Weather Service Report


546 
CDUS46 KSEW 070829
CLISEA


CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE WA                                  
1229 AM PST WED DEC 7 2016


................................... 

...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR DECEMBER 6 2016...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1945 TO 2016


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST     
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR     
                                                  NORMAL             
..................................................................
TEMPERATURE (F)                                                     
 YESTERDAY                                                           
  MAXIMUM         40    230 PM  57    1965  46     -6       55       
  MINIMUM         31    746 AM  19    1956  36     -5       45       
  AVERAGE         36                        41     -5       50      
                                                                     
PRECIPITATION (IN)                                                   
  YESTERDAY        0.00          1.39 1970   0.18  -0.18     0.44    
  MONTH TO DATE    0.87                      1.16  -0.29     2.22    
  SINCE OCT 1     17.40                     11.21   6.19    15.40    
  SINCE JAN 1     42.18                     33.30   8.88    35.84    
                                                                     
SNOWFALL (IN)                                                        
  YESTERDAY        0.0           0.3  1980                   0.0     
  MONTH TO DATE    T                                         0.0     
  SINCE OCT 1      T                                         0.0     
  SINCE JUL 1      T                                         0.0     
  SNOW DEPTH       0                                                 
                                                                     
DEGREE DAYS                                                          
 HEATING                                                             
  YESTERDAY       29                        24      5       15       
  MONTH TO DATE  142                       140      2      102       
  SINCE DEC 1    142                       140      2      102       
  SINCE JUL 1    993                      1323   -330     1113       
                                                                     
 COOLING                                                             
  YESTERDAY        0                         0      0        0       
  MONTH TO DATE    0                         0      0        0       
  SINCE DEC 1      0                         0      0        0       
  SINCE JAN 1    291                       189    102      474       
..................................................................


WIND (MPH)                                                           
  RESULTANT WIND SPEED   7   RESULTANT WIND DIRECTION   N (20)       
  HIGHEST WIND SPEED    18   HIGHEST WIND DIRECTION     N (350)      
  HIGHEST GUST SPEED    22   HIGHEST GUST DIRECTION     N (350)      
  AVERAGE WIND SPEED     7.5                                         

                                                                     
SKY COVER                                                            
  AVERAGE SKY COVER 0.6                                              

                                                                     
WEATHER CONDITIONS                                                  
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.                        
  FOG                                                                
  FOG W/VISIBILITY <= 1/4 MILE                                       

                                                                     
RELATIVE HUMIDITY (PERCENT)                                          
 HIGHEST   100          1200 AM                                     
 LOWEST     59           400 PM                                     
 AVERAGE    80                                                       

..........................................................

                                                                     
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR                    
 MAXIMUM TEMPERATURE (F)   46        58      2014                    
 MINIMUM TEMPERATURE (F)   36        18      1972                    

                                                                     
SUNRISE AND SUNSET                                                   
DECEMBER  7 2016......SUNRISE   743 AM PST   SUNSET   418 PM PST   
DECEMBER  8 2016......SUNRISE   744 AM PST   SUNSET   418 PM PST   

                                                                    
-  INDICATES NEGATIVE NUMBERS.                                      
R  INDICATES RECORD WAS SET OR TIED.                                
MM INDICATES DATA IS MISSING.                                       
T  INDICATES TRACE AMOUNT.                                          




$$


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Western Regional Climate Center, wrcc@dri.edu