AFOS product CLIAPC
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CDUS46 KMTR 120826
CLIAPC


CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA                      
1226 AM PST THU DEC 12 2019


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

...THE NAPA AIRPORT  CLIMATE SUMMARY FOR DECEMBER 11 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         54   1159 PM  66    2017  56     -2       57       
  MINIMUM         51    934 AM  25    2013  36     15       36       
  AVERAGE         53                        46      7       47      
                                                                     
PRECIPITATION (IN)                                                   
  YESTERDAY        0.05                                      0.00    
  MONTH TO DATE    2.95                                      0.64    
  SINCE OCT 1      3.76                                      1.90    
  SINCE JAN 1     26.42                                     14.67    
                                                                     
DEGREE DAYS                                                          
 HEATING                                                             
  YESTERDAY       12                                        18       
  MONTH TO DATE  127                                       182       
  SINCE DEC 1    127                                       182       
  SINCE JUL 1    727                                       749       
                                                                     
 COOLING                                                             
  YESTERDAY        0                                         0       
  MONTH TO DATE    0                                         0       
  SINCE DEC 1      0                                         0       
  SINCE JAN 1    346                                       182       
..................................................................


WIND (MPH)                                                           
  RESULTANT WIND SPEED   9   RESULTANT WIND DIRECTION   E (90)       
  HIGHEST WIND SPEED    18   HIGHEST WIND DIRECTION     E (90)       
  HIGHEST GUST SPEED    23   HIGHEST GUST DIRECTION     E (80)       
  AVERAGE WIND SPEED     9.3                                         

                                                                     
SKY COVER                                                            
  POSSIBLE SUNSHINE  MM                                              
  AVERAGE SKY COVER 1.0                                              

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

                                                                     
RELATIVE HUMIDITY (PERCENT)                                          
 HIGHEST   100          1100 AM                                     
 LOWEST     89           200 AM                                     
 AVERAGE    95                                                       

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

                                                                     
THE NAPA AIRPORT  CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR                    
 MAXIMUM TEMPERATURE (F)   56        64      2018                    
 MINIMUM TEMPERATURE (F)   36        26      2013                    

                                                                     
SUNRISE AND SUNSET                                                   
DECEMBER 12 2019......SUNRISE   716 AM PST   SUNSET   449 PM PST   
DECEMBER 13 2019......SUNRISE   717 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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