116
WWUS75 KSLC 210621
NPWSLC

URGENT - WEATHER MESSAGE
National Weather Service Salt Lake City UT
1121 PM MST Thu Nov 20 2025

UTZ103-107-211700-
/O.EXA.KSLC.FG.Y.0004.000000T0000Z-251121T1700Z/
Eastern Box Elder County-Cache Valley/Utah Portion-
Including the following locations - Logan, Snowville, Brigham
City, and Smithfield
1121 PM MST Thu Nov 20 2025

...DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM MST FRIDAY...

* WHAT...Visibility less than a quarter mile in dense fog.

* WHERE...Cache Valley/Utah Portion and Eastern Box Elder County
  including the I-15 corridor from Brigham City to the Utah/Idaho
  state line.

* WHEN...Until 10 AM MST Friday.

* IMPACTS...Low visibility could make driving conditions hazardous.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

WYZ021-211700-
/O.CON.KSLC.FG.Y.0004.000000T0000Z-251121T1700Z/
Southwest Wyoming-
Including the following locations - Evanston and Lyman
1121 PM MST Thu Nov 20 2025

...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 10 AM MST FRIDAY...

* WHAT...Visibility less than a quarter mile in dense fog.

* WHERE...Southwest Wyoming.

* WHEN...Until 10 AM MST Friday.

* IMPACTS...Low visibility could make driving conditions hazardous.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

For more information from the National Weather Service visit
https://weather.gov/saltlakecity.

For information on potential travel impacts visit
http://udottraffic.utah.gov

CRK