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Hazardous Weather Outlook

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

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.


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


For more information from NOAA/s National Weather Service visit...

For information on potential road travel impacts visit...

Hazardous Weather Outlook
National Weather Service Riverton WY
250 AM MST Tue Dec 12 2017

Yellowstone National Park-Absaroka Mountains-Cody Foothills-
North Big Horn Basin-Southwest Big Horn Basin-
Southeast Big Horn Basin-Owl Creek and Bridger Mountains-
Bighorn Mountains West-Bighorn Mountains Southeast-
Northeast Johnson County-Southeast Johnson County-
Teton and Gros Ventre Mountains-Jackson Hole-
Wind River Mountains West-Wind River Mountains East-
Upper Wind River Basin-Wind River Basin-Lander Foothills-
Green Mountains and Rattlesnake Range-
Natrona County Lower Elevations-Casper Mountain-Star Valley-
Salt River and Wyoming Ranges-Upper Green River Basin Foothills-
Upper Green River Basin-South Lincoln County-
Rock Springs and Green River-Flaming Gorge-East Sweetwater County-
250 AM MST Tue Dec 12 2017

This Hazardous Weather Outlook is for Western and Central Wyoming.

.DAY ONE...Today and Tonight.

Very patchy freezing fog will be possible in the Jackson or Star
Valleys this morning.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Thursday night and Friday...High winds possible along the Cody

Friday night and Saturday...Snow is expected to impact western Wyoming
Friday night spilling east of the Divide late Friday night and Saturday
morning. This system has the potential to bring light to moderate amounts
of snowfall. Please stay tuned for more details.


Spotter activation will not be needed today or tonight.


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Silver Spring, MD 20910
Page last modified: June 2, 2009
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