Heavy Snow, Allegheny
- When
- March 9, 5:00 AM EST to 9:00 PM EST
- Where
- Allegheny forecast zone
- Reported by
- EMERGENCY MANAGER
- Coordinates
- 40.469, -79.981 (the zone’s center; the record gives no point)
Heavy Snow in Pennsylvania, March 9, 1999
A winter storm moved quickly across the Ohio Valley, producing snowfall totals of between 4 and 10 inches across southwest Pennsylvania. Some snowfall amounts included 6 inches in Moon Township, Allegheny County; 6 inches in the city of Washington, Washington County; 4 to 7 inches across Beaver County, and around 10 inches of new snow on the higher ridges of eastern Westmoreland County.
Where it happened
Every event with a place to put it; 3 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
- 2
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 4
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 moved quickly across the Ohio Valley, producing snowfall totals of between 4 and 10 inches across southwest Pennsylvania. Some snowfall amounts included 6 inches in Moon Township, Allegheny County; 6 inches in the city of Washington, Washington County; 4 to 7 inches across Beaver County, and around 10 inches of new snow on the higher ridges of eastern Westmoreland County. The snowfall and icy roads were responsible for numerous accidents on roadways across southwest Pennsylvania. Most accidents were of the fender-bender kind, but one collision in eastern Washington County sent two people to the hospital with minor injuries.
The radar
The national radar mosaic for the moment the first event began.
Event by event
4 heavy snow. Local standard time, as filed.
Heavy Snow, Beaver
- When
- March 9, 5:00 AM EST to 9:00 PM EST
- Where
- Beaver forecast zone
- Reported by
- EMERGENCY MANAGER
- Coordinates
- 40.682, -80.349 (the zone’s center; the record gives no point)
Heavy Snow, Washington
- When
- March 9, 5:00 AM EST to 9:00 PM EST
- Where
- Washington forecast zone
- Injuries
- 2 direct, 0 indirect
- Reported by
- EMERGENCY MANAGER
- Coordinates
- 40.189, -80.248 (the zone’s center; the record gives no point)
Heavy Snow, Westmoreland
- When
- March 9, 5:00 AM EST to 9:00 PM EST
- Where
- Westmoreland forecast zone
- Reported by
- EMERGENCY MANAGER
What these are
- Heavy Snow
- Snowfall reaching the local warning threshold without the other hazards of a winter storm.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Damaging Wind in Alabama, March 9, 1999
- Heavy Snow in Michigan, March 9, 1999
- Damaging Wind in Alabama, March 9, 1999
- Heavy Snow in Ohio, March 9, 1999
- Winter Storm and Winter Weather in Virginia, March 9, 1999
- Damaging Wind in Florida, March 9, 1999
- Heavy Snow in Ohio, March 9, 1999
- Winter Storm and Winter Weather in Maryland, March 9, 1999
- Sleet in North Carolina, March 9, 1999
- Wildfire in Florida, March 9 to 10, 1999
- Heavy Snow in Ohio, March 9, 1999
- Heavy Snow and High Wind in Alaska, March 9 to 12, 1999
More
Every storm in Pennsylvania in 1999Every state in 1999This day in weather historyWarnings in Pennsylvania, March 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: 5688443, 5688444, 5688445, 5688446.