AFOS product CLISFO
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CDUS46 KMTR 190827
CLISFO

CLIMATE REPORT
NATIONAL WEATHER SERVICE IN SAN FRANCISCO                            
1226 AM PST WED DEC 19 2007


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

...THE SAN FRANCISCO AIRPORT CLIMATE SUMMARY FOR DECEMBER 18 2007...

CLIMATE NORMAL PERIOD 1971 TO 2000
CLIMATE RECORD PERIOD 1927 TO 2007


 WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST     
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR     
                                                  NORMAL             
..................................................................
TEMPERATURE (F)                                                     
 YESTERDAY                                                           
  MAXIMUM         57   1243 PM  65    1958  56      1       55       
  MINIMUM         48   1159 PM  30    1965  43      5       35       
  AVERAGE         53                        49      4       45      
                                                                     
PRECIPITATION (IN)                                                   
  YESTERDAY        0.78          1.77 2005   0.09   0.69     0.00    
  MONTH TO DATE    1.61                      1.56   0.05     2.40    
  SINCE JUL 1      4.32                      5.39  -1.07     4.37    
  SINCE JAN 1     10.61                     18.78  -8.17    19.63    
                                                                     
SNOWFALL (IN)                                                        
  YESTERDAY       MM                                                 
  MONTH TO DATE    0.0                                               
  SINCE DEC 1      0.0                                               
  SINCE JUL 1      0.0                                               
  SNOW DEPTH       0                                                 
                                                                     
DEGREE DAYS                                                          
 HEATING                                                             
  YESTERDAY       12                        16     -4       20       
  MONTH TO DATE  253                       268    -15      231       
  SINCE DEC 1    253                       268    -15      231       
  SINCE JUL 1    813                       892    -79      842       
                                                                     
 COOLING                                                             
  YESTERDAY        0                         0      0        0       
  MONTH TO DATE    0                         0      0        0       
  SINCE DEC 1      0                         0      0        0       
  SINCE JAN 1    126                       142    -16      153       
..................................................................


 WIND (MPH)                                                           
  HIGHEST WIND SPEED    24   HIGHEST WIND DIRECTION     S (160)      
  HIGHEST GUST SPEED    28   HIGHEST GUST DIRECTION    SW (210)      
  AVERAGE WIND SPEED    11.3                                         

                                                                      
SKY COVER                                                            
  POSSIBLE SUNSHINE  MM                                              
  AVERAGE SKY COVER 0.8                                              

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

                                                                      
RELATIVE HUMIDITY (PERCENT)                                          
 HIGHEST    93           300 AM                                     
 LOWEST     77          1200 AM                                     
 AVERAGE    85                                                       

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

                                                                      
THE SAN FRANCISCO AIRPORT CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR                    
 MAXIMUM TEMPERATURE (F)   56        68      1999                    
 MINIMUM TEMPERATURE (F)   43        32      1965                    

                                                                      
SUNRISE AND SUNSET                                                   
DECEMBER 19 2007......SUNRISE   720 AM PST   SUNSET   454 PM PST   
DECEMBER 20 2007......SUNRISE   720 AM PST   SUNSET   454 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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