Alert archive / Pennsylvania / Mesoscale Discussions / 2018
Mesoscale Discussions in Pennsylvania, September 2018
6 mesoscale discussions in September 2018. 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 September 2018. Tap one for its archive.
- Mesoscale Discussions
- 6
- Busiest day
- September 21, 20182 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 |
|---|---|---|---|---|
| Sep 6, 1:20 PM EDT | Mesoscale Discussion | SPC | Blair, Bradford, Cambria, Carbon, Centre, Clearfield and 21 more | 2 hr |
| Sep 21, 3:37 PM EDT | Mesoscale Discussion | SPC | Crawford, Erie, Lawrence, Mercer, Venango | 83 min |
| Sep 21, 7:04 PM EDT | Mesoscale Discussion | SPC | Allegheny, Armstrong, Beaver, Blair, Bradford, Butler and 21 more | 116 min |
| Sep 25, 5:38 PM EDT | Mesoscale Discussion | SPC | Philadelphia | 2 hr |
| Sep 26, 2:48 PM EDT | Mesoscale Discussion | SPC | Bradford, Carbon, Centre, Clinton, Columbia, Juniata and 18 more | 2 hr |
| Sep 26, 3:40 PM EDT | Mesoscale Discussion | SPC | Adams, Bedford, Bucks, Chester, Cumberland, Dauphin and 9 more | 3 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Bradford County3
- Centre County3
- Clinton County3
- Lycoming County3
- Tioga County3
- Blair County2
- Cambria County2
- Carbon County2
- Clearfield County2
- Columbia County2
- Indiana County2
- Juniata County2
- Lackawanna County2
- Luzerne County2
- Mifflin County2
- Monroe County2
- Montour County2
- Northumberland County2
- Pike County2
- Schuylkill County2
- Snyder County2
- Sullivan County2
- Susquehanna County2
- Union County2
- Wayne County2
- Wyoming County2
- Crawford County2
- Lawrence County2
- Mercer County2
- Venango County2
- Philadelphia County2
- Huntingdon County1
- Erie County1
- Allegheny County1
- Armstrong County1
- Beaver County1
- Butler County1
- Cameron County1
- Clarion County1
- Elk County1
23 more counties
- Forest County1
- Jefferson County1
- McKean County1
- Potter County1
- Warren County1
- Washington County1
- Westmoreland County1
- Lehigh County1
- Northampton County1
- Adams County1
- Bedford County1
- Bucks County1
- Chester County1
- Cumberland County1
- Dauphin County1
- Delaware County1
- Franklin County1
- Fulton County1
- Lancaster County1
- Lebanon County1
- Montgomery County1
- Perry County1
- York County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20172019
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.