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Iowa Thanksgiving: 'Micro Blizzards' Could Hit Des Moines, IA
Des Moines, IA – Imagine heading east on Interstate 80 for Thanksgiving when a sudden wall of blowing snow sweeps across the open Iowa countryside. Within moments, semitrailers disappear into the whit
By Audrey Sloan · 2026-11-14T11:26:20.470Z
Des Moines, IA – Imagine heading east on Interstate 80 for Thanksgiving when a sudden wall of blowing snow sweeps across the open Iowa countryside. Within moments, semitrailers disappear into the whiteout, brake lights become difficult to see and a familiar holiday drive turns dangerous.
It's a winter weather hazard Iowa motorists should understand as Thanksgiving approaches 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 called "micro blizzards," these events can create dangerous highway conditions within minutes.
Iowa Highways Where Sudden Whiteouts Are a Concern Interstate 80, connecting Council Bluffs, Des Moines, Iowa City and Davenport, is a major Thanksgiving travel corridor where sudden snowfall can sharply reduce visibility.
Interstate 35 through Ames and Des Moines, Interstate 380 between Cedar Rapids and Waterloo, and Interstate 29 along western Iowa are additional routes where winter weather can disrupt holiday travel.
Drivers traveling through Polk, Story, Linn, Johnson, Scott, Pottawattamie and Black Hawk counties should monitor forecasts when snow showers and strong winds are possible.
Iowa's open farmland offers little protection from strong crosswinds, allowing falling or previously accumulated snow to obscure roadways.
Blowing snow can also continue after snowfall ends, although not every blowing snow event qualifies as a snow squall.
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, particularly 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, activate 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 Iowa 511 for highway conditions, closures and travel advisories.
Official forecasts and warnings are available from NWS Des Moines , NWS Quad Cities and NWS Sioux Falls , which serve different portions of Iowa.
This is a Thanksgiving travel preparedness reminder, not a prediction that snow squalls will strike Iowa during the holiday. Recognizing how quickly visibility can disappear could help families make safer decisions on Iowa highways.