Alert archive / Pennsylvania / Mesoscale Discussions / 2004
Mesoscale Discussions in Pennsylvania, August 2004
24 mesoscale discussions in August 2004. 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 2004. Tap one for its archive.
- Mesoscale Discussions
- 24
- Busiest day
- August 20, 20045 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 4, 10:39 AM EDT | Mesoscale Discussion | SPC | Allegheny, Beaver, Fayette, Greene, Washington, Westmoreland | 2 hr |
| Aug 4, 2:31 PM EDT | Mesoscale Discussion | SPC | Allegheny, Bedford, Blair, Cambria, Centre, Clearfield and 13 more | 119 min |
| Aug 4, 5:48 PM EDT | Mesoscale Discussion | SPC | Adams, Berks, Bucks, Carbon, Chester, Cumberland and 11 more | 117 min |
| Aug 10, 11:54 AM EDT | Mesoscale Discussion | SPC | Allegheny, Armstrong, Bedford, Blair, Butler, Cambria and 24 more | 96 min |
| Aug 10, 4:16 PM EDT | Mesoscale Discussion | SPC | Allegheny, Armstrong, Beaver, Bradford, Butler, Cameron and 21 more | 89 min |
| Aug 10, 7:27 PM EDT | Mesoscale Discussion | SPC | Bradford, Centre, Clearfield, Clinton, Lycoming, Sullivan and 3 more | 93 min |
| Aug 11, 11:59 AM EDT | Mesoscale Discussion | SPC | Bucks, Chester, Delaware, Lehigh, Monroe, Montgomery and 4 more | 91 min |
| Aug 11, 7:00 PM EDT | Mesoscale Discussion | SPC | Berks, Bucks, Carbon, Chester, Delaware, Lancaster and 8 more | 90 min |
| Aug 12, 12:00 PM EDT | Mesoscale Discussion | SPC | Bucks, Carbon, Lackawanna, Lehigh, Monroe, Montgomery and 5 more | 90 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 19, 1:41 PM EDT | Mesoscale Discussion | SPC | Allegheny, Beaver, Fayette, Greene, Indiana, Washington and 1 more | 64 min |
| Aug 19, 5:02 PM EDT | Mesoscale Discussion | SPC | Adams, Allegheny, Armstrong, Beaver, Bedford, Blair and 16 more | 88 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, 3:41 PM EDT | Mesoscale Discussion | SPC | Blair, Bradford, Cambria, Cameron, Carbon, Centre and 27 more | 2 hr |
| Aug 20, 4:03 PM EDT | Mesoscale Discussion | SPC | Adams, Bedford, Berks, Cumberland, Franklin, Fulton and 4 more | 2 hr |
| Aug 20, 7:15 PM EDT | Mesoscale Discussion | SPC | Cambria, Clearfield, Indiana, Somerset, Westmoreland | 90 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, 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 |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Westmoreland County8
- Bucks County8
- Lehigh County8
- Northampton County8
- Philadelphia County8
- Allegheny County7
- Washington County7
- Centre County7
- Delaware County7
- Clearfield County6
- Indiana County6
- Monroe County6
- Montgomery County6
- Clinton County6
- Tioga County6
- Pike County6
- Beaver County5
- Fayette County5
- Greene County5
- Cambria County5
- Cumberland County5
- Franklin County5
- Huntingdon County5
- Juniata County5
- Mifflin County5
- Somerset County5
- Carbon County5
- Chester County5
- Lancaster County5
- York County5
- Bradford County5
- Lycoming County5
- Sullivan County5
- Susquehanna County5
- Wyoming County5
- Wayne County5
- Bedford County4
- Blair County4
- Fulton County4
- Perry County4
27 more counties
- Adams County4
- Berks County4
- Dauphin County4
- Lebanon County4
- Schuylkill County4
- Potter County4
- Lackawanna County4
- Armstrong County3
- Cameron County3
- Elk County3
- Venango County3
- Mercer County3
- Columbia County3
- Luzerne County3
- Montour County3
- Union County3
- Butler County2
- Clarion County2
- Forest County2
- Jefferson County2
- McKean County2
- Warren County2
- Lawrence County2
- Crawford County2
- Northumberland County2
- Snyder County2
- Erie County1
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. Warning verification from the Mesonet's Cow. Rebuilt daily.