Heavy Rain and Mountain Snow Lingers in California; Winter Storm Impacting the Great Lakes and Northeast U.S.

An atmospheric river will wind down through today across California with lingering heavy rainfall, heavy mountain snow, and gusty winds. A wintry mix of freezing rain, sleet, and snow will cause hazardous travel conditions for the Great Lakes into the northern Mid-Atlantic and southern New England today through Saturday morning. Areas of tree damage and power outages are possible. Read More >

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Last Map Update: Fri, Dec 26, 2025 at 11:52:25 pm MST

Watches, Warnings & Advisories

National Weather Service Great Falls, MT

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National Weather Service Western and Central Wyoming

Winter Storm Warning

Extreme Cold Warning

Winter Weather Advisory

Cold Weather Advisory

Dense Fog Advisory

Wind Advisory

Special Weather Statement

Hazardous Weather Outlook

Mountain Wave Activity

Weather Outlook

Snowfall Saturday

Foothills Winds

Mountain Snow

Mountain wave activity is likely through the morning before a cold front moves through mid day. Take the necessary actions to protect your property.

A cold front early Saturday will bring the chance of light snow and colder temps through the weekend. Continue to monitor the forecast.

A quick moving system will bring light snowfall to the plains Saturday. Much cooler temperatures will follow through Saturday and into Sunday.

Breezy conditions will return to areas across the western foothills through Saturday morning. Use caution if traveling.

Periods of accumulating snow are forecast for the west-south facing slopes of the Absaroka/Beartooths through Saturday. Avalanche danger may increase and backcountry conditions may become difficult.