020
FGUS75 KMSO 071002
ESFMSO
MTC029-047-063-081015-

Hydrologic Outlook
National Weather Service Missoula MT
402 AM MDT Mon Sep 7 2026

What: Widespread moderate rainfall over a prolonged period of time.
Storm total amounts between 1 to 2 inches for valleys and 2 to 3
inches for the mountains.

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

Timing: Continuing through Tuesday morning. The heaviest rainfall
rates are anticipated today and tonight.

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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