de: 17/03/2026, 11:11
a: 18/03/2026, 13:00

ESFMSO

Flathead, Lake, and Mineral Counties

Rain will increase this evening lasting into Wednesday afternoon, this combined with warm temperatures will cause an increase in melt from a primed snowpack. Flows in streams and creeks may increase quickly. However, mainstem rivers are expected to remain well below flood stage. Additionally, ponding may occur in urban areas. Rock and snowslides are also be a concern along roadways.

de: 18/03/2026, 06:44
a: 19/03/2026, 06:00

AVWMSO

The following message is transmitted at the request of Flathead Avalanche Center Hungry Horse MT.

...AVALANCHE WARNING ISSUED BY THE FLATHEAD AVALANCHE CENTER...

06:00 MDT Wed Mar 18 2026 The Flathead Avalanche Center in Hungry Horse has issued a BACKCOUNTRY AVALANCHE WARNING for the following areas:

NWS Missoula MT - MTZ001 (MTZ001)...MTZ002 (MTZ002)

* WHAT...Above-freezing temperatures, strong winds, and rain have created very dangerous avalanche conditions.

* WHERE...Slopes above 5,000 feet in the Whitefish, Swan, Flathead Ranges, and the Lake McDonald and Marias Pass areas of Glacier National Park.</p>

* WHEN...In effect from Wed 06:00 MDT to Thu 06:00 MDT.

* IMPACTS...Natural and human-triggered avalanches are very likely. Wet loose avalanches will entrain a dangerous amount of wet debris. Weak layers buried several feet deep may fail, resulting in very large and destructive avalanches.

* PRECAUTIONARY / PREPAREDNESS ACTIONS...Very dangerous avalanche conditions. Travel in avalanche terrain is not recommended. Avalanches may run long distances and can run into mature forests, valley floors, or flat terrain.

Consult http://www.flatheadavalanche.org/ or www.avalanche.org for more detailed information.

Similar avalanche danger may exist at locations outside the coverage area of this or any avalanche center.