FGUS75 KMSO 141916
ESFMSO
MTC029-053-089-161900-

Hydrologic Outlook
National Weather Service Missoula MT
1216 PM MST Sun Dec 14 2025

...AN ATMOSPHERIC RIVER PRODUCING MODERATE TO HEAVY PRECIPITATION 
WILL INCREASE THE RISK FOR ROCK AND LANDSLIDES, ALONG WITH RISING 
CREEKS AND RIVERS...

NORTHWEST MONTANA

A prolonged Atmospheric River is expected to impact Western Montana 
and North-Central Idaho from Monday through Wednesday, bringing 
moderate to heavy precipitation. Snow levels are anticipated to 
start around 7,000 feet on Monday before falling to valley floors 
behind a cold front early Wednesday. The most likely rainfall 
scenario forecasts 0.75 to 1.25 inches for the valleys of Lincoln, 
Mineral, Sanders and Flathead Counties in northwest Montana.  1.50 
to 3 inches expected in the mountains.  A high-end scenario could 
bring a total of 4 inches to the Cabinet and Purcell Mountains.  

Due to already saturated ground, rainfall will increase the risk of 
rock and landslides across northwest Montana. Continue to monitor 
the latest forecast updates as this system approaches.
$$