The first significant winter storm of the 2012-2013 season brought a mixed-bag of snow, sleet, freezing rain and rain to central Pennsylvania on December 26th.  A primary surface low over the Tennessee and Ohio Valleys redeveloped east of the Appalachians and tracked northeast across the Delmarva and northern Mid-Atlantic coast. The snow began shortly after sunrise in the southwest and spread northward during the day. The snow and mixed precipitation tapered off in the west during the evening and in the east overnight.
Storm total snow accumulations ranged from 8-10 inches north of I-80; 6-8 inches over central and southwest sections; 3-5 inches in the middle Susquehanna Valley and 1-3 inches over the lower Susquehanna Valley.  The highest snow accumulation was recorded in Coudersport (Potter County) at 15 inches. The snow changed to sleet and freezing rain, then to plain rain over the lower Susquehanna Valley during the afternoon.  The precipitation type transition to sleet and freezing rain occurred later in the day and evening hour over middle Susquehanna Valley as well as the central mountains. The mixed precipitation limited the snow accumulations.  During the evening, thundersnow was witnessed in the State College area as a strong banded feature moved northward over north-central Pennsylvania.

Winter Storm in BEDFORD, PENNSYLVANIA
From 26-DEC-12 07:00:00 to 26-DEC-12 23:36:00 (EST-5)
Reported by: CoCoRaHS

Widespread snow accumulations between 6 and 8 inches were observed across the county. The snow mixed with sleet at times during the afternoon before ending as a period of light freezing drizzle.

Winter Storm in NORTHERN CLINTON, PENNSYLVANIA
From 26-DEC-12 13:00:00 to 27-DEC-12 03:30:00 (EST-5)
Reported by: COOP Observer

Widespread snow accumulations between 6 and 8 inches were observed across the county. The snow ended as a period of light freezing drizzle.

Winter Storm in FULTON, PENNSYLVANIA
From 26-DEC-12 07:00:00 to 26-DEC-12 23:36:00 (EST-5)
Reported by: Public

Widespread snow accumulations between 4 and 6 inches were observed across the county. The snow mixed with sleet and freezing rain at times during the afternoon with a light ice accumulation. Precipitation ending as a period of light freezing drizzle.

Winter Storm in SOMERSET, PENNSYLVANIA
From 26-DEC-12 07:00:00 to 26-DEC-12 23:36:00 (EST-5)
Reported by: COOP Observer

Widespread snow accumulations between 6 and 10 inches were observed across the county. The snow mixed with sleet and freezing rain at times during the afternoon before ending as a period of light freezing drizzle.

Winter Storm in CAMBRIA, PENNSYLVANIA
From 26-DEC-12 07:00:00 to 26-DEC-12 23:36:00 (EST-5)
Reported by: CoCoRaHS

Widespread snow accumulations between 6 and 8 inches were observed across the county. The snow mixed with sleet and freezing rain at times during the afternoon before ending as a period of light freezing drizzle.

Winter Storm in HUNTINGDON, PENNSYLVANIA
From 26-DEC-12 07:00:00 to 26-DEC-12 23:36:00 (EST-5)
Reported by: Public

Widespread snow accumulations between 4 and 6 inches were observed across the county. The snow mixed with sleet and freezing rain at times during the afternoon with a light ice accumulation. Precipitation ending as a period of light freezing drizzle.

Winter Storm in CLEARFIELD, PENNSYLVANIA
From 26-DEC-12 10:00:00 to 27-DEC-12 03:30:00 (EST-5)
Reported by: COOP Observer

Widespread snow accumulations between 6 and 8 inches were observed across the county. The snow mixed with sleet at times during the afternoon before ending as a period of light freezing drizzle.

Winter Storm in SOUTHERN CLINTON, PENNSYLVANIA
From 26-DEC-12 10:00:00 to 27-DEC-12 03:30:00 (EST-5)
Reported by: COOP Observer

Widespread snow accumulations between 6 and 8 inches were observed across the county. The snow mixed with sleet at times during the afternoon before ending as a period of light freezing drizzle.

Winter Storm in WARREN, PENNSYLVANIA
From 26-DEC-12 13:00:00 to 27-DEC-12 03:30:00 (EST-5)
Reported by: COOP Observer

Widespread snow accumulations between 6 and 8 inches were observed across the county. The snow ended as a period of light freezing drizzle.

Winter Storm in NORTHERN CENTRE, PENNSYLVANIA
From 26-DEC-12 10:00:00 to 27-DEC-12 03:30:00 (EST-5)
Reported by: COOP Observer

Widespread snow accumulations between 6 and 8 inches were observed across the county. The snow mixed with sleet at times during the afternoon before ending as a period of light freezing drizzle.

Winter Storm in BLAIR, PENNSYLVANIA
From 26-DEC-12 07:00:00 to 26-DEC-12 23:36:00 (EST-5)
Reported by: COOP Observer

Widespread snow accumulations between 6 and 8 inches were observed across the county. The snow mixed with sleet at times during the afternoon before ending as a period of light freezing drizzle.

Winter Storm in SOUTHERN CENTRE, PENNSYLVANIA
From 26-DEC-12 10:00:00 to 27-DEC-12 03:30:00 (EST-5)
Reported by: COOP Observer

Widespread snow accumulations between 6 and 8 inches were observed across the county. The snow mixed with sleet at times during the afternoon before ending as a period of light freezing drizzle.

Winter Storm in COLUMBIA, PENNSYLVANIA
From 26-DEC-12 10:00:00 to 27-DEC-12 06:22:00 (EST-5)
Reported by: COOP Observer

Widespread snow accumulations between 6 and 8 inches were observed across the county. The snow mixed with sleet at times during the afternoon before ending as a period of light freezing drizzle.

Winter Storm in SOUTHERN LYCOMING, PENNSYLVANIA
From 26-DEC-12 10:00:00 to 27-DEC-12 06:22:00 (EST-5)
Reported by: COOP Observer

Widespread snow accumulations between 6 and 8 inches were observed across the county. The snow ended as a period of light freezing drizzle.

Winter Storm in TIOGA, PENNSYLVANIA
From 26-DEC-12 13:00:00 to 27-DEC-12 06:22:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Widespread snow accumulations between 6 and 8 inches were observed across the county. The snow ended as a period of light freezing drizzle.

Winter Storm in NORTHERN LYCOMING, PENNSYLVANIA
From 26-DEC-12 13:00:00 to 27-DEC-12 06:22:00 (EST-5)
Reported by: COOP Observer

Widespread snow accumulations between 6 and 8 inches were observed across the county. The snow ended as a period of light freezing drizzle.

Winter Storm in SULLIVAN, PENNSYLVANIA
From 26-DEC-12 13:00:00 to 27-DEC-12 06:22:00 (EST-5)
Reported by: COOP Observer

Widespread snow accumulations between 6 and 8 inches were observed across the county. The snow ended as a period of light freezing drizzle.

Winter Storm in MCKEAN, PENNSYLVANIA
From 26-DEC-12 13:00:00 to 27-DEC-12 03:30:00 (EST-5)
Reported by: COOP Observer

Widespread snow accumulations between 8 and 10 inches were observed across the county. The snow ended as a period of light freezing drizzle.

Winter Storm in POTTER, PENNSYLVANIA
From 26-DEC-12 13:00:00 to 27-DEC-12 03:30:00 (EST-5)
Reported by: COOP Observer

Widespread snow accumulations between 8 and 12 inches were observed across the county. Localized amounts over a foot were also reported. The snow ended as a period of light freezing drizzle.

Winter Storm in ELK, PENNSYLVANIA
From 26-DEC-12 13:00:00 to 27-DEC-12 03:30:00 (EST-5)
Reported by: COOP Observer

Widespread snow accumulations between 8 and 10 inches were observed across the county. The snow ended as a period of light freezing drizzle.

Winter Storm in CAMERON, PENNSYLVANIA
From 26-DEC-12 13:00:00 to 27-DEC-12 03:30:00 (EST-5)
Reported by: COOP Observer

Widespread snow accumulations between 6 and 8 inches were observed across the county. The snow ended as a period of light freezing drizzle.