A period of freezing rain affected Eastern Pennsylvania on the 5th and caused hazardous traveling conditions on untreated roadways. Ice accumulations averaged one to two tenths. Precipitation started briefly as sleet in most areas before quickly transitioning to freezing rain and then eventually to some spotty light rain. Freezing rain occurred during the morning of the 5th in Philadelphia and the nearby suburbs, in Berks County and the far northwestern Philadelphia suburbs from the mid morning into the afternoon, in the Lehigh Valley from the late morning through the early evening and in the valleys of the Poconos from the afternoon through the evening of the 5th. The air mass was so cold and dense that higher terrain locations in the Poconos just experienced plain rain.
Representative ice accumulations included two tenths of an inch in Shillington (Berks County) and East Stroudsburg (Monroe County), one tenth of an inch in East Coventry Township (Chester County), Doylestown (Bucks County), the Lehigh Valley International Airport, Gilbertsville (Montgomery County), Forks Township (Northampton County) and one twentieth of an inch at the Philadelphia International Airport.  The freezing rain was caused by the return flow off the Atlantic Ocean assisted by a weak stationary front over the Middle Atlantic States. While the air mass aloft warmed, the arctic air mass in place near the surface kept temperatures below freezing as precipitation moved through.

Winter Weather in UPPER BUCKS, PENNSYLVANIA
From 05-JAN-14 09:00:00 to 05-JAN-14 17:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in BERKS, PENNSYLVANIA
From 05-JAN-14 11:00:00 to 05-JAN-14 18:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in LEHIGH, PENNSYLVANIA
From 05-JAN-14 12:00:00 to 05-JAN-14 21:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in NORTHAMPTON, PENNSYLVANIA
From 05-JAN-14 12:00:00 to 05-JAN-14 21:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in PHILADELPHIA, PENNSYLVANIA
From 05-JAN-14 05:00:00 to 05-JAN-14 11:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Winter Weather in MONROE, PENNSYLVANIA
From 05-JAN-14 13:00:00 to 06-JAN-14 00:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Winter Weather in CARBON, PENNSYLVANIA
From 05-JAN-14 13:00:00 to 06-JAN-14 00:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Winter Weather in DELAWARE, PENNSYLVANIA
From 05-JAN-14 05:00:00 to 05-JAN-14 11:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Winter Weather in EASTERN CHESTER, PENNSYLVANIA
From 05-JAN-14 05:00:00 to 05-JAN-14 13:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in EASTERN MONTGOMERY, PENNSYLVANIA
From 05-JAN-14 06:00:00 to 05-JAN-14 14:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in LOWER BUCKS, PENNSYLVANIA
From 05-JAN-14 06:00:00 to 05-JAN-14 15:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in WESTERN CHESTER, PENNSYLVANIA
From 05-JAN-14 08:00:00 to 05-JAN-14 16:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winter Weather in WESTERN MONTGOMERY, PENNSYLVANIA
From 05-JAN-14 09:00:00 to 05-JAN-14 16:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter