651  
CDUS45 KRIW 170037  
CLIP60  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE RIVERTON WY  
535 PM MST SAT DEC 16 2017  
 
   
...............................
 
 
   
..THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR DECEMBER 16 2017
 
 
VALID TODAY AS OF 0500 PM LOCAL TIME.  
 
CLIMATE NORMAL PERIOD 1981 TO 2010  
CLIMATE RECORD PERIOD 1998 TO 2017  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
..............................................................
 
 
TEMPERATURE (F)  
TODAY  
MAXIMUM 23 MM 33 1998 23 0 28  
MINIMUM 17 1200 AM -18 2016 3 14 -18  
AVERAGE 20  
 
PRECIPITATION (IN)  
TODAY 0.23R 0.12 2009 0.05 0.18 MM  
MONTH TO DATE 0.75 0.73 0.02 2.10  
SINCE DEC 1 0.75 0.73 0.02 2.10  
SINCE JAN 1 32.25 19.53 12.72 23.10  
 
DEGREE DAYS  
HEATING  
TODAY 45 52 -7 60  
MONTH TO DATE 784 809 -25 876  
SINCE DEC 1 784 809 -25 876  
SINCE JUL 1 4153 4129 24 4020  
 
COOLING  
TODAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE DEC 1 0 0 0 0  
SINCE JAN 1 0 0 0 0    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 5 HIGHEST WIND DIRECTION NW (310)  
HIGHEST GUST SPEED MM HIGHEST GUST DIRECTION MM  
AVERAGE WIND SPEED 0.5  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.0  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 600 AM  
LOWEST 84 400 PM  
AVERAGE 92  
   
......................................................
 
 
 
THE LAKE YELLOWSTONE WY CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 23 35 2013  
MINIMUM TEMPERATURE (F) 3 -28 2016  
 
 
SUNRISE AND SUNSET  
DECEMBER 16 2017......SUNRISE 752 AM MST SUNSET 443 PM MST  
DECEMBER 17 2017......SUNRISE 753 AM MST SUNSET 443 PM MST  
 
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
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