AFOS product CLISFO
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CDUS46 KMTR 220828
CLISFO

CLIMATE REPORT
NATIONAL WEATHER SERVICE IN SAN FRANCISCO                            
1227 AM PST SAT DEC 22 2007


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

...THE SAN FRANCISCO AIRPORT CLIMATE SUMMARY FOR DECEMBER 21 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    337 PM  68    1999  55      2       55       
  MINIMUM         38    514 AM  28    1990  42     -4       44       
  AVERAGE         48                        49     -1       50      
                                                                     
PRECIPITATION (IN)                                                   
  YESTERDAY        0.00          1.73 1945   0.09  -0.09     0.44    
  MONTH TO DATE    2.29                      1.83   0.46     2.84    
  SINCE JUL 1      5.00                      5.66  -0.66     4.81    
  SINCE JAN 1     11.29                     19.05  -7.76    20.07    
                                                                     
SNOWFALL (IN)                                                        
  YESTERDAY        0.0                                               
  MONTH TO DATE    0.0                                               
  SINCE DEC 1      0.0                                               
  SINCE JUL 1      0.0                                               
  SNOW DEPTH       0                                                 
                                                                     
DEGREE DAYS                                                          
 HEATING                                                             
  YESTERDAY       17                        16      1       15       
  MONTH TO DATE  298                       316    -18      290       
  SINCE DEC 1    298                       316    -18      290       
  SINCE JUL 1    858                       940    -82      901       
                                                                     
 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    17   HIGHEST WIND DIRECTION     N (340)      
  HIGHEST GUST SPEED    24   HIGHEST GUST DIRECTION     S (200)      
  AVERAGE WIND SPEED     4.6                                         

                                                                      
SKY COVER                                                            
  POSSIBLE SUNSHINE  MM                                              
  AVERAGE SKY COVER 0.4                                              

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

                                                                      
RELATIVE HUMIDITY (PERCENT)                                          
 HIGHEST    79           400 AM                                     
 LOWEST     42          1100 AM                                     
 AVERAGE    61                                                       

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

                                                                      
THE SAN FRANCISCO AIRPORT CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR                    
 MAXIMUM TEMPERATURE (F)   55        68      1999                    
 MINIMUM TEMPERATURE (F)   42        27      1990                    

                                                                      
SUNRISE AND SUNSET                                                   
DECEMBER 22 2007......SUNRISE   721 AM PST   SUNSET   455 PM PST   
DECEMBER 23 2007......SUNRISE   722 AM PST   SUNSET   456 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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