 5:39 PM EDT | Severe Thunderstorm Warning | BGM | Susquehanna, Wayne | 50 min |
| Jul 19, 5:42 PM EDT | Severe Thunderstorm Warning | CTP | Tioga | 63 min |
| Jul 19, 5:47 PM EDT | Severe Thunderstorm Warning | CTP | Elk | 73 min |
| Jul 19, 6:07 PM EDT | Severe Thunderstorm Warning | BGM | Bradford, Susquehanna, Wyoming | 38 min |
| Jul 19, 6:29 PM EDT | Severe Thunderstorm Warning | BGM | Bradford | 46 min |
| Jul 19, 6:48 PM EDT | Severe Thunderstorm Warning | CTP | Cameron, Clearfield, Clinton, Elk | 57 min |
| Jul 19, 7:20 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 40 min |
| Jul 19, 7:36 PM EDT | Severe Thunderstorm Warning | PBZ | Forest, Venango | 24 min |
| Jul 19, 8:00 PM EDT | Severe Thunderstorm Warning | PBZ | Venango | 45 min |
| Jul 19, 8:14 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion, Forest, Jefferson | 31 min |
| Jul 19, 11:05 PM EDT | Severe Thunderstorm Warning | PBZ | Venango | 13 min |
| Jul 20, 7:58 AM EDT | Severe Thunderstorm Warning | PBZ | Lawrence, Mercer | 32 min |
| Jul 20, 8:23 AM EDT | Severe Thunderstorm Warning | PBZ | Beaver, Butler, Lawrence | 37 min |
| Jul 20, 7:23 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Westmoreland | 40 min |
| Jul 20, 9:46 PM EDT | Severe Thunderstorm Warning | CLE | Crawford, Erie | 59 min |
| Jul 20, 9:56 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion, Forest, Venango | 49 min |
| Jul 20, 10:20 PM EDT | Severe Thunderstorm Warning | CLE | Erie | 37 min |
| Jul 20, 10:25 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion, Forest, Jefferson | 39 min |
| Jul 21, 1:58 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Washington | 17 min |
| Jul 21, 2:17 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 28 min |
| Jul 21, 3:45 PM EDT | Severe Thunderstorm Warning | BGM | Lackawanna, Luzerne, Wyoming | 60 min |
| Jul 21, 4:19 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Butler | 26 min |
| Jul 21, 4:46 PM EDT | Severe Thunderstorm Warning | BGM | Lackawanna, Pike, Wayne | 33 min |
| Jul 21, 4:49 PM EDT | Severe Thunderstorm Warning | BGM | Luzerne | 56 min |
| Jul 21, 4:56 PM EDT | Severe Thunderstorm Warning | PHI | Monroe | 37 min |
| Jul 21, 5:12 PM EDT | Severe Thunderstorm Warning | CTP | Franklin, Fulton | 53 min |
| Jul 21, 6:00 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Clearfield | 25 min |
| Jul 21, 6:04 PM EDT | Severe Thunderstorm Warning | CTP | York | 56 min |
| Jul 21, 6:14 PM EDT | Severe Thunderstorm Warning | PBZ | Mercer | 31 min |
| Jul 21, 6:50 PM EDT | Severe Thunderstorm Warning | PHI | Lehigh, Northampton | 29 min |
| Jul 21, 6:54 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette | 36 min |
| Jul 21, 7:26 PM EDT | Severe Thunderstorm Warning | CTP | Adams, York | 64 min |
| Jul 21, 8:37 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, York | 68 min |
| Jul 21, 8:41 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Washington | 34 min |
| Jul 21, 8:43 PM EDT | Severe Thunderstorm Warning | CTP | Bedford | 62 min |
| Jul 21, 8:44 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Carbon, Lehigh, Monroe, Northampton | 46 min |
| Jul 21, 9:24 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Lehigh, Northampton | 51 min |
| Jul 21, 9:30 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 45 min |
| Jul 21, 10:14 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Lehigh, Montgomery, Northampton | 46 min |
| Jul 21, 10:35 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Lehigh | 40 min |
| Jul 21, 10:42 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester, Montgomery | 48 min |
| Jul 21, 10:54 PM EDT | Severe Thunderstorm Warning | PHI | Delaware | 25 min |
| Jul 21, 11:05 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Lehigh, Montgomery | 40 min |
| Jul 21, 11:31 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery, Philadelphia | 44 min |
| Jul 21, 11:40 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Carbon, Lehigh, Montgomery, Northampton | 50 min |
| Jul 22, 12:05 AM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe | 40 min |
| Jul 22, 1:06 AM EDT | Severe Thunderstorm Warning | BGM | Luzerne | 39 min |
| Jul 22, 3:00 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 60 min |
| Jul 22, 3:17 PM EDT | Severe Thunderstorm Warning | CTP | Lebanon, Schuylkill | 58 min |
| Jul 22, 3:27 PM EDT | Severe Thunderstorm Warning | PHI | Monroe | 48 min |
| Jul 22, 3:47 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 58 min |
| Jul 22, 3:59 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, York | 61 min |
| Jul 22, 4:11 PM EDT | Severe Thunderstorm Warning | CTP | Lebanon, Schuylkill | 33 min |
| Jul 22, 4:16 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 59 min |
| Jul 22, 4:55 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Lehigh, Montgomery, Northampton | 50 min |
| Jul 22, 5:04 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 41 min |
| Jul 22, 5:14 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Chester, Delaware, Montgomery, Philadelphia | 61 min |
| Jul 22, 5:17 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Lehigh, Montgomery, Northampton | 73 min |
| Jul 22, 5:40 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Philadelphia | 80 min |
| Jul 22, 5:50 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 40 min |
| Jul 22, 8:20 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 40 min |
| Jul 22, 10:06 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, York | 27 min |
| Jul 24, 1:15 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 28 min |
| Jul 28, 4:04 PM EDT | Severe Thunderstorm Warning | CTP | Tioga | 26 min |
| Jul 28, 4:07 PM EDT | Severe Thunderstorm Warning | BGM | Bradford | 38 min |
| Jul 28, 4:43 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Montour | 30 min |
| Jul 28, 5:14 PM EDT | Severe Thunderstorm Warning | CTP | Potter | 46 min |
| Jul 28, 6:24 PM EDT | Severe Thunderstorm Warning | CTP | Potter | 36 min |
| Jul 30, 1:53 PM EDT | Severe Thunderstorm Warning | CTP | Clearfield | 39 min |
| Jul 30, 3:38 PM EDT | Severe Thunderstorm Warning | CTP | Snyder | 52 min |
| Jul 30, 3:54 PM EDT | Severe Thunderstorm Warning | CTP | Northumberland | 81 min |
| Jul 30, 4:42 PM EDT | Severe Thunderstorm Warning | BGM | Bradford | 48 min |
| Jul 30, 4:47 PM EDT | Severe Thunderstorm Warning | BGM | Bradford | 58 min |
| Jul 30, 4:54 PM EDT | Severe Thunderstorm Warning | BGM | Lackawanna, Luzerne, Wayne | 66 min |
| Jul 30, 4:59 PM EDT | Severe Thunderstorm Warning | BGM | Luzerne | 61 min |
| Jul 30, 5:46 PM EDT | Severe Thunderstorm Warning | BGM | Lackawanna, Susquehanna, Wayne | 44 min |
| Jul 30, 6:58 PM EDT | Severe Thunderstorm Warning | CTP | York | 47 min |
| Jul 30, 7:17 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 40 min |
| Jul 31, 1:02 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery, Philadelphia | 28 min |
| Jul 31, 1:30 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Delaware, Montgomery, Philadelphia | 45 min |
| Jul 31, 2:11 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 49 min |
| Jul 31, 2:46 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Chester, Delaware, Montgomery, Philadelphia | 44 min |
| Jul 31, 3:24 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Chester, Delaware, Montgomery, Philadelphia | 51 min |
| Jul 31, 3:49 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Delaware, Montgomery, Philadelphia | 41 min |
| Jul 31, 4:10 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver, Lawrence | 50 min |
| Jul 31, 4:52 PM EDT | Severe Thunderstorm Warning | PHI | Monroe, Northampton | 38 min |
| Jul 31, 5:08 PM EDT | Severe Thunderstorm Warning | BGM | Pike | 37 min |
| Jul 31, 5:08 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver | 21 min |
| Jul 31, 5:39 PM EDT | Severe Thunderstorm Warning | BGM | Pike | 30 min |
| Aug 1, 2:32 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 43 min |
| Aug 1, 3:13 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 62 min |
| Aug 1, 3:24 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 66 min |
| Aug 1, 4:09 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 36 min |
| Aug 2, 10:37 AM EDT | Severe Thunderstorm Warning | PBZ | Indiana, Jefferson | 38 min |
| Aug 2, 11:17 AM EDT | Severe Thunderstorm Warning | CTP | Clearfield | 58 min |
| Aug 2, 1:27 PM EDT | Severe Thunderstorm Warning | CTP | Clinton, Lycoming | 33 min |
| Aug 2, 2:45 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette | 30 min |
| Aug 2, 3:21 PM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 39 min |
| Aug 2, 3:28 PM EDT | Severe Thunderstorm Warning | BGM | Luzerne | 32 min |
| Aug 2, 3:46 PM EDT | Severe Thunderstorm Warning | PBZ | Greene, Washington | 29 min |
| Aug 2, 4:31 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Fayette, Washington, Westmoreland | 44 min |
| Aug 2, 5:01 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Montour, Northumberland, Schuylkill | 59 min |
| Aug 2, 5:13 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 47 min |
| Aug 2, 6:33 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette | 27 min |
| Aug 5, 3:44 PM EDT | Severe Thunderstorm Warning | CLE | Erie | 25 min |
| Aug 6, 12:36 PM EDT | Severe Thunderstorm Warning | PHI | Montgomery, Philadelphia | 39 min |
| Aug 6, 2:44 PM EDT | Severe Thunderstorm Warning | CLE | Crawford, Erie | 61 min |
| Aug 6, 3:37 PM EDT | Severe Thunderstorm Warning | CLE | Erie | 68 min |
| Aug 6, 4:04 PM EDT | Severe Thunderstorm Warning | PBZ | Lawrence, Mercer | 41 min |
| Aug 6, 7:32 PM EDT | Severe Thunderstorm Warning | PHI | Northampton | 43 min |
| Aug 7, 1:22 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 38 min |
| Aug 7, 1:26 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 49 min |
| Aug 7, 1:39 PM EDT | Severe Thunderstorm Warning | CTP | Lebanon | 36 min |
| Aug 7, 1:46 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 44 min |
| Aug 7, 3:18 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 42 min |
| Aug 7, 3:24 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Lehigh, Monroe, Northampton | 51 min |
| Aug 7, 3:54 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Northampton | 51 min |
| Aug 7, 4:09 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Delaware, Montgomery, Philadelphia | 66 min |
| Aug 7, 4:14 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Monroe, Northampton | 46 min |
| Aug 7, 4:27 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 63 min |
| Aug 7, 5:16 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Delaware, Montgomery, Philadelphia | 59 min |
| Aug 7, 5:57 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 78 min |
| Aug 8, 2:02 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Clearfield | 43 min |
| Aug 8, 2:12 PM EDT | Severe Thunderstorm Warning | BGM | Bradford | 63 min |
| Aug 8, 2:34 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Clinton | 41 min |
| Aug 8, 2:56 PM EDT | Severe Thunderstorm Warning | BGM | Bradford, Susquehanna | 49 min |
| Aug 8, 3:42 PM EDT | Severe Thunderstorm Warning | BGM | Bradford, Susquehanna, Wayne | 63 min |
| Aug 8, 4:01 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Washington | 44 min |
| Aug 8, 4:26 PM EDT | Severe Thunderstorm Warning | BGM | Lackawanna, Luzerne, Pike, Susquehanna, Wayne, Wyoming | 49 min |
| Aug 8, 4:54 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Fayette, Washington, Westmoreland | 51 min |
| Aug 8, 5:11 PM EDT | Severe Thunderstorm Warning | BGM | Lackawanna, Luzerne, Pike, Wayne, Wyoming | 64 min |
| Aug 8, 5:31 PM EDT | Severe Thunderstorm Warning | PHI | Monroe | 44 min |
| Aug 8, 5:41 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Westmoreland | 49 min |
| Aug 8, 5:46 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Fayette, Washington, Westmoreland | 26 min |
| Aug 15, 2:02 PM EDT | Severe Thunderstorm Warning | PBZ | Mercer | 43 min |
| Aug 15, 2:27 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Armstrong, Westmoreland | 48 min |
| Aug 15, 2:36 PM EDT | Severe Thunderstorm Warning | PBZ | Mercer, Venango | 27 min |
| Aug 15, 2:42 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Washington | 48 min |
| Aug 15, 2:58 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Indiana | 47 min |
| Aug 15, 2:59 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 46 min |
| Aug 15, 3:00 PM EDT | Severe Thunderstorm Warning | CTP | Bedford | 60 min |
| Aug 15, 3:37 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana | 16 min |
| Aug 15, 3:38 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Indiana, Westmoreland | 31 min |
| Aug 15, 3:42 PM EDT | Severe Thunderstorm Warning | PHI | Carbon | 48 min |
| Aug 15, 3:43 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong | 47 min |
| Aug 15, 3:47 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming | 58 min |
| Aug 15, 3:56 PM EDT | Severe Thunderstorm Warning | CTP | Clinton | 94 min |
| Aug 15, 4:03 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Clearfield | 57 min |
| Aug 15, 4:06 PM EDT | Severe Thunderstorm Warning | CTP | Bedford, Fulton | 27 min |
| Aug 15, 4:22 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe, Northampton | 53 min |
| Aug 15, 4:37 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 23 min |
| Aug 15, 5:00 PM EDT | Severe Thunderstorm Warning | PBZ | Butler, Lawrence, Mercer | 32 min |
| Aug 15, 5:02 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana | 27 min |
| Aug 15, 5:08 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming | 67 min |
| Aug 15, 5:19 PM EDT | Severe Thunderstorm Warning | CTP | Cambria, Clearfield | 56 min |
| Aug 15, 5:22 PM EDT | Severe Thunderstorm Warning | CTP | Blair, Huntingdon | 53 min |
| Aug 15, 5:28 PM EDT | Severe Thunderstorm Warning | CTP | Potter, Tioga | 62 min |
| Aug 15, 5:53 PM EDT | Severe Thunderstorm Warning | CTP | Blair, Cambria | 67 min |
| Aug 15, 6:16 PM EDT | Severe Thunderstorm Warning | CTP | Huntingdon, Mifflin | 59 min |
| Aug 15, 6:18 PM EDT | Severe Thunderstorm Warning | PBZ | Mercer | 27 min |
| Aug 15, 6:51 PM EDT | Severe Thunderstorm Warning | CTP | McKean, Potter | 54 min |
| Aug 15, 6:55 PM EDT | Severe Thunderstorm Warning | CTP | Huntingdon, Juniata, Mifflin, Perry, Snyder | 65 min |
| Aug 15, 7:18 PM EDT | Severe Thunderstorm Warning | CTP | Huntingdon | 72 min |
| Aug 15, 7:22 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 52 min |
| Aug 15, 7:27 PM EDT | Severe Thunderstorm Warning | BGM | Bradford | 63 min |
| Aug 15, 7:33 PM EDT | Severe Thunderstorm Warning | CTP | Potter | 57 min |
| Aug 15, 7:38 PM EDT | Severe Thunderstorm Warning | CTP | McKean, Potter | 67 min |
| Aug 15, 7:59 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland, Franklin, Huntingdon, Juniata, Perry | 61 min |
| Aug 15, 8:04 PM EDT | Severe Thunderstorm Warning | BGM | Bradford, Susquehanna | 56 min |
| Aug 15, 8:07 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 53 min |
| Aug 15, 9:01 PM EDT | Severe Thunderstorm Warning | CTP | Sullivan | 59 min |
| Aug 15, 9:13 PM EDT | Severe Thunderstorm Warning | CLE | Erie | 32 min |
| Aug 15, 9:13 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland, Franklin | 62 min |
| Aug 15, 9:22 PM EDT | Severe Thunderstorm Warning | BGM | Bradford, Susquehanna | 53 min |
| Aug 15, 9:39 PM EDT | Severe Thunderstorm Warning | BGM | Luzerne, Wyoming | 51 min |
| Aug 15, 10:03 PM EDT | Severe Thunderstorm Warning | CTP | Adams, Cumberland, Dauphin, York | 57 min |
| Aug 15, 10:19 PM EDT | Severe Thunderstorm Warning | BGM | Luzerne | 37 min |
| Aug 16, 3:48 PM EDT | Severe Thunderstorm Warning | BGM | Pike, Wayne | 57 min |
| Aug 17, 2:47 PM EDT | Severe Thunderstorm Warning | CTP | Warren | 43 min |
| Aug 17, 3:04 PM EDT | Severe Thunderstorm Warning | CTP | McKean | 56 min |
| Aug 17, 3:27 PM EDT | Severe Thunderstorm Warning | PBZ | Venango | 48 min |
| Aug 17, 3:31 PM EDT | Severe Thunderstorm Warning | PBZ | Mercer | 44 min |
| Aug 17, 3:59 PM EDT | Severe Thunderstorm Warning | CTP | Potter, Tioga | 61 min |
| Aug 17, 4:05 PM EDT | Severe Thunderstorm Warning | CTP | McKean | 22 min |
| Aug 17, 4:11 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion, Forest, Venango | 49 min |
| Aug 17, 4:13 PM EDT | Severe Thunderstorm Warning | PBZ | Mercer | 47 min |
| Aug 17, 4:41 PM EDT | Severe Thunderstorm Warning | BGM | Lackawanna, Wayne | 49 min |
| Aug 17, 4:57 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion, Forest, Jefferson | 48 min |
| Aug 17, 5:01 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Butler, Clarion, Venango | 44 min |
| Aug 17, 5:37 PM EDT | Severe Thunderstorm Warning | CTP | Tioga | 27 min |
| Aug 17, 5:46 PM EDT | Severe Thunderstorm Warning | CTP | Clearfield | 74 min |
| Aug 17, 6:02 PM EDT | Severe Thunderstorm Warning | BGM | Bradford | 43 min |
| Aug 17, 6:33 PM EDT | Severe Thunderstorm Warning | BGM | Bradford, Susquehanna | 42 min |
| Aug 17, 7:15 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Armstrong, Westmoreland | 30 min |
| Aug 17, 7:51 PM EDT | Severe Thunderstorm Warning | BGM | Luzerne | 39 min |
| Aug 18, 7:27 AM EDT | Severe Thunderstorm Warning | CLE | Crawford, Erie | 63 min |
| Aug 18, 12:35 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Clarion, Jefferson | 27 min |
| Aug 18, 12:44 PM EDT | Severe Thunderstorm Warning | CTP | Cameron, Elk, McKean | 76 min |
| Aug 18, 1:36 PM EDT | Severe Thunderstorm Warning | CTP | Cameron, Clinton, Elk, Potter | 54 min |
| Aug 18, 2:02 PM EDT | Severe Thunderstorm Warning | CTP | Cameron, Clearfield, Clinton | 58 min |
| Aug 18, 2:02 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Fayette, Washington, Westmoreland | 43 min |
| Aug 18, 2:09 PM EDT | Severe Thunderstorm Warning | CTP | Tioga | 81 min |
| Aug 18, 2:13 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Clarion, Jefferson | 47 min |
| Aug 18, 2:17 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Westmoreland | 43 min |
| Aug 18, 2:21 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 39 min |
| Aug 18, 2:26 PM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 49 min |
| Aug 18, 2:28 PM EDT | Severe Thunderstorm Warning | CTP | Cameron, Clinton, Potter | 62 min |
| Aug 18, 2:45 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Clinton, Lycoming | 60 min |
| Aug 18, 2:48 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana, Jefferson | 28 min |
| Aug 18, 2:50 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana, Westmoreland | 28 min |
| Aug 18, 3:00 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Greene | 45 min |
| Aug 18, 3:16 PM EDT | Severe Thunderstorm Warning | BGM | Bradford | 44 min |
| Aug 18, 3:34 PM EDT | Severe Thunderstorm Warning | CTP | Centre | 56 min |
| Aug 18, 3:35 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana, Jefferson | 13 min |
| Aug 18, 3:38 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Washington, Westmoreland | 18 min |
| Aug 18, 4:34 PM EDT | Severe Thunderstorm Warning | BGM | Susquehanna, Wayne | 41 min |
| Aug 18, 4:34 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Montgomery | 41 min |
| Aug 18, 4:47 PM EDT | Severe Thunderstorm Warning | BGM | Luzerne | 43 min |
| Aug 18, 5:06 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Huntingdon, Mifflin | 24 min |
| Aug 18, 5:25 PM EDT | Severe Thunderstorm Warning | CTP | Juniata, Mifflin | 50 min |
| Aug 18, 5:30 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion, Forest, Jefferson, Venango | 45 min |
| Aug 18, 5:34 PM EDT | Severe Thunderstorm Warning | CLE | Crawford, Erie | 40 min |
| Aug 18, 5:36 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 39 min |
| Aug 18, 5:38 PM EDT | Severe Thunderstorm Warning | PBZ | Mercer | 52 min |
| Aug 18, 5:38 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Lehigh, Northampton | 52 min |
| Aug 18, 6:01 PM EDT | Severe Thunderstorm Warning | CTP | Perry | 44 min |
| Aug 18, 6:11 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion, Forest, Jefferson | 34 min |
| Aug 18, 6:30 PM EDT | Severe Thunderstorm Warning | CTP | Elk | 44 min |
| Aug 18, 6:40 PM EDT | Severe Thunderstorm Warning | PHI | Monroe, Northampton | 54 min |
| Aug 18, 7:53 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, Lebanon | 55 min |
| Aug 19, 1:39 AM EDT | Severe Thunderstorm Warning | PBZ | Mercer, Venango | 36 min |
| Aug 19, 3:56 PM EDT | Severe Thunderstorm Warning | PHI | Philadelphia | 37 min |
| Aug 20, 5:33 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver, Lawrence | 26 min |
| Aug 20, 6:32 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin, York | 43 min |
| Aug 20, 10:18 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Greene | 42 min |
| Aug 21, 3:08 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester, Montgomery | 34 min |
| Aug 21, 4:07 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Montgomery | 38 min |
| Aug 22, 4:27 PM EDT | Severe Thunderstorm Warning | CTP | Blair, Cambria, Huntingdon | 63 min |
| Aug 22, 6:01 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe, Northampton | 44 min |
| Aug 22, 6:43 PM EDT | Severe Thunderstorm Warning | PHI | Monroe, Northampton | 47 min |
| Sep 1, 5:17 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette | 43 min |
| Sep 1, 7:59 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver | 17 min |
| Sep 1, 8:08 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver | 52 min |
| Sep 1, 8:26 PM EDT | Severe Thunderstorm Warning | PBZ | Mercer, Venango | 49 min |
| Sep 1, 11:37 PM EDT | Severe Thunderstorm Warning | PBZ | Greene, Washington | 38 min |
| Sep 2, 6:31 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, York | 29 min |
| Sep 4, 3:29 AM EDT | Severe Thunderstorm Warning | CLE | Crawford, Erie | 47 min |
| Sep 4, 12:37 PM EDT | Severe Thunderstorm Warning | BGM | Susquehanna | 53 min |
| Sep 4, 6:02 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 43 min |
| Sep 11, 3:28 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver, Lawrence | 47 min |
| Sep 11, 4:00 PM EDT | Severe Thunderstorm Warning | PBZ | Butler, Lawrence, Mercer | 45 min |
| Sep 11, 4:34 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver, Butler, Lawrence | 41 min |
| Sep 11, 4:48 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Northumberland, Schuylkill | 57 min |
| Sep 11, 4:59 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Butler | 46 min |
| Sep 11, 5:10 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Butler, Clarion, Venango | 50 min |
| Sep 11, 5:14 PM EDT | Severe Thunderstorm Warning | CLE | Crawford, Erie | 31 min |
| Sep 11, 5:35 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion, Jefferson, Venango | 26 min |
| Sep 11, 6:15 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Montgomery | 45 min |
| Sep 11, 6:56 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana | 19 min |
| Sep 11, 6:59 PM EDT | Severe Thunderstorm Warning | CTP | Cambria | 61 min |
| Sep 11, 7:09 PM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 17 min |
| Sep 11, 7:30 PM EDT | Severe Thunderstorm Warning | CTP | Bedford, Blair, Huntingdon | 75 min |
| Sep 11, 7:59 PM EDT | Severe Thunderstorm Warning | CLE | Erie | 31 min |
| Sep 11, 9:02 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 18 min |
| Sep 11, 10:10 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Lehigh, Montgomery | 28 min |
| Sep 13, 8:52 PM EDT | Severe Thunderstorm Warning | CLE | Crawford, Erie | 38 min |
| Sep 13, 9:41 PM EDT | Severe Thunderstorm Warning | CLE | Crawford, Erie | 33 min |
| Sep 13, 11:38 PM EDT | Severe Thunderstorm Warning | PBZ | Mercer, Venango | 37 min |
| Sep 28, 6:16 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Washington | 44 min |
| Sep 28, 6:32 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Greene, Washington | 43 min |
| Sep 28, 6:52 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Indiana, Westmoreland | 38 min |
| Sep 28, 7:13 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Lebanon | 77 min |
| Sep 28, 7:15 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Fayette, Washington, Westmoreland | 45 min |
| Sep 28, 10:41 PM EDT | Severe Thunderstorm Warning | PHI | Philadelphia | 49 min |
| Oct 3, 4:09 PM EDT | Severe Thunderstorm Warning | CTP | Cameron, Elk | 36 min |
| Oct 3, 5:12 PM EDT | Severe Thunderstorm Warning | CTP | Clearfield, Elk | 48 min |
| Oct 31, 4:27 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana | 48 min |
| Oct 31, 5:42 PM EDT | Severe Thunderstorm Warning | CTP | Franklin, Fulton | 48 min |
| Oct 31, 6:27 PM EDT | Severe Thunderstorm Warning | CTP | Adams, Cumberland, Franklin, Perry | 63 min |
| Oct 31, 7:06 PM EDT | Severe Thunderstorm Warning | CTP | Clinton | 13 min |
| Oct 31, 7:08 PM EDT | Severe Thunderstorm Warning | CTP | Adams, Cumberland, Dauphin, Franklin, Juniata, Lebanon and 4 more | 67 min |
| Oct 31, 7:13 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming | 62 min |
| Oct 31, 7:29 PM EDT | Severe Thunderstorm Warning | BGM | Bradford | 61 min |
| Oct 31, 7:51 PM EDT | Severe Thunderstorm Warning | BGM | Bradford | 54 min |
| Oct 31, 8:05 PM EDT | Severe Thunderstorm Warning | CTP | Adams, Dauphin, Lancaster, Lebanon, Schuylkill, York | 85 min |
| Oct 31, 8:10 PM EDT | Severe Thunderstorm Warning | BGM | Bradford, Luzerne, Susquehanna, Wyoming | 50 min |
| Oct 31, 8:11 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Carbon, Lehigh | 64 min |
| Oct 31, 8:33 PM EDT | Severe Thunderstorm Warning | BGM | Lackawanna, Luzerne | 31 min |
| Oct 31, 8:57 PM EDT | Severe Thunderstorm Warning | BGM | Bradford, Susquehanna | 48 min |
| Oct 31, 8:58 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Carbon, Lehigh, Monroe, Northampton | 62 min |
| Oct 31, 9:14 PM EDT | Severe Thunderstorm Warning | BGM | Lackawanna, Susquehanna, Wayne, Wyoming | 46 min |
| Oct 31, 9:20 PM EDT | Severe Thunderstorm Warning | BGM | Lackawanna, Pike, Wayne | 40 min |
| Oct 31, 9:35 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester, Montgomery | 55 min |
| Oct 31, 9:56 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Lehigh, Monroe, Northampton | 64 min |
| Oct 31, 10:23 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Chester, Montgomery | 67 min |
| Oct 31, 10:25 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 50 min |
| Oct 31, 10:43 PM EDT | Severe Thunderstorm Warning | PHI | Monroe, Northampton | 77 min |
| Oct 31, 11:15 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Chester, Delaware, Montgomery, Philadelphia | 60 min |
| Oct 31, 11:54 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 66 min |
| Dec 1, 4:25 PM EST | Severe Thunderstorm Warning | PBZ | Lawrence | 39 min |
| Dec 1, 4:32 PM EST | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Butler | 43 min |
| Dec 1, 4:59 PM EST | Severe Thunderstorm Warning | PBZ | Allegheny, Butler | 46 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Montgomery County69
- Bucks County62
- Chester County59
- Allegheny County55
- Berks County49
- Westmoreland County49
- Northampton County47
- Washington County46
- Delaware County45
- Beaver County43
- Butler County41
- Philadelphia County41
- Lehigh County37
- Bradford County35
- Lancaster County34
- Fayette County34
- Indiana County33
- York County32
- Armstrong County32
- Franklin County32
- Monroe County32
- Huntingdon County31
- Venango County30
- Susquehanna County30
- Lawrence County29
- Mercer County29
- Luzerne County28
- Lebanon County28
- Clarion County27
- Northumberland County27
- Clearfield County25
- Clinton County25
- Lycoming County25
- Centre County24
- Cumberland County24
- Dauphin County24
- Jefferson County23
- Wayne County23
- Cambria County22
- Juniata County22
27 more counties
- Lackawanna County22
- Carbon County22
- Schuylkill County22
- Crawford County21
- Forest County20
- Mifflin County20
- Perry County20
- Columbia County20
- Bedford County19
- Snyder County19
- Adams County18
- Union County18
- Wyoming County18
- Erie County17
- Potter County17
- Blair County17
- Elk County16
- Fulton County16
- Greene County15
- Tioga County14
- Montour County14
- Pike County13
- Cameron County11
- McKean County10
- Somerset County9
- Sullivan County8
- Warren County6
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20182020
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.