weatherneutral

Sudden Snow Chaos: What Went Down in Pennsylvania?

Pennsylvania, USASaturday, December 20, 2025
Advertisement

Friday Afternoon Chaos

Pennsylvania experienced a sudden snow squall on Friday afternoon, causing chaos for over 2 million people.

National Weather Service Warning

  • Issued at: 2:45 p.m. ET
  • Initial Expiry: 3:15 p.m.
  • Extended Until: 4 p.m. (due to worsening conditions)

Impacts

  • Heavy snowfall
  • Reduced visibility
  • Slowed traffic

Safety Advisories

"Stay in your vehicles if caught in the squall. Serious injuries and deaths can occur if you exit your cars."

  • Wet roadways freezing quickly
  • Black ice formation
  • Dangerous driving conditions

Affected Areas

  • Central and northeastern Allegheny County
  • Northwestern Washington County
  • Several other counties

Major Highways Impacted

  • Parkway North
  • Interstate 79
  • Interstate 376
  • Pennsylvania Turnpike

Larger Weather System

The snow squall was part of a larger weather system affecting the Northeast and mid-Atlantic regions, bringing:

  • Strong winds
  • Gusty conditions
  • Plunging temperatures

Commute Warnings

The NWS office in State College, Pennsylvania, warned of:

  • Snow showers
  • Strong winds
  • Potential impact on afternoon and evening commutes

Public Advisories

  • Monitor local weather forecasts
  • Be prepared to act quickly
  • Stay safe during sudden weather changes
  • Avoid exiting vehicles during a snow squall

Actions