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Chain law in effect on Teton Pass with 12–24 inches of snow on the way to western Wyoming mountains

Wyoming Highway 22 over Teton Pass on Thursday morning. (WYDOT)

CASPER, Wyo. — Chain Law – Level 1 is in effect on Wyoming Highway 22 over Teton Pass, with black ice conditions reported between Wilson and the Idaho State Line as of 10:25 a.m. Thursday, according to the Wyoming Department of Transportation. No trailer traffic is allowed on the highway.

Heavy snow is coming to the Tetons and the Gros Ventre Mountains, with 12–24 inches expected by noon Friday, the National Weather Service in Riverton forecasts.

“Travel could be very difficult, including over Teton Pass and Togwotee Pass,” the NWS in Riverton said. “Patchy blowing snow could significantly reduce visibility. The hazardous conditions will impact the evening and morning commutes.”

Yellowstone National Park could see 18–24 inches in southwest portions, while 8–14 inches are possible in other areas, the NWS in Riverton forecasts. The Absaroka Mountains could see 6–12 inches, while 6–9 inches are forecast in Star Valley.

In southeast Wyoming, snow is expected to develop in the Sierra Madres late Thursday night, with 4–10 inches expected by Friday evening, according to the NWS in Riverton.

In central regions of the state such as Casper, snow is also expected Thursday night and Friday.

Snow forecast totals across much of Wyoming are indicated in the following map from the NWS in Riverton:

Real-time road condition information is available from WYDOT.


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