Wyoming starts the morning with rattling windows, fast-moving clouds, and wind rushing down valleys. Loose debris shifts. Snow clings to higher peaks. Conditions are already changing fast.
According to the National Weather Service in Riverton, a High Wind Warning remains in effect through this afternoon across central and western Wyoming. West winds of 30 to 40 mph are expected, with gusts reaching 65 mph. Isolated gusts near 70 mph are possible around the Wind River Basin foothills.
At the same time, winter storm warnings continue across western mountains. Heavy snow falls this morning and early afternoon in higher elevations. Lower valleys may see rain mixing with snow, especially during heavier bursts. Wind-driven snow could sharply reduce visibility over mountain passes.
Travel impacts are likely. U.S. Highway 26, U.S. 287, and WY-789 may become hazardous, especially for high-profile vehicles. Blowing snow, sudden gusts, and falling tree limbs remain concerns. Power outages are possible where winds peak.
Temperatures hover in the 30s today before dropping tonight. As precipitation tapers off, flash freezing becomes a risk on wet roads. Bridges and shaded areas may turn slick heading into Thursday morning.
Looking ahead to Friday, December 19, another system approaches. Meteorologists note another chance for snow west of the Continental Divide, while strong to high winds redevelop east of the Divide. This pattern signals a broader winter transition heading toward Christmas travel weekend.
What to do now:
Secure outdoor items. Avoid mountain travel during peak winds. Keep winter kits in vehicles. Delay travel if conditions worsen.
Five-Day Outlook for Riverton, WY
- Today: Windy, scattered showers, high near 55
- Thursday: Mostly sunny, breezy, high near 42
- Friday: Chance of rain and snow, windy, high near 57
- Saturday: Slight snow chance, breezy, high near 49
- Sunday: Partly sunny, calmer, high near 49
