401  
WWUS45 KRIW 251235  
WSWRIW  
 
URGENT - WINTER WEATHER MESSAGE  
NATIONAL WEATHER SERVICE RIVERTON WY  
635 AM MDT TUE APR 25 2017  
 
...MODERATE TO OCCASIONALLY HEAVY SNOW FOR MANY MOUNTAIN  
LOCATIONS AND NORTHERN JOHNSON COUNTY TODAY...  
 
.AN APPROACHING UPPER LEVEL DISTURBANCE AND ASSOCIATED DEVELOPING  
COLD FRONT WILL BRING SNOW TO MANY OF THE MOUNTAINS OF WESTERN  
AND CENTRAL WYOMING IN ADDITION TO PORTIONS OF THE LOWER  
ELEVATIONS OF JOHNSON COUNTY TODAY.  
 
WYZ010-251800-  
/O.UPG.KRIW.WW.Y.0025.000000T0000Z-170426T0000Z/  
/O.NEW.KRIW.WS.W.0014.170425T1235Z-170426T0000Z/  
NORTHEAST JOHNSON COUNTY-  
INCLUDING THE CITY OF BUFFALO  
635 AM MDT TUE APR 25 2017  
   
..WINTER STORM WARNING IN EFFECT UNTIL 6 PM MDT THIS EVENING
 
 
THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A WINTER  
STORM WARNING FOR SNOW AND WIND WHICH IS IN EFFECT UNTIL 6 PM MDT  
THIS EVENING. THE WINTER WEATHER ADVISORY IS NO LONGER IN EFFECT.  
 
* TIMING...SNOW, HEAVY AT TIMES, WILL CONTINUE TODAY, ESPECIALLY  
THIS MORNING.  
 
* TOTAL SNOWFALL...6 TO 10 INCHES WITH LOCALLY HIGHER AMOUNTS NEAR  
BUFFALO.  
 
* WIND...NORTH 25 TO 40 MPH CAUSING CONSIDERABLE BLOWING AND  
DRIFTING SNOW WITH VISIBILITIES UNDER ONE QUARTER MILE AT  
TIMES.  
 
* MAIN IMPACT...HIGHWAYS WILL BE SLICK AND SNOW COVERED,  
INCLUDING INTERSTATES 25 AND 90. VISIBILITY COULD BE REDUCED TO  
UNDER ONE HALF MILE AT TIMES IN SNOW AND BLOWING SNOW.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW, AND OR  
BLOWING SNOW ARE EXPECTED OR OCCURRING. THIS COULD MAKE TRAVEL  
VERY HAZARDOUS OR IMPOSSIBLE. IF YOU MUST TRAVEL KEEP SOME FOOD,  
WATER, AND AN EXTRA FLASHLIGHT IN YOUR VEHICLE IN CASE OF AN  
EMERGENCY. CHECK THE LATEST ROAD CONDITIONS AT WYOROAD.INFO OR BY  
DIALING 5 1 1.  
 

 
 

 
 
WYZ012-251800-  
/O.CON.KRIW.WW.Y.0025.000000T0000Z-170425T1800Z/  
TETON AND GROS VENTRE MOUNTAINS-  
635 AM MDT TUE APR 25 2017  
 
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON MDT  
TODAY...  
 
* TIMING...OCCASIONAL SNOW WILL CONTINUE THIS MORNING BEFORE  
TAPERING OFF. AMOUNTS AS OF 3 AM THIS MORNING VARIED FROM 2 TO  
11 INCHES ACROSS THE AREA.  
 
* TOTAL SNOWFALL...6 TO 12 INCHES FOR MOST OF THE AREA.  
 
* MAIN IMPACT...HIGHWAYS WILL BECOME SLICK AND SNOW COVERED,  
INCLUDING TETON AND TOGWOTEE PASSES. VISIBILITY COULD BE  
REDUCED TO UNDER ONE HALF MILE AT TIMES.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
A WINTER WEATHER ADVISORY FOR SNOW MEANS PERIODS OF SNOW WILL  
CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED  
AND SLICK ROADS WITH LIMITED VISIBILITIES. SLOW DOWN, AND ALLOW  
EXTRA TIME TO REACH YOUR DESTINATION. CHECK THE LATEST ROAD  
CONDITIONS AT WYOROAD.INFO OR BY DIALING 5 1 1.  
 

 
 

 
 
WYZ001-002-251800-  
/O.CON.KRIW.WW.Y.0025.000000T0000Z-170425T1800Z/  
YELLOWSTONE NATIONAL PARK-ABSAROKA MOUNTAINS-  
INCLUDING THE CITIES OF LAKE, MAMMOTH, AND OLD FAITHFUL  
635 AM MDT TUE APR 25 2017  
 
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON MDT  
TODAY...  
 
* TIMING...OCCASIONAL SNOW WILL CONTINUE THIS MORNING BEFORE  
TAPERING OFF. AS OF 3 AM THIS MORNING, 2 TO 6 INCHES WAS  
REPORTED ACROSS THE AREA.  
 
* TOTAL SNOWFALL...4 TO 10 INCHES.  
 
* MAIN IMPACTS...HIGHWAYS WILL BECOME SLICK AND SNOW COVERED,  
INCLUDING CHIEF JOSEPH HIGHWAY. VISIBILITY COULD BE REDUCED TO  
UNDER ONE HALF MILE AT TIMES.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
A WINTER WEATHER ADVISORY FOR SNOW MEANS PERIODS OF SNOW WILL  
CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED  
AND SLICK ROADS WITH LIMITED VISIBILITIES. SLOW DOWN, AND ALLOW  
EXTRA TIME TO REACH YOUR DESTINATION. CHECK THE LATEST ROAD  
CONDITIONS AT WYOROAD.INFO OR BY DIALING 5 1 1.  
 

 
 

 
 
WYZ024-251800-  
/O.CON.KRIW.WW.Y.0025.000000T0000Z-170425T1800Z/  
SALT RIVER AND WYOMING RANGES-  
635 AM MDT TUE APR 25 2017  
 
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON MDT  
TODAY...  
 
* TIMING...OCCASIONAL SNOW WILL CONTINUE THIS MORNING BEFORE  
TAPERING OFF. AS OF 3 AM THIS MORNING, 2 TO 8 INCHES OF SNOW  
WAS REPORTED ACROSS THE AREA.  
 
* TOTAL SNOWFALL...4 TO 10 INCHES.  
 
* MAIN IMPACT...HIGHWAYS WILL BECOME SLICK, SLUSHY OR SNOW  
COVERED, INCLUDING SALT PASS. VISIBILITY COULD BE REDUCED TO  
UNDER ONE HALF MILE AT TIMES.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
A WINTER WEATHER ADVISORY FOR SNOW MEANS PERIODS OF SNOW WILL  
CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED  
AND SLICK ROADS WITH LIMITED VISIBILITIES. SLOW DOWN, AND ALLOW  
EXTRA TIME TO REACH YOUR DESTINATION. CHECK THE LATEST ROAD  
CONDITIONS AT WYOROAD.INFO OR BY DIALING 5 1 1.  
 

 
 

 
 
WYZ014-015-251800-  
/O.CON.KRIW.WW.Y.0025.000000T0000Z-170425T1800Z/  
WIND RIVER MOUNTAINS WEST-WIND RIVER MOUNTAINS EAST-  
635 AM MDT TUE APR 25 2017  
 
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON MDT  
TODAY...  
 
* TIMING...OCCASIONAL SNOW WILL CONTINUE THIS MORNING BEFORE  
TAPERING OFF. AS OF 3 AM THIS MORNING, 3 TO 5 INCHES OF SNOW  
WAS REPORTED ACROSS THE AREA.  
 
* TOTAL SNOWFALL...4 TO 11 INCHES.  
 
* MAIN IMPACT...HIGHWAYS WILL BECOME SLICK, SLUSHY OR SNOW  
COVERED, INCLUDING SOUTH PASS. VISIBILITY COULD BE REDUCED TO  
UNDER ONE HALF MILE AT TIMES.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
A WINTER WEATHER ADVISORY FOR SNOW MEANS PERIODS OF SNOW WILL  
CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED  
AND SLICK ROADS WITH LIMITED VISIBILITIES. SLOW DOWN, AND ALLOW  
EXTRA TIME TO REACH YOUR DESTINATION. CHECK THE LATEST ROAD  
CONDITIONS AT WYOROAD.INFO OR BY DIALING 5 1 1.  
 

 
 

 
 
WYZ008-009-251800-  
/O.CON.KRIW.WW.Y.0025.000000T0000Z-170426T0000Z/  
BIGHORN MOUNTAINS WEST-BIGHORN MOUNTAINS SOUTHEAST-  
635 AM MDT TUE APR 25 2017  
 
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM MDT THIS  
EVENING...  
 
* TIMING...PERIODS OF SNOW WILL CONTINUE TODAY BEFORE ENDING  
TUESDAY EVENING. THE HEAVIEST SNOW IS EXPECTED THIS MORNING ON  
EAST FACING SLOPES. AS OF 3 AM THIS MORNING, 4 TO 11 INCHES OF  
SNOW WAS REPORTED ACROSS THE AREA.  
 
* TOTAL SNOWFALL...6 TO 12 INCHES WITH 15 TO 18 INCHES POSSIBLE  
IN THE MOUNTAINS NORTH AND WEST OF BUFFALO.  
 
* MAIN IMPACT...HIGHWAYS WILL BECOME SLICK, SLUSHY OR SNOW  
COVERED, INCLUDING POWDER RIVER AND GRANITE PASSES. VISIBILITY  
COULD BE REDUCED TO UNDER ONE HALF MILE AT TIMES.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
A WINTER WEATHER ADVISORY FOR SNOW MEANS PERIODS OF SNOW WILL  
CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED  
AND SLICK ROADS WITH LIMITED VISIBILITIES. SLOW DOWN, AND ALLOW  
EXTRA TIME TO REACH YOUR DESTINATION. CHECK THE LATEST ROAD  
CONDITIONS AT WYOROAD.INFO OR BY DIALING 5 1 1.  
 

 
 

 
 
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