Dense Fog Advisory issued October 13 at 11:10PM MDT until October 14 at 12:00PM MDT by NWS Great Falls MT
Official severe-weather alerts, warning areas, and disaster updates.
expired · active · official-source
* WHAT...Highly variable visibility as low as one quarter of a mile in dense fog. * WHERE...Canyon Ferry Area, Gallatin Valley, and Missouri Headwaters. * WHEN...Until noon MDT Wednesday. * IMPACTS...Low visibility could make driving conditions hazardous. * ADDITIONAL DETAILS...Below freezing temperatures tonight may lead to a glaze of ice on surfaces, most notably on bridges and overpasses. If driving, slow down, use your headlights, and leave plenty of distance ahead of you.
- Event time
- Source last updated
- Current version retrieved
- Provider
- NWS — active weather alerts (Storm)
- Location
- MT, US
- Severity
- Moderate
- area
- Canyon Ferry Area; Missouri Headwaters; Gallatin Valley
- event
- Dense Fog Advisory
- onset
- 2026-10-13T23:10:00-06:00
- states
- ["MT"]
- urgency
- Expected
- certainty
- Likely
- effective
- 2026-10-13T23:10:00-06:00
- message id
- urn:oid:2.49.0.1.840.0.77790504170834393df0301efa14c494a0b93981.001.1
- references
- ["urn:oid:2.49.0.1.840.0.7142704ef99fb8cf9400c2ae2b3119703f47207f.001.1"]
- instruction
- If driving, slow down, use your headlights, and leave plenty of distance ahead of you.
- message type
- Update
- location basis
- Approximate: centers of the NWS zones listed in the alert
- freshness minutes
- 60
Source use policy · US government work (17 U.S.C. 105)
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Update history (2 recent revisions)
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