410
FGUS75 KMSO 051643
ESFMSO
MTC029-047-063-081100-

Hydrologic Outlook
National Weather Service Missoula MT
1043 AM MDT Sat Sep 5 2026

What: Widespread moderate rainfall over a prolonged period of time.
Storm total amounts between 1 to 3 inches for valleys and 2 to 3
inches for the mountains.  There is a 10 percent chance of isolated
rainfall amounts up to 4 inches along the Continental Divide.

Where: Flathead and Lake Counties in northwest Montana, including
Glacier National Park. Missoula county in west-central Montana.

Timing: Beginning Sunday morning, continuing through Monday night.
Heaviest rainfall rates anticipated Monday into Monday night.

Significant rainfall totals will bring potential for rapid rises on
streams and creeks, rock and debris slides and runoff issues in poor
drainage areas. Those recreating in the backcountry should take
caution on backcountry roadways for falling debris.

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