Glacier County, MT

Alerts

Advisory Area
County Line

Alerts are listed in order of start time and level of severity. Click on the alert title to read details for each alert.

In effect from Thursday 10/29 11:23 PM MDT – Friday 10/30 12:00 PM MDT

Issued by NWS Great Falls MT

What

Variable visibility down to one quarter 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 noon MDT Friday.

Impacts

Low visibility could make driving conditions hazardous.

Additional Details

Some roadways or bridges could be frost or ice covered and slippery.

What to Do

If driving, slow down, use your headlights, and leave plenty of distance ahead of you.

Areas Impacted

  • Northern High Plains
  • Eastern Glacier, Western Toole, and Central Pondera
  • Southern High Plains
  • Eastern Pondera and Eastern Teton
  • Cascade County below 5000ft
  • Gates of the Mountains

Tips to Stay Safe

A Dense Fog Advisory means that thick fog is happening now or very soon. It will limit visibility to less than a quarter mile, creating dangerous travel conditions. 

  • Limit driving or other travel if possible. 
  • If driving, slow down and plan for extra travel time to reach your destination. 
  • Use headlights and fog lights if you have them. Do not use high-beam lights, as the glare makes it more difficult for you to see. 
  • Leave plenty of distance between you and other vehicles. 

Briefings

No recent briefing available

From the Forecaster

Periods of Dense Fog

Created by the NWS Great Falls WFO

Low level easterly flow will bring an abundance of low clouds, periods of dense fog, and even some freezing drizzle through at least Saturday morning. Plan for variable visibility and instances of icy bridges and elevated surfaces, especially at night over central and north-central MT. #MTwx

Low level easterly flow will bring an abundance of low clouds, periods of dense fog, and even some freezing drizzle through at least Saturday morning. Plan for variable visibility and instances of icy bridges and elevated surfaces, especially at night over central and north-central MT.
Great Falls Area Forecast Discussion

Seven-day Weather Risk Overview

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