Alert archive / Pennsylvania / 1999
Weather alerts in Pennsylvania, May 1999
38 weather alerts in May 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 May 1999. Tap one for its archive.
- Alerts
- 38
- Warnings
- 36
- Watches
- 2
- Advisories
- 0
- Busiest day
- May 24, 199922 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 |
|---|---|---|---|---|
| May 7, 6:37 PM EDT | Severe Thunderstorm Warning | CTP | Somerset | 38 min |
| May 7, 8:00 PM EDT | Severe Thunderstorm Warning | CTP | Bedford | 30 min |
| May 8, 3:24 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery | 46 min |
| May 8, 5:14 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming, Tioga | 61 min |
| May 8, 5:14 PM EDT | Severe Thunderstorm Warning | CTP | Union | 61 min |
| May 8, 5:28 PM EDT | Severe Thunderstorm Warning | BGM | Bradford | 62 min |
| May 8, 5:32 PM EDT | Severe Thunderstorm Warning | CTP | Northumberland, Snyder | 58 min |
| May 8, 5:32 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Montour | 58 min |
| May 8, 5:44 PM EDT | Severe Thunderstorm Warning | CTP | Sullivan | 61 min |
| May 8, 6:07 PM EDT | Severe Thunderstorm Warning | CTP | Columbia | 53 min |
| May 12, 6:21 PM EDT | Severe Thunderstorm Warning | CTP | Huntingdon | 24 min |
| May 12, 6:44 PM EDT | Severe Thunderstorm Warning | CTP | Huntingdon, Juniata, Mifflin | 46 min |
| May 18, 3:48 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 57 min |
| May 18, 5:36 PM EDT | Severe Thunderstorm Warning | PBZ | Greene | 54 min |
| May 18, 6:56 PM EDT | Flash Flood Warning | PBZ | Allegheny | 3 hr |
| May 18, 9:55 PM EDT | Flash Flood Warning | PBZ | Allegheny | 4 hr |
| May 24, 9:05 AM EDT | Severe Thunderstorm Watch | SPC | Berks, Bucks, Chester, Delaware, Lehigh, Monroe and 3 more | 6 hr |
| May 24, 10:08 AM EDT | Severe Thunderstorm Warning | PHI | Bucks | 32 min |
| May 24, 10:58 AM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 59 min |
| May 24, 11:15 AM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 58 min |
| May 24, 11:24 AM EDT | Severe Thunderstorm Warning | PBZ | Armstrong | 57 min |
| May 24, 12:04 PM EDT | Severe Thunderstorm Warning | CTP | Cambria, Clearfield | 56 min |
| May 24, 12:08 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana | 30 min |
| May 24, 12:25 PM EDT | Flash Flood Warning | PHI | Bucks, Philadelphia | 3 hr |
| May 24, 12:43 PM EDT | Severe Thunderstorm Warning | CTP | Cameron, Clinton | 62 min |
| May 24, 12:43 PM EDT | Severe Thunderstorm Warning | CTP | Centre | 62 min |
| May 24, 1:00 PM EDT | Severe Thunderstorm Watch | SPC | Adams, Berks, Bradford, Bucks, Carbon, Chester and 25 more | 6 hr |
| May 24, 2:03 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming, Tioga | 57 min |
| May 24, 2:40 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Sullivan | 50 min |
| May 24, 2:40 PM EDT | Severe Thunderstorm Warning | CTP | Northumberland, Snyder, Union | 50 min |
| May 24, 2:40 PM EDT | Severe Thunderstorm Warning | CTP | Montour | 50 min |
| May 24, 2:51 PM EDT | Severe Thunderstorm Warning | BGM | Bradford | 64 min |
| May 24, 3:11 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 29 min |
| May 24, 3:18 PM EDT | Severe Thunderstorm Warning | BGM | Luzerne, Wyoming | 62 min |
| May 24, 3:26 PM EDT | Severe Thunderstorm Warning | PHI | Delaware | 34 min |
| May 24, 3:40 PM EDT | Severe Thunderstorm Warning | PHI | Philadelphia | 30 min |
| May 24, 3:47 PM EDT | Severe Thunderstorm Warning | BGM | Susquehanna | 63 min |
| May 24, 4:26 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 34 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 | 33 |
| Severe Thunderstorm Watch | 2 |
| Flooding | |
| Flash Flood Warning | 3 |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Bucks County6
- Columbia County4
- Philadelphia County4
- Montgomery County3
- Union County3
- Bradford County3
- Northumberland County3
- Snyder County3
- Montour County3
- Sullivan County3
- Allegheny County3
- Chester County3
- Delaware County3
- Lycoming County2
- Tioga County2
- Huntingdon County2
- Berks County2
- Lehigh County2
- Monroe County2
- Northampton County2
- Luzerne County2
- Susquehanna County2
- Wyoming County2
- Somerset County1
- Bedford County1
- Juniata County1
- Mifflin County1
- Washington County1
- Greene County1
- Westmoreland County1
- Armstrong County1
- Cambria County1
- Clearfield County1
- Indiana County1
- Cameron County1
- Clinton County1
- Centre County1
- Adams County1
- Carbon County1
- Cumberland County1
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. Rebuilt daily.