Moderate Extreme Weather ● Active
Dense Fog Advisory issued October 23 at 3:35AM CDT until October 23 at 10:00AM CDT by NWS Duluth MN, 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 mile or less in dense fog.
* WHERE...In Minnesota, Carlton and South St. Louis, Southern Cook,
and Southern Lake Counties. In Wisconsin, Ashland, Bayfield, and
Douglas Counties.
* WHEN...Until 10 AM CDT this morning.
* IMPACTS...Low visibility could make driving conditions hazardous.
* ADDITIONAL DETAILS...The worst conditions will be found close to
and around Lake Superior, as well as in the St. Louis River valley.
Measurements
| Coordinates | 39.9645, -100.8105 |
|---|---|
| Region | Southern Lake/North Shore; Southern Cook/North Shore; Carlton/South St. Louis; Douglas; Bayfield; Ashland |
| Location Precision | country |
| Issuing Authority | United States of America — us-noaa-nws-en |
| Cap Urgency | Expected |
| Cap Certainty | Likely |
| Cap Expires | 2026-10-23T10:00:00-05:00 |
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 reportAlso reported by: WMO
This event as JSON · API and licence
Source updated 59 minutes ago (Oct 23, 2026 08:36 UTC) · we last heard from WMO Alert Hub (national weather services) 49 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: Southern Lake/North Shore; Southern Cook/North Shore; Carlton/South St. Louis; Douglas; Bayfield; Ashland
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.