Winter Weather — Sullivan, Pennsylvania

2026-01-11 · Sullivan, Pennsylvania

Event narrative

SNOW SQUALL. A snow squall moved across Sullivan County during the early afternoon of January 11, 2026. The PennDOT RWIS station on the southbound side of US 220 reported a visibility of less than one quarter of a mile as the squall moved through. A flash freeze also occurred at the station, with road temperatures falling from 39.2 degrees to 29.5 degrees in 20 minutes.

Wider weather episode

A secondary cold front from an associated upper-level low pressure system tracking from the Ohio Valley allowed for snow shower development during the morning hours of January 11th. Clear skies with cold advection aloft allowed for meager, but sufficient, instability across the western half of Pennsylvania in an environment of ample lift and moisture to produce snow squalls. These snow squalls produced multiple instances of visibility below one-quarter of a mile, with multiple accidents with one reported on US Route 6 in McKean County and another accident on US Route 322 near Port Matilda. No injuries were reported from these accidents.

Source: NOAA Storm Events Database, event_id 1303333. Narrative written by the NWS forecast office that issued the report.