Montana Unknown Hydrologic Outlook | Effective 09/07/2026 03:02
ESFMSO
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