Winter Storm, Allegheny
- When
- January 8, 5:00 AM EST to January 9, 4:00 AM EST
- Where
- Allegheny forecast zone
- Reported by
- EMERGENCY MANAGER
- Coordinates
- 40.469, -79.981 (the zone’s center; the record gives no point)
Winter Storm in Pennsylvania, January 8 to 9, 1999
A winter storm spread a mix of snow and freezing rain across all of western Pennsylvania. By the afternoon of the 8th, snowfall amounts ranged from 2 to 4 inches across the west central Pennsylvania counties of Mercer, Venango, Clarion, Forest and Jefferson.
Where it happened
Every event with a place to put it; 12 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
- Tornadoes
- Tropical storms and surge
- Floods
- Wind
- Hail
- Winter weather
- Heat and drought
- Cold
- Fire, smoke and dust
- Marine and coastal
- Other
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 15
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
What happened
The episode as NWS PBZ wrote it up.
A winter storm spread a mix of snow and freezing rain across all of western Pennsylvania. By the afternoon of the 8th, snowfall amounts ranged from 2 to 4 inches across the west central Pennsylvania counties of Mercer, Venango, Clarion, Forest and Jefferson. These snowfall totals increased to 4 to 7 inches across the remainder of southwest Pennsylvania. By the evening of the 8th the snow had turned over to freezing rain across the entire region, which continued into the early morning hours of the 9th. Most areas across western Pennsylvania reported ice accumulations of between 1/4 and 1/2 inch.
The radar
The national radar mosaic for the moment the first event began.
Event by event
15 winter storm. Local standard time, as filed.
Winter Storm, Armstrong
- When
- January 8, 5:00 AM EST to January 9, 4:00 AM EST
- Where
- Armstrong forecast zone
- Reported by
- EMERGENCY MANAGER
- Coordinates
- 40.812, -79.464 (the zone’s center; the record gives no point)
Winter Storm, Beaver
- When
- January 8, 5:00 AM EST to January 9, 4:00 AM EST
- Where
- Beaver forecast zone
- Reported by
- EMERGENCY MANAGER
- Coordinates
- 40.682, -80.349 (the zone’s center; the record gives no point)
Winter Storm, Butler
- When
- January 8, 5:00 AM EST to January 9, 4:00 AM EST
- Where
- Butler forecast zone
- Reported by
- EMERGENCY MANAGER
- Coordinates
- 40.912, -79.913 (the zone’s center; the record gives no point)
Winter Storm, Clarion
- When
- January 8, 5:00 AM EST to January 9, 4:00 AM EST
- Where
- Clarion forecast zone
- Reported by
- EMERGENCY MANAGER
- Coordinates
- 41.192, -79.421 (the zone’s center; the record gives no point)
Winter Storm, Fayette
- When
- January 8, 5:00 AM EST to January 9, 4:00 AM EST
- Where
- Fayette forecast zone
- Reported by
- EMERGENCY MANAGER
Winter Storm, Forest
- When
- January 8, 5:00 AM EST to January 9, 4:00 AM EST
- Where
- Forest forecast zone
- Reported by
- EMERGENCY MANAGER
- Coordinates
- 41.513, -79.236 (the zone’s center; the record gives no point)
Winter Storm, Greene
- When
- January 8, 5:00 AM EST to January 9, 4:00 AM EST
- Where
- Greene forecast zone
- Reported by
- EMERGENCY MANAGER
- Coordinates
- 39.854, -80.223 (the zone’s center; the record gives no point)
Winter Storm, Indiana
- When
- January 8, 5:00 AM EST to January 9, 4:00 AM EST
- Where
- Indiana forecast zone
- Reported by
- EMERGENCY MANAGER
Winter Storm, Jefferson
- When
- January 8, 5:00 AM EST to January 9, 4:00 AM EST
- Where
- Jefferson forecast zone
- Reported by
- EMERGENCY MANAGER
- Coordinates
- 41.128, -78.999 (the zone’s center; the record gives no point)
Winter Storm, Lawrence
- When
- January 8, 5:00 AM EST to January 9, 4:00 AM EST
- Where
- Lawrence forecast zone
- Reported by
- EMERGENCY MANAGER
- Coordinates
- 40.991, -80.334 (the zone’s center; the record gives no point)
Winter Storm, Mercer
- When
- January 8, 5:00 AM EST to January 9, 4:00 AM EST
- Where
- Mercer forecast zone
- Reported by
- EMERGENCY MANAGER
- Coordinates
- 41.302, -80.258 (the zone’s center; the record gives no point)
Winter Storm, Venango
- When
- January 8, 5:00 AM EST to January 9, 4:00 AM EST
- Where
- Venango forecast zone
- Reported by
- EMERGENCY MANAGER
- Coordinates
- 41.401, -79.758 (the zone’s center; the record gives no point)
Winter Storm, Washington
- When
- January 8, 5:00 AM EST to January 9, 4:00 AM EST
- Where
- Washington forecast zone
- Reported by
- EMERGENCY MANAGER
- Coordinates
- 40.189, -80.248 (the zone’s center; the record gives no point)
Winter Storm, Westmoreland
- When
- January 8, 5:00 AM EST to January 9, 4:00 AM EST
- Where
- Westmoreland forecast zone
- Reported by
- EMERGENCY MANAGER
What these are
- Winter Storm
- A storm that brought snow, sleet or freezing rain at warning levels, usually over several hours or days.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Winter Storm and Winter Weather in Pennsylvania, January 8 to 9, 1999
- Ice Storm in West Virginia, January 8, 1999
- Tornadoes and Damaging Winds in Louisiana, January 8, 1999
- Winter Storm in Ohio, January 8 to 9, 1999
- Winter Storm in West Virginia, January 8 to 9, 1999
- Winter Storm in Vermont, January 8 to 9, 1999
- Winter Storm in New York, January 8 to 9, 1999
- Winter Storm in Pennsylvania, January 8, 1999
- Heavy Snow and Winter Weather in Maine, January 8 to 9, 1999
- Winter Storm and Winter Weather in Virginia, January 8 to 9, 1999
- Tornado and Hail in Mississippi, January 8, 1999
- Ice Storm in Kentucky, January 8, 1999
More
Every storm in Pennsylvania in 1999Every state in 1999This day in weather historyWarnings in Pennsylvania, January 1999
Sources
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-10-01. Each event’s entry at NCEI: 5685783, 5685784, 5685785, 5685873, 5685874, 5685875, 5685876, 5685877, 5685878, 5685879, 5685880, 5685881, 5685882, 5685883, 5685884.