Alert archive / Pennsylvania / Severe Thunderstorm Watches / 2015
Severe Thunderstorm Watches in Pennsylvania, May 2015
3 severe thunderstorm watches in May 2015. 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 severe thunderstorm watches reaches back to 1997.
Severe Thunderstorm Watches by county
Each county as a circle sized by its count in May 2015. Tap one for its archive.
- Severe Thunderstorm Watches
- 3
- Busiest day
- May 11, 20151 severe thunderstorm watches
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 |
|---|---|---|---|---|
| May 11, 5:47 PM EDT | Severe Thunderstorm Watch | SPC | Allegheny, Beaver, Butler, Clarion, Crawford, Erie and 7 more | 4 hr |
| May 11, 8:18 PM EDT | Severe Thunderstorm Watch | SPC | Cameron, Elk, McKean, Potter, Warren | 4 hr |
| May 27, 12:54 PM EDT | Severe Thunderstorm Watch | SPC | Adams, Berks, Bucks, Carbon, Chester, Columbia and 22 more | 6 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Allegheny County1
- Beaver County1
- Butler County1
- Clarion County1
- Crawford County1
- Erie County1
- Forest County1
- Greene County1
- Jefferson County1
- Lawrence County1
- Mercer County1
- Venango County1
- Washington County1
- Cameron County1
- Elk County1
- McKean County1
- Potter County1
- Warren County1
- Adams County1
- Berks County1
- Bucks County1
- Carbon County1
- Chester County1
- Columbia County1
- Cumberland County1
- Dauphin County1
- Delaware County1
- Lackawanna County1
- Lancaster County1
- Lebanon County1
- Lehigh County1
- Luzerne County1
- Monroe County1
- Montgomery County1
- Montour County1
- Northampton County1
- Northumberland County1
- Perry County1
- Philadelphia County1
- Pike County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20142016
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.