Weather Service Report


977 
CDUS46 KSEW 290839
CLISEA


CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE WA                                  
138 AM PDT SAT APR 29 2017


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

...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR APRIL 28 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1945 TO 2017


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST     
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR     
                                                  NORMAL             
..................................................................
TEMPERATURE (F)                                                     
 YESTERDAY                                                           
  MAXIMUM         59    602 PM  76    1968  61     -2       63       
  MINIMUM         43    453 AM  31    1955  44     -1       50       
  AVERAGE         51                        52     -1       57      
                                                                     
PRECIPITATION (IN)                                                   
  YESTERDAY        T             0.44 1978   0.07  -0.07     0.00    
  MONTH TO DATE    3.99                      2.57   1.42     1.18    
  SINCE OCT 1     44.78                     30.76  14.02    44.51    
  SINCE JAN 1     24.38                     15.36   9.02    20.12    
                                                                     
SNOWFALL (IN)                                                        
  YESTERDAY        0.0           T    1986                   0.0     
  MONTH TO DATE    0.0                                       0.0     
  SINCE OCT 1     11.2                                        T      
  SINCE JUL 1     11.2                                        T      
  SNOW DEPTH       0                                                 
                                                                     
DEGREE DAYS                                                          
 HEATING                                                             
  YESTERDAY       14                        13      1        8       
  MONTH TO DATE  396                       415    -19      236       
  SINCE MAR 1    976                       989    -13      713       
  SINCE JUL 1   4149                      4243    -94     3557       
                                                                     
 COOLING                                                             
  YESTERDAY        0                         0      0        0       
  MONTH TO DATE    0                         0      0       14       
  SINCE MAR 1      0                         0      0       14       
  SINCE JAN 1      0                         0      0       14       
..................................................................


WIND (MPH)                                                           
  RESULTANT WIND SPEED   2   RESULTANT WIND DIRECTION  SW (210)      
  HIGHEST WIND SPEED    10   HIGHEST WIND DIRECTION     W (250)      
  HIGHEST GUST SPEED    15   HIGHEST GUST DIRECTION    SW (230)      
  AVERAGE WIND SPEED     5.4                                         

                                                                     
SKY COVER                                                            
  AVERAGE SKY COVER 0.7                                              

                                                                     
WEATHER CONDITIONS                                                  
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.                        
  LIGHT RAIN                                                         

                                                                     
RELATIVE HUMIDITY (PERCENT)                                          
 HIGHEST    96           500 AM                                     
 LOWEST     43           600 PM                                     
 AVERAGE    70                                                       

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

                                                                     
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR                    
 MAXIMUM TEMPERATURE (F)   61        80      1976                    
 MINIMUM TEMPERATURE (F)   44        31      1952                    

                                                                     
SUNRISE AND SUNSET                                                   
APRIL 29 2017.........SUNRISE   555 AM PDT   SUNSET   819 PM PDT   
APRIL 30 2017.........SUNRISE   554 AM PDT   SUNSET   820 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