707  
WWUS85 KRIW 172012  
SPSRIW  
 
SPECIAL WEATHER STATEMENT  
NATIONAL WEATHER SERVICE RIVERTON WY  
112 PM MST WED JAN 17 2018  
 
WYZ001-002-012-013-181100-  
YELLOWSTONE NATIONAL PARK-ABSAROKA MOUNTAINS-  
TETON AND GROS VENTRE MOUNTAINS-JACKSON HOLE-  
INCLUDING THE CITIES OF LAKE, MAMMOTH, OLD FAITHFUL, AND JACKSON  
112 PM MST WED JAN 17 2018  
   
..ANOTHER DOSE OF SNOW RETURNING THURSDAY AND FRIDAY
 
 
MOIST SOUTHWEST FLOW WILL STREAM OVER NORTHWEST PORTIONS THURSDAY  
AFTERNOON, AS A COLD FRONT APPROACHES YELLOWSTONE FROM SOUTHWEST  
MONTANA. LIGHT SNOW SHOWERS WILL BE POSSIBLE FROM JACKSON  
NORTHWARD INTO YELLOWSTONE THURSDAY AFTERNOON, WITH THE BEST  
CHANCES OCCURRING OVER SOUTHWEST YELLOWSTONE. THIS WILL CONTINUE  
INTO THE EVENING HOURS, WITH MODERATE TO HEAVY SNOW POSSIBLE OVER  
THE PARK AFTER MIDNIGHT. LIGHT TO MODERATE SNOW WILL ALSO BE  
POSSIBLE OVER THE TETONS BY THIS TIME. LIGHT TO MODERATE SNOW WILL  
THEN SPREAD SOUTHWARD DURING THE MORNING HOURS FRIDAY AND  
ENCOMPASS THE WESTERN MOUNTAINS AND VALLEYS THROUGH THE AFTERNOON.  
7 TO 10 INCHES, WITH LOCALIZED AMOUNTS UP TO 1 FOOT, ARE EXPECTED  
ACROSS YELLOWSTONE. 6 TO 9 INCHES ARE EXPECTED IN THE TETONS AND  
ABSAROKAS, WITH 3 TO 5 INCHES IN JACKSON VALLEY AND 1 TO 2 INCHES  
IN STAR VALLEY.  
 

 
 
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