Alert archive / Pennsylvania / 1999
Weather alerts in Pennsylvania, April 1999
30 weather alerts in April 1999, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered any part of the state, so the counties below add up to more than the state.
Weather alerts by county
Each county as a circle sized by its count in April 1999. Tap one for its archive.
- Alerts
- 30
- Warnings
- 27
- Watches
- 3
- Advisories
- 0
- Busiest day
- April 9, 199915 alerts
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, 12:30 PM EDT | Severe Thunderstorm Watch | SPC | Allegheny, Armstrong, Beaver, Fayette, Greene, Washington and 1 more | 6 hr |
| 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, 2:52 PM EDT | Flash Flood Warning | PBZ | Allegheny, Washington | 3 hr |
| Apr 9, 2:54 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 60 min |
| Apr 9, 2:58 PM EDT | Flash Flood Warning | PBZ | Fayette, Greene | 3 hr |
| Apr 9, 3:11 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Westmoreland | 79 min |
| Apr 9, 3:39 PM EDT | Tornado Warning | PBZ | Westmoreland | 51 min |
| Apr 9, 3:47 PM EDT | Severe Thunderstorm Warning | CTP | Somerset | 43 min |
| Apr 9, 4:00 PM EDT | Severe Thunderstorm Watch | SPC | Bedford, Somerset | 5 hr |
| Apr 9, 4:06 PM EDT | Flash Flood Warning | PBZ | Beaver | 2 hr |
| Apr 9, 4:19 PM EDT | Flash Flood Warning | PBZ | Westmoreland | 3 hr |
| Apr 9, 4:23 PM EDT | Flash Flood Warning | PBZ | Butler | 3 hr |
| Apr 9, 5:51 PM EDT | Flash Flood Warning | PBZ | Washington, Westmoreland | 4 hr |
| Apr 9, 6:59 PM EDT | Flash Flood Warning | PBZ | Fayette | 3 hr |
| Apr 9, 9:46 PM EDT | Flash Flood Warning | PBZ | Fayette, Washington, Westmoreland | 6 hr |
| 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, 12:59 AM EDT | Flash Flood Warning | PBZ | Allegheny | 91 min |
| Apr 22, 1:05 AM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 60 min |
| Apr 22, 3:06 AM EDT | Flash Flood Warning | CTP | Cambria | 5 hr |
| Apr 23, 1:24 PM EDT | Severe Thunderstorm Warning | PBZ | Greene | 43 min |
| Apr 23, 1:45 PM EDT | Severe Thunderstorm Watch | SPC | Allegheny, Fayette, Greene, Somerset, Washington, Westmoreland | 5 hr |
| 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 product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
| Product | Alerts |
|---|---|
| Severe storms | |
| Severe Thunderstorm Warning | 16 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 3 |
| Flooding | |
| Flash Flood Warning | 10 |
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.