A complex, long duration winter storm impacted parts of the mid-Atlantic over the first three days of December. Impacts from the storm came mainly in two phases. Initially, weakening low pressure moved into the Midwest and Great Lakes region on December 1, bringing a widespread area of overrunning precipitation to the mid-Atlantic. Cold air in place ahead of the precipitation led to heavy mixed precipitation in interior areas, with most though not all areas eventually seeing a gradual change to rain. On December 2nd, developing secondary low pressure brought additional precipitation to the region, which took the form of rain changing to snow. The rapidly strengthening secondary low finally pulled away from the area during the early hours of December 3rd.

Winter Storm in MONROE, PENNSYLVANIA
From 01-DEC-19 11:00:00 to 03-DEC-19 03:30:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

A mix of snow, sleet, and freezing rain affected the county. As much as 0.72 inches of planar ice accumulation was measured at the Mount Pocono ASOS, with lesser amounts elsewhere. Most of the ice accumulation occurred during the day on December 1 and into early December 2. In addition, 1 to 3 inches of snow fell across much of the county, mainly on December 2.

Winter Weather in CARBON, PENNSYLVANIA
From 01-DEC-19 11:00:00 to 03-DEC-19 00:30:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Trace reports of freezing rain were received from the county, though reports from nearby areas suggest measurable amounts also likely occurred. Light snowfall also occurred, but reported totals were less than one inch.

Winter Weather in BERKS, PENNSYLVANIA
From 01-DEC-19 11:00:00 to 01-DEC-19 18:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Sleet and freezing rain occurred before precipitation changed to rain. Ice accumulations up to a tenth of an inch occurred, including 0.09 inches at the Reading, Pennsylvania ASOS.

Winter Weather in UPPER BUCKS, PENNSYLVANIA
From 01-DEC-19 11:00:00 to 03-DEC-19 00:30:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Sleet and ice occurred on December 1, with a trained spotter in Upper Black Eddy reporting 0.25 inches of ice accumulation. In addition, up to 1.2 inches of snow was report on December 2 by a COOP observer near Springtown.

Winter Weather in LEHIGH, PENNSYLVANIA
From 01-DEC-19 11:00:00 to 02-DEC-19 15:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

A mix of snow, sleet, and freezing rain occurred. The Lehigh Valley International Airport ASOS reported 0.25 inches of ice accumulation. Snowfall amounts were light in the county, with up to 1.4 inches measured by a trained spotter in Salisbury Twp.

Winter Weather in WESTERN MONTGOMERY, PENNSYLVANIA
From 01-DEC-19 11:00:00 to 01-DEC-19 16:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Freezing rain occurred before precipitation became all rain, including 0.07 inches of icing measured at the Pottstown, Pennsylvania ASOS.

Winter Weather in WESTERN CHESTER, PENNSYLVANIA
From 01-DEC-19 10:00:00 to 01-DEC-19 15:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Light freezing rain fell. Up to 0.12 inches of glaze ice fell in Elverson.

Winter Weather in LOWER BUCKS, PENNSYLVANIA
From 01-DEC-19 11:00:00 to 03-DEC-19 00:30:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

A light mix of snow and freezing rain occurred. At Doylestown, 0.08 inches of glaze ice were measured. Some light snow also occurred with accumulations around an inch or less.

Winter Weather in NORTHAMPTON, PENNSYLVANIA
From 01-DEC-19 12:00:00 to 03-DEC-19 03:30:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A mix of freezing rain and light snow occurred. Up to two tenths of an inch of glaze ice were measured in Forks Twp, with 3.1 inches of snow measured west of Portland.