Alert archive / Pennsylvania / Flash Flood Warnings
Flash Flood Warnings in Pennsylvania, 2025
240 flash flood warnings in 2025. 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 flash flood warnings reaches back to 1986.
Flash Flood Warnings by county
Each county as a circle sized by its count in 2025. Tap one for its archive.
- Flash Flood Warnings
- 240
- Busiest month
- July101 flash flood warnings
- Busiest day
- July 14, 202526 flash flood warnings
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
149 of 240 flash flood warnings covering Pennsylvania in 2025 had a flash flood report inside them; 486 of 521 flash flood reports fell inside a warning, on average 69 minutes after it went out.
Pennsylvania, 2025
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Flash flood warnings | 240 | 149 | 38% | 521 | 93% | 69 min |
Each office's whole area, 2025
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Binghamton, NY: flash flood warnings | 72 | 45 | 38% | 124 | 91% | 66 min |
| NWS State College, PA: flash flood warnings | 78 | 35 | 55% | 105 | 94% | 77 min |
| NWS Pittsburgh, PA: flash flood warnings | 125 | 93 | 26% | 452 | 92% | 70 min |
| NWS Cleveland, OH: flash flood warnings | 14 | 2 | 86% | 3 | 100% | 67 min |
| NWS Philadelphia/Mount Holly: flash flood warnings | 96 | 55 | 43% | 203 | 96% | 67 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 |
|---|---|---|---|---|
| Mar 31, 9:44 PM EDT | Flash Flood Warning | PHI | Bucks, Montgomery, Philadelphia | 4 hr |
| Apr 25, 10:58 PM EDT | Flash Flood Warning | PBZ | Butler, Lawrence, Mercer, Venango | 107 min |
| Apr 25, 11:48 PM EDT | Flash Flood Warning | PBZ | Armstrong, Butler, Clarion, Forest, Jefferson, Venango | 2 hr |
| May 3, 7:32 PM EDT | Flash Flood Warning | PHI | Chester, Delaware | 3 hr |
| May 4, 7:25 PM EDT | Flash Flood Warning | BGM | Lackawanna, Susquehanna, Wayne | 3 hr |
| May 4, 8:32 PM EDT | Flash Flood Warning | PBZ | Armstrong | 3 hr |
| May 4, 8:46 PM EDT | Flash Flood Warning | PBZ | Allegheny, Armstrong, Butler, Westmoreland | 3 hr |
| May 4, 10:05 PM EDT | Flash Flood Warning | PBZ | Armstrong, Butler, Lawrence, Mercer, Venango | 4 hr |
| May 5, 7:25 PM EDT | Flash Flood Warning | BGM | Bradford | 2 hr |
| May 5, 8:06 PM EDT | Flash Flood Warning | CTP | Tioga | 3 hr |
| May 5, 9:38 PM EDT | Flash Flood Warning | CTP | Adams, Cumberland, Franklin | 3 hr |
| May 6, 3:07 PM EDT | Flash Flood Warning | BGM | Bradford, Wyoming | 3 hr |
| May 6, 3:27 PM EDT | Flash Flood Warning | CTP | Dauphin | 77 min |
| May 6, 4:23 PM EDT | Flash Flood Warning | BGM | Lackawanna, Susquehanna, Wayne | 3 hr |
| May 6, 4:29 PM EDT | Flash Flood Warning | CTP | Tioga | 3 hr |
| May 8, 2:56 PM EDT | Flash Flood Warning | BGM | Pike | 2 hr |
| May 8, 4:31 PM EDT | Flash Flood Warning | CTP | Centre, Clinton, Union | 2 hr |
| May 8, 4:40 PM EDT | Flash Flood Warning | CTP | Centre | 2 hr |
| May 13, 3:20 PM EDT | Flash Flood Warning | CTP | Bedford, Somerset | 3 hr |
| May 14, 12:09 PM EDT | Flash Flood Warning | PHI | Bucks, Montgomery, Philadelphia | 4 hr |
| May 14, 5:30 PM EDT | Flash Flood Warning | PBZ | Allegheny | 68 min |
| May 15, 6:39 AM EDT | Flash Flood Warning | CTP | Adams, Cumberland, York | 2 hr |
| May 15, 4:56 PM EDT | Flash Flood Warning | PHI | Bucks | 44 min |
| May 16, 9:08 AM EDT | Flash Flood Warning | CTP | Lycoming | 2 hr |
| May 16, 11:32 AM EDT | Flash Flood Warning | PHI | Bucks, Delaware, Montgomery, Philadelphia | 4 hr |
| May 16, 11:41 AM EDT | Flash Flood Warning | PHI | Chester, Delaware | 4 hr |
| May 16, 12:21 PM EDT | Flash Flood Warning | PHI | Bucks, Montgomery | 4 hr |
| May 16, 6:09 PM EDT | Flash Flood Warning | CTP | Cumberland, Dauphin | 2 hr |
| May 21, 3:42 PM EDT | Flash Flood Warning | PBZ | Beaver, Lawrence | 3 hr |
| May 21, 4:30 PM EDT | Flash Flood Warning | PBZ | Butler, Lawrence | 3 hr |
| May 21, 5:28 PM EDT | Flash Flood Warning | PBZ | Allegheny | 2 hr |
| May 21, 8:12 PM EDT | Flash Flood Warning | PBZ | Butler, Lawrence | 3 hr |
| May 30, 6:02 PM EDT | Flash Flood Warning | PBZ | Fayette, Greene, Washington | 5 hr |
| May 30, 7:09 PM EDT | Flash Flood Warning | PBZ | Greene, Washington | 3 hr |
| May 30, 11:12 PM EDT | Flash Flood Warning | PHI | Chester, Delaware | 3 hr |
| May 30, 11:36 PM EDT | Flash Flood Warning | PHI | Bucks, Chester, Delaware, Montgomery, Philadelphia | 4 hr |
| May 31, 12:34 AM EDT | Flash Flood Warning | PHI | Bucks | 3 hr |
| May 31, 1:04 AM EDT | Flash Flood Warning | PHI | Berks, Bucks, Lehigh, Montgomery | 4 hr |
| May 31, 5:43 AM EDT | Flash Flood Warning | BGM | Pike, Wayne | 3 hr |
| Jun 5, 8:06 PM EDT | Flash Flood Warning | CTP | Blair, Cambria | 3 hr |
| Jun 6, 12:08 PM EDT | Flash Flood Warning | PBZ | Lawrence | 4 hr |
| Jun 6, 12:33 PM EDT | Flash Flood Warning | CTP | Columbia, Northumberland, Schuylkill | 3 hr |
| Jun 6, 12:57 PM EDT | Flash Flood Warning | CTP | Franklin | 93 min |
| Jun 6, 1:26 PM EDT | Flash Flood Warning | CTP | Cumberland, Perry | 62 min |
| Jun 6, 2:18 PM EDT | Flash Flood Warning | PBZ | Westmoreland | 117 min |
| Jun 6, 2:46 PM EDT | Flash Flood Warning | PBZ | Fayette, Greene | 105 min |
| Jun 6, 3:00 PM EDT | Flash Flood Warning | PBZ | Allegheny, Westmoreland | 5 hr |
| Jun 6, 3:58 PM EDT | Flash Flood Warning | PBZ | Allegheny, Westmoreland | 4 hr |
| Jun 6, 4:45 PM EDT | Flash Flood Warning | PHI | Berks, Lehigh, Montgomery | 3 hr |
| Jun 6, 4:50 PM EDT | Flash Flood Warning | PBZ | Allegheny | 3 hr |
| Jun 6, 5:29 PM EDT | Flash Flood Warning | PBZ | Allegheny, Fayette, Washington, Westmoreland | 3 hr |
| Jun 6, 7:12 PM EDT | Flash Flood Warning | PBZ | Clarion | 2 hr |
| Jun 6, 7:35 PM EDT | Flash Flood Warning | PBZ | Venango | 104 min |
| Jun 6, 9:02 PM EDT | Flash Flood Warning | PBZ | Allegheny, Beaver | 118 min |
| Jun 7, 4:49 AM EDT | Flash Flood Warning | BGM | Lackawanna, Wyoming | 2 hr |
| Jun 7, 6:18 AM EDT | Flash Flood Warning | BGM | Lackawanna, Luzerne, Wayne | 117 min |
| Jun 7, 10:47 AM EDT | Flash Flood Warning | BGM | Lackawanna, Luzerne | 78 min |
| Jun 8, 4:17 PM EDT | Flash Flood Warning | PBZ | Allegheny | 62 min |
| Jun 9, 6:30 PM EDT | Flash Flood Warning | PBZ | Clarion | 115 min |
| Jun 9, 7:21 PM EDT | Flash Flood Warning | CTP | Blair | 3 hr |
| Jun 9, 7:55 PM EDT | Flash Flood Warning | CTP | Centre | 3 hr |
| Jun 9, 8:19 PM EDT | Flash Flood Warning | CTP | Bedford, Somerset | 3 hr |
| Jun 9, 9:28 PM EDT | Flash Flood Warning | CTP | Bedford | 3 hr |
| Jun 9, 10:04 PM EDT | Flash Flood Warning | CTP | Bedford, Fulton, Huntingdon | 3 hr |
| Jun 9, 10:13 PM EDT | Flash Flood Warning | CTP | Centre, Huntingdon, Mifflin | 3 hr |
| Jun 9, 10:56 PM EDT | Flash Flood Warning | CTP | Mifflin, Snyder, Union | 3 hr |
| Jun 10, 12:03 AM EDT | Flash Flood Warning | CTP | Juniata, Montour, Northumberland, Snyder, Union | 3 hr |
| Jun 10, 1:40 AM EDT | Flash Flood Warning | CTP | Cumberland, Dauphin, Perry, York | 3 hr |
| Jun 10, 6:49 AM EDT | Flash Flood Warning | CTP | Adams, Lancaster, York | 3 hr |
| Jun 13, 11:31 PM EDT | Flash Flood Warning | PBZ | Lawrence | 3 hr |
| Jun 14, 12:20 AM EDT | Flash Flood Warning | PBZ | Allegheny, Armstrong, Indiana, Westmoreland | 2 hr |
| Jun 14, 8:06 PM EDT | Flash Flood Warning | PBZ | Washington | 5 hr |
| Jun 14, 8:46 PM EDT | Flash Flood Warning | PBZ | Allegheny, Washington | 4 hr |
| Jun 15, 11:53 AM EDT | Flash Flood Warning | PBZ | Fayette, Westmoreland | 3 hr |
| Jun 15, 1:20 PM EDT | Flash Flood Warning | PBZ | Indiana, Westmoreland | 117 min |
| Jun 15, 1:21 PM EDT | Flash Flood Warning | PBZ | Fayette, Greene | 3 hr |
| Jun 15, 2:41 PM EDT | Flash Flood Warning | PBZ | Fayette, Washington | 3 hr |
| Jun 15, 3:10 PM EDT | Flash Flood Warning | PBZ | Greene, Washington | 3 hr |
| Jun 15, 3:31 PM EDT | Flash Flood Warning | PBZ | Allegheny, Washington, Westmoreland | 4 hr |
| Jun 15, 4:18 PM EDT | Flash Flood Warning | PBZ | Allegheny, Washington | 3 hr |
| Jun 15, 5:06 PM EDT | Flash Flood Warning | PBZ | Allegheny, Armstrong, Butler, Indiana, Westmoreland | 3 hr |
| Jun 17, 12:34 PM EDT | Flash Flood Warning | PBZ | Allegheny | 3 hr |
| Jun 17, 12:50 PM EDT | Flash Flood Warning | PBZ | Allegheny, Butler | 5 hr |
| Jun 17, 1:06 PM EDT | Flash Flood Warning | PBZ | Allegheny | 4 hr |
| Jun 17, 2:17 PM EDT | Flash Flood Warning | PBZ | Armstrong, Indiana, Jefferson, Westmoreland | 7 hr |
| Jun 17, 2:39 PM EDT | Flash Flood Warning | CTP | Cambria | 3 hr |
| Jun 17, 3:57 PM EDT | Flash Flood Warning | CTP | Blair, Cambria, Somerset | 3 hr |
| Jun 17, 4:48 PM EDT | Flash Flood Warning | CTP | Bedford, Blair | 3 hr |
| Jun 17, 5:44 PM EDT | Flash Flood Warning | PBZ | Clarion, Forest, Mercer, Venango | 3 hr |
| Jun 17, 6:09 PM EDT | Flash Flood Warning | PBZ | Westmoreland | 3 hr |
| Jun 17, 6:19 PM EDT | Flash Flood Warning | CTP | Bedford | 3 hr |
| Jun 17, 6:47 PM EDT | Flash Flood Warning | CTP | Fulton | 3 hr |
| Jun 17, 7:13 PM EDT | Flash Flood Warning | PBZ | Armstrong, Clarion, Forest, Indiana, Jefferson | 2 hr |
| Jun 17, 7:30 PM EDT | Flash Flood Warning | PBZ | Fayette, Westmoreland | 3 hr |
| Jun 17, 8:08 PM EDT | Flash Flood Warning | CTP | Bedford, Blair | 3 hr |
| Jun 18, 9:31 AM EDT | Flash Flood Warning | PBZ | Jefferson | 5 hr |
| Jun 18, 11:20 AM EDT | Flash Flood Warning | CTP | Clearfield | 3 hr |
| Jun 18, 11:25 AM EDT | Flash Flood Warning | PBZ | Armstrong, Butler, Clarion | 3 hr |
| Jun 18, 4:44 PM EDT | Flash Flood Warning | PBZ | Forest, Venango | 3 hr |
| Jun 18, 5:47 PM EDT | Flash Flood Warning | PBZ | Clarion, Forest, Jefferson, Venango | 3 hr |
| Jun 18, 7:15 PM EDT | Flash Flood Warning | CTP | Clearfield, Elk | 2 hr |
| Jun 18, 7:21 PM EDT | Flash Flood Warning | PBZ | Jefferson | 86 min |
| Jun 19, 3:55 PM EDT | Flash Flood Warning | PBZ | Butler, Mercer, Venango | 92 min |
| Jun 22, 8:16 AM EDT | Flash Flood Warning | BGM | Wayne | 3 hr |
| Jun 22, 9:12 AM EDT | Flash Flood Warning | BGM | Susquehanna, Wayne | 3 hr |
| Jun 22, 11:09 AM EDT | Flash Flood Warning | BGM | Lackawanna, Susquehanna, Wyoming | 3 hr |
| Jun 25, 5:38 PM EDT | Flash Flood Warning | PBZ | Allegheny, Washington, Westmoreland | 109 min |
| Jun 25, 8:20 PM EDT | Flash Flood Warning | CTP | Franklin, Fulton | 3 hr |
| Jun 26, 3:46 PM EDT | Flash Flood Warning | BGM | Lackawanna | 2 hr |
| Jun 26, 5:32 PM EDT | Flash Flood Warning | PBZ | Allegheny | 4 hr |
| Jun 26, 5:50 PM EDT | Flash Flood Warning | PBZ | Allegheny, Washington | 3 hr |
| Jun 26, 6:21 PM EDT | Flash Flood Warning | PHI | Berks | 2 hr |
| Jun 26, 6:49 PM EDT | Flash Flood Warning | PHI | Chester, Delaware | 4 hr |
| Jun 26, 7:03 PM EDT | Flash Flood Warning | CTP | Lycoming | 2 hr |
| Jun 26, 7:26 PM EDT | Flash Flood Warning | PBZ | Washington | 4 hr |
| Jun 26, 7:27 PM EDT | Flash Flood Warning | PHI | Chester, Delaware | 4 hr |
| Jun 26, 9:30 PM EDT | Flash Flood Warning | CTP | Cumberland | 2 hr |
| Jun 27, 10:22 AM EDT | Flash Flood Warning | CTP | Lancaster | 3 hr |
| Jun 27, 2:09 PM EDT | Flash Flood Warning | PBZ | Indiana, Westmoreland | 3 hr |
| Jun 27, 4:58 PM EDT | Flash Flood Warning | PBZ | Allegheny | 3 hr |
| Jun 27, 5:24 PM EDT | Flash Flood Warning | PBZ | Allegheny | 3 hr |
| Jun 27, 5:55 PM EDT | Flash Flood Warning | PBZ | Allegheny, Washington | 3 hr |
| Jun 28, 4:29 PM EDT | Flash Flood Warning | PBZ | Armstrong, Indiana, Jefferson | 108 min |
| Jun 28, 5:25 PM EDT | Flash Flood Warning | PBZ | Allegheny, Westmoreland | 3 hr |
| Jun 28, 8:35 PM EDT | Flash Flood Warning | CTP | Lancaster | 3 hr |
| Jun 30, 2:19 PM EDT | Flash Flood Warning | PHI | Delaware, Philadelphia | 4 hr |
| Jun 30, 3:44 PM EDT | Flash Flood Warning | PBZ | Forest, Venango | 4 hr |
| Jun 30, 5:05 PM EDT | Flash Flood Warning | CTP | Cumberland | 3 hr |
| Jun 30, 5:39 PM EDT | Flash Flood Warning | CTP | Lancaster, Lebanon | 3 hr |
| Jun 30, 8:46 PM EDT | Flash Flood Warning | CTP | Dauphin, Lancaster, Lebanon | 4 hr |
| Jun 30, 10:47 PM EDT | Flash Flood Warning | CTP | Lancaster, Lebanon | 4 hr |
| Jun 30, 11:10 PM EDT | Flash Flood Warning | CTP | Adams, York | 3 hr |
| Jun 30, 11:20 PM EDT | Flash Flood Warning | PHI | Berks | 4 hr |
| Jul 1, 10:51 AM EDT | Flash Flood Warning | PBZ | Allegheny, Washington | 3 hr |
| Jul 1, 11:21 AM EDT | Flash Flood Warning | PBZ | Allegheny, Armstrong, Indiana, Westmoreland | 3 hr |
| Jul 1, 12:15 PM EDT | Flash Flood Warning | PBZ | Armstrong, Indiana, Westmoreland | 3 hr |
| Jul 1, 1:34 PM EDT | Flash Flood Warning | CTP | Bedford, Blair, Huntingdon, Mifflin, Somerset | 3 hr |
| Jul 1, 2:27 PM EDT | Flash Flood Warning | CTP | Huntingdon, Juniata, Perry | 3 hr |
| Jul 1, 3:00 PM EDT | Flash Flood Warning | PHI | Chester | 4 hr |
| Jul 1, 3:31 PM EDT | Flash Flood Warning | PHI | Bucks, Montgomery, Philadelphia | 4 hr |
| Jul 1, 4:00 PM EDT | Flash Flood Warning | CTP | Dauphin, Lebanon | 3 hr |
| Jul 1, 4:28 PM EDT | Flash Flood Warning | CTP | Lancaster | 3 hr |
| Jul 1, 4:32 PM EDT | Flash Flood Warning | CTP | Lancaster | 3 hr |
| Jul 1, 4:44 PM EDT | Flash Flood Warning | PHI | Chester | 4 hr |
| Jul 1, 4:55 PM EDT | Flash Flood Warning | PHI | Berks, Chester, Montgomery | 4 hr |
| Jul 1, 5:14 PM EDT | Flash Flood Warning | PHI | Berks, Bucks, Lehigh, Montgomery | 4 hr |
| Jul 3, 6:11 PM EDT | Flash Flood Warning | PHI | Carbon, Lehigh, Northampton | 4 hr |
| Jul 7, 1:39 PM EDT | Flash Flood Warning | PHI | Chester | 4 hr |
| Jul 7, 7:06 PM EDT | Flash Flood Warning | PBZ | Allegheny, Butler | 53 min |
| Jul 8, 3:39 PM EDT | Flash Flood Warning | CTP | Cumberland, Dauphin, Lancaster, Lebanon, York | 3 hr |
| Jul 8, 4:05 PM EDT | Flash Flood Warning | PHI | Berks | 4 hr |
| Jul 8, 4:39 PM EDT | Flash Flood Warning | PHI | Chester | 4 hr |
| Jul 8, 4:44 PM EDT | Flash Flood Warning | CTP | Lancaster, York | 3 hr |
| Jul 8, 4:53 PM EDT | Flash Flood Warning | BGM | Bradford | 3 hr |
| Jul 8, 5:02 PM EDT | Flash Flood Warning | PHI | Chester | 4 hr |
| Jul 8, 5:31 PM EDT | Flash Flood Warning | PHI | Chester, Delaware | 4 hr |
| Jul 8, 5:45 PM EDT | Flash Flood Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 4 hr |
| Jul 8, 5:53 PM EDT | Flash Flood Warning | BGM | Bradford | 3 hr |
| Jul 8, 5:53 PM EDT | Flash Flood Warning | PHI | Bucks, Montgomery, Philadelphia | 4 hr |
| Jul 9, 5:14 PM EDT | Flash Flood Warning | CTP | York | 3 hr |
| Jul 9, 6:19 PM EDT | Flash Flood Warning | CTP | Lancaster, York | 2 hr |
| Jul 9, 6:39 PM EDT | Flash Flood Warning | PHI | Chester | 4 hr |
| Jul 9, 6:40 PM EDT | Flash Flood Warning | CTP | Lancaster, York | 3 hr |
| Jul 9, 7:17 PM EDT | Flash Flood Warning | CTP | York | 3 hr |
| Jul 9, 7:18 PM EDT | Flash Flood Warning | PHI | Delaware | 4 hr |
| Jul 9, 7:38 PM EDT | Flash Flood Warning | PHI | Delaware | 4 hr |
| Jul 9, 7:47 PM EDT | Flash Flood Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 4 hr |
| Jul 9, 8:00 PM EDT | Flash Flood Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 4 hr |
| Jul 9, 8:32 PM EDT | Flash Flood Warning | PHI | Delaware | 4 hr |
| Jul 9, 8:47 PM EDT | Flash Flood Warning | PHI | Bucks, Philadelphia | 2 hr |
| Jul 11, 3:32 PM EDT | Flash Flood Warning | PHI | Monroe | 3 hr |
| Jul 11, 7:56 PM EDT | Flash Flood Warning | CTP | Clinton, Lycoming, Union | 3 hr |
| Jul 12, 3:02 PM EDT | Flash Flood Warning | BGM | Pike, Wayne | 4 hr |
| Jul 12, 3:06 PM EDT | Flash Flood Warning | CTP | Adams | 3 hr |
| Jul 12, 4:59 PM EDT | Flash Flood Warning | BGM | Lackawanna, Luzerne, Wayne | 113 min |
| Jul 12, 7:31 PM EDT | Flash Flood Warning | PHI | Delaware | 80 min |
| Jul 12, 8:22 PM EDT | Flash Flood Warning | CTP | Somerset | 3 hr |
| Jul 12, 8:38 PM EDT | Flash Flood Warning | CTP | Franklin | 3 hr |
| Jul 13, 12:19 PM EDT | Flash Flood Warning | CTP | York | 3 hr |
| Jul 13, 3:46 PM EDT | Flash Flood Warning | PBZ | Allegheny, Westmoreland | 2 hr |
| Jul 13, 6:08 PM EDT | Flash Flood Warning | CTP | Bedford | 3 hr |
| Jul 13, 6:33 PM EDT | Flash Flood Warning | CTP | Huntingdon | 3 hr |
| Jul 13, 8:25 PM EDT | Flash Flood Warning | CTP | McKean, Warren | 2 hr |
| Jul 13, 10:03 PM EDT | Flash Flood Warning | CTP | Lycoming, Sullivan | 5 hr |
| Jul 13, 10:16 PM EDT | Flash Flood Warning | BGM | Bradford, Susquehanna | 84 min |
| Jul 13, 11:21 PM EDT | Flash Flood Warning | CTP | Sullivan | 4 hr |
| Jul 14, 12:35 AM EDT | Flash Flood Warning | BGM | Susquehanna | 3 hr |
| Jul 14, 12:46 AM EDT | Flash Flood Warning | BGM | Luzerne, Wyoming | 3 hr |
| Jul 14, 2:15 AM EDT | Flash Flood Warning | BGM | Wayne | 3 hr |
| Jul 14, 2:25 AM EDT | Flash Flood Warning | BGM | Lackawanna, Luzerne | 2 hr |
| Jul 14, 6:44 AM EDT | Flash Flood Warning | BGM | Luzerne | 4 hr |
| Jul 14, 6:57 AM EDT | Flash Flood Warning | PBZ | Allegheny | 2 hr |
| Jul 14, 11:33 AM EDT | Flash Flood Warning | PBZ | Lawrence | 3 hr |
| Jul 14, 1:23 PM EDT | Flash Flood Warning | CTP | Columbia, Lycoming, Sullivan | 3 hr |
| Jul 14, 1:29 PM EDT | Flash Flood Warning | CTP | Bedford | 2 hr |
| Jul 14, 1:42 PM EDT | Flash Flood Warning | CTP | Clinton, Lycoming, Northumberland, Sullivan, Union | 3 hr |
| Jul 14, 2:20 PM EDT | Flash Flood Warning | CTP | Dauphin, Lancaster, Lebanon | 6 hr |
| Jul 14, 3:04 PM EDT | Flash Flood Warning | BGM | Bradford, Luzerne, Wyoming | 3 hr |
| Jul 14, 3:37 PM EDT | Flash Flood Warning | PHI | Carbon, Monroe | 4 hr |
| Jul 14, 3:50 PM EDT | Flash Flood Warning | BGM | Luzerne | 3 hr |
| Jul 14, 3:57 PM EDT | Flash Flood Warning | CTP | Lancaster, York | 3 hr |
| Jul 14, 4:31 PM EDT | Flash Flood Warning | BGM | Lackawanna, Luzerne | 3 hr |
| Jul 14, 4:32 PM EDT | Flash Flood Warning | BGM | Wayne | 2 hr |
| Jul 14, 4:42 PM EDT | Flash Flood Warning | CTP | Dauphin, Lancaster, York | 3 hr |
| Jul 14, 4:49 PM EDT | Flash Flood Warning | PHI | Carbon, Lehigh, Monroe, Northampton | 3 hr |
| Jul 14, 5:25 PM EDT | Flash Flood Warning | PHI | Bucks, Lehigh, Northampton | 4 hr |
| Jul 14, 5:32 PM EDT | Flash Flood Warning | PHI | Berks, Bucks, Chester, Lehigh, Montgomery | 6 hr |
| Jul 14, 7:45 PM EDT | Flash Flood Warning | PHI | Bucks, Montgomery, Philadelphia | 2 hr |
| Jul 16, 1:48 PM EDT | Flash Flood Warning | PBZ | Allegheny, Westmoreland | 3 hr |
| Jul 16, 3:27 PM EDT | Flash Flood Warning | PBZ | Lawrence, Mercer, Venango | 2 hr |
| Jul 16, 3:49 PM EDT | Flash Flood Warning | PBZ | Allegheny, Westmoreland | 103 min |
| Jul 16, 4:01 PM EDT | Flash Flood Warning | PBZ | Butler | 3 hr |
| Jul 16, 5:36 PM EDT | Flash Flood Warning | CTP | Bedford, Blair, Cambria, Somerset | 2 hr |
| Jul 16, 6:20 PM EDT | Flash Flood Warning | PBZ | Allegheny, Armstrong, Butler, Westmoreland | 4 hr |
| Jul 16, 7:03 PM EDT | Flash Flood Warning | CTP | Potter | 107 min |
| Jul 16, 7:38 PM EDT | Flash Flood Warning | PHI | Bucks | 4 hr |
| Jul 16, 7:44 PM EDT | Flash Flood Warning | PBZ | Allegheny, Beaver, Butler, Lawrence | 111 min |
| Jul 16, 8:42 PM EDT | Flash Flood Warning | PBZ | Allegheny, Beaver, Washington, Westmoreland | 2 hr |
| Jul 25, 8:38 AM EDT | Flash Flood Warning | PBZ | Greene | 3 hr |
| Jul 25, 2:38 PM EDT | Flash Flood Warning | PBZ | Greene | 3 hr |
| Jul 26, 7:00 PM EDT | Flash Flood Warning | PBZ | Armstrong, Indiana, Westmoreland | 2 hr |
| Jul 26, 8:15 PM EDT | Flash Flood Warning | PBZ | Washington | 5 hr |
| Jul 31, 12:19 PM EDT | Flash Flood Warning | PHI | Berks | 4 hr |
| Jul 31, 1:14 PM EDT | Flash Flood Warning | CTP | Lancaster, York | 3 hr |
| Jul 31, 1:27 PM EDT | Flash Flood Warning | PHI | Berks, Chester, Montgomery | 4 hr |
| Jul 31, 2:00 PM EDT | Flash Flood Warning | CTP | Lancaster, York | 3 hr |
| Jul 31, 2:03 PM EDT | Flash Flood Warning | PHI | Berks, Bucks, Lehigh, Montgomery | 2 hr |
| Jul 31, 2:09 PM EDT | Flash Flood Warning | PHI | Delaware | 4 hr |
| Jul 31, 2:27 PM EDT | Flash Flood Warning | PHI | Bucks, Delaware, Montgomery, Philadelphia | 4 hr |
| Jul 31, 2:46 PM EDT | Flash Flood Warning | PHI | Delaware | 4 hr |
| Aug 13, 1:35 PM EDT | Flash Flood Warning | CTP | Bedford, Fulton, Huntingdon | 2 hr |
| Aug 13, 2:07 PM EDT | Flash Flood Warning | BGM | Lackawanna, Luzerne | 2 hr |
| Aug 13, 5:03 PM EDT | Flash Flood Warning | CTP | Lancaster | 117 min |
| Aug 13, 6:54 PM EDT | Flash Flood Warning | PHI | Bucks, Montgomery, Philadelphia | 2 hr |
| Aug 13, 6:59 PM EDT | Flash Flood Warning | PHI | Chester | 2 hr |
| Aug 13, 8:40 PM EDT | Flash Flood Warning | PBZ | Beaver, Butler | 98 min |
| Aug 16, 2:19 AM EDT | Flash Flood Warning | CTP | Schuylkill | 3 hr |
| Aug 16, 12:15 PM EDT | Flash Flood Warning | CTP | Franklin | 89 min |
| Aug 17, 10:01 PM EDT | Flash Flood Warning | PHI | Bucks, Montgomery, Philadelphia | 119 min |
| Sep 23, 6:26 PM EDT | Flash Flood Warning | CTP | Lancaster | 2 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Allegheny County34
- Westmoreland County24
- Montgomery County21
- Bucks County20
- Chester County20
- Delaware County19
- Lancaster County19
- Washington County16
- Philadelphia County15
- Butler County15
- York County15
- Armstrong County14
- Bedford County12
- Lackawanna County11
- Berks County11
- Lawrence County10
- Venango County10
- Wayne County10
- Luzerne County10
- Indiana County10
- Cumberland County8
- Dauphin County8
- Lehigh County8
- Clarion County7
- Jefferson County7
- Fayette County7
- Greene County7
- Blair County7
- Forest County6
- Susquehanna County6
- Bradford County6
- Somerset County6
- Lycoming County6
- Huntingdon County6
- Lebanon County6
- Mercer County5
- Adams County5
- Franklin County5
- Wyoming County5
- Union County5
24 more counties
- Beaver County5
- Centre County4
- Cambria County4
- Fulton County4
- Sullivan County4
- Pike County3
- Clinton County3
- Northumberland County3
- Perry County3
- Mifflin County3
- Carbon County3
- Northampton County3
- Monroe County3
- Tioga County2
- Columbia County2
- Schuylkill County2
- Snyder County2
- Juniata County2
- Clearfield County2
- Montour County1
- Elk County1
- McKean County1
- Warren County1
- Potter County1
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20242026
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.