357  
FLUS45 KSLC 131412  
HWOSLC  
 
HAZARDOUS WEATHER OUTLOOK  
NATIONAL WEATHER SERVICE SALT LAKE CITY UT  
712 AM MST WED DEC 13 2017  
 
UTZ001>016-019>021-517-518-WYZ021-141300-  
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-  
712 AM MST WED DEC 13 2017  
 
THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN TWO THIRDS OF  
UTAH AND SOUTHWEST WYOMING.  
   
DAY ONE
 
TODAY AND 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
 
THURSDAY THROUGH TUESDAY  
 
INVERSION CONDITIONS WILL CONTINUE THROUGH AT LEAST FRIDAY.  
EXPECT AREAS OF FOG TO PERSIST ACROSS MANY OF THE LOWER NORTHERN  
VALLEYS 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.  
 
THE NEXT REAL CHANCE TO SCOUR OUT THE FOG AND HAZE WILL COME  
FRIDAY NIGHT THROUGH SATURDAY. A WEATHER DISTURBANCE APPROACHING  
FROM THE NORTHWEST WILL BRING ENOUGH WIND AND COLDER AIR ALOFT TO  
BREAK DOWN THE INVERSIONS AND PUSH FOG AND HAZE OUT OF THE AREA.  
IN ADDITION, ACCUMULATING SNOW IS EXPECTED ACROSS THE MOUNTAINS OF  
NORTHERN UTAH WITH THIS SYSTEM, WITH PERHAPS AN INCH OR TWO IN THE  
VALLEYS AS WELL.  
   
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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