Tracking Late Season Winter Storms

A moderate atmospheric river will continue to bring heavy snow over the Olympics, northern Cascades and northern Rockies Friday while heavy rain may bring flooding to coastal Oregon and Washington. A winter storm will continue to push across the Great Lakes and Northeast U.S. Friday and Saturday with areas of heavy snow and high winds. Read More >

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Last Map Update: Fri, Mar 13, 2026 at 6:26:23 am MDT

Watches, Warnings & Advisories

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National Weather Service Great Falls, MT

Winter Storm Warning

Avalanche Warning

Flood Warning

Winter Weather Advisory

Wind Advisory

Winter Storm Watch

Flood Watch

High Wind Watch

Hazardous Weather Outlook

Hydrologic Outlook

Valley Snow Tonight through Saturday

Extreme Weather for Backcountry and High Passes

❄️ Planning to head out tonight through Saturday? Valleys north of I-90 (including the Missoula area) are looking at a 90% chance of 1-3" of snow, creating slick and slushy travel. 🕒 Primary Concern: Overnight and early morning hours. 📈 Highest Confidence: North of I-90. ⚠️ Worst Case: A 10% chance exists for up to 6" in some spots. Check the latest road conditions before you head out!

🚨 If your late-week plans involve the backcountry or high mountain passes, it's time to reconsider. Extreme winter weather is expected through Saturday (March 12-14), with the most critical danger above 5,000 feet. We are tracking snowfall that will be measured in feet (up to 3-6 ft in some areas). Travel over Marias, Lolo, and Lost Trail passes will become treacherous. We strongly advise delaying backcountry recreation and pass travel until conditions improve. Stay safe, ensure your vehicle is equipped with a winter kit, and always check local avalanche forecasts. 🏔️❄️

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Tracking Late Season Winter Storms

NWS Forecast Office Missoula, MT