AFOS product CLIIAD
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CDUS41 KLWX 180542
CLIIAD


CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC                  
1240 AM EST MON DEC 18 2006

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

...THE WASHINGTON DULLES CLIMATE SUMMARY FOR DECEMBER 17 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         66    341 PM  70    1984  45     21       44       
  MINIMUM         29    726 AM   3    1989  26      3       27       
  AVERAGE         48                        35     13       36      
                                                                     
PRECIPITATION (IN)                                                   
  YESTERDAY        0.00          0.75 2000   0.10  -0.10     0.00    
  MONTH TO DATE    0.16                      1.70  -1.54     2.14    
  SINCE DEC 1      0.16                      1.70  -1.54     2.14    
  SINCE JAN 1     44.40                     40.43   3.97    43.77    
                                                                     
SNOWFALL (IN)                                                        
  YESTERDAY        0.0                                               
  SNOW DEPTH       0                                                 
                                                                     
DEGREE DAYS                                                          
 HEATING                                                             
  YESTERDAY       17                        29    -12       29       
  MONTH TO DATE  403                       455    -52      573       
  SINCE DEC 1    403                       455    -52      573       
  SINCE JUL 1   1264                      1432   -168     1312       
                                                                     
 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    12   HIGHEST WIND DIRECTION     S (190)      
  HIGHEST GUST SPEED    15   HIGHEST GUST DIRECTION     S (190)      
  AVERAGE WIND SPEED     4.0                                         
                                                                     
SKY COVER                                                            
  POSSIBLE SUNSHINE  MM                                              
  AVERAGE SKY COVER 0.7                                              
                                                                     
WEATHER CONDITIONS                                                  
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.                        
  NO SIGNIFICANT WEATHER WAS OBSERVED.                               
                                                                     
RELATIVE HUMIDITY (PERCENT)                                          
 HIGHEST    92           200 AM                                     
 LOWEST     37           200 PM                                     
 AVERAGE    65                                                       
..........................................................
                                                                     
THE WASHINGTON DULLES CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR                    
 MAXIMUM TEMPERATURE (F)   45        69      1984                    
 MINIMUM TEMPERATURE (F)   25         3      1989                    
                                                                     
SUNRISE AND SUNSET                                                   
DECEMBER 18 2006......SUNRISE   723 AM EST   SUNSET   450 PM EST   
DECEMBER 19 2006......SUNRISE   724 AM EST   SUNSET   450 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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