AFOS product CLIAPC
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CDUS46 KMTR 150826
CLIAPC


CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA                      
1226 AM PST SAT DEC 15 2018


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

...THE NAPA AIRPORT  CLIMATE SUMMARY FOR DECEMBER 14 2018...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1998 TO 2018


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST     
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR     
                                                  NORMAL             
..................................................................
TEMPERATURE (F)                                                     
 YESTERDAY                                                           
  MAXIMUM         62   1239 PM  63    2017  56      6       63       
  MINIMUM         49    716 AM  24    2008  36     13       27       
  AVERAGE         56                        46     10       45      
                                                                     
PRECIPITATION (IN)                                                   
  YESTERDAY        0.14                                      0.00    
  MONTH TO DATE    0.78                                      0.01    
  SINCE OCT 1      2.04                                      2.98    
  SINCE JAN 1     14.81                                     31.16    
                                                                     
DEGREE DAYS                                                          
 HEATING                                                             
  YESTERDAY        9                                        20       
  MONTH TO DATE  222                                       230       
  SINCE DEC 1    222                                       230       
  SINCE JUL 1    789                                       758       
                                                                     
 COOLING                                                             
  YESTERDAY        0                                         0       
  MONTH TO DATE    0                                         0       
  SINCE DEC 1      0                                         0       
  SINCE JAN 1    182                                       530       
..................................................................


WIND (MPH)                                                           
  RESULTANT WIND SPEED   4   RESULTANT WIND DIRECTION  SE (130)      
  HIGHEST WIND SPEED    26   HIGHEST WIND DIRECTION     S (200)      
  HIGHEST GUST SPEED    32   HIGHEST GUST DIRECTION     S (200)      
  AVERAGE WIND SPEED     9.2                                         

                                                                     
SKY COVER                                                            
  POSSIBLE SUNSHINE  MM                                              
  AVERAGE SKY COVER 0.5                                              

                                                                     
WEATHER CONDITIONS                                                  
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.                        
  LIGHT RAIN                                                         
  FOG                                                                
  HAZE                                                               

                                                                     
RELATIVE HUMIDITY (PERCENT)                                          
 HIGHEST   100           900 PM                                     
 LOWEST     66           200 AM                                     
 AVERAGE    83                                                       

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

                                                                     
THE NAPA AIRPORT  CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR                    
 MAXIMUM TEMPERATURE (F)   55        64      1998                    
 MINIMUM TEMPERATURE (F)   36        26      2005                    

                                                                     
SUNRISE AND SUNSET                                                   
DECEMBER 15 2018......SUNRISE   719 AM PST   SUNSET   450 PM PST   
DECEMBER 16 2018......SUNRISE   719 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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