Hydrologic Outlook — Lake County, Montana
The National Weather Service issues this alert when conditions in the area meet its criteria — check the details below for what to expect.
Current Status
⚠️ Active: Hydrologic Outlook
Hydrologic Outlook issued September 5 at 10:43AM MDT by NWS Missoula MT
ESFMSO 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.
Effective September 5, 2026 at 12:43 PM ET · Expires September 8, 2026 at 7:00 AM ET
Event Details
Event Type
Hydrologic Outlook
Severity
unknown
Issued By
NWS Missoula MT
Expires
September 8, 2026 at 7:00 AM ET
Last Checked
1 minute ago
Also In Effect For
This same Hydrologic Outlook also covers:
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Frequently Asked Questions
What does a Hydrologic Outlook mean for Lake County, Montana?
The National Weather Service issues this alert when conditions in the area meet its criteria — check the details below for what to expect.
Is this Hydrologic Outlook currently active?
Yes — this alert is active as of our last check (1 minute ago). It's set to expire September 8, 2026 at 7:00 AM ET.
How do I get notified about Hydrologic Outlook alerts for Lake County?
Download StormCast free on Google Play and set Lake County, Montana as one of your monitored locations. StormCast checks the NWS feed continuously and pushes alerts like this directly to your phone — even with the screen off.
What other areas does this alert cover?
This same Hydrologic Outlook is also in effect for Missoula County, Flathead County.