Thursday, January 10, 2013

Winter Storm Slams Wyoming

The cold front moved across Star Valley late this afternoon dropping temperatures quickly into the 20s on their way down to a very cold weekend.  Snow as of this evening is increasing, and will continue into Friday.  Riverton Forecast Office has provided a comprehensive summary of expected conditions for the next couple of days.

Summary | Forecast | Monitoring & Reporting Snowfall | Safety

Snowfall will begin across western Wyoming this evening, and intensify through the night. Snowfall will begin to spread east of the Continental Divide during the overnight hours, and become widespread by Friday afternoon. Snowfall accumulations will be significant at some locations. Check back to this news story for updated snowfall totals during the event.

An area of low pressure will sweep through the intermountain west this evening, introducing snowfall across the western mountains and valleys. The area of low pressure will move over southern Wyoming tonight, and move east through the day on Friday. The scenario will mean widespread snowfall, with snowfall spilling east of the Continental Divide overnight. As the system progresses eastward, snowfall will spread across the remainder of the area, and continue through Friday night. Below is an animated graphic showing the proposed path of the developing area of low pressure.

Model solution of upcoming winter system

The above loop also demonstrates two additional elements to this upcoming system. The first is an increased pressure gradient which may bring periods of gusty wind across favored locations. This may result in blowing and drifting snowfall and hazardous travel. Additionally, the lop shows that another slug of colder air moving across the state. Colder temperatures associated with this airmass are expected to linger for a few days after the system has moved east of the state.
What winter weather highlights are active, and how much snowfall will we get? Click the graphics below for more detailed information:

Current watches, warnings, and advisories across the forecast area Anticipated snowfall across central and western Wyoming
Current Watches, Warnings, and Advisories across central and western Wyoming
Anticipated Snowfall Across Central and Western Wyoming

Monitor our Severe Weather Summary Page for current Warnings, Watches, and Advisories. What's the difference?
Current Weather Story Check the latest Weather Story graphic for an overview of the area forecast.
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