Dense Fog Advisory issued October 13 at 12:39AM MDT until October 13 at 12:00PM MDT by NWS Great Falls MT
Official severe-weather alerts, warning areas, and disaster updates.
expired · active · official-source
* WHAT...Visibility as low as one quarter of a mile in dense fog. * WHERE...Portions of central, north central, and southwest Montana. * WHEN...Until noon MDT today. * IMPACTS...Low visibility could make driving conditions hazardous. * ADDITIONAL DETAILS...Below freezing temperatures 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
- Eastern Glacier, Western Toole, and Central Pondera; Eastern Toole and Liberty; Hill County; Northern Blaine County; Eastern Pondera and Eastern Teton; Western and Central Chouteau County; Bears Paw Mountains and Southern Blaine; Cascade County below 5000ft; Judith Basin County and Judith Gap; Fergus County below 4500ft; Helena Valley; Meagher County Valleys; Canyon Ferry Area; Missouri Headwaters; Madison River Valley; Gallatin Valley
- event
- Dense Fog Advisory
- onset
- 2026-10-13T00:39:00-06:00
- states
- ["MT"]
- urgency
- Expected
- certainty
- Likely
- effective
- 2026-10-13T00:39:00-06:00
- message id
- urn:oid:2.49.0.1.840.0.d3288c450cabcfd8f152fc7fd0dd493c6093f5a8.001.1
- references
- ["urn:oid:2.49.0.1.840.0.6500907c0c193c6ae1b8ac9ff9ac424e7011f73c.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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