Weather Service Report


271 
CDUS46 KSEW 190830
CLISEA


CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE WA                                  
130 AM PDT SUN APR 19 2015


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

...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR APRIL 18 2015...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1945 TO 2015


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST     
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR     
                                                  NORMAL             
..................................................................
TEMPERATURE (F)                                                     
 YESTERDAY                                                           
  MAXIMUM         66    253 PM  77    1962  59      7       58       
  MINIMUM         47    459 AM  34    1964  42      5       42       
                                      1961                          
                                      1950                          
  AVERAGE         57                        51      6       50      
                                                                     
PRECIPITATION (IN)                                                   
  YESTERDAY        0.00          0.40 1970   0.09  -0.09     0.00    
  MONTH TO DATE    1.43                      1.77  -0.34     1.64    
  SINCE OCT 1     31.21                     29.96   1.25    27.88    
  SINCE JAN 1     14.83                     14.56   0.27    20.89    
                                                                     
SNOWFALL (IN)                                                        
  YESTERDAY        0.0          MM      MM                   0.0     
  MONTH TO DATE    0.0                                       0.0     
  SINCE OCT 1      0.8                                       4.0     
  SINCE JUL 1      0.8                                       4.0     
  SNOW DEPTH       0                                                 
                                                                     
DEGREE DAYS                                                          
 HEATING                                                             
  YESTERDAY        8                        14     -6       15       
  MONTH TO DATE  268                       280    -12      233       
  SINCE MAR 1    709                       854   -145      737       
  SINCE JUL 1   3212                      4108   -896     3812       
                                                                     
 COOLING                                                             
  YESTERDAY        0                         0      0        0       
  MONTH TO DATE    0                         0      0        0       
  SINCE MAR 1      0                         0      0        0       
  SINCE JAN 1      0                         0      0        0       
..................................................................


WIND (MPH)                                                           
  RESULTANT WIND SPEED   8   RESULTANT WIND DIRECTION   N (360)      
  HIGHEST WIND SPEED    16   HIGHEST WIND DIRECTION     N (360)      
  HIGHEST GUST SPEED    20   HIGHEST GUST DIRECTION     N (360)      
  AVERAGE WIND SPEED     8.7                                         

                                                                     
SKY COVER                                                            
  AVERAGE SKY COVER 0.1                                              

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

                                                                     
RELATIVE HUMIDITY (PERCENT)                                          
 HIGHEST    77           200 AM                                     
 LOWEST     34           500 PM                                     
 AVERAGE    56                                                       

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

                                                                     
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR                    
 MAXIMUM TEMPERATURE (F)   59        74      1956                    
                                             1950                    
 MINIMUM TEMPERATURE (F)   42        33      1961                    

                                                                     
SUNRISE AND SUNSET                                                   
APRIL 19 2015.........SUNRISE   614 AM PDT   SUNSET   804 PM PDT   
APRIL 20 2015.........SUNRISE   612 AM PDT   SUNSET   805 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