Burlington, VT – Vermont drivers are being warned to prepare for a flash freeze developing Tuesday night into Wednesday morning as temperatures drop sharply behind a departing weather system. The National Weather Service says lingering rain and snowmelt could refreeze within hours, creating black ice on major routes including I-89, Route 7, and US-2.
A flash freeze happens when pavement temperatures fall below freezing in a short time, causing wet or slushy surfaces to turn slick almost instantly. These conditions often follow mild daytime highs, catching drivers off guard once evening temperatures tumble.
Experts warn that a car moving 35 mph on icy roads may need up to 600 feet to stop, compared to about 60–100 feet on dry pavement. Motorists are advised to reduce speed, avoid cruise control, and leave extra space between vehicles.
“Even light precipitation can create slick conditions when temperatures fall this fast,” the NWS said in a Tuesday night advisory. “Expect black ice during the Wednesday morning commute.”
Drivers across Chittenden, Washington, and Addison Counties should expect slippery spots through midmorning Wednesday before gradual improvement.
