US weather alerts · NWS
Dense Fog Advisories right now
Updated
Yes: 1 Dense Fog Advisory in effect in 1 state Montana (1)
Every active Dense Fog Advisory in the United States from the National Weather Service, refreshed every few minutes, with what it means and what to do.
- Active dense fog advisorys
- 1
- States affected
- 1 MT
- Next to expire
- Mon 12:00 pm MDT
- Most recently issued
- Sun 1:05 pm MDT
- Winter Weather Advisories now
- 6
- All NWS alerts now
- 415
Are there any dense fog advisorys right now?
The National Weather Service has 1 active Dense Fog Advisory as of Sun 7:18 pm EDT, covering parts of Montana.
There are also 6 Winter Weather Advisories in effect.
The longest-running ends Mon 12:00 pm MDT for Elkhorn and Boulder Mountains; Canyon Ferry Area; Missouri Headwaters; Madison River Valley; Gallatin Valley; Northwest....
Active Dense Fog Advisories
| State | Area (counties / zones) | Issued | Expires | Cities |
|---|---|---|---|---|
| MT | Elkhorn and Boulder Mountains; Canyon Ferry Area; Missouri Headwaters; Madison River Valley; Gallatin Valley; Northwest Beaverhead County; Beaverhead and... | Sun 1:05 pm MDT | Mon 12:00 pm MDT | Bozeman |
Times are in the local time of the (first) state the alert covers. City links show places on our list inside the alert area (by polygon or NWS zone code).
What a Dense Fog Advisory means
Fog is reducing visibility to a quarter mile (400 m) or less over a widespread area.
What to do during a Dense Fog Advisory
Drive slowly with low-beam headlights, leave extra distance and expect flight delays.
Watch vs warning vs advisory
A watch means the ingredients are in place and the hazard is possible: be prepared. A warning means the hazard is happening, imminent or very likely: act now to protect life and property. An advisory is for less severe conditions that are still a nuisance or risky, and a statement is information that falls below those levels.
The companion product to the Dense Fog Advisory is the Winter Weather Advisory, with 6 active now.
Other alert types right now
- Tornado Warnings 0 active
- Tornado Watches 0 active
- Severe Thunderstorm Warnings 1 active
- Severe Thunderstorm Watches 0 active
- Winter Storm Warnings 2 active
- Winter Storm Watches 1 active
- Winter Weather Advisories 6 active
- Blizzard Warnings 0 active
- Ice Storm Warnings 0 active
- Flood Warnings 15 active
- Flash Flood Warnings 1 active
- Flood Watches 3 active
- Heat Advisories 0 active
- Extreme Heat Warnings 0 active
- Extreme Cold Warnings 0 active
- Hurricane Warnings 0 active
- Tropical Storm Warnings 0 active
- High Wind Warnings 0 active
- Red Flag Warnings 0 active
- Special Weather Statements 2 active