Alert archive / Pennsylvania / 1999
Weather alerts in Pennsylvania, August 1999
70 weather alerts in August 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 August 1999. Tap one for its archive.
- Alerts
- 70
- Warnings
- 67
- Watches
- 3
- Advisories
- 0
- Busiest day
- August 14, 199925 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 |
|---|---|---|---|---|
| Jul 31, 8:05 PM EDT | Severe Thunderstorm Warning | PBZ | Butler, Lawrence | 60 min |
| Jul 31, 8:07 PM EDT | Severe Thunderstorm Warning | CTP | Clearfield, Elk | 53 min |
| Jul 31, 8:18 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming, Tioga | 42 min |
| Jul 31, 8:40 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 65 min |
| Jul 31, 8:49 PM EDT | Severe Thunderstorm Warning | CTP | Clinton, Potter | 41 min |
| Jul 31, 9:00 PM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 60 min |
| Jul 31, 9:28 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana | 62 min |
| Jul 31, 9:48 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver | 57 min |
| Aug 1, 1:22 AM EDT | Severe Thunderstorm Warning | CTP | Franklin, Fulton | 38 min |
| Aug 4, 10:47 PM EDT | Severe Thunderstorm Warning | CLE | Erie | 63 min |
| Aug 13, 4:00 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana | 60 min |
| Aug 13, 4:22 PM EDT | Severe Thunderstorm Warning | CTP | Clearfield | 53 min |
| Aug 13, 4:26 PM EDT | Severe Thunderstorm Warning | CTP | Cambria | 64 min |
| Aug 13, 4:34 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Clinton | 86 min |
| Aug 13, 4:55 PM EDT | Severe Thunderstorm Warning | CTP | Blair | 65 min |
| Aug 13, 4:56 PM EDT | Tornado Warning | CTP | Cambria | 34 min |
| Aug 13, 5:15 PM EDT | Severe Thunderstorm Watch | SPC | Fayette, Greene, Somerset, Washington, Westmoreland | 5 hr |
| Aug 13, 5:18 PM EDT | Severe Thunderstorm Warning | CTP | Huntingdon | 57 min |
| Aug 13, 5:39 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming, Union | 66 min |
| Aug 13, 6:04 PM EDT | Severe Thunderstorm Warning | PBZ | Greene, Washington | 56 min |
| Aug 13, 6:28 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Westmoreland | 62 min |
| Aug 13, 8:08 PM EDT | Severe Thunderstorm Warning | CTP | Huntingdon, Juniata, Northumberland, Perry, Snyder | 67 min |
| Aug 13, 8:08 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland, Dauphin | 67 min |
| Aug 13, 8:08 PM EDT | Severe Thunderstorm Warning | CTP | Schuylkill | 67 min |
| Aug 13, 8:15 PM EDT | Severe Thunderstorm Watch | SPC | Adams, Berks, Bucks, Carbon, Chester, Columbia and 19 more | 4 hr |
| Aug 13, 8:43 PM EDT | Severe Thunderstorm Warning | BGM | Luzerne | 32 min |
| Aug 13, 8:54 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe | 46 min |
| Aug 13, 9:42 PM EDT | Severe Thunderstorm Warning | PHI | Carbon | 33 min |
| Aug 13, 9:54 PM EDT | Severe Thunderstorm Warning | PHI | Monroe, Northampton | 61 min |
| Aug 13, 10:14 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, Lebanon | 61 min |
| Aug 13, 10:27 PM EDT | Severe Thunderstorm Warning | CTP | Schuylkill | 63 min |
| Aug 13, 10:29 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 61 min |
| Aug 13, 11:30 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 60 min |
| Aug 14, 2:14 AM EDT | Flash Flood Warning | PHI | Bucks | 3 hr |
| Aug 14, 1:49 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, York | 56 min |
| Aug 14, 2:00 PM EDT | Severe Thunderstorm Watch | SPC | Berks, Bucks, Chester, Delaware, Lancaster, Lehigh and 4 more | |
| Aug 14, 2:41 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 64 min |
| Aug 14, 2:45 PM EDT | Severe Thunderstorm Warning | CTP | York | 30 min |
| Aug 14, 3:33 PM EDT | Severe Thunderstorm Warning | CTP | Tioga | 57 min |
| Aug 14, 3:50 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 55 min |
| Aug 14, 3:56 PM EDT | Severe Thunderstorm Warning | CTP | Perry | 64 min |
| Aug 14, 4:54 PM EDT | Severe Thunderstorm Warning | PHI | Delaware, Philadelphia | 46 min |
| Aug 14, 5:09 PM EDT | Severe Thunderstorm Warning | CTP | Clinton | 66 min |
| Aug 14, 5:19 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 51 min |
| Aug 14, 6:25 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Montour | 65 min |
| Aug 14, 7:11 PM EDT | Severe Thunderstorm Warning | BGM | Luzerne | 64 min |
| Aug 20, 10:18 AM EDT | Flash Flood Warning | CTP | Northumberland, Snyder, Union | 4 hr |
| Aug 20, 10:18 AM EDT | Flash Flood Warning | CTP | Montour | 4 hr |
| Aug 20, 11:25 AM EDT | Flash Flood Warning | CTP | Juniata | 3 hr |
| Aug 20, 2:03 PM EDT | Flash Flood Warning | CTP | McKean | 4 hr |
| Aug 20, 2:05 PM EDT | Flash Flood Warning | CTP | Juniata, Northumberland, Snyder | 3 hr |
| Aug 20, 2:05 PM EDT | Flash Flood Warning | CTP | Montour | 3 hr |
| Aug 20, 2:05 PM EDT | Flash Flood Warning | CTP | Union | 3 hr |
| Aug 20, 2:09 PM EDT | Flash Flood Warning | CTP | McKean | 66 min |
| Aug 20, 2:09 PM EDT | Severe Thunderstorm Warning | CTP | McKean | 66 min |
| Aug 20, 3:33 PM EDT | Severe Thunderstorm Warning | CTP | Clearfield, Elk | 57 min |
| Aug 20, 5:15 PM EDT | Flash Flood Warning | CTP | Juniata, Snyder | 5 hr |
| Aug 20, 5:15 PM EDT | Flash Flood Warning | CTP | Union | 5 hr |
| Aug 20, 5:33 PM EDT | Flash Flood Warning | PBZ | Forest | 4 hr |
| Aug 20, 5:50 PM EDT | Flash Flood Warning | CTP | McKean | 4 hr |
| Aug 24, 4:49 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 56 min |
| Aug 26, 4:44 PM EDT | Severe Thunderstorm Warning | CTP | York | 61 min |
| Aug 26, 5:41 PM EDT | Severe Thunderstorm Warning | CTP | York | 49 min |
| Aug 26, 5:49 PM EDT | Flash Flood Warning | CTP | York | 3 hr |
| Aug 26, 6:23 PM EDT | Severe Thunderstorm Warning | CTP | Juniata, Mifflin | 67 min |
| Aug 26, 6:24 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 66 min |
| Aug 26, 10:46 PM EDT | Flash Flood Warning | CTP | Juniata, Perry | 3 hr |
| Aug 26, 11:00 PM EDT | Flash Flood Warning | PHI | Chester | 4 hr |
| Aug 27, 4:07 PM EDT | Severe Thunderstorm Warning | CTP | Franklin | 68 min |
| Aug 27, 5:09 PM EDT | Flash Flood Warning | CTP | Bedford | 3 hr |
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 | 49 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 3 |
| Flooding | |
| Flash Flood Warning | 17 |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Lancaster County8
- York County7
- Juniata County6
- Union County4
- Northumberland County4
- Perry County4
- Snyder County4
- Bucks County4
- Montour County4
- McKean County4
- Clearfield County3
- Clinton County3
- Westmoreland County3
- Schuylkill County3
- Berks County3
- Carbon County3
- Chester County3
- Delaware County3
- Luzerne County3
- Monroe County3
- Northampton County3
- Philadelphia County3
- Elk County2
- Lycoming County2
- Tioga County2
- Allegheny County2
- Indiana County2
- Franklin County2
- Cambria County2
- Fayette County2
- Greene County2
- Washington County2
- Huntingdon County2
- Cumberland County2
- Dauphin County2
- Columbia County2
- Lebanon County2
- Lehigh County2
- Montgomery County2
- Butler 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.