Alert archive / Pennsylvania / Mesoscale Discussions / 2011
Mesoscale Discussions in Pennsylvania, August 2011
25 mesoscale discussions in August 2011. 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 August 2011. Tap one for its archive.
- Mesoscale Discussions
- 25
- Busiest day
- August 1, 20117 mesoscale discussions
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 |
|---|---|---|---|---|
| Aug 1, 3:47 AM EDT | Mesoscale Discussion | SPC | Crawford, Erie, Warren | 58 min |
| Aug 1, 8:01 AM EDT | Mesoscale Discussion | SPC | Bradford, Cameron, Clarion, Crawford, Elk, Erie and 7 more | 89 min |
| Aug 1, 12:07 PM EDT | Mesoscale Discussion | SPC | Bradford, Cameron, Lackawanna, Lycoming, McKean, Potter and 5 more | 53 min |
| Aug 1, 1:06 PM EDT | Mesoscale Discussion | SPC | Beaver, Lawrence | 24 min |
| Aug 1, 2:15 PM EDT | Mesoscale Discussion | SPC | Carbon, Columbia, Lackawanna, Lehigh, Luzerne, Monroe and 8 more | 90 min |
| Aug 1, 3:22 PM EDT | Mesoscale Discussion | SPC | Adams, Bedford, Berks, Bucks, Chester, Cumberland and 19 more | 83 min |
| Aug 1, 6:18 PM EDT | Mesoscale Discussion | SPC | Bucks, Chester, Delaware, Montgomery, Philadelphia | 57 min |
| Aug 7, 3:53 PM EDT | Mesoscale Discussion | SPC | Adams, Berks, Blair, Bradford, Carbon, Centre and 25 more | 67 min |
| Aug 7, 7:36 PM EDT | Mesoscale Discussion | SPC | Greene | 84 min |
| Aug 9, 12:48 PM EDT | Mesoscale Discussion | SPC | Bucks, Chester, Delaware, Montgomery, Philadelphia | 57 min |
| Aug 9, 3:05 PM EDT | Mesoscale Discussion | SPC | Adams, Berks, Bradford, Bucks, Carbon, Centre and 31 more | 55 min |
| Aug 9, 7:07 PM EDT | Mesoscale Discussion | SPC | Bucks, Carbon, Chester, Delaware, Lackawanna, Lehigh and 6 more | 83 min |
| Aug 9, 8:31 PM EDT | Mesoscale Discussion | SPC | Beaver, Crawford, Lawrence, Mercer, Venango | 89 min |
| Aug 13, 2:07 PM EDT | Mesoscale Discussion | SPC | Adams, Bedford, Berks, Blair, Centre, Chester and 20 more | 113 min |
| Aug 18, 6:39 PM EDT | Mesoscale Discussion | SPC | Bucks, Chester, Delaware, Montgomery, Philadelphia | 96 min |
| Aug 19, 12:43 PM EDT | Mesoscale Discussion | SPC | Adams, Berks, Blair, Bucks, Carbon, Chester and 31 more | 62 min |
| Aug 19, 6:42 PM EDT | Mesoscale Discussion | SPC | Bucks, Chester, Delaware, Montgomery, Philadelphia | 63 min |
| Aug 19, 7:44 PM EDT | Mesoscale Discussion | SPC | Delaware, Philadelphia | 61 min |
| Aug 20, 4:37 PM EDT | Mesoscale Discussion | SPC | Erie | 83 min |
| Aug 21, 11:54 AM EDT | Mesoscale Discussion | SPC | Adams, Bedford, Berks, Bucks, Carbon, Chester and 24 more | 2 hr |
| Aug 21, 7:12 PM EDT | Mesoscale Discussion | SPC | Adams, Berks, Bucks, Carbon, Chester, Columbia and 23 more | 63 min |
| Aug 24, 11:48 PM EDT | Mesoscale Discussion | SPC | Allegheny, Armstrong, Beaver, Butler, Cameron, Clarion and 17 more | 87 min |
| Aug 25, 2:31 AM EDT | Mesoscale Discussion | SPC | Allegheny, Armstrong, Beaver, Blair, Bradford, Butler and 20 more | 119 min |
| Aug 27, 7:31 PM EDT | Mesoscale Discussion | SPC | Bucks, Chester, Delaware, Montgomery, Philadelphia | 89 min |
| Aug 28, 12:30 AM EDT | Mesoscale Discussion | SPC | Bucks, Delaware, Montgomery, Northampton, Philadelphia | 90 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Delaware County13
- Philadelphia County13
- Bucks County12
- Chester County12
- Montgomery County12
- Lackawanna County8
- Wayne County8
- Northampton County8
- Northumberland County8
- Schuylkill County8
- Snyder County8
- Carbon County7
- Columbia County7
- Lehigh County7
- Monroe County7
- Pike County7
- Adams County7
- Berks County7
- Cumberland County7
- Dauphin County7
- Franklin County7
- Lebanon County7
- Perry County7
- Lycoming County6
- Luzerne County6
- Montour County6
- Huntingdon County6
- Juniata County6
- Lancaster County6
- York County6
- Bradford County5
- Sullivan County5
- Susquehanna County5
- Wyoming County5
- Union County5
- Fulton County5
- Mifflin County5
- Crawford County4
- Erie County4
- Warren County4
26 more counties
- Cameron County4
- McKean County4
- Potter County4
- Tioga County4
- Venango County4
- Beaver County4
- Lawrence County4
- Blair County4
- Centre County4
- Clinton County4
- Clarion County3
- Elk County3
- Forest County3
- Mercer County3
- Bedford County3
- Greene County2
- Allegheny County2
- Armstrong County2
- Butler County2
- Clearfield County2
- Indiana County2
- Jefferson County2
- Washington County2
- Westmoreland County2
- Somerset County1
- Cambria County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20102012
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.