An elongated frontal system brought a lengthy period of precipitation to the mid-Atlantic from late February 3 through February 4. A surge of warm air ahead of the front caused precipitation to fall as rain initially. As the front moved through, a wave of low pressure developed along it, prolonging precipitation as colder air drained into the region. This caused precipitation to change from rain to freezing rain, locally mixed with sleet or snow. A number of reports of light icing were received.

Winter Weather in CARBON, PENNSYLVANIA
From 04-FEB-22 07:00:00 to 04-FEB-22 21:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Light freezing rain fell following a transition from plain rain. A couple reports of trace amounts of icing were received, and it is likely that accretions of a tenth of an inch or more occurred in portions of the county based on surrounding reports.

Winter Weather in LOWER BUCKS, PENNSYLVANIA
From 04-FEB-22 17:30:00 to 04-FEB-22 21:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Light freezing rain fell following a transition from plain rain. The Doylestown Airport ASOS (KDYL) reported 0.01 inches of ice accretion.

Winter Weather in WESTERN MONTGOMERY, PENNSYLVANIA
From 04-FEB-22 14:30:00 to 04-FEB-22 21:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Light freezing rain fell following a transition from plain rain. The Pottstown Limerick ASOS (KPTW) reported 0.02 inches of ice accretion.

Winter Weather in WESTERN CHESTER, PENNSYLVANIA
From 04-FEB-22 18:00:00 to 04-FEB-22 21:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Light freezing rain fell following a transition from plain rain. A trained spotter in Oxford reported a trace of ice.

Winter Weather in NORTHAMPTON, PENNSYLVANIA
From 04-FEB-22 15:00:00 to 04-FEB-22 21:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Reports from surrounding counties suggest at least trace amounts of icing likely occurred following a transition from plain rain.

Winter Weather in LEHIGH, PENNSYLVANIA
From 04-FEB-22 13:00:00 to 04-FEB-22 21:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Light freezing rain fell following a transition from plain rain. A trained spotter in Allentown reported a trace of freezing rain, and it is possible some light accumulations of ice occurred in parts of the county.

Winter Weather in BERKS, PENNSYLVANIA
From 04-FEB-22 12:00:00 to 04-FEB-22 21:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Light icing occurred following a transition from plain rain. A trace of ice was reported in Huffs Church, and some light accumulations may have occurred in parts of the county.

Winter Weather in UPPER BUCKS, PENNSYLVANIA
From 04-FEB-22 15:00:00 to 04-FEB-22 21:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Reports from surrounding areas and surface observations overlaid with radar suggest at least trace amounts of icing occurred in portions of the zone.

Winter Weather in MONROE, PENNSYLVANIA
From 04-FEB-22 01:00:00 to 04-FEB-22 21:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Light freezing rain fell following a transition from plain rain. The Mount Pocono Airport ASOS (KMPO) reported 0.20 inches of ice accretion.