AFOS product CLIIAD
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CDUS41 KLWX 200546
CLIIAD


CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC                  
1245 AM EST WED DEC 20 2006

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

...THE WASHINGTON DULLES CLIMATE SUMMARY FOR DECEMBER 19 2006...

CLIMATE NORMAL PERIOD 1971 TO 2000
CLIMATE RECORD PERIOD 1962 TO 2006

WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST     
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR     
                                                  NORMAL             
..................................................................
TEMPERATURE (F)                                                     
 YESTERDAY                                                           
  MAXIMUM         51    309 PM  63    1967  45      6       39       
  MINIMUM         33   1157 PM  -2    1989  25      8       24       
  AVERAGE         42                        35      7       32      
                                                                     
PRECIPITATION (IN)                                                   
  YESTERDAY        0.00          0.86 1995   0.10  -0.10     0.00    
  MONTH TO DATE    0.16                      1.90  -1.74     2.14    
  SINCE DEC 1      0.16                      1.90  -1.74     2.14    
  SINCE JAN 1     44.40                     40.63   3.77    43.77    
                                                                     
SNOWFALL (IN)                                                        
  YESTERDAY        0.0                                               
  SNOW DEPTH       0                                                 
                                                                     
DEGREE DAYS                                                          
 HEATING                                                             
  YESTERDAY       23                        29     -6       33       
  MONTH TO DATE  430                       513    -83      635       
  SINCE DEC 1    430                       513    -83      635       
  SINCE JUL 1   1291                      1490   -199     1374       
                                                                     
 COOLING                                                             
  YESTERDAY        0                         0      0        0       
  MONTH TO DATE    0                         0      0        0       
  SINCE DEC 1      0                         0      0        0       
  SINCE JAN 1   1256                      1075    181     1373       
..................................................................

WIND (MPH)                                                           
  HIGHEST WIND SPEED    18   HIGHEST WIND DIRECTION     N (340)      
  HIGHEST GUST SPEED    23   HIGHEST GUST DIRECTION     N (340)      
  AVERAGE WIND SPEED     7.5                                         
                                                                     
SKY COVER                                                            
  POSSIBLE SUNSHINE  MM                                              
  AVERAGE SKY COVER 0.5                                              
                                                                     
WEATHER CONDITIONS                                                  
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.                        
  NO SIGNIFICANT WEATHER WAS OBSERVED.                               
                                                                     
RELATIVE HUMIDITY (PERCENT)                                          
 HIGHEST    59          1000 PM                                     
 LOWEST     32           300 PM                                     
 AVERAGE    46                                                       
..........................................................
                                                                     
THE WASHINGTON DULLES CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR                    
 MAXIMUM TEMPERATURE (F)   45        64      1988                    
 MINIMUM TEMPERATURE (F)   25         8      1991                    
                                                                     
SUNRISE AND SUNSET                                                   
DECEMBER 20 2006......SUNRISE   724 AM EST   SUNSET   450 PM EST   
DECEMBER 21 2006......SUNRISE   725 AM EST   SUNSET   451 PM EST   
                                                                    
-  INDICATES NEGATIVE NUMBERS.                                      
R  INDICATES RECORD WAS SET OR TIED.                                
MM INDICATES DATA IS MISSING.                                       
T  INDICATES TRACE AMOUNT.                                          


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