Winter Weather Advisory issued October 10 at 10:40PM MDT until October 11 at 6:00PM MDT by NWS Great Falls MT
Official severe-weather alerts, warning areas, and disaster updates.
expired · active · official-source
* WHAT...For the Winter Weather Advisory, wet snow. Total snow accumulations up to two inches. Winds gusting as high as 40 mph. For the Winter Storm Warning, heavy, wet snow expected. Total snow accumulations between 4 and 8 inches. * WHERE...Gallatin Valley. * WHEN...For the Winter Weather Advisory, until 6 PM MDT Sunday. For the Winter Storm Warning, from 6 PM Sunday to 9 AM MDT Monday. * IMPACTS...Travel could be very difficult. Gusty winds combined with the wet and heavy nature of the snow could bring down tree branches. Isolated power outages are possible. The hazardous conditions will impact the Monday morning commute. * ADDITIONAL DETAILS...Snowfall amounts will vary drastically from grassy surfaces to roadways, most notably at lower elevations, with accumulations on non-grassy surfaces being confined mainly to between the evening through late morning hours. If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1.
- Event time
- Source last updated
- Current version retrieved
- Provider
- NWS — active weather alerts (Storm)
- Location
- MT, US
- Severity
- Moderate
- area
- Gallatin Valley
- event
- Winter Weather Advisory
- onset
- 2026-10-10T22:40:00-06:00
- states
- ["MT"]
- urgency
- Expected
- certainty
- Likely
- effective
- 2026-10-10T22:40:00-06:00
- message id
- urn:oid:2.49.0.1.840.0.02af72eff6eb04202cb1e430105d169874b37a5f.001.2
- references
- ["urn:oid:2.49.0.1.840.0.788ba8280995d2bd49591e4662266b21df9055f3.007.1","urn:oid:2.49.0.1.840.0.e3247f4b382a0c83c88dbd6ac1ed768dc1c2f4fa.006.1"]
- instruction
- If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1.
- message type
- Update
- location basis
- Approximate: centers of the NWS zones listed in the alert
- freshness minutes
- 60
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Update history (2 recent revisions)
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