AFOS product CLIAPC
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CDUS46 KMTR 120953
CLIAPC


CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA                      
153 AM PST MON DEC 12 2016


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

...THE NAPA AIRPORT  CLIMATE SUMMARY FOR DECEMBER 11 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         52    412 PM  64    2014  56     -4       58       
                                      2005                          
  MINIMUM         38    253 AM  25    2013  36      2       39       
  AVERAGE         45                        46     -1       49      
                                                                     
PRECIPITATION (IN)                                                   
  YESTERDAY        0.00                                      0.04    
  MONTH TO DATE    0.93                                      0.32    
  SINCE OCT 1      5.68                                      1.73    
  SINCE JAN 1     20.35                                      5.83    
                                                                     
DEGREE DAYS                                                          
 HEATING                                                             
  YESTERDAY       20                                        16       
  MONTH TO DATE  175                                       155       
  SINCE DEC 1    175                                       155       
  SINCE JUL 1    679                                       696       
                                                                     
 COOLING                                                             
  YESTERDAY        0                                         0       
  MONTH TO DATE    0                                         0       
  SINCE DEC 1      0                                         0       
  SINCE JAN 1    186                                       378       
..................................................................


WIND (MPH)                                                           
  RESULTANT WIND SPEED   0   RESULTANT WIND DIRECTION   S (180)      
  HIGHEST WIND SPEED     7   HIGHEST WIND DIRECTION    NW (320)      
  HIGHEST GUST SPEED     8   HIGHEST GUST DIRECTION    NW (330)      
  AVERAGE WIND SPEED     1.5                                         

                                                                     
SKY COVER                                                            
  POSSIBLE SUNSHINE  MM                                              
  AVERAGE SKY COVER 0.4                                              

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

                                                                     
RELATIVE HUMIDITY (PERCENT)                                          
 HIGHEST    96           100 AM                                     
 LOWEST     77           200 PM                                     
 AVERAGE    87                                                       

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

                                                                     
THE NAPA AIRPORT  CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR                    
 MAXIMUM TEMPERATURE (F)   56        60      2010                    
 MINIMUM TEMPERATURE (F)   36        26      2013                    

                                                                     
SUNRISE AND SUNSET                                                   
DECEMBER 12 2016......SUNRISE   717 AM PST   SUNSET   449 PM PST   
DECEMBER 13 2016......SUNRISE   718 AM PST   SUNSET   450 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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