AFOS product CLIAPC
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CDUS46 KMTR 210845
CLIAPC


CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA                      
1245 AM PST WED DEC 21 2016


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

...THE NAPA AIRPORT  CLIMATE SUMMARY FOR DECEMBER 20 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         59    220 PM  67    1999  55      4       52       
  MINIMUM         32    719 AM  25    2008  36     -4       30       
  AVERAGE         46                        45      1       41      
                                                                     
PRECIPITATION (IN)                                                   
  YESTERDAY        0.00                                      0.78    
  MONTH TO DATE    3.54                                      1.86    
  SINCE OCT 1      8.29                                      3.27    
  SINCE JAN 1     22.96                                      7.37    
                                                                     
DEGREE DAYS                                                          
 HEATING                                                             
  YESTERDAY       19                                        24       
  MONTH TO DATE  328                                       335       
  SINCE DEC 1    328                                       335       
  SINCE JUL 1    832                                       876       
                                                                     
 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  NE (60)       
  HIGHEST WIND SPEED    13   HIGHEST WIND DIRECTION     E (110)      
  HIGHEST GUST SPEED    15   HIGHEST GUST DIRECTION    SE (120)      
  AVERAGE WIND SPEED     4.9                                         

                                                                     
SKY COVER                                                            
  POSSIBLE SUNSHINE  MM                                              
  AVERAGE SKY COVER 0.0                                              

                                                                     
WEATHER CONDITIONS                                                  
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.                        
  NO SIGNIFICANT WEATHER WAS OBSERVED.                               

                                                                     
RELATIVE HUMIDITY (PERCENT)                                          
 HIGHEST    89           500 AM                                     
 LOWEST     43           100 PM                                     
 AVERAGE    66                                                       

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

                                                                     
THE NAPA AIRPORT  CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR                    
 MAXIMUM TEMPERATURE (F)   55        71      1999                    
 MINIMUM TEMPERATURE (F)   36        21      1998                    

                                                                     
SUNRISE AND SUNSET                                                   
DECEMBER 21 2016......SUNRISE   722 AM PST   SUNSET   453 PM PST   
DECEMBER 22 2016......SUNRISE   723 AM PST   SUNSET   453 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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