AFOS product CLIAPC
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CDUS46 KMTR 100837
CLIAPC


CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA                      
1237 AM PST TUE DEC 10 2019


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

...THE NAPA AIRPORT  CLIMATE SUMMARY FOR DECEMBER 9 2019...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1998 TO 2019


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST     
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR     
                                                  NORMAL             
..................................................................
TEMPERATURE (F)                                                     
 YESTERDAY                                                           
  MAXIMUM         53    625 PM  70    2012  56     -3       54       
  MINIMUM         41    625 AM  19    2013  36      5       41       
  AVERAGE         47                        46      1       48      
                                                                     
PRECIPITATION (IN)                                                   
  YESTERDAY        0.00                                      0.00    
  MONTH TO DATE    2.75                                      0.63    
  SINCE OCT 1      3.56                                      1.89    
  SINCE JAN 1     26.22                                     14.66    
                                                                     
DEGREE DAYS                                                          
 HEATING                                                             
  YESTERDAY       18                                        17       
  MONTH TO DATE  100                                       145       
  SINCE DEC 1    100                                       145       
  SINCE JUL 1    700                                       712       
                                                                     
 COOLING                                                             
  YESTERDAY        0                                         0       
  MONTH TO DATE    0                                         0       
  SINCE DEC 1      0                                         0       
  SINCE JAN 1    346                                       182       
..................................................................


WIND (MPH)                                                           
  RESULTANT WIND SPEED   3   RESULTANT WIND DIRECTION  NW (330)      
  HIGHEST WIND SPEED     9   HIGHEST WIND DIRECTION     N (20)       
  HIGHEST GUST SPEED    11   HIGHEST GUST DIRECTION     W (280)      
  AVERAGE WIND SPEED     3.1                                         

                                                                     
SKY COVER                                                            
  POSSIBLE SUNSHINE  MM                                              
  AVERAGE SKY COVER 1.0                                              

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

                                                                     
RELATIVE HUMIDITY (PERCENT)                                          
 HIGHEST   100           100 AM                                     
 LOWEST     83           600 PM                                     
 AVERAGE    92                                                       

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

                                                                     
THE NAPA AIRPORT  CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR                    
 MAXIMUM TEMPERATURE (F)   56        66      2017                    
 MINIMUM TEMPERATURE (F)   36        21      2013                    

                                                                     
SUNRISE AND SUNSET                                                   
DECEMBER 10 2019......SUNRISE   715 AM PST   SUNSET   449 PM PST   
DECEMBER 11 2019......SUNRISE   716 AM PST   SUNSET   449 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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