Minnesota, Wisconsin Dense Fog Advisory | Effective 04/15/2026 19:40

Headline: 
Dense Fog Advisory issued April 15 at 9:40PM CDT until April 16 at 10:00AM CDT by NWS Duluth MN
Event: 
Dense Fog Advisory
Urgency: 
Expected
Effective: 
April 15, 2026 - 7:40pm
Expires: 
April 16, 2026 - 7:45am
Description: 
* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...In Minnesota, Carlton and South St. Louis, Southern Cook and Southern Lake Counties. In Wisconsin, Ashland, Bayfield, Douglas, and Iron Counties. This includes the Tribal Lands of the Red Cliff Band, the Bad River Reservation, the northwestern area of the Lac du Flambeau Band, the Grand Portage Reservation and the Fond du Lac Band. Other locations including the Apostle Islands National Lakeshore and Madeline Island. * WHEN...Until 10 AM CDT Thursday. * IMPACTS...Low visibility could make driving conditions hazardous. * ADDITIONAL DETAILS...Fog will develop tonight around Lake Superior and will be dense overnight. Visibility will improve Thursday morning.
Instruction: 
If driving, slow down, use your low-beam headlights and fog lights, and leave plenty of distance ahead of you.
Area Description: 
Southern Lake/North Shore; Southern Cook/North Shore; Carlton/South St. Louis; Douglas; Bayfield; Ashland; Iron
Forcast Office: 
NWS Duluth MN