Heavy Snow, Mercer
- When
- December 13, 4:00 AM EST to December 15, 4:00 PM EST
- Where
- Mercer forecast zone
- Reported by
- Trained Spotter
- Coordinates
- 41.302, -80.258 (the zone’s center; the record gives no point)
Heavy Snow in Pennsylvania, December 13 to 15, 2010
A low pressure system moved east across the upper Ohio Valley bringing mixed precipitation followed by cold northwest flow. Lake effect snow bands produced heavy snow in Mercer county Pennsylvania, as well as the ridges in Westmoreland and Fayette counties in Pennsylvania.
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
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 3
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 low pressure system moved east across the upper Ohio Valley bringing mixed precipitation followed by cold northwest flow. Lake effect snow bands produced heavy snow in Mercer county Pennsylvania, as well as the ridges in Westmoreland and Fayette counties in Pennsylvania. Heavy snow also fell in the ridges of Preston and Tucker counties of West Virginia, and Garrett county Maryland. Storm totals of 6 to 10 inches of snow fell across portions of pennsylavania, with more than one foot of snow in portions of West Virginia and Garrett county Maryland.
The radar
The national radar mosaic for the moment the first event began.
Event by event
3 heavy snow. Local standard time, as filed.
Heavy Snow, Westmoreland Ridges
- When
- December 13, 4:00 AM EST to December 14, 7:00 PM EST
- Where
- Westmoreland Ridges forecast zone
- Reported by
- Trained Spotter
- Coordinates
- 40.311, -79.467 (the zone’s center; the record gives no point)
Heavy Snow, Fayette Ridges
- When
- December 13, 4:00 AM EST to December 14, 7:00 PM EST
- Where
- Fayette Ridges forecast zone
- Reported by
- Trained Spotter
- Coordinates
- 39.920, -79.647 (the zone’s center; the record gives no point)
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
- Cold in Tennessee, December 13, 2010
- Cold in Illinois, December 13, 2010
- Extreme Cold in Tennessee, December 13, 2010
- Flooding and High Wind in Maine, December 13 to 19, 2010
- Winter Weather in Vermont, December 13 to 14, 2010
- Winter Weather in New York, December 13 to 14, 2010
- Flooding in Maine, December 13 to 14, 2010
- Winter Weather in Virginia, December 13, 2010
- Flooding in Maine, December 13 to 15, 2010
- Frost and Freeze in Texas, December 13, 2010
- Heavy Snow and Lake-Effect Snow in Pennsylvania, December 13 to 15, 2010
- Damaging Winds in Oregon, December 13 to 14, 2010
More
Every storm in Pennsylvania in 2010Every state in 2010This day in weather historyWarnings in Pennsylvania, December 2010
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: 271157, 271158, 271159.