459  
WWUS75 KRIW 202039  
NPWRIW  
 
URGENT - WEATHER MESSAGE  
NATIONAL WEATHER SERVICE RIVERTON WY  
139 PM MST MON JAN 20 2025  
 
WYZ002-211200-  
/O.NEW.KRIW.HW.W.0001.250121T0900Z-250122T0000Z/  
/O.CON.KRIW.CW.Y.0001.000000T0000Z-250121T1700Z/  
ABSAROKA MOUNTAINS-  
139 PM MST MON JAN 20 2025  
   
..COLD WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM MST TUESDAY
 
   
..HIGH WIND WARNING IN EFFECT FROM 2 AM TO 5 PM MST TUESDAY
 
 
* WHAT...FOR THE COLD WEATHER ADVISORY, VERY COLD WIND CHILL  
TEMPERATURES WILL DROP TO 20 TO 30 DEGREES BELOW ZERO OVERNIGHT.  
FOR THE HIGH WIND WARNING, NORTHWEST WINDS WILL INCREASE OVERNIGHT  
WITH GUSTS 65 TO 75 MPH POSSIBLE DURING THE DAY TUESDAY.  
 
* WHERE...ABSAROKA MOUNTAINS.  
 
* WHEN...FOR THE COLD WEATHER ADVISORY, UNTIL 10 AM MST TUESDAY. FOR  
THE HIGH WIND WARNING, FROM 2 AM TO 5 PM MST TUESDAY.  
 
* IMPACTS...TRAVEL WILL BE DIFFICULT, ESPECIALLY FOR HIGH PROFILE  
VEHICLES ALONG CHIEF JOSEPH HIGHWAY. STRONG WINDS CAN ALSO RESULT  
IN BLOWING SNOW AND REDUCED VISIBILITY. THE DANGEROUSLY COLD WIND  
CHILLS AS LOW AS 30 BELOW ZERO COULD CAUSE FROSTBITE ON EXPOSED  
SKIN IN AS LITTLE AS 10 MINUTES.  
 
* ADDITIONAL DETAILS...DAYTIME HIGHS TODAY WILL CLIMB INTO THE  
SINGLE DIGITS ABOVE ZERO. STRONGEST WINDS WILL OCCUR BETWEEN 5 AM  
AND NOON TUESDAY.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
USE EXTREME CAUTION IF YOU PLAN TO BE OUTDOORS. WEAR APPROPRIATE  
CLOTHING, A HAT, AND GLOVES.  
 

 
 

 
 
WYZ003-211200-  
/O.NEW.KRIW.HW.A.0001.250121T1200Z-250122T0000Z/  
/O.CON.KRIW.CW.Y.0001.000000T0000Z-250121T1700Z/  
CODY FOOTHILLS-  
INCLUDING THE CITIES OF CLARK, MEETEETSE, AND CODY  
139 PM MST MON JAN 20 2025  
   
..COLD WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM MST TUESDAY
 
   
..HIGH WIND WATCH IN EFFECT FROM 5 AM TO 5 PM TUESDAY
 
 
* WHAT...FOR THE COLD WEATHER ADVISORY, VERY COLD WIND CHILL  
TEMPERATURES WILL DROP TO 20 TO 30 DEGREES BELOW ZERO OVERNIGHT.  
FOR THE HIGH WIND WATCH, WEST WINDS 20 TO 30 MPH WITH GUSTS UP TO  
55 TO 60 MPH POSSIBLE.  
 
* WHERE...CODY FOOTHILLS.  
 
* WHEN...FOR THE COLD WEATHER ADVISORY, UNTIL 10 AM MST TUESDAY. FOR  
THE HIGH WIND WATCH, FROM 5 AM TUESDAY MORNING THROUGH 5 PM  
TUESDAY AFTERNOON.  
 
* IMPACTS...THE DANGEROUSLY COLD WIND CHILLS AS LOW AS 35 BELOW ZERO  
COULD CAUSE FROSTBITE ON EXPOSED SKIN IN AS LITTLE AS 10 MINUTES.  
 
* ADDITIONAL DETAILS...DAYTIME HIGHS TODAY WILL CLIMB TO NEAR ZERO  
OR UP TO THE SINGLE DIGITS ABOVE ZERO. STRONGEST WINDS WILL OCCUR  
TUESDAY 9 AM THROUGH 3 PM.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
MONITOR THE LATEST FORECASTS AND WARNINGS FOR UPDATES.  
 
USE CAUTION WHILE TRAVELING OUTSIDE. WEAR APPROPRIATE CLOTHING, A  
HAT, AND GLOVES.  
 
KEEP PETS INDOORS AS MUCH AS POSSIBLE.  
 
MAKE FREQUENT CHECKS ON OLDER FAMILY, FRIENDS, AND NEIGHBORS. ENSURE  
PORTABLE HEATERS ARE USED CORRECTLY. DO NOT USE GENERATORS OR GRILLS  
INSIDE.  
 

 
 

 
 
WYZ001-211200-  
/O.CON.KRIW.CW.Y.0001.000000T0000Z-250121T1700Z/  
YELLOWSTONE NATIONAL PARK-  
INCLUDING THE CITIES OF OLD FAITHFUL, MAMMOTH, AND LAKE  
139 PM MST MON JAN 20 2025  
   
..COLD WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM MST TUESDAY
 
 
* WHAT...VERY COLD WIND CHILL TEMPERATURES WILL DROP TO 20 TO 30  
DEGREES BELOW ZERO OVERNIGHT.  
 
* WHERE...YELLOWSTONE NATIONAL PARK.  
 
* WHEN...UNTIL 10 AM MST TUESDAY.  
 
* IMPACTS...THE DANGEROUSLY COLD WIND CHILLS AS LOW AS 30 BELOW ZERO  
COULD CAUSE FROSTBITE ON EXPOSED SKIN IN AS LITTLE AS 10 MINUTES.  
 
* ADDITIONAL DETAILS...DAYTIME HIGHS TODAY WILL CLIMB INTO THE  
SINGLE DIGITS ABOVE ZERO.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
USE EXTREME CAUTION IF YOU PLAN TO BE OUTDOORS. WEAR APPROPRIATE  
CLOTHING, A HAT, AND GLOVES.  
 

 
 

 
 
WYZ004>007-010-011-016>020-022-211200-  
/O.CON.KRIW.CW.Y.0001.000000T0000Z-250121T1700Z/  
NORTH BIGHORN BASIN-SOUTHWEST BIGHORN BASIN-SOUTHEAST BIGHORN  
BASIN-OWL CREEK AND BRIDGER MOUNTAINS-NORTHEAST JOHNSON COUNTY-  
SOUTHEAST JOHNSON COUNTY-UPPER WIND RIVER BASIN-WIND RIVER BASIN-  
LANDER FOOTHILLS-GREEN MOUNTAINS AND RATTLESNAKE RANGE-NATRONA  
COUNTY LOWER ELEVATIONS-CASPER MOUNTAIN-  
INCLUDING THE CITIES OF CASPER, BASIN, BUFFALO, RIVERTON, LANDER,  
LOVELL, GREYBULL, WORLAND, KAYCEE, DUBOIS, THERMOPOLIS, TEN  
SLEEP, SHELL, POWELL, SHOSHONI, AND JEFFREY CITY  
139 PM MST MON JAN 20 2025  
   
..COLD WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM MST TUESDAY
 
 
* WHAT...VERY COLD WIND CHILL TEMPERATURES WILL DROP TO 20 TO 30  
DEGREES BELOW ZERO OVERNIGHT.  
 
* WHERE...PORTIONS OF CENTRAL, NORTH CENTRAL, AND NORTHWEST WYOMING.  
 
* WHEN...UNTIL 10 AM MST TUESDAY.  
 
* IMPACTS...THE DANGEROUSLY COLD WIND CHILLS AS LOW AS 30 BELOW ZERO  
COULD CAUSE FROSTBITE ON EXPOSED SKIN IN AS LITTLE AS 10 MINUTES.  
 
* ADDITIONAL DETAILS...DAYTIME HIGHS TODAY WILL CLIMB TO NEAR ZERO  
OR UP TO THE SINGLE DIGITS ABOVE ZERO.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
USE EXTREME CAUTION IF YOU PLAN TO BE OUTDOORS. WEAR APPROPRIATE  
CLOTHING, A HAT, AND GLOVES.  
 
KEEP PETS INDOORS AS MUCH AS POSSIBLE.  
 
MAKE FREQUENT CHECKS ON OLDER FAMILY, FRIENDS, AND NEIGHBORS. ENSURE  
PORTABLE HEATERS ARE USED CORRECTLY. DO NOT USE GENERATORS OR GRILLS  
INSIDE.  
 

 
 

 
 
WYZ008-009-211200-  
/O.CON.KRIW.CW.Y.0001.000000T0000Z-250121T1200Z/  
BIGHORN MOUNTAINS WEST-BIGHORN MOUNTAINS SOUTHEAST-  
139 PM MST MON JAN 20 2025  
   
..COLD WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST TUESDAY
 
 
* WHAT...VERY COLD WIND CHILL TEMPERATURES WILL DROP TO 25 TO 35  
DEGREES BELOW ZERO AFTER SUNSET.  
 
* WHERE...BIGHORN MOUNTAINS. THIS INCLUDES POWDER RIVER PASS AND  
GRANITE PASS.  
 
* WHEN...UNTIL 5 AM MST TUESDAY.  
 
* IMPACTS...THE DANGEROUSLY COLD WIND CHILLS AS LOW AS 40 BELOW ZERO  
COULD CAUSE FROSTBITE ON EXPOSED SKIN IN AS LITTLE AS 10 MINUTES.  
 
* ADDITIONAL DETAILS...DAYTIME HIGHS TODAY WILL WARM UP SLIGHTLY BUT  
WILL REMAIN BELOW ZERO.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
USE EXTREME CAUTION IF YOU PLAN TO BE OUTDOORS. WEAR APPROPRIATE  
CLOTHING, A HAT, AND GLOVES.  
 

 
 

 
 
WYZ012-013-211200-  
/O.CON.KRIW.CW.Y.0001.000000T0000Z-250121T1700Z/  
TETON AND GROS VENTRE MOUNTAINS-JACKSON HOLE-  
INCLUDING THE CITIES OF JACKSON  
139 PM MST MON JAN 20 2025  
   
..COLD WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM MST TUESDAY
 
 
* WHAT...VERY COLD WIND CHILL TEMPERATURES WILL DROP TO 20 TO 30  
DEGREES BELOW ZERO OVERNIGHT.  
 
* WHERE...JACKSON HOLE AND TETON AND GROS VENTRE MOUNTAINS.  
 
* WHEN...UNTIL 10 AM MST TUESDAY.  
 
* IMPACTS...THE DANGEROUSLY COLD WIND CHILLS AS LOW AS 30 BELOW ZERO  
COULD CAUSE FROSTBITE ON EXPOSED SKIN IN AS LITTLE AS 10 MINUTES.  
 
* ADDITIONAL DETAILS...OUTDOOR RECREATIONISTS SHOULD DRESS IN LAYERS  
AND COVER EXPOSED SKIN. DAYTIME HIGHS TODAY WILL CLIMB TO NEAR  
ZERO OR UP TO THE SINGLE DIGITS ABOVE ZERO.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
USE EXTREME CAUTION IF YOU PLAN TO BE OUTDOORS. WEAR APPROPRIATE  
CLOTHING, A HAT, AND GLOVES.  
 
KEEP PETS INDOORS AS MUCH AS POSSIBLE.  
 
MAKE FREQUENT CHECKS ON OLDER FAMILY, FRIENDS, AND NEIGHBORS. ENSURE  
PORTABLE HEATERS ARE USED CORRECTLY. DO NOT USE GENERATORS OR GRILLS  
INSIDE.  
 

 
 

 
 
WYZ014-015-211200-  
/O.CON.KRIW.CW.Y.0001.000000T0000Z-250121T1700Z/  
WIND RIVER MOUNTAINS WEST-WIND RIVER MOUNTAINS EAST-  
139 PM MST MON JAN 20 2025  
   
..COLD WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM MST TUESDAY
 
 
* WHAT...VERY COLD WIND CHILL TEMPERATURES WILL DROP TO 25 TO 35  
DEGREES BELOW ZERO AFTER SUNSET.  
 
* WHERE...WIND RIVER MOUNTAINS.  
 
* WHEN...UNTIL 10 AM MST TUESDAY.  
 
* IMPACTS...THE DANGEROUSLY COLD WIND CHILLS AS LOW AS 40 BELOW ZERO  
COULD CAUSE FROSTBITE ON EXPOSED SKIN IN AS LITTLE AS 10 MINUTES.  
 
* ADDITIONAL DETAILS...OUTDOOR RECREATIONISTS SHOULD DRESS IN LAYERS  
AND COVER EXPOSED SKIN. DAYTIME HIGHS TODAY WILL CLIMB TO NEAR  
ZERO OR UP TO THE SINGLE DIGITS ABOVE ZERO.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
USE EXTREME CAUTION IF YOU PLAN TO BE OUTDOORS. WEAR APPROPRIATE  
CLOTHING, A HAT, AND GLOVES.  
 

 
 

 
 
WYZ025-026-030-211200-  
/O.CON.KRIW.CW.Y.0001.000000T0000Z-250121T1700Z/  
UPPER GREEN RIVER BASIN FOOTHILLS-UPPER GREEN RIVER BASIN-EAST  
SWEETWATER COUNTY-  
INCLUDING THE CITIES OF BIG PINEY, LA BARGE, FARSON, PINEDALE,  
AND WAMSUTTER  
139 PM MST MON JAN 20 2025  
   
..COLD WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM MST TUESDAY
 
 
* WHAT...VERY COLD WIND CHILL TEMPERATURES WILL DROP TO 25 TO 35  
DEGREES BELOW ZERO OVERNIGHT.  
 
* WHERE...EAST SWEETWATER COUNTY, UPPER GREEN RIVER BASIN, AND UPPER  
GREEN RIVER BASIN FOOTHILLS.  
 
* WHEN...UNTIL 10 AM MST TUESDAY.  
 
* IMPACTS...THE DANGEROUSLY COLD WIND CHILLS AS LOW AS 35 BELOW ZERO  
COULD CAUSE FROSTBITE ON EXPOSED SKIN IN AS LITTLE AS 10 MINUTES.  
 
* ADDITIONAL DETAILS...DAYTIME HIGHS TODAY WILL CLIMB TO NEAR ZERO  
OR UP TO THE SINGLE DIGITS ABOVE ZERO.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
USE EXTREME CAUTION IF YOU PLAN TO BE OUTDOORS. WEAR APPROPRIATE  
CLOTHING, A HAT, AND GLOVES.  
 
KEEP PETS INDOORS AS MUCH AS POSSIBLE.  
 
MAKE FREQUENT CHECKS ON OLDER FAMILY, FRIENDS, AND NEIGHBORS. ENSURE  
PORTABLE HEATERS ARE USED CORRECTLY. DO NOT USE GENERATORS OR GRILLS  
INSIDE.  
 

 
 

 
 
FOR MORE INFORMATION FROM THE NATIONAL WEATHER SERVICE, VISIT  
HTTPS://WEATHER.GOV/RIW/ .  
 
HENSLEY  
 
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