Weakening low pressure tracking out of the Mississippi Valley passed west of the mid-Atlantic on January 26. Secondary low pressure developed near the Delmarva region late on the 26th, tracking east-northeastward and passing south of New England. Upper level ridging prevented much intensification of this secondary low, which combined with the decaying primary low to bring a poorly organized weather system to the mid-Atlantic. A light wintry mix of precipitation fell, including a mix of snow and freezing rain.

Winter Weather in MONROE, PENNSYLVANIA
From 26-JAN-21 09:30:00 to 26-JAN-21 21:30:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Light snow and freezing rain fell. The Mount Pocono ASOS (KMPO) measured 0.09 inches of ice accretion, with nearby snowfall totals of an inch or less.

Winter Weather in CARBON, PENNSYLVANIA
From 26-JAN-21 09:00:00 to 26-JAN-21 20:30:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Light snow fell according to CoCoRaHS observations in Jim Thorpe, and observations from surrounding areas suggest scattered to widespread ice accretion of 0.01 to 0.10 inches likely occurred.

Winter Weather in NORTHAMPTON, PENNSYLVANIA
From 26-JAN-21 09:30:00 to 26-JAN-21 21:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Light snow and freezing rain fell. Snowfall of 0.5 inches was reported in Bangor, and observations from surrounding areas suggest patchy icing of a few hundredths of an inch likely occurred.

Winter Weather in LEHIGH, PENNSYLVANIA
From 26-JAN-21 09:00:00 to 26-JAN-21 20:30:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

A mix of snow and freezing rain fell. The Lehigh Valley International Airport ASOS (KABE) measured 0.20 inches of ice accretion.

Winter Weather in BERKS, PENNSYLVANIA
From 26-JAN-21 08:30:00 to 26-JAN-21 18:15:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Light snow and freezing rain fell, including an observed ice accretion of 0.04 inches at Reading Regional Airport (KRDG).

Winter Weather in LOWER BUCKS, PENNSYLVANIA
From 26-JAN-21 09:15:00 to 26-JAN-21 21:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Light freezing rain fell. The Doylestown Airport ASOS (KDYL) measured 0.08 inches of ice accretion.

Winter Weather in UPPER BUCKS, PENNSYLVANIA
From 26-JAN-21 09:15:00 to 26-JAN-21 21:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

An ice accretion of 0.08 inches was measured at Doylestown in Lower Bucks County, and it is assumed similar totals occurred in Upper Bucks.

Winter Weather in WESTERN MONTGOMERY, PENNSYLVANIA
From 26-JAN-21 08:30:00 to 26-JAN-21 18:15:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Light freezing rain fell. An ice accretion of 0.05 inches was measured at Pottstown Limerick Airport (KPTW).

Winter Weather in EASTERN MONTGOMERY, PENNSYLVANIA
From 26-JAN-21 08:30:00 to 26-JAN-21 17:30:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Surrounding observations, including from the KDYL and KPTW ASOS sites, suggest some light ice accretion of a few hundredths of an inch likely occurred.

Winter Weather in WESTERN CHESTER, PENNSYLVANIA
From 26-JAN-21 07:45:00 to 26-JAN-21 18:15:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Light freezing rain fell. A trained spotter in East Nantmeal Twp reported 0.10 inches of ice accretion.

Winter Weather in EASTERN CHESTER, PENNSYLVANIA
From 26-JAN-21 08:30:00 to 26-JAN-21 13:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Spotter and ASOS observations from surrounding locations suggest areas of light freezing rain occurred, likely producing a few hundredths of an inch of ice accretion.