An arctic airmass dropped temperatures well below zero across northern and western Pennsylvania, with wind chills dropping to -25 F to -30 F across northern Pennsylvania.
Every event with a place to put it; 8 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS CTP wrote it up.
An arctic airmass dropped temperatures well below zero across northern and western Pennsylvania, with wind chills dropping to -25 F to -30 F across northern Pennsylvania.
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 State College, PA wrote its last area forecast discussion before the first event at Jan 4, 6:42 PM EST, 7 hours 18 minutes earlier.
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</html>The national radar mosaic for the moment the first event began.
8 extreme cold/wind chill. Local standard time, as filed.
Observed minimum wind chills dipped to -25 F to -30 F.
Observed minimum wind chills dipped to -25 F to -30 F.
Observed minimum wind chills dipped to -25 F to -30 F.
Observed minimum wind chills dipped to -25 F to -30 F.
Observed minimum wind chills dipped to -25 F to -30 F.
Observed minimum wind chills dipped to -25 F to -30 F.
Observed minimum wind chills dipped to -25 F to -30 F.
Observed minimum wind chills dipped to -25 F to -30 F.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Pennsylvania in 2018Every state in 2018This day in weather historyWarnings in Pennsylvania, January 2018
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: 730092, 730093, 730094, 730095, 730096, 730097, 730098, 730099.