Alert archive / Pennsylvania / Tornado Watches
Tornado Watches in Pennsylvania, 1999
1 tornado watches in 1999. 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 tornado watches reaches back to 1997.
Tornado Watches by county
Each county as a circle sized by its count in 1999. Tap one for its archive.
- Tornado Watches
- 1
- Busiest month
- September1 tornado watches
- Busiest day
- September 29, 19991 tornado watches
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 |
|---|---|---|---|---|
| Sep 29, 3:45 PM EDT | Tornado Watch | SPC | Allegheny, Armstrong, Beaver, Bedford, Blair, Butler and 20 more | 6 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Allegheny County1
- Armstrong County1
- Beaver County1
- Bedford County1
- Blair County1
- Butler County1
- Cambria County1
- Cameron County1
- Clarion County1
- Clearfield County1
- Crawford County1
- Elk County1
- Erie County1
- Fayette County1
- Forest County1
- Greene County1
- Indiana County1
- Jefferson County1
- Lawrence County1
- McKean County1
- Mercer County1
- Somerset County1
- Venango County1
- Warren County1
- Washington County1
- Westmoreland County1
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive19982000
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.