Traffic
Mid-Atlantic Thanksgiving: 'Micro Blizzards' Could Hit I-81
Harrisburg, PA – Imagine heading south on Interstate 81 for Thanksgiving, traveling through Pennsylvania toward Maryland and Virginia when a wall of blowing snow suddenly sweeps across the highway. Wi
By Paige Sullivan · 2026-11-14T11:33:28.641Z
Harrisburg, PA – Imagine heading south on Interstate 81 for Thanksgiving, traveling through Pennsylvania toward Maryland and Virginia when a wall of blowing snow suddenly sweeps across the highway. Within moments, semitrailers disappear into the whiteout, brake lights become difficult to see and a routine holiday drive turns dangerous.
It's a winter weather hazard Mid Atlantic motorists should understand before Thanksgiving on Thursday, Nov. 26.
According to the National Weather Service NWS , snow squalls are brief, intense bursts of snowfall that can produce gusty winds, near zero visibility and rapidly deteriorating road conditions. Sometimes informally described as "micro blizzards," these events can create dangerous highway conditions within minutes.
Mid Atlantic Highways Where Sudden Whiteouts Are a Concern Interstate 81, stretching through Pennsylvania, Maryland and Virginia, is a major Thanksgiving travel corridor where sudden snowfall can sharply reduce visibility.
Interstate 80 across northern Pennsylvania, Interstate 76 near Harrisburg and Philadelphia, and Interstate 70 through Pennsylvania and Maryland are additional routes where winter weather can disrupt holiday travel.
Interstate 95, connecting Philadelphia, Wilmington, Baltimore and the Washington metropolitan area, also carries heavy holiday traffic. Although coastal and urban sections are generally less exposed to snow squalls than inland mountain corridors, sudden snow can still create hazardous driving conditions.
Travelers near Scranton, PA; Hagerstown, MD; Winchester, VA; and Martinsburg, WV, should monitor forecasts when snow showers and gusty winds are possible.
Higher elevations of the Appalachians and exposed interstate stretches can experience rapidly changing visibility.
What Happens When a Snow Squall Warning Is Issued? The NWS issues Snow Squall Warnings when dangerous snow squalls are occurring or imminent.
Warnings generally last 30 to 60 minutes and may trigger Wireless Emergency Alerts on compatible mobile phones.
Sudden whiteouts at interstate speeds can increase the risk of multivehicle crashes, especially when motorists brake abruptly or follow too closely.
What Thanksgiving Travelers Should Do If a Snow Squall Warning affects a planned route, delay travel until conditions improve .
Drivers already traveling should gradually reduce speed, increase following distance, use low beam headlights and avoid sudden braking.
If visibility becomes dangerously poor, safely exit the highway when possible rather than stopping in an active travel lane.
Before departing, check 511 Pennsylvania , Maryland 511 and Virginia 511 for highway conditions and closures.
Official forecasts and warnings are available from NWS State College , NWS Baltimore/Washington and NWS Philadelphia/Mount Holly , which serve different portions of the Mid Atlantic.
This is a Thanksgiving travel preparedness reminder, not a prediction that snow squalls will strike the Mid Atlantic during the holiday. Recognizing how quickly visibility can disappear could help families make safer decisions on heavily traveled regional highways.