Moderate Extreme Weather ● Active
Dense Fog Advisory issued October 29 at 12:56PM MDT until October 29 at 3:00PM MDT by NWS Great Falls MT, United States of America
Loading live data… · Marker positions are approximate; severity is labelled in each popup. Sources: USGS, GDACS, NASA EONET, NOAA/NWS, EMSC.
* WHAT...Visibility one quarter to one half mile in dense freezing
fog.
* WHERE...Gates of the Mountains, Cascade County below 5000ft,
Eastern Glacier, Western Toole, and Central Pondera, Eastern
Pondera and Eastern Teton, Northern High Plains, and Southern High
Plains.
* WHEN...Until 3 PM MDT this afternoon.
* IMPACTS...Low visibility could make driving conditions hazardous.
* ADDITIONAL DETAILS...Some roadways or bridges could be frost
covered and slippery.
Measurements
| Coordinates | 39.9645, -100.8105 |
|---|---|
| Region | Northern High Plains; Eastern Glacier, Western Toole, and Central Pondera; Southern High Plains; Eastern Pondera and Eastern Teton; Cascade County below 50 |
| Location Precision | country |
| Issuing Authority | United States of America — us-noaa-nws-en |
| Cap Urgency | Expected |
| Cap Certainty | Likely |
| Cap Expires | 2026-10-29T15:00:00-06:00 |
Official source
Warnings courtesy of the issuing national meteorological service, via the WMO Alert Hub.
This is an official warning issued by the authority named above. Follow its instructions and those of your local emergency services.
Severity as published by WMO Alert Hub (national weather services).
View original reportThis event as JSON · API and licence
Source updated 1 hour ago (Oct 29, 2026 18:57 UTC) · we last heard from WMO Alert Hub (national weather services) 15 seconds ago
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About this location
The agency did not publish coordinates for this warning. The pin is the centre of the country, not the location of the event — read the area name, not the map, for where it applies.
Area as the agency stated it: Northern High Plains; Eastern Glacier, Western Toole, and Central Pondera; Southern High Plains; Eastern Pondera and Eastern Teton; Cascade County below 50
Official authorities in United States
If you are there, these are the bodies whose instructions apply. This site is not an emergency service and does not issue warnings.
More for United States →What to do
Follow the instructions issued by WMO Alert Hub (national weather services) and your local emergency services. The guidance below is background.
When thunder roars, go indoors — lightning risk outdoors, in vehicles, and first aid for strike victims.
Open Lightning Safety Guide →Earlier extreme weather events in United States
Severe and extreme events of the same kind, before this one. Listed for scale, not because they are connected to it.
Nearby & related events
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