Snowfall Feb 10th through Feb 11th was supported due to jet dynamic ascent and coincident frontogenesis south and east of Pittsburgh, and in the ridges.
With warm frontal propagation northward, there was plenty of
moisture available.

Winter Weather in FOREST, PENNSYLVANIA
From 10-FEB-21 16:00:00 to 11-FEB-21 09:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Up to 1.5 inches of snow fell in portions of Forest County.

Winter Weather in GREENE, PENNSYLVANIA
From 10-FEB-21 16:00:00 to 11-FEB-21 09:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Up to 2 inches of snow fell in Greene County.

Winter Weather in INDIANA, PENNSYLVANIA
From 10-FEB-21 16:00:00 to 11-FEB-21 09:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Four to five inches of snow fell in Indiana County.

Winter Weather in JEFFERSON, PENNSYLVANIA
From 10-FEB-21 16:00:00 to 11-FEB-21 09:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Up to 3 inches of snow fell in Jefferson County.

Winter Weather in VENANGO, PENNSYLVANIA
From 10-FEB-21 16:00:00 to 11-FEB-21 09:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Up to 2 inches of snow fell in Venango County.

Winter Weather in WASHINGTON, PENNSYLVANIA
From 10-FEB-21 16:00:00 to 11-FEB-21 09:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Up to 2 inches of snow fell in Washington County.

Winter Weather in WESTMORELAND RIDGES, PENNSYLVANIA
From 10-FEB-21 16:00:00 to 11-FEB-21 09:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Up to 4 inches of snow fell in the ridges of Westmoreland County.

Winter Weather in WESTMORELAND, PENNSYLVANIA
From 10-FEB-21 16:00:00 to 11-FEB-21 09:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Two to three and half inches of snow fell in Westmoreland County.

Winter Weather in ALLEGHENY, PENNSYLVANIA
From 10-FEB-21 16:00:00 to 11-FEB-21 09:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Two to three inches of snow fell in Allegheny County.

Winter Weather in ARMSTRONG, PENNSYLVANIA
From 10-FEB-21 16:00:00 to 11-FEB-21 09:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Two and half to four and half inches of snow fell in Armstrong County.

Winter Weather in BEAVER, PENNSYLVANIA
From 10-FEB-21 16:00:00 to 11-FEB-21 09:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Up to 2 inches of snow fell in portions of Beaver County.

Winter Weather in BUTLER, PENNSYLVANIA
From 10-FEB-21 16:00:00 to 11-FEB-21 09:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Two to three inches of snow fell in Butler County.

Winter Weather in CLARION, PENNSYLVANIA
From 10-FEB-21 16:00:00 to 11-FEB-21 09:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

One to two and half inches of snow fell in Clarion County.

Winter Weather in FAYETTE RIDGES, PENNSYLVANIA
From 10-FEB-21 16:00:00 to 11-FEB-21 09:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Up to 5 inches of snow fell in the ridges of Fayette County.

Winter Weather in FAYETTE, PENNSYLVANIA
From 10-FEB-21 16:00:00 to 11-FEB-21 09:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Two to five inches of snow fell in portions of Fayette County.