Powerful Pacific System Impacting the West; First Significant Snow for Portions of the East

Power Pacific system will continue to bring significant impacts for Pacific Northwest into northern California the remainder of the week. Dangerous coastal affects, heavy rain, flooding, strong winds, and higher elevation mountain snow continues. Meanwhile, a storm across the east is set to bring the first accumulating snow to many higher elevations of the Catskills into the central Appalachians. Read More >

Impacts: Rain and Snow showers will continue to increase across the western mountains and valleys Sunday evening. A strong cold front will push across western Wyoming around 5 am Monday morning. Snowfall rates will be highest across the western mountains and valleys with this frontal passage through morning commute time Monday. Travel over Teton Pass, Togwotee Pass and South Pass will likely be treacherous Monday morning with heavy snow along with blowing and drifting snow.

Snow will also spread along the Interstate 80 corridor with the advancing cold front Monday morning with conditions becoming slick along with limited visibility in snow and blowing snow.

The cold front will also spread scattered snow showers into the central basins Monday and Monday night. Snow showers are expected to be most numerous across the Bighorn Basin, Bighorn Mountains and eastern Johnson county Monday afternoon and Monday night. Interstates 90 and 25 across Johnson County will likely become slick with limited visibility in heavier snow showers Monday afternoon and Monday night.

Snow Accumulations (Sunday night through 6 am Tuesday):

Teton Mountains, Gros Ventre Mountains, Western Wind River Mountains, Salt River and Wyoming Ranges...10 to 20 inches
Jackson Hole and Star Valleys....5 to 10 inches
Rock Springs...2 to 4 inches
Upper Green River Basin...2 to 6 inches
Areas east of the divide...Trace to 1 inch.

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Powerful Pacific System Impacting the West; First Significant Snow for Portions of the East

Snow to Impact Western Wyoming Tonight and Monday, and Portions of Central Wyoming Monday and Monday Night