The passage of two troughs, one over the East Coast and another over the Great Lakes, created a long duration winter weather event. Convective snow showers started the afternoon of December 18th and created a few intense snow bands; 1 inch of snow in 30 minutes was recorded by an NWS employee. The lower elevations received 1-3 inches from snow showers that were inconsistent in intensity across the region. For the higher terrain, snow measurements ranged from 6-12 inches due to higher precipitation amounts from upsloping and higher snow ratios.

Winter Weather in ALLEGHENY, PENNSYLVANIA
From 18-DEC-23 13:00:00 to 19-DEC-23 10:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Convective snow showers the evening of December 18th caused 1 to 2 inches of snow in portions of western PA. One inch was recorded in Allegheny County.

Winter Weather in WASHINGTON, PENNSYLVANIA
From 18-DEC-23 13:00:00 to 19-DEC-23 10:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Convective snow showers the evening of December 18th caused 1 to 2 inches of snow in portions of western PA. One inch fell in 30 minutes in McMurray, in an intense band.

Winter Weather in ARMSTRONG, PENNSYLVANIA
From 18-DEC-23 13:00:00 to 19-DEC-23 10:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Convective snow showers the evening of December 18th caused 1 to 2 inches of snow in portions of western PA.

Winter Weather in BEAVER, PENNSYLVANIA
From 18-DEC-23 13:00:00 to 19-DEC-23 10:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Convective snow showers the evening of December 18th caused 1 to 2 inches of snow in portions of western PA.

Winter Weather in BUTLER, PENNSYLVANIA
From 18-DEC-23 13:00:00 to 19-DEC-23 10:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Convective snow showers the evening of December 18th caused 1 to 2.5 inches of snow in portions of western PA.

Winter Weather in CLARION, PENNSYLVANIA
From 18-DEC-23 13:00:00 to 19-DEC-23 10:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Convective snow showers the evening of December 18th caused 1 to 2 inches of snow in portions of western PA.

Winter Storm in FAYETTE RIDGES, PENNSYLVANIA
From 18-DEC-23 13:00:00 to 19-DEC-23 10:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Convective snow showers the evening of December 18th-19th caused 1 to 2 inches of snow in the lower elevations; 3 to 6 inches in portions of eastern Fayette County.

Winter Weather in FOREST, PENNSYLVANIA
From 18-DEC-23 13:00:00 to 19-DEC-23 10:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Convective snow showers the evening of December 18th caused 1 to 2 inches of snow in portions of western PA.

Winter Weather in GREENE, PENNSYLVANIA
From 18-DEC-23 13:00:00 to 19-DEC-23 10:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Convective snow showers the evening of December 18th-19th caused 1 to 2 inches of snow in portions of western PA.

Winter Weather in INDIANA COUNTY, PENNSYLVANIA
From 18-DEC-23 13:00:00 to 19-DEC-23 10:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Convective snow showers the evening of December 18th-19th caused 1 to 3 inches of snow in portions of western PA.

Winter Weather in MERCER, PENNSYLVANIA
From 18-DEC-23 13:00:00 to 19-DEC-23 10:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Convective snow showers the evening of December 18th-19th caused 1 to 3 inches of snow in portions of western PA.

Winter Weather in VENANGO, PENNSYLVANIA
From 18-DEC-23 13:00:00 to 19-DEC-23 10:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Convective snow showers the evening of December 18th-19th caused 1 to 3 inches of snow in portions of western PA.

Winter Weather in WESTMORELAND, PENNSYLVANIA
From 18-DEC-23 13:00:00 to 19-DEC-23 10:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Convective snow showers the evening of December 18th-19th caused 1 to 3 inches of snow in portions of western PA.

Winter Weather in FAYETTE, PENNSYLVANIA
From 18-DEC-23 13:00:00 to 19-DEC-23 10:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Unknown

Convective snow showers the evening of December 18th-19th caused 1 to 3 inches of snow in portions of western PA.

Winter Weather in WESTMORELAND RIDGES, PENNSYLVANIA
From 18-DEC-23 13:00:00 to 19-DEC-23 10:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Unknown

Convective snow showers the evening of December 18th caused 1 to 3 inches of snow in portions of western PA.

Winter Weather in HIGHER ELEVATIONS OF INDIANA COUNTY, PENNSYLVANIA
From 18-DEC-23 13:00:00 to 19-DEC-23 10:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Unknown

Convective snow showers the evening of December 18th-19th caused 1 to 3 inches of snow in portions of western PA.

Winter Weather in JEFFERSON, PENNSYLVANIA
From 18-DEC-23 13:00:00 to 19-DEC-23 10:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Unknown

Convective snow showers the evening of December 18th-19th caused 1 to 3 inches of snow in portions of western PA.

Winter Weather in LAWRENCE, PENNSYLVANIA
From 18-DEC-23 13:00:00 to 19-DEC-23 10:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Unknown

Convective snow showers the evening of December 18th-19th caused 1 to 3 inches of snow in portions of western PA.