AFOS product CLIAPC
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CDUS46 KMTR 090026
CLIAPC


CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA                      
426 PM PST SUN DEC 8 2019


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

...THE NAPA AIRPORT  CLIMATE SUMMARY FOR DECEMBER 8 2019...
VALID TODAY AS OF 0400 PM LOCAL TIME.

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)                                                     
 TODAY                                                               
  MAXIMUM         62    339 PM  65    2014  57      5       62       
  MINIMUM         50    650 AM  19    2009  36     14       36       
  AVERAGE         56                        46     10       49      
                                                                     
PRECIPITATION (IN)                                                   
  TODAY            0.02                                      0.00    
  MONTH TO DATE    2.74                                      0.63    
  SINCE OCT 1      3.55                                      1.89    
  SINCE JAN 1     26.21                                     14.66    
                                                                     
DEGREE DAYS                                                          
 HEATING                                                             
  TODAY            9                                        16       
  MONTH TO DATE   78                                       128       
  SINCE DEC 1     78                                       128       
  SINCE JUL 1    678                                       695       
                                                                     
 COOLING                                                             
  TODAY            0                                         0       
  MONTH TO DATE    0                                         0       
  SINCE DEC 1      0                                         0       
  SINCE JAN 1    346                                       182       
..................................................................


WIND (MPH)                                                           
  RESULTANT WIND SPEED   4   RESULTANT WIND DIRECTION  SW (210)      
  HIGHEST WIND SPEED    10   HIGHEST WIND DIRECTION     S (200)      
  HIGHEST GUST SPEED    17   HIGHEST GUST DIRECTION     N (20)       
  AVERAGE WIND SPEED     4.5                                         

                                                                     
SKY COVER                                                            
  POSSIBLE SUNSHINE  MM                                              
  AVERAGE SKY COVER 0.7                                              

                                                                     
WEATHER CONDITIONS                                                  
 THE FOLLOWING WEATHER WAS RECORDED TODAY.                            
  LIGHT RAIN                                                         
  FOG                                                                

                                                                     
RELATIVE HUMIDITY (PERCENT)                                          
 HIGHEST    96           700 AM                                     
 LOWEST     72           100 PM                                     
 AVERAGE    84                                                       

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

                                                                     
THE NAPA AIRPORT  CLIMATE NORMALS FOR TOMORROW
                         NORMAL    RECORD    YEAR                    
 MAXIMUM TEMPERATURE (F)   56        70      2012                    
 MINIMUM TEMPERATURE (F)   36        19      2013                    

                                                                     
SUNRISE AND SUNSET                                                   
DECEMBER  8 2019......SUNRISE   713 AM PST   SUNSET   449 PM PST   
DECEMBER  9 2019......SUNRISE   714 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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