Hydrologic Outlook — Cascade 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 10:40AM MDT by NWS Great Falls MT
ESFTFX Periods of rain are expected to begin on Sunday along the Rocky Mountain Front and then spread eastward out over the plains of North Central MT by Sunday night. Overall, total rainfall amounts of 1 to 3 inches will be common over North Central MT from Sunday through Monday, including the east side of Glacier Park. There is a 10 percent chance of isolated rainfall amounts up to 4 inches. At this time no significant flooding is expected. However, in areas that do receive closer to 3 inches or more of rainfall, some minor field or small stream flooding can not be ruled out. Additionally, some rocks could wash down on to roadways near mountains. Those planning outdoor activities over the next few days should be prepared for periods of rain.
Effective September 5, 2026 at 12:40 PM ET · Expires September 6, 2026 at 2:00 PM ET
Event Details
Event Type
Hydrologic Outlook
Severity
unknown
Issued By
NWS Great Falls MT
Expires
September 6, 2026 at 2:00 PM ET
Last Checked
2 minutes ago
Also In Effect For
This same Hydrologic Outlook also covers:
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Get Hydrologic Outlook Alerts for Cascade County
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Frequently Asked Questions
What does a Hydrologic Outlook mean for Cascade 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 (2 minutes ago). It's set to expire September 6, 2026 at 2:00 PM ET.
How do I get notified about Hydrologic Outlook alerts for Cascade County?
Download StormCast free on Google Play and set Cascade 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 Pondera County, Meagher County, Hill County, Glacier County, Liberty County, Lewis and Clark County, Fergus County, Judith Basin County, Teton County, Chouteau County, Blaine County, Toole County.