A winter storm passed through the region December 1st through December 2nd and created up to a foot of snow in some portions of our region.
The low pressure system advanced through PA and NY. Deep moisture and lift resulted in snow across the Upper Ohio Valley region. Lake enhancement and upsloping also helped with high snowfall totals. During the storm, 850mb temps lingered near -9C and the dendritic growth zone was about 10,000 feet above the surface.

Winter Storm in ARMSTRONG, PENNSYLVANIA
From 01-DEC-20 01:00:00 to 02-DEC-20 07:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Up to 6 inches of snow fell in 12 hours in Armstrong County. Highest amount recorded in Freeport, PA.

Winter Storm in BEAVER, PENNSYLVANIA
From 01-DEC-20 01:00:00 to 02-DEC-20 07:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Up to 8 inches of snow fell in Beaver County in 24 hours. 9 inches of snow was reported in  New Brighton, PA on the morning of December 2nd.

Winter Storm in FAYETTE RIDGES, PENNSYLVANIA
From 01-DEC-20 01:00:00 to 02-DEC-20 07:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Up to a foot of snow fell in the ridges of Fayette County in 24 hours. Highest amount reported was 12.4 inches 1 ENE of Farmington,PA.

Winter Storm in FAYETTE, PENNSYLVANIA
From 01-DEC-20 01:00:00 to 02-DEC-20 07:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Up to ten inches of snow fell in 24 hours in areas of Fayette County. 10.2 inches fell in Woodale, PA.

Winter Storm in FOREST, PENNSYLVANIA
From 01-DEC-20 01:00:00 to 02-DEC-20 07:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Up to 8 inches of snow fell across Forest County PA in 24 hours.

Winter Storm in CLARION, PENNSYLVANIA
From 01-DEC-20 01:00:00 to 02-DEC-20 07:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

In 12 hours 6 inches of snow in portions of Clarion County. 3 miles SW Clarion 6.2  inches was reported at 700 AM on December 2nd.

Winter Weather in LAWRENCE, PENNSYLVANIA
From 01-DEC-20 01:00:00 to 02-DEC-20 07:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Up to 4.5 inches of snow fell in Lawrence County on December 1st in 12 hours. Higher amounts could have been experienced but only 1 measurement was reported to the NWS in Pittsburgh from Ellwood City, PA.

Winter Storm in WESTMORELAND RIDGES, PENNSYLVANIA
From 01-DEC-20 01:00:00 to 02-DEC-20 07:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Up to 9.4 inches of snow fell in 24 hours in the ridges of Westmoreland County. 9.4 inches fell in Ligonier, PA.

Winter Storm in WESTMORELAND, PENNSYLVANIA
From 01-DEC-20 01:00:00 to 02-DEC-20 07:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Up to 8 inches of snow fell in 24 hours.

Winter Weather in JEFFERSON, PENNSYLVANIA
From 01-DEC-20 01:00:00 to 02-DEC-20 07:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Up to 4.5 inches of snow fell in 12 hours in portions of Jefferson County PA. Higher amounts could have occurred, but only 1 report was made to NWS Pittsburgh from Timblin, PA.

Winter Weather in GREENE, PENNSYLVANIA
From 01-DEC-20 01:00:00 to 02-DEC-20 07:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Up to 3.4 inches of snow reported by COOP observer.

Winter Weather in ALLEGHENY, PENNSYLVANIA
From 01-DEC-20 01:00:00 to 02-DEC-20 07:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Across Allegheny County, 6 to 7.5 inches of snow fell in the span of 20 to 24 hours.

Winter Storm in BUTLER, PENNSYLVANIA
From 01-DEC-20 01:00:00 to 02-DEC-20 07:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

In less than 24 hours 8 to 11.5 inches of snow fell across Butler County. Highest amounts were reported in Mars and Seven Fields. An isolated snow band can be noted on radar between 3 and 7pm in the southern portion of Butler County.

Winter Storm in INDIANA, PENNSYLVANIA
From 01-DEC-20 01:00:00 to 02-DEC-20 07:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

On December 1st 6 to 7 inches of snow fell in about 12 hours in portions of Indiana County.

Winter Storm in MERCER, PENNSYLVANIA
From 01-DEC-20 01:00:00 to 02-DEC-20 07:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

On December 1st 8 to 15 inches of snow fell across Mercer County. 15 inches was reported in Jamestown, PA. 12 inches was reported in Greenville, PA.

Winter Storm in VENANGO, PENNSYLVANIA
From 01-DEC-20 01:00:00 to 02-DEC-20 07:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

On December 1st 8 to 9.5 inches of snow fell in Venango County in less than 24 hours. Highest reported was observed 6 miles southwest of Titusville, PA.

Winter Storm in WASHINGTON, PENNSYLVANIA
From 01-DEC-20 01:00:00 to 02-DEC-20 07:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Up to 8 inches of snow fell in portions of Washington County in less than 24 hours.