Alert archive / Pennsylvania / Mesoscale Discussions
Mesoscale Discussions in Pennsylvania, 2007
131 mesoscale discussions in 2007. 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 mesoscale discussions reaches back to 2003.
Mesoscale Discussions by county
Each county as a circle sized by its count in 2007. Tap one for its archive.
- Mesoscale Discussions
- 131
- Busiest month
- June26 mesoscale discussions
- Busiest day
- February 14, 20077 mesoscale discussions
Over time
By month
The alerts
Every alert, in the order issued. Times are local, Eastern Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 25, 11:27 AM EST | Mesoscale Discussion | SPC | Crawford, Erie | 6 hr |
| Feb 4, 7:35 PM EST | Mesoscale Discussion | SPC | Erie | 5 hr |
| Feb 13, 1:51 PM EST | Mesoscale Discussion | SPC | Allegheny, Armstrong, Beaver, Butler, Clarion, Crawford and 7 more | 6 hr |
| Feb 13, 2:32 PM EST | Mesoscale Discussion | SPC | Greene, Washington | 6 hr |
| Feb 13, 8:08 PM EST | Mesoscale Discussion | SPC | Bradford, Butler, Cameron, Clarion, Clearfield, Clinton and 16 more | 5 hr |
| Feb 13, 8:52 PM EST | Mesoscale Discussion | SPC | Allegheny, Fayette, Greene, Somerset, Washington, Westmoreland | 5 hr |
| Feb 14, 2:03 AM EST | Mesoscale Discussion | SPC | Adams, Bedford, Berks, Blair, Bucks, Carbon and 29 more | 5 hr |
| Feb 14, 2:04 AM EST | Mesoscale Discussion | SPC | Adams, Bedford, Berks, Blair, Bucks, Carbon and 29 more | 5 hr |
| Feb 14, 2:49 AM EST | Mesoscale Discussion | SPC | Adams, Berks, Bucks, Carbon, Centre, Chester and 27 more | 5 hr |
| Feb 14, 7:34 AM EST | Mesoscale Discussion | SPC | Berks, Bradford, Bucks, Carbon, Columbia, Delaware and 14 more | 4 hr |
| Feb 14, 1:15 PM EST | Mesoscale Discussion | SPC | Lackawanna, Pike, Susquehanna, Wayne, Wyoming | 6 hr |
| Feb 25, 12:51 AM EST | Mesoscale Discussion | SPC | Allegheny, Beaver, Bedford, Butler, Fayette, Greene and 4 more | 4 hr |
| Feb 25, 7:09 AM EST | Mesoscale Discussion | SPC | Adams, Bedford, Franklin, Fulton, Somerset | 4 hr |
| Feb 25, 1:39 PM EST | Mesoscale Discussion | SPC | Berks, Chester, Dauphin, Delaware, Lancaster, Lebanon and 3 more | 4 hr |
| Mar 16, 8:46 AM EDT | Mesoscale Discussion | SPC | Adams, Bedford, Berks, Blair, Bradford, Bucks and 45 more | 4 hr |
| Mar 16, 2:28 PM EDT | Mesoscale Discussion | SPC | Adams, Bedford, Berks, Blair, Bradford, Carbon and 33 more | 6 hr |
| Mar 16, 9:14 PM EDT | Mesoscale Discussion | SPC | Adams, Berks, Bradford, Bucks, Carbon, Chester and 21 more | 4 hr |
| Mar 22, 12:24 PM EDT | Mesoscale Discussion | SPC | Fayette, Greene | 2 hr |
| Mar 27, 2:16 PM EDT | Mesoscale Discussion | SPC | Allegheny, Armstrong, Beaver, Bedford, Blair, Butler and 27 more | 2 hr |
| Apr 1, 3:06 PM EDT | Mesoscale Discussion | SPC | Beaver, Crawford, Lawrence, Mercer | 84 min |
| Apr 1, 9:02 PM EDT | Mesoscale Discussion | SPC | Allegheny, Armstrong, Beaver, Butler, Cambria, Clarion and 14 more | 118 min |
| Apr 16, 3:55 AM EDT | Mesoscale Discussion | SPC | Bradford | 3 hr |
| Apr 23, 5:03 PM EDT | Mesoscale Discussion | SPC | Crawford, Warren | 2 hr |
| Apr 23, 8:38 PM EDT | Mesoscale Discussion | SPC | Allegheny, Armstrong, Beaver, Blair, Bradford, Butler and 17 more | 2 hr |
| Apr 26, 3:26 PM EDT | Mesoscale Discussion | SPC | Allegheny, Armstrong, Beaver, Butler, Crawford, Fayette and 6 more | 64 min |
| May 1, 3:53 PM EDT | Mesoscale Discussion | SPC | Allegheny, Armstrong, Beaver, Butler, Clarion, Indiana and 4 more | 97 min |
| May 1, 6:35 PM EDT | Mesoscale Discussion | SPC | Allegheny, Armstrong, Beaver, Bedford, Blair, Butler and 37 more | 85 min |
| May 10, 11:48 AM EDT | Mesoscale Discussion | SPC | Bradford, Centre, Clinton, Columbia, Cumberland, Dauphin and 17 more | 117 min |
| May 10, 6:28 PM EDT | Mesoscale Discussion | SPC | Adams, Bedford, Berks, Bradford, Bucks, Carbon and 32 more | 92 min |
| May 16, 12:46 AM EDT | Mesoscale Discussion | SPC | Allegheny, Beaver, Butler, Lawrence, Washington | 59 min |
| May 16, 11:57 AM EDT | Mesoscale Discussion | SPC | Monroe, Pike, Wayne | 93 min |
| May 16, 12:56 PM EDT | Mesoscale Discussion | SPC | Adams, Berks, Bucks, Carbon, Chester, Cumberland and 12 more | 64 min |
| May 16, 3:46 PM EDT | Mesoscale Discussion | SPC | Adams, Berks, Bucks, Carbon, Chester, Delaware and 10 more | 89 min |
| May 25, 1:18 PM EDT | Mesoscale Discussion | SPC | Allegheny, Armstrong, Beaver, Butler, Cameron, Clarion and 12 more | 2 hr |
| May 27, 12:45 PM EDT | Mesoscale Discussion | SPC | Allegheny, Armstrong, Beaver, Butler, Clarion, Fayette and 10 more | 90 min |
| May 27, 1:12 PM EDT | Mesoscale Discussion | SPC | Bradford, Cameron, Centre, Clearfield, Clinton, Elk and 12 more | 93 min |
| May 27, 4:30 PM EDT | Mesoscale Discussion | SPC | Adams, Cumberland, Dauphin, Franklin, Juniata, Perry and 1 more | 60 min |
| May 27, 6:56 PM EDT | Mesoscale Discussion | SPC | Adams, Allegheny, Armstrong, Beaver, Bedford, Berks and 49 more | 2 hr |
| May 31, 2:01 PM EDT | Mesoscale Discussion | SPC | Adams, Fulton, York | 89 min |
| Jun 1, 4:09 PM EDT | Mesoscale Discussion | SPC | Bucks, Northampton | 96 min |
| Jun 8, 2:08 PM EDT | Mesoscale Discussion | SPC | Armstrong, Butler, Cameron, Clarion, Clearfield, Crawford and 10 more | 97 min |
| Jun 8, 3:06 PM EDT | Mesoscale Discussion | SPC | Allegheny, Beaver, Fayette, Greene, Washington, Westmoreland | 54 min |
| Jun 8, 4:12 PM EDT | Mesoscale Discussion | SPC | Adams, Bedford, Berks, Carbon, Chester, Columbia and 20 more | 93 min |
| Jun 8, 7:48 PM EDT | Mesoscale Discussion | SPC | Adams, Berks, Bradford, Cameron, Carbon, Centre and 30 more | 117 min |
| Jun 12, 12:29 PM EDT | Mesoscale Discussion | SPC | Adams, Berks, Bucks, Carbon, Chester, Columbia and 20 more | 31 min |
| Jun 12, 4:23 PM EDT | Mesoscale Discussion | SPC | Adams, Berks, Bradford, Bucks, Carbon, Chester and 30 more | 67 min |
| Jun 12, 7:02 PM EDT | Mesoscale Discussion | SPC | Bedford, Blair, Cambria, Centre, Clearfield, Clinton and 6 more | 58 min |
| Jun 13, 11:54 AM EDT | Mesoscale Discussion | SPC | Allegheny, Armstrong, Beaver, Bedford, Blair, Butler and 37 more | 66 min |
| Jun 13, 3:13 PM EDT | Mesoscale Discussion | SPC | Adams, Allegheny, Armstrong, Beaver, Bedford, Berks and 47 more | 92 min |
| Jun 13, 7:30 PM EDT | Mesoscale Discussion | SPC | Fayette, Greene | 90 min |
| Jun 14, 12:24 PM EDT | Mesoscale Discussion | SPC | Greene | 2 hr |
| Jun 16, 1:50 PM EDT | Mesoscale Discussion | SPC | Berks, Bradford, Bucks, Carbon, Chester, Columbia and 26 more | 115 min |
| Jun 19, 12:01 PM EDT | Mesoscale Discussion | SPC | Allegheny, Armstrong, Beaver, Bedford, Blair, Bradford and 31 more | 29 min |
| Jun 19, 2:15 PM EDT | Mesoscale Discussion | SPC | Adams, Allegheny, Bedford, Berks, Blair, Bucks and 34 more | 30 min |
| Jun 19, 3:03 PM EDT | Mesoscale Discussion | SPC | Allegheny, Armstrong, Beaver, Bradford, Butler, Cameron and 31 more | 27 min |
| Jun 19, 7:38 PM EDT | Mesoscale Discussion | SPC | Adams, Bedford, Berks, Blair, Bradford, Cambria and 38 more | 67 min |
| Jun 21, 1:25 PM EDT | Mesoscale Discussion | SPC | Bradford, Lackawanna, Luzerne, Lycoming, Monroe, Pike and 5 more | 95 min |
| Jun 21, 2:12 PM EDT | Mesoscale Discussion | SPC | Allegheny, Armstrong, Beaver, Butler, Fayette, Indiana and 5 more | 93 min |
| Jun 21, 5:58 PM EDT | Mesoscale Discussion | SPC | Lackawanna, Monroe, Northampton, Pike, Susquehanna, Wayne | 62 min |
| Jun 21, 8:28 PM EDT | Mesoscale Discussion | SPC | Bucks, Lehigh, Northampton | 62 min |
| Jun 27, 11:44 AM EDT | Mesoscale Discussion | SPC | Allegheny, Armstrong, Beaver, Blair, Bradford, Butler and 24 more | 2 hr |
| Jun 27, 10:03 PM EDT | Mesoscale Discussion | SPC | Berks, Bucks, Chester, Delaware, Lancaster, Lehigh and 4 more | 57 min |
| Jun 28, 12:52 PM EDT | Mesoscale Discussion | SPC | Adams, Allegheny, Armstrong, Beaver, Bedford, Berks and 46 more | 83 min |
| Jun 28, 4:04 PM EDT | Mesoscale Discussion | SPC | Carbon, Columbia, Lehigh, Luzerne, Monroe, Northampton and 1 more | 86 min |
| Jun 28, 7:30 PM EDT | Mesoscale Discussion | SPC | Adams, Bedford, Berks, Bucks, Chester, Cumberland and 7 more | 60 min |
| Jul 4, 1:27 PM EDT | Mesoscale Discussion | SPC | Greene | 63 min |
| Jul 4, 4:13 PM EDT | Mesoscale Discussion | SPC | Adams, Bedford, Berks, Bucks, Carbon, Chester and 21 more | 62 min |
| Jul 5, 11:40 AM EDT | Mesoscale Discussion | SPC | Allegheny, Bedford, Blair, Cambria, Fayette, Fulton and 6 more | 2 hr |
| Jul 5, 12:17 PM EDT | Mesoscale Discussion | SPC | McKean, Warren | 118 min |
| Jul 9, 1:25 PM EDT | Mesoscale Discussion | SPC | McKean | 95 min |
| Jul 11, 1:59 PM EDT | Mesoscale Discussion | SPC | Adams, Berks, Bradford, Bucks, Carbon, Centre and 33 more | 91 min |
| Jul 13, 2:32 PM EDT | Mesoscale Discussion | SPC | Fayette, Greene, Washington, Westmoreland | 58 min |
| Jul 15, 10:40 AM EDT | Mesoscale Discussion | SPC | Pike | 2 hr |
| Jul 15, 11:17 AM EDT | Mesoscale Discussion | SPC | Bradford, Susquehanna, Tioga | 58 min |
| Jul 15, 1:21 PM EDT | Mesoscale Discussion | SPC | Allegheny, Bedford, Blair, Cambria, Centre, Clearfield and 16 more | 84 min |
| Jul 16, 7:53 PM EDT | Mesoscale Discussion | SPC | Chester, Lancaster, York | 97 min |
| Jul 18, 1:56 PM EDT | Mesoscale Discussion | SPC | Adams, Berks, Bucks, Chester, Cumberland, Dauphin and 13 more | 64 min |
| Jul 19, 4:32 PM EDT | Mesoscale Discussion | SPC | Crawford, Erie, Forest, McKean, Warren | 88 min |
| Jul 19, 6:27 PM EDT | Mesoscale Discussion | SPC | Adams, Berks, Bucks, Carbon, Chester, Delaware and 8 more | 93 min |
| Jul 19, 7:15 PM EDT | Mesoscale Discussion | SPC | Crawford, Erie, Lawrence, Mercer | 90 min |
| Jul 24, 12:37 PM EDT | Mesoscale Discussion | SPC | Greene, Washington | 83 min |
| Jul 25, 1:03 PM EDT | Mesoscale Discussion | SPC | Allegheny, Armstrong, Beaver, Butler, Clarion, Fayette and 6 more | 87 min |
| Jul 26, 1:35 PM EDT | Mesoscale Discussion | SPC | Allegheny, Armstrong, Beaver, Butler, Fayette, Greene and 3 more | 115 min |
| Jul 26, 4:45 PM EDT | Mesoscale Discussion | SPC | Allegheny, Armstrong, Beaver, Butler, Clarion, Crawford and 9 more | 90 min |
| Jul 27, 12:09 PM EDT | Mesoscale Discussion | SPC | Adams, Bedford, Berks, Blair, Bradford, Carbon and 31 more | 96 min |
| Jul 27, 3:16 PM EDT | Mesoscale Discussion | SPC | Adams, Bedford, Blair, Bradford, Cambria, Cameron and 30 more | 89 min |
| Jul 27, 6:04 PM EDT | Mesoscale Discussion | SPC | Bucks, Chester, Delaware, Montgomery, Northampton, Philadelphia and 1 more | 86 min |
| Jul 29, 12:15 PM EDT | Mesoscale Discussion | SPC | Delaware, Philadelphia | 2 hr |
| Aug 3, 3:33 PM EDT | Mesoscale Discussion | SPC | Berks, Bucks, Chester, Delaware, Lancaster, Lehigh and 4 more | 87 min |
| Aug 3, 6:01 PM EDT | Mesoscale Discussion | SPC | Bradford, Cameron, Clinton, Columbia, Lackawanna, Luzerne and 11 more | 59 min |
| Aug 7, 10:27 AM EDT | Mesoscale Discussion | SPC | Allegheny, Armstrong, Beaver, Bedford, Blair, Butler and 10 more | 2 hr |
| Aug 8, 2:34 AM EDT | Mesoscale Discussion | SPC | Bedford, Berks, Blair, Bucks, Carbon, Cumberland and 12 more | 86 min |
| Aug 8, 1:14 PM EDT | Mesoscale Discussion | SPC | Beaver, Fayette, Greene, Washington | 91 min |
| Aug 8, 6:23 PM EDT | Mesoscale Discussion | SPC | Fayette, Greene | 67 min |
| Aug 9, 8:47 AM EDT | Mesoscale Discussion | SPC | Adams, Bedford, Cumberland, Franklin, Fulton, Huntingdon and 1 more | 58 min |
| Aug 9, 11:54 AM EDT | Mesoscale Discussion | SPC | Allegheny, Beaver, Butler, Fayette, Greene, Lawrence and 3 more | 2 hr |
| Aug 9, 2:41 PM EDT | Mesoscale Discussion | SPC | Bedford, Cambria, Fayette, Franklin, Fulton, Indiana and 2 more | 94 min |
| Aug 9, 5:03 PM EDT | Mesoscale Discussion | SPC | Allegheny, Armstrong, Beaver, Butler, Fayette, Greene and 4 more | 87 min |
| Aug 9, 7:23 PM EDT | Mesoscale Discussion | SPC | Adams, Allegheny, Armstrong, Beaver, Bedford, Berks and 49 more | 67 min |
| Aug 17, 1:13 PM EDT | Mesoscale Discussion | SPC | Adams, Berks, Bucks, Carbon, Chester, Columbia and 21 more | 92 min |
| Aug 17, 3:41 PM EDT | Mesoscale Discussion | SPC | Berks, Bucks, Carbon, Chester, Columbia, Delaware and 8 more | 94 min |
| Aug 20, 12:18 PM EDT | Mesoscale Discussion | SPC | Greene, Washington | 117 min |
| Aug 20, 4:24 PM EDT | Mesoscale Discussion | SPC | Allegheny, Beaver, Fayette, Greene, Washington, Westmoreland | 66 min |
| Aug 20, 7:11 PM EDT | Mesoscale Discussion | SPC | Adams, Bedford, Franklin, Fulton, Somerset, York | 94 min |
| Aug 23, 11:17 AM EDT | Mesoscale Discussion | SPC | Allegheny, Armstrong, Beaver, Butler, Cameron, Clarion and 12 more | 88 min |
| Aug 23, 5:30 PM EDT | Mesoscale Discussion | SPC | Allegheny, Armstrong, Beaver, Bedford, Blair, Butler and 15 more | 60 min |
| Aug 24, 4:13 PM EDT | Mesoscale Discussion | SPC | Bradford, Cameron, Clarion, Clearfield, Clinton, Crawford and 9 more | 92 min |
| Aug 25, 2:57 PM EDT | Mesoscale Discussion | SPC | Allegheny, Armstrong, Beaver, Butler, Clarion, Clearfield and 13 more | 93 min |
| Aug 25, 9:11 PM EDT | Mesoscale Discussion | SPC | Adams, Bedford, Blair, Cambria, Centre, Clearfield and 15 more | 94 min |
| Aug 30, 2:20 PM EDT | Mesoscale Discussion | SPC | Allegheny, Armstrong, Bedford, Blair, Bradford, Cambria and 26 more | 115 min |
| Sep 11, 4:58 AM EDT | Mesoscale Discussion | SPC | Erie | 3 hr |
| Sep 11, 7:11 PM EDT | Mesoscale Discussion | SPC | Susquehanna, Wayne, Wyoming | 64 min |
| Sep 26, 12:36 PM EDT | Mesoscale Discussion | SPC | Armstrong, Bradford, Cameron, Clarion, Clearfield, Clinton and 11 more | 84 min |
| Sep 27, 12:43 PM EDT | Mesoscale Discussion | SPC | Bradford, Carbon, Columbia, Lackawanna, Luzerne, Lycoming and 11 more | 2 hr |
| Sep 27, 1:00 PM EDT | Mesoscale Discussion | SPC | Adams, Bedford, Cumberland, Franklin, Fulton, Huntingdon and 2 more | 2 hr |
| Sep 27, 7:01 PM EDT | Mesoscale Discussion | SPC | Adams, Bradford, Carbon, Columbia, Cumberland, Dauphin and 18 more | 89 min |
| Sep 28, 11:28 AM EDT | Mesoscale Discussion | SPC | Bradford, Lackawanna, Potter, Sullivan, Susquehanna, Tioga and 2 more | 2 hr |
| Oct 8, 4:51 PM EDT | Mesoscale Discussion | SPC | Lackawanna, Pike, Susquehanna, Wayne | 114 min |
| Oct 19, 6:05 PM EDT | Mesoscale Discussion | SPC | Adams, Berks, Carbon, Chester, Columbia, Cumberland and 15 more | 55 min |
| Dec 2, 7:54 PM EST | Mesoscale Discussion | SPC | Susquehanna, Wayne | 3 hr |
| Dec 3, 12:15 AM EST | Mesoscale Discussion | SPC | Pike, Wayne | 4 hr |
| Dec 8, 6:56 PM EST | Mesoscale Discussion | SPC | Butler, Clarion, Lawrence, Mercer | 5 hr |
| Dec 9, 2:51 PM EST | Mesoscale Discussion | SPC | Bradford, Cameron, Elk, Forest, Lackawanna, Lycoming and 8 more | 4 hr |
| Dec 9, 7:03 PM EST | Mesoscale Discussion | SPC | Bradford, Lackawanna, Luzerne, Lycoming, Pike, Potter and 5 more | 4 hr |
| Dec 13, 1:47 AM EST | Mesoscale Discussion | SPC | Allegheny, Armstrong, Beaver, Bedford, Blair, Butler and 12 more | 5 hr |
| Dec 13, 7:57 AM EST | Mesoscale Discussion | SPC | Berks, Blair, Bradford, Cameron, Carbon, Centre and 32 more | 4 hr |
| Dec 13, 12:30 PM EST | Mesoscale Discussion | SPC | Berks, Blair, Bradford, Bucks, Cameron, Carbon and 33 more | 4 hr |
| Dec 15, 7:43 PM EST | Mesoscale Discussion | SPC | Adams, Allegheny, Armstrong, Beaver, Bedford, Blair and 43 more | 6 hr |
| Dec 16, 2:21 AM EST | Mesoscale Discussion | SPC | Bedford, Berks, Blair, Bradford, Cambria, Cameron and 34 more | 5 hr |
| Dec 23, 2:11 PM EST | Mesoscale Discussion | SPC | Adams, Berks, Bradford, Bucks, Carbon, Centre and 34 more | 94 min |
| Dec 30, 10:09 PM EST | Mesoscale Discussion | SPC | Bradford, Columbia, Lackawanna, Luzerne, Monroe, Pike and 4 more | 3 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Cumberland County41
- Wayne County41
- Dauphin County40
- Monroe County40
- Northampton County40
- Washington County39
- Susquehanna County39
- Columbia County39
- Perry County39
- Pike County39
- York County39
- Allegheny County38
- Greene County38
- Bradford County38
- Adams County38
- Berks County38
- Juniata County38
- Lehigh County38
- Montour County38
- Schuylkill County38
- Lycoming County37
- Fayette County37
- Bedford County37
- Franklin County37
- Huntingdon County37
- Lackawanna County37
- Lebanon County37
- Luzerne County37
- Sullivan County36
- Wyoming County36
- Westmoreland County36
- Carbon County36
- Lancaster County36
- Mifflin County36
- Beaver County35
- Tioga County35
- Fulton County35
- Snyder County35
- Union County35
- Butler County34
27 more counties
- Northumberland County34
- Centre County33
- Indiana County32
- Lawrence County32
- Clearfield County32
- Clinton County32
- Chester County32
- Armstrong County31
- Blair County31
- Bucks County31
- Montgomery County31
- Potter County30
- Somerset County30
- Delaware County30
- Jefferson County29
- Mercer County29
- Clarion County27
- Cameron County27
- Philadelphia County27
- Venango County26
- Cambria County26
- Crawford County24
- Forest County24
- Elk County24
- McKean County24
- Warren County22
- Erie County12
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20062008
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.