Moisture trapped below a subsidence inversion located around 4000 feet MSL, in combination with very cold temperatures at the surface, produced pockets of light freezing fog and light freezing drizzle, under the inversion and primarily at the highest elevations. A trace of ice was reported on windshields in Williams Township, Northampton County, during the early overnight hours of January 8th.
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The episode as NWS PHI wrote it up.
Moisture trapped below a subsidence inversion located around 4000 feet MSL, in combination with very cold temperatures at the surface, produced pockets of light freezing fog and light freezing drizzle, under the inversion and primarily at the highest elevations. A trace of ice was reported on windshields in Williams Township, Northampton County, during the early overnight hours of January 8th. Parts of Williams Township are about 700 ASL.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Philadelphia/Mount Holly wrote its last area forecast discussion before the first event at Jan 7, 11:54 PM EST, 44 minutes earlier.
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</html>The national radar mosaic for the moment the first event began.
1 freezing fog. Local standard time, as filed.
A trace of ice was reported on windshields in Williams Township by a trained spotter. Parts of Williams Township are 700 feet ASL.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Pennsylvania in 2016Every state in 2016This day in weather historyWarnings in Pennsylvania, January 2016
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-10-01. Each event’s entry at NCEI: 607348.