Dense Fog Advisory in Southern High Plains

Dense Fog Advisory issued December 24 at 7:50PM MST until December 24 at 11:00PM MST by NWS Great Falls MT

• Event Start: 2025-12-24T19:50:00-07:00
• Event End: 2025-12-24T23:00:00-07:00
• Event Certainty: Likely
• Event Severity: Moderate

Event Description

• WHAT: Visibility a quarter mile or less in dense freezing fog.
• WHERE: A portion of north central Montana.
• WHEN: Until 11 PM MST this evening.
• IMPACTS: Low visibility could make driving conditions hazardous. Icy roads and sidewalks are possible due to a slow buildup of ice.

Event Instructions

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

Winter Weather Advisory in Southern High Plains

Winter Weather Advisory issued December 24 at 2:02PM MST until December 25 at 5:00AM MST by NWS Great Falls MT

• Event Start: 2025-12-24T19:00:00-07:00
• Event End: 2025-12-25T05:00:00-07:00
• Event Certainty: Likely
• Event Severity: Moderate

Event Description

• WHAT: Freezing rain expected. Total ice accumulations around a light glaze.
• WHERE: Eastern Toole and Liberty Counties, Eastern Pondera and Eastern Teton Counties, Southern High Plains, Western and Central Chouteau County, and Cascade County below 5000ft.
• WHEN: From 7 PM this evening to 5 AM MST Thursday.
• IMPACTS: Roads, and especially bridges and overpasses, will likely become slick and hazardous.
• ADDITIONAL DETAILS: Ice may accumulate on power lines and cause power outages.

Event Instructions

Remember, a Winter Weather Advisory means that there is at least an 80% chance of minor impacts due to winter weather conditions during the advisory period.