Moderate Extreme Weather ● Active
Special Weather Statement issued October 24 at 8:24AM 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.
Patchy dense fog has developed this morning along the Missouri
Headwaters and into the Gallatin Valley. Visibility dropping to
below a half mile will be possible through the mid morning.
Those traveling, especially on I-90 between Belgrade and Three
Forks should be alert in rapid reductions in visibility.
Reminder, slow down and use low beam headlights when driving
through fog.
Measurements
| Coordinates | 39.9645, -100.8105 |
|---|---|
| Region | Missouri Headwaters; Gallatin Valley |
| Location Precision | country |
| Issuing Authority | United States of America — us-noaa-nws-en |
| Cap Urgency | Expected |
| Cap Certainty | Observed |
| Cap Expires | 2026-10-24T10:00:00-06:00 |
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 57 minutes ago (Oct 24, 2026 14:26 UTC) · we last heard from WMO Alert Hub (national weather services) 41 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: Missouri Headwaters; Gallatin Valley
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
Disclaimer: figures are automatic feeds from the named agencies and may be revised. Do not use this page for life-safety decisions — follow official local emergency services.