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Sudden Snow Chaos: What Went Down in Pennsylvania?
Pennsylvania, USASaturday, December 20, 2025
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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
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