Montana dense fog advisories
There are no dense fog advisories in Montana right now. The last one was issued on November 14, 2026.
Fog will reduce visibility to a quarter mile or less, making driving hazardous.
Updated from the National Weather Service · lists refresh hourly; the live map loads current alerts directly from the NWS
Map data: NWS, OpenFreeMap, OpenStreetMap
Active dense fog advisories in Montana
None right now. Other active alerts in Montana: none.
Dense Fog Advisories in Montana by year
Montana averaged 30.1 dense fog advisories per year from 2016 to 2025, and has had 30 so far in 2026. The most recent was issued on November 14, 2026.
Counties with the most dense fog advisories
Recent dense fog advisories in Montana
| Issued | Alert | Area |
|---|---|---|
| Nov 14, 4:02 AM EST | Dense Fog Advisory | Fallon; Carter |
| Nov 14, 3:41 AM EST | Dense Fog Advisory | Northern Blaine County |
What a dense fog advisory means
Dense fog can cause chain-reaction crashes on highways because drivers suddenly lose sight of the road ahead.
More about dense fog advisories and the national map →
What to do
- Slow down, use low-beam headlights and leave plenty of distance.
- Never use high beams in fog.
More Montana alerts
- Tornado Warnings
- Severe Thunderstorm Warnings
- Flash Flood Warnings
- Flood Warnings
- Flood Watches
- Winter Storm Warnings
- Winter Storm Watches
- Winter Weather Advisories
- Blizzard Warnings
- Extreme Cold Warnings
- Cold Weather Advisories
- Heat Advisories
- High Wind Warnings
- Wind Advisories
- Red Flag Warnings
- All Montana alerts