Hazardous Weather Outlook
Issued by NWS Salt Lake City, UT

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FLUS45 KSLC 122344
HWOSLC

Hazardous Weather Outlook
National Weather Service Salt Lake City UT
444 PM MST Tue Dec 12 2017

UTZ001>016-019>021-517-518-WYZ021-131300-
Cache Valley/Utah Portion-Northern Wasatch Front-
Salt Lake and Tooele Valleys-Southern Wasatch Front-
Great Salt Lake Desert and Mountains-Wasatch Mountain Valleys-
Wasatch Mountains I-80 North-Wasatch Mountains South of I-80-
Western Uinta Mountains-Wasatch Plateau/Book Cliffs-
Western Uinta Basin-Castle Country-San Rafael Swell-
Sanpete/Sevier Valleys-West Central Utah-Southwest Utah-
Utahs Dixie and Zion National Park-South Central Utah-
Glen Canyon Recreation Area/Lake Powell-Central Mountains-
Southern Mountains-Southwest Wyoming-
444 PM MST Tue Dec 12 2017

This Hazardous Weather Outlook is for the western two thirds of
Utah and southwest Wyoming.

.DAY ONE...Tonight

Widespread fog, locally dense, will remain in place across the
northern and central Wasatch Front, the Cache and Bear Lake
valleys, and over portions of the northwest desert including the
I-80 corridor. Travelers will occasionally encounter visibilities
below a quarter mile overnight. Ice crystals will also seed out
of the fog, leading to slick travel conditions along area roadways.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

The strong valley inversions will continue through at least
Friday. A weak weather disturbance will graze northern Utah and
southwest Wyoming Wednesday night. The disturbance may dissipate
the fog in the Cache and Bear Lake valleys for a short time before
it returns Thursday night. Widespread fog and haze will persist
across the lower northwest valleys and Wasatch front through the
end of the week. Urban haze and poor air quality will also
continue through Friday due to the strong and persistent valley
inversions across northern Utah.

A stronger weather disturbance will advance southeast from the
Pacific Northwest and then across the outlook area late Friday
night through Saturday. The surface cold front associated with
this feature along with significantly colder temperatures aloft
will likely break down the valley inversions and sweep much of the
fog and haze out of northern Utah for the weekend.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

$$

For more information from NOAA/s National Weather Service visit...
http://weather.gov/saltlakecity

For information on potential road travel impacts visit...
http://www.udottraffic.utah.gov/roadweatherforecast.aspx


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