Alert archive / Pennsylvania / 2004
Weather alerts in Pennsylvania, August 2004
221 weather alerts in August 2004, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered any part of the state, so the counties below add up to more than the state.
Weather alerts by county
Each county as a circle sized by its count in August 2004. Tap one for its archive.
- Alerts
- 221
- Warnings
- 186
- Watches
- 11
- Advisories
- 0
- Busiest day
- August 20, 200444 alerts
Over time
By day
Days in UTC, the clock the archive keeps.
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 |
|---|---|---|---|---|
| Jul 31, 9:31 PM EDT | Flash Flood Warning | CTP | Lancaster | 6 hr |
| Aug 1, 3:56 AM EDT | Flash Flood Warning | CTP | York | 6 hr |
| Aug 1, 4:54 AM EDT | Flash Flood Warning | CTP | Dauphin | 6 hr |
| Aug 1, 7:12 AM EDT | Flash Flood Warning | PHI | Montgomery | 2 hr |
| Aug 1, 7:30 AM EDT | Flash Flood Warning | PHI | Philadelphia | 2 hr |
| Aug 1, 7:43 AM EDT | Flash Flood Warning | PHI | Bucks | 2 hr |
| Aug 1, 7:50 AM EDT | Flash Flood Warning | PHI | Chester, Delaware | 115 min |
| Aug 1, 8:01 AM EDT | Flash Flood Warning | PHI | Montgomery | 89 min |
| Aug 1, 9:08 AM EDT | Flash Flood Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 2 hr |
| Aug 1, 9:34 AM EDT | Flash Flood Warning | CTP | Cumberland | 3 hr |
| Aug 1, 10:59 AM EDT | Flash Flood Warning | PHI | Delaware, Montgomery, Philadelphia | 2 hr |
| Aug 1, 12:52 PM EDT | Flash Flood Warning | PHI | Delaware, Philadelphia | 4 hr |
| Aug 2, 7:29 PM EDT | Flash Flood Warning | CTP | York | 6 hr |
| Aug 2, 7:31 PM EDT | Flash Flood Warning | PHI | Bucks | 119 min |
| Aug 2, 8:14 PM EDT | Flash Flood Warning | CTP | Lancaster | 6 hr |
| Aug 2, 8:39 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 66 min |
| Aug 2, 8:39 PM EDT | Flash Flood Warning | PHI | Monroe | 3 hr |
| Aug 4, 10:39 AM EDT | Mesoscale Discussion | SPC | Allegheny, Beaver, Fayette, Greene, Washington, Westmoreland | 2 hr |
| Aug 4, 11:55 AM EDT | Severe Thunderstorm Watch | SPC | Allegheny, Armstrong, Beaver, Butler, Clarion, Fayette and 8 more | 5 hr |
| Aug 4, 1:14 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver, Lawrence | 61 min |
| Aug 4, 1:27 PM EDT | Severe Thunderstorm Warning | PBZ | Butler | 63 min |
| Aug 4, 2:00 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Washington | 60 min |
| Aug 4, 2:11 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong | 49 min |
| Aug 4, 2:17 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion | 58 min |
| Aug 4, 2:19 PM EDT | Severe Thunderstorm Warning | PBZ | Greene | 56 min |
| Aug 4, 2:22 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana, Jefferson | 68 min |
| Aug 4, 2:30 PM EDT | Severe Thunderstorm Warning | CTP | Clearfield | 75 min |
| Aug 4, 2:31 PM EDT | Mesoscale Discussion | SPC | Allegheny, Bedford, Blair, Cambria, Centre, Clearfield and 13 more | 119 min |
| Aug 4, 2:38 PM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 67 min |
| Aug 4, 2:49 PM EDT | Tornado Warning | CTP | Clearfield | 26 min |
| Aug 4, 2:53 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette | 67 min |
| Aug 4, 2:55 PM EDT | Severe Thunderstorm Watch | SPC | Adams, Bedford, Blair, Cambria, Carbon, Centre and 20 more | 6 hr |
| Aug 4, 3:22 PM EDT | Severe Thunderstorm Warning | CTP | Cambria, Somerset | 53 min |
| Aug 4, 3:33 PM EDT | Tornado Warning | PBZ | Westmoreland | 27 min |
| Aug 4, 3:57 PM EDT | Severe Thunderstorm Warning | CTP | Centre | 63 min |
| Aug 4, 4:09 PM EDT | Severe Thunderstorm Warning | CTP | Bedford, Blair, Cambria, Somerset | 66 min |
| Aug 4, 4:20 PM EDT | Severe Thunderstorm Warning | CTP | Juniata, Perry | 55 min |
| Aug 4, 4:24 PM EDT | Severe Thunderstorm Warning | CTP | Mifflin | 36 min |
| Aug 4, 4:41 PM EDT | Severe Thunderstorm Warning | CTP | Huntingdon | 64 min |
| Aug 4, 4:45 PM EDT | Severe Thunderstorm Warning | CTP | Snyder, Union | 60 min |
| Aug 4, 4:54 PM EDT | Severe Thunderstorm Warning | CTP | Fulton | 36 min |
| Aug 4, 5:14 PM EDT | Severe Thunderstorm Warning | CTP | Juniata, Perry | 61 min |
| Aug 4, 5:19 PM EDT | Severe Thunderstorm Warning | CTP | Franklin | 71 min |
| Aug 4, 5:25 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Northumberland | 65 min |
| Aug 4, 5:43 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland | 62 min |
| Aug 4, 5:48 PM EDT | Mesoscale Discussion | SPC | Adams, Berks, Bucks, Carbon, Chester, Cumberland and 11 more | 117 min |
| Aug 4, 6:02 PM EDT | Tornado Warning | CTP | Cumberland, Dauphin | 43 min |
| Aug 4, 6:06 PM EDT | Severe Thunderstorm Warning | CTP | York | 54 min |
| Aug 4, 6:12 PM EDT | Tornado Warning | CTP | York | 48 min |
| Aug 4, 6:17 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, Lebanon | 73 min |
| Aug 4, 6:36 PM EDT | Tornado Warning | CTP | Lancaster | 39 min |
| Aug 4, 6:58 PM EDT | Tornado Warning | CTP | York | 32 min |
| Aug 4, 7:02 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester | 73 min |
| Aug 4, 7:10 PM EDT | Severe Thunderstorm Watch | SPC | Chester, Delaware, Lancaster, Montgomery, Philadelphia | 4 hr |
| Aug 4, 7:13 PM EDT | Tornado Warning | CTP | Lancaster | 47 min |
| Aug 4, 7:49 PM EDT | Severe Thunderstorm Warning | PHI | Delaware, Montgomery, Philadelphia | 56 min |
| Aug 10, 11:54 AM EDT | Mesoscale Discussion | SPC | Allegheny, Armstrong, Bedford, Blair, Butler, Cambria and 24 more | 96 min |
| Aug 10, 1:10 PM EDT | Severe Thunderstorm Watch | SPC | Allegheny, Armstrong, Beaver, Bradford, Butler, Cameron and 23 more | 7 hr |
| Aug 10, 2:09 PM EDT | Severe Thunderstorm Warning | PBZ | Venango | 51 min |
| Aug 10, 2:43 PM EDT | Severe Thunderstorm Warning | CTP | Warren | 62 min |
| Aug 10, 3:15 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver | 60 min |
| Aug 10, 3:44 PM EDT | Severe Thunderstorm Warning | PBZ | Butler | 61 min |
| Aug 10, 3:55 PM EDT | Severe Thunderstorm Warning | CTP | McKean | 65 min |
| Aug 10, 4:16 PM EDT | Mesoscale Discussion | SPC | Allegheny, Armstrong, Beaver, Bradford, Butler, Cameron and 21 more | 89 min |
| Aug 10, 4:58 PM EDT | Severe Thunderstorm Warning | CTP | Snyder | 47 min |
| Aug 10, 5:09 PM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 51 min |
| Aug 10, 5:13 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong | 47 min |
| Aug 10, 5:18 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette | 57 min |
| Aug 10, 5:27 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana | 63 min |
| Aug 10, 5:33 PM EDT | Severe Thunderstorm Warning | PBZ | Greene | 57 min |
| Aug 10, 5:50 PM EDT | Severe Thunderstorm Warning | CTP | Potter | 40 min |
| Aug 10, 5:56 PM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 64 min |
| Aug 10, 6:16 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette | 59 min |
| Aug 10, 6:17 PM EDT | Severe Thunderstorm Warning | CTP | Cambria | 58 min |
| Aug 10, 6:58 PM EDT | Severe Thunderstorm Warning | CTP | Tioga | 62 min |
| Aug 10, 7:27 PM EDT | Mesoscale Discussion | SPC | Bradford, Centre, Clearfield, Clinton, Lycoming, Sullivan and 3 more | 93 min |
| Aug 10, 7:44 PM EDT | Severe Thunderstorm Warning | CTP | Perry | 31 min |
| Aug 10, 8:05 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin | 40 min |
| Aug 10, 8:43 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin | 32 min |
| Aug 10, 8:51 PM EDT | Severe Thunderstorm Warning | CTP | McKean | 54 min |
| Aug 10, 9:06 PM EDT | Flash Flood Warning | CTP | McKean | 6 hr |
| Aug 10, 9:44 PM EDT | Flash Flood Warning | PBZ | Fayette | 3 hr |
| Aug 11, 11:59 AM EDT | Mesoscale Discussion | SPC | Bucks, Chester, Delaware, Lehigh, Monroe, Montgomery and 4 more | 91 min |
| Aug 11, 12:55 PM EDT | Severe Thunderstorm Watch | SPC | Adams, Berks, Bradford, Bucks, Carbon, Chester and 25 more | 7 hr |
| Aug 11, 2:21 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 54 min |
| Aug 11, 2:28 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 62 min |
| Aug 11, 2:40 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 95 min |
| Aug 11, 2:52 PM EDT | Tornado Warning | CTP | Lancaster | 38 min |
| Aug 11, 3:12 PM EDT | Tornado Warning | PHI | Chester | 78 min |
| Aug 11, 4:04 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 41 min |
| Aug 11, 4:29 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 61 min |
| Aug 11, 4:31 PM EDT | Flash Flood Warning | CTP | Lancaster | 6 hr |
| Aug 11, 5:09 PM EDT | Special Marine Warning | PHI | 81 min | |
| Aug 11, 5:25 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 65 min |
| Aug 11, 5:28 PM EDT | Severe Thunderstorm Warning | PHI | Philadelphia | 32 min |
| Aug 11, 5:37 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 53 min |
| Aug 11, 5:56 PM EDT | Severe Thunderstorm Warning | PHI | Montgomery | 34 min |
| Aug 11, 7:00 PM EDT | Mesoscale Discussion | SPC | Berks, Bucks, Carbon, Chester, Delaware, Lancaster and 8 more | 90 min |
| Aug 11, 8:21 PM EDT | Special Marine Warning | PHI | 54 min | |
| Aug 12, 12:00 PM EDT | Mesoscale Discussion | SPC | Bucks, Carbon, Lackawanna, Lehigh, Monroe, Montgomery and 5 more | 90 min |
| Aug 12, 1:40 PM EDT | Severe Thunderstorm Warning | CTP | Schuylkill | 65 min |
| Aug 12, 1:53 PM EDT | Tornado Warning | CTP | Schuylkill | 52 min |
| Aug 12, 2:45 PM EDT | Severe Thunderstorm Warning | CTP | Schuylkill | 30 min |
| Aug 12, 5:15 PM EDT | Flash Flood Warning | PHI | Berks | 3 hr |
| Aug 12, 5:30 PM EDT | Flash Flood Warning | CTP | Lebanon, Schuylkill | 6 hr |
| Aug 12, 5:51 PM EDT | Flash Flood Warning | CTP | York | 6 hr |
| Aug 12, 5:53 PM EDT | Flash Flood Warning | BGM | Pike | 4 hr |
| Aug 12, 6:57 PM EDT | Severe Thunderstorm Warning | PHI | Monroe, Northampton | 63 min |
| Aug 12, 7:47 PM EDT | Flash Flood Warning | PHI | Berks, Carbon | 3 hr |
| Aug 12, 8:50 PM EDT | Flash Flood Warning | PHI | Chester | 3 hr |
| Aug 12, 9:14 PM EDT | Flash Flood Warning | BGM | Wayne | 3 hr |
| Aug 12, 9:32 PM EDT | Flash Flood Warning | BGM | Pike | 3 hr |
| Aug 12, 10:42 PM EDT | Flash Flood Warning | PHI | Berks | 4 hr |
| Aug 12, 10:59 PM EDT | Flash Flood Warning | PHI | Monroe | 4 hr |
| Aug 13, 12:11 AM EDT | Flash Flood Warning | BGM | Pike | 4 hr |
| Aug 13, 2:41 AM EDT | Flash Flood Warning | PHI | Berks | 3 hr |
| Aug 13, 2:49 AM EDT | Flash Flood Warning | PHI | Monroe | 3 hr |
| Aug 16, 4:01 PM EDT | Severe Thunderstorm Warning | BGM | Susquehanna | 14 min |
| Aug 16, 4:40 PM EDT | Severe Thunderstorm Warning | BGM | Lackawanna | 50 min |
| Aug 17, 8:48 PM EDT | Mesoscale Discussion | SPC | Crawford, Erie, Mercer | 117 min |
| Aug 18, 1:24 PM EDT | Mesoscale Discussion | SPC | Bucks, Chester, Delaware, Lancaster, Lehigh, Montgomery and 2 more | 96 min |
| Aug 18, 6:01 PM EDT | Mesoscale Discussion | SPC | Beaver, Crawford, Lawrence, Mercer, Venango | 89 min |
| Aug 18, 7:14 PM EDT | Special Marine Warning | PHI | 31 min | |
| Aug 19, 1:25 PM EDT | Severe Thunderstorm Warning | PBZ | Butler | 50 min |
| Aug 19, 1:41 PM EDT | Mesoscale Discussion | SPC | Allegheny, Beaver, Fayette, Greene, Indiana, Washington and 1 more | 64 min |
| Aug 19, 2:06 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong | 39 min |
| Aug 19, 2:12 PM EDT | Tornado Warning | PBZ | Armstrong | 33 min |
| Aug 19, 2:26 PM EDT | Tornado Warning | PBZ | Indiana | 34 min |
| Aug 19, 2:30 PM EDT | Severe Thunderstorm Watch | SPC | Allegheny, Beaver, Bedford, Blair, Cambria, Fayette and 10 more | 6 hr |
| Aug 19, 2:46 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 59 min |
| Aug 19, 2:48 PM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 42 min |
| Aug 19, 2:49 PM EDT | Severe Thunderstorm Warning | CTP | Cambria | 56 min |
| Aug 19, 3:01 PM EDT | Tornado Warning | PBZ | Indiana | 59 min |
| Aug 19, 3:15 PM EDT | Tornado Warning | CTP | Cambria | 30 min |
| Aug 19, 3:30 PM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 60 min |
| Aug 19, 4:00 PM EDT | Severe Thunderstorm Warning | CTP | Somerset | 60 min |
| Aug 19, 4:25 PM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 65 min |
| Aug 19, 4:50 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver | 55 min |
| Aug 19, 4:58 PM EDT | Severe Thunderstorm Warning | CTP | York | 62 min |
| Aug 19, 4:58 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 62 min |
| Aug 19, 5:02 PM EDT | Mesoscale Discussion | SPC | Adams, Allegheny, Armstrong, Beaver, Bedford, Blair and 16 more | 88 min |
| Aug 19, 5:46 PM EDT | Severe Thunderstorm Warning | CTP | Adams | 59 min |
| Aug 19, 6:00 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, York | 60 min |
| Aug 19, 6:05 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 55 min |
| Aug 19, 6:10 PM EDT | Severe Thunderstorm Watch | SPC | Adams, Chester, Delaware, Lancaster, York | 4 hr |
| Aug 19, 6:38 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette | 52 min |
| Aug 19, 6:38 PM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 67 min |
| Aug 19, 6:42 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 63 min |
| Aug 19, 6:45 PM EDT | Severe Thunderstorm Warning | CTP | Adams | 30 min |
| Aug 19, 7:26 PM EDT | Mesoscale Discussion | SPC | Allegheny, Washington, Westmoreland | 64 min |
| Aug 19, 8:28 PM EDT | Mesoscale Discussion | SPC | Adams | 92 min |
| Aug 20, 11:56 AM EDT | Mesoscale Discussion | SPC | Bradford, Centre, Clinton, Columbia, Lackawanna, Luzerne and 10 more | 2 hr |
| Aug 20, 1:42 PM EDT | Severe Thunderstorm Warning | CTP | Centre | 48 min |
| Aug 20, 2:05 PM EDT | Severe Thunderstorm Watch | SPC | Blair, Bradford, Cambria, Cameron, Carbon, Centre and 27 more | 5 hr |
| Aug 20, 2:29 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming | 61 min |
| Aug 20, 2:42 PM EDT | Severe Thunderstorm Warning | CTP | Centre | 48 min |
| Aug 20, 3:11 PM EDT | Severe Thunderstorm Warning | CTP | Union | 64 min |
| Aug 20, 3:25 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming | 50 min |
| Aug 20, 3:30 PM EDT | Severe Thunderstorm Warning | BGM | Luzerne | 60 min |
| Aug 20, 3:36 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana | 54 min |
| Aug 20, 3:41 PM EDT | Mesoscale Discussion | SPC | Blair, Bradford, Cambria, Cameron, Carbon, Centre and 27 more | 2 hr |
| Aug 20, 3:46 PM EDT | Severe Thunderstorm Warning | CTP | Columbia | 59 min |
| Aug 20, 3:48 PM EDT | Severe Thunderstorm Warning | CTP | Montour, Northumberland | 42 min |
| Aug 20, 3:55 PM EDT | Severe Thunderstorm Warning | CTP | Sullivan | 50 min |
| Aug 20, 4:01 PM EDT | Severe Thunderstorm Warning | CTP | Clearfield | 89 min |
| Aug 20, 4:03 PM EDT | Mesoscale Discussion | SPC | Adams, Bedford, Berks, Cumberland, Franklin, Fulton and 4 more | 2 hr |
| Aug 20, 4:16 PM EDT | Severe Thunderstorm Warning | BGM | Lackawanna | 59 min |
| Aug 20, 4:25 PM EDT | Severe Thunderstorm Watch | SPC | Allegheny, Armstrong, Beaver, Butler, Cambria, Clearfield and 7 more | 5 hr |
| Aug 20, 4:27 PM EDT | Severe Thunderstorm Warning | BGM | Wyoming | 63 min |
| Aug 20, 4:35 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver | 55 min |
| Aug 20, 4:47 PM EDT | Tornado Warning | PBZ | Beaver | 43 min |
| Aug 20, 5:01 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 59 min |
| Aug 20, 5:04 PM EDT | Severe Thunderstorm Warning | CTP | Centre | 56 min |
| Aug 20, 5:09 PM EDT | Severe Thunderstorm Warning | PBZ | Butler | 66 min |
| Aug 20, 5:19 PM EDT | Severe Thunderstorm Warning | CTP | Schuylkill | 56 min |
| Aug 20, 5:21 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 54 min |
| Aug 20, 5:23 PM EDT | Severe Thunderstorm Warning | CTP | Fulton | 22 min |
| Aug 20, 5:25 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong | 65 min |
| Aug 20, 5:33 PM EDT | Severe Thunderstorm Warning | CTP | Franklin | 57 min |
| Aug 20, 5:39 PM EDT | Severe Thunderstorm Warning | PBZ | Venango | 66 min |
| Aug 20, 5:58 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 62 min |
| Aug 20, 6:02 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion | 58 min |
| Aug 20, 6:02 PM EDT | Severe Thunderstorm Warning | PHI | Lehigh | 43 min |
| Aug 20, 6:06 PM EDT | Severe Thunderstorm Warning | PBZ | Jefferson | 54 min |
| Aug 20, 6:10 PM EDT | Severe Thunderstorm Watch | SPC | Bradford, Cameron, Carbon, Centre, Clinton, Columbia and 21 more | 5 hr |
| Aug 20, 6:25 PM EDT | Severe Thunderstorm Warning | PHI | Northampton | 50 min |
| Aug 20, 6:27 PM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 63 min |
| Aug 20, 6:34 PM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 56 min |
| Aug 20, 6:36 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland | 69 min |
| Aug 20, 6:44 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana | 61 min |
| Aug 20, 6:49 PM EDT | Severe Thunderstorm Warning | CTP | Clearfield, Elk | 56 min |
| Aug 20, 7:15 PM EDT | Mesoscale Discussion | SPC | Cambria, Clearfield, Indiana, Somerset, Westmoreland | 90 min |
| Aug 20, 7:30 PM EDT | Flash Flood Warning | CTP | Union | 6 hr |
| Aug 20, 7:30 PM EDT | Severe Thunderstorm Warning | CTP | Franklin | 60 min |
| Aug 20, 8:22 PM EDT | Mesoscale Discussion | SPC | Bradford, Carbon, Centre, Clinton, Columbia, Cumberland and 24 more | 83 min |
| Aug 21, 11:48 AM EDT | Mesoscale Discussion | SPC | Berks, Bucks, Chester, Delaware, Lancaster, Lehigh and 4 more | 117 min |
| Aug 21, 12:55 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Montgomery | 50 min |
| Aug 21, 1:15 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 30 min |
| Aug 21, 1:25 PM EDT | Severe Thunderstorm Watch | SPC | Bucks, Delaware, Philadelphia | 5 hr |
| Aug 21, 2:55 PM EDT | Flash Flood Warning | CTP | Lancaster | 4 hr |
| Aug 21, 3:08 PM EDT | Mesoscale Discussion | SPC | Bucks, Delaware, Philadelphia | 2 hr |
| Aug 21, 4:35 PM EDT | Mesoscale Discussion | SPC | Bucks, Delaware, Philadelphia | 85 min |
| Aug 21, 5:14 PM EDT | Special Marine Warning | PHI | 76 min | |
| Aug 21, 5:14 PM EDT | Special Marine Warning | PHI | 76 min | |
| Aug 27, 5:55 PM EDT | Severe Thunderstorm Warning | PBZ | Mercer | 65 min |
| Aug 27, 9:14 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver | 61 min |
| Aug 28, 10:08 AM EDT | Flash Flood Warning | PBZ | Lawrence | 3 hr |
| Aug 28, 12:07 PM EDT | Flash Flood Warning | PBZ | Allegheny | 3 hr |
| Aug 28, 1:25 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana | 35 min |
| Aug 28, 8:13 PM EDT | Flash Flood Warning | CTP | Bedford | 6 hr |
| Aug 29, 2:46 PM EDT | Severe Thunderstorm Warning | CTP | Centre | 44 min |
| Aug 29, 3:46 PM EDT | Severe Thunderstorm Warning | CTP | Cambria | 59 min |
| Aug 29, 4:29 PM EDT | Severe Thunderstorm Warning | CTP | Centre | 61 min |
| Aug 29, 8:36 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 54 min |
| Aug 29, 9:15 PM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 60 min |
| Aug 30, 2:05 PM EDT | Flash Flood Warning | CTP | Tioga | 6 hr |
| Aug 30, 6:54 PM EDT | Flash Flood Warning | BGM | Pike | 4 hr |
| Aug 30, 7:26 PM EDT | Flash Flood Warning | BGM | Lackawanna | 3 hr |
| Aug 30, 7:46 PM EDT | Flash Flood Warning | PHI | Chester, Montgomery | 119 min |
| Aug 30, 8:30 PM EDT | Flash Flood Warning | BGM | Susquehanna, Wyoming | 4 hr |
| Aug 31, 12:20 AM EDT | Flash Flood Warning | BGM | Susquehanna, Wyoming | 4 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
| Product | Alerts |
|---|---|
| Severe storms | |
| Severe Thunderstorm Warning | 123 |
| Tornado Warning | 15 |
| Severe Thunderstorm Watch | 11 |
| Mesoscale Discussion | 24 |
| Flooding | |
| Flash Flood Warning | 43 |
| Marine | |
| Special Marine Warning | 5 |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Westmoreland County23
- Lancaster County20
- Allegheny County18
- Philadelphia County17
- Indiana County17
- Centre County17
- York County16
- Montgomery County16
- Bucks County16
- Chester County16
- Delaware County16
- Beaver County15
- Washington County15
- Cambria County15
- Fayette County14
- Clearfield County14
- Monroe County13
- Schuylkill County13
- Northampton County13
- Pike County13
- Dauphin County12
- Susquehanna County12
- Wyoming County12
- Cumberland County11
- Armstrong County11
- Juniata County11
- Perry County11
- Somerset County11
- Berks County11
- Lehigh County11
- Tioga County11
- Greene County10
- Franklin County10
- Huntingdon County10
- Mifflin County10
- Carbon County10
- Union County10
- Lycoming County10
- Sullivan County10
- Lackawanna County10
27 more counties
- Butler County9
- Adams County9
- Clinton County9
- Bradford County9
- Wayne County9
- Bedford County8
- Blair County8
- Fulton County8
- Columbia County8
- Lebanon County8
- Luzerne County8
- Montour County8
- Northumberland County8
- Snyder County8
- Potter County8
- Lawrence County7
- Venango County7
- Clarion County6
- Jefferson County6
- Mercer County6
- Cameron County6
- Elk County6
- McKean County6
- Warren County4
- Forest County3
- Crawford County3
- Erie County2
Nearby
Alerts in force nowTornadoes on recordThe radar archive20032005
Sources
National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Rebuilt daily.