Weather
Idaho Winter Weather Awareness Through Oct 31: Snow Squall Dangers
Boise, ID – Idaho motorists can face dangerous highway conditions when sudden snow squalls and strong winds reduce visibility to near zero. As winter weather preparedness messaging continues Wednesday
By Miles Carter · 2026-10-28T10:52:21.403Z
Boise, ID – Idaho motorists can face dangerous highway conditions when sudden snow squalls and strong winds reduce visibility to near zero. As winter weather preparedness messaging continues Wednesday, Oct. 28, drivers are being reminded that brief bursts of heavy snow can turn mountain passes and exposed highways into serious travel hazards.
According to the National Weather Service NWS , snow squalls are short lived bursts of intense snowfall, often accompanied by gusty winds and rapidly deteriorating visibility. These conditions can develop within minutes, leaving motorists little time to respond.
How Snow Squalls Threaten Idaho Highways Interstate 84, Interstate 90, Interstate 15 and U.S. highways 20 and 95 are among Idaho's major travel corridors where sudden snowfall and blowing snow can create hazardous conditions.
Motorists traveling through Ada, Canyon, Elmore, Twin Falls, Bonneville and Kootenai counties may encounter rapidly changing visibility, especially on exposed highways and mountain routes.
Interstate 84 between Boise, Mountain Home and Twin Falls can experience strong winds and blowing snow. In northern Idaho, Interstate 90 near Lookout Pass is vulnerable to rapidly changing mountain weather.
Eastern Idaho also faces significant blowing snow risks across open terrain, where strong winds can reduce visibility even after snowfall ends.
What Is a Snow Squall Warning? The NWS issues Snow Squall Warnings when dangerous snow squalls are occurring or imminent.
These warnings typically last 30 to 60 minutes and may activate Wireless Emergency Alerts on compatible mobile phones.
A warning indicates an immediate threat to motorists, particularly at interstate speeds, where sudden whiteouts can contribute to chain reaction crashes.
Drivers should also monitor Winter Storm Warnings and Blizzard Warnings when longer lasting hazardous conditions are expected.
What Idaho Drivers Should Do When a Snow Squall Warning is issued, the safest option is to delay travel until conditions improve .
Drivers already traveling should reduce speed gradually, increase following distance and turn on headlights.
Avoid sudden braking, abrupt lane changes and stopping in active travel lanes. If visibility deteriorates, exit the highway safely when possible.
Motorists can check current highway conditions and closures through Idaho 511 .
Official forecasts and warnings are available from the NWS Boise office , NWS Pocatello office and NWS Spokane office , which serve different portions of Idaho.
Winter weather preparedness messaging continues through Saturday, Oct. 31, as part of this editorial series , emphasizing how quickly snow squalls and blowing snow can transform Idaho highways into dangerous whiteout conditions