Weather Service Report


390 
CDUS46 KSEW 160830
CLISEA


CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE WA                                  
130 AM PDT TUE SEP 16 2014


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

...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 15 2014...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1945 TO 2014


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST     
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR     
                                                  NORMAL             
..................................................................
TEMPERATURE (F)                                                     
 YESTERDAY                                                           
  MAXIMUM         87    433 PM  93    1967  71     16       66       
  MINIMUM         54    604 AM  42    1952  52      2       58       
  AVERAGE         71                        62      9       62      
                                                                     
PRECIPITATION (IN)                                                   
  YESTERDAY        0.00          0.69 1959   0.05  -0.05     0.13    
  MONTH TO DATE    0.12                      0.64  -0.52     2.16    
  SINCE OCT 1     37.00                     36.63   0.37    43.40    
  SINCE JAN 1     30.01                     21.23   8.78    21.56    
                                                                     
DEGREE DAYS                                                          
 HEATING                                                             
  YESTERDAY        0                         4     -4        3       
  MONTH TO DATE   11                        43    -32        6       
  SINCE SEP 1     11                        43    -32        6       
  SINCE JUL 1     34                       128    -94       21       
                                                                     
 COOLING                                                             
  YESTERDAY        6                         1      5        0       
  MONTH TO DATE   35                        15     20       55       
  SINCE SEP 1     35                        15     20       55       
  SINCE JAN 1    358                       183    175      385       
..................................................................


WIND (MPH)                                                           
  RESULTANT WIND SPEED   2   RESULTANT WIND DIRECTION  NW (300)      
  HIGHEST WIND SPEED     9   HIGHEST WIND DIRECTION     W (290)      
  HIGHEST GUST SPEED    12   HIGHEST GUST DIRECTION     W (280)      
  AVERAGE WIND SPEED     2.6                                         

                                                                     
SKY COVER                                                            
  AVERAGE SKY COVER 0.3                                              

                                                                     
WEATHER CONDITIONS                                                  
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.                        
  NO SIGNIFICANT WEATHER WAS OBSERVED.                               

                                                                     
RELATIVE HUMIDITY (PERCENT)                                          
 HIGHEST    83           600 AM                                     
 LOWEST     19           400 PM                                     
 AVERAGE    51                                                       

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

                                                                     
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR                    
 MAXIMUM TEMPERATURE (F)   71        91      1967                    
 MINIMUM TEMPERATURE (F)   52        44      1992                    
                                             1952                    

                                                                     
SUNRISE AND SUNSET                                                   
SEPTEMBER 16 2014.....SUNRISE   648 AM PDT   SUNSET   719 PM PDT   
SEPTEMBER 17 2014.....SUNRISE   649 AM PDT   SUNSET   717 PM PDT   

                                                                    
-  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