Major Winter Storm Ongoing in the Upper Midwest; Severe Weather Tonight from the Mid-South to the Ohio Valley

A major winter storm will continue to bring blizzard conditions, heavy snowfall, icing, and strong winds through Monday across the Upper Midwest and Upper Great Lakes. A line of storms will be capable of producing widespread damaging winds, tornadoes, and some large hail from the Mid-South to the Ohio Valley and the Southeast through tonight, moving into the Mid-Atlantic Monday. Read More >

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Last Map Update: Mon, Mar 16, 2026 at 4:52:15 am MDT

Watches, Warnings & Advisories

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National Weather Service Great Falls, MT

High Wind Warning

Winter Weather Advisory

Wind Advisory

Special Weather Statement

Hazardous Weather Outlook

Widespread Valley Snow Tonight through Monday

Urban Snowmelt Expected Wednesday through Saturday

❄️ Widespread valley snow will impact the Monday morning commute across Western Montana and Central Idaho, creating slick driving conditions. Details: The area of greatest concern is focused along the ID/MT border and into the Missoula and Bitterroot valley. Expect long stretches of snow-covered roads, particularly along the I-90 corridor. By late morning on Monday, precipitation will transition to a wintry mix, causing any bare surfaces to quickly become icy. Action: Commuters should allow for extra travel time, reduce speeds, and check local road conditions before heading out. 🚗

Impact: Rapid snowmelt driven by temperatures in the 50s and 60s will lead to standing water and ponding across the Northern Rockies from Wednesday, March 18th through Saturday, March 21st. Details: As the warm-up continues, standing water will accumulate on roads and residential properties. Expect water to infiltrate basements and low-lying outbuildings. Additionally, snow and debris clogging culverts will force water to sheet over roadways, creating unpredictable driving hazards. Action: Take time now to clear snow and ice away from your home's foundation and nearby storm drains. Never drive through flooded or water-covered roadways.

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Major Winter Storm Ongoing in the Upper Midwest; Severe Weather Tonight from the Mid-South to the Ohio Valley

NWS Forecast Office Missoula, MT