Alert archive / Pennsylvania / Severe Thunderstorm Warnings / 1999
Severe Thunderstorm Warnings in Pennsylvania, April 1999
16 severe thunderstorm warnings in April 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 severe thunderstorm warnings reaches back to 1986.
Severe Thunderstorm Warnings by county
Each county as a circle sized by its count in April 1999. Tap one for its archive.
- Severe Thunderstorm Warnings
- 16
- Busiest day
- April 9, 19995 severe thunderstorm warnings
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 |
|---|---|---|---|---|
| Apr 9, 2:33 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 58 min |
| Apr 9, 2:44 PM EDT | Severe Thunderstorm Warning | PBZ | Greene | 59 min |
| Apr 9, 2:54 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 60 min |
| Apr 9, 3:11 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Westmoreland | 79 min |
| Apr 9, 3:47 PM EDT | Severe Thunderstorm Warning | CTP | Somerset | 43 min |
| Apr 11, 2:29 PM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 61 min |
| Apr 11, 4:16 PM EDT | Severe Thunderstorm Warning | PBZ | Mercer | 29 min |
| Apr 11, 4:32 PM EDT | Severe Thunderstorm Warning | PBZ | Venango | 43 min |
| Apr 21, 11:50 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver | 40 min |
| Apr 22, 12:44 AM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver | 42 min |
| Apr 22, 12:44 AM EDT | Severe Thunderstorm Warning | PBZ | Lawrence | 42 min |
| Apr 22, 1:05 AM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 60 min |
| Apr 23, 1:24 PM EDT | Severe Thunderstorm Warning | PBZ | Greene | 43 min |
| Apr 23, 1:54 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette | 41 min |
| Apr 23, 2:19 PM EDT | Severe Thunderstorm Warning | CTP | Somerset | 56 min |
| Apr 23, 2:40 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 35 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
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.