AFOS product CLIAPC
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CDUS46 KMTR 220858
CLIAPC


CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA                      
1258 AM PST THU DEC 22 2016


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

...THE NAPA AIRPORT  CLIMATE SUMMARY FOR DECEMBER 21 2016...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1998 TO 2016


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST     
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR     
                                                  NORMAL             
..................................................................
TEMPERATURE (F)                                                     
 YESTERDAY                                                           
  MAXIMUM         63    313 PM  71    1999  55      8       58       
  MINIMUM         35   1150 PM  21    1998  36     -1       47       
  AVERAGE         49                        45      4       53      
                                                                     
PRECIPITATION (IN)                                                   
  YESTERDAY        0.00                                      0.75    
  MONTH TO DATE    3.54                                      2.61    
  SINCE OCT 1      8.29                                      4.02    
  SINCE JAN 1     22.96                                      8.12    
                                                                     
DEGREE DAYS                                                          
 HEATING                                                             
  YESTERDAY       16                                        12       
  MONTH TO DATE  344                                       347       
  SINCE DEC 1    344                                       347       
  SINCE JUL 1    848                                       888       
                                                                     
 COOLING                                                             
  YESTERDAY        0                                         0       
  MONTH TO DATE    0                                         0       
  SINCE DEC 1      0                                         0       
  SINCE JAN 1    186                                       378       
..................................................................


WIND (MPH)                                                           
  RESULTANT WIND SPEED   3   RESULTANT WIND DIRECTION   E (90)       
  HIGHEST WIND SPEED    16   HIGHEST WIND DIRECTION     E (90)       
  HIGHEST GUST SPEED    19   HIGHEST GUST DIRECTION     E (100)      
  AVERAGE WIND SPEED     4.3                                         

                                                                     
SKY COVER                                                            
  POSSIBLE SUNSHINE  MM                                              
  AVERAGE SKY COVER 0.0                                              

                                                                     
WEATHER CONDITIONS                                                  
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.                        
  FOG                                                                

                                                                     
RELATIVE HUMIDITY (PERCENT)                                          
 HIGHEST    92          1100 PM                                     
 LOWEST     48           300 PM                                     
 AVERAGE    70                                                       

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

                                                                     
THE NAPA AIRPORT  CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR                    
 MAXIMUM TEMPERATURE (F)   55        68      1999                    
 MINIMUM TEMPERATURE (F)   36        19      1998                    

                                                                     
SUNRISE AND SUNSET                                                   
DECEMBER 22 2016......SUNRISE   723 AM PST   SUNSET   453 PM PST   
DECEMBER 23 2016......SUNRISE   723 AM PST   SUNSET   454 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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