AFOS product CLIIAD
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CDUS41 KLWX 120534
CLIIAD


CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC                  
1233 AM EST WED DEC 12 2007


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

...THE WASHINGTON DULLES CLIMATE SUMMARY FOR DECEMBER 11 2007...

CLIMATE NORMAL PERIOD 1971 TO 2000
CLIMATE RECORD PERIOD 1962 TO 2007


 WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST     
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR     
                                                  NORMAL             
..................................................................
TEMPERATURE (F)                                                     
 YESTERDAY                                                           
  MAXIMUM         51   1005 PM  71    1979  47      4       62       
  MINIMUM         43    544 AM   3    1968  27     16       29       
  AVERAGE         47                        37     10       46      
                                                                     
PRECIPITATION (IN)                                                   
  YESTERDAY        0.01          1.09 2002   0.10  -0.09     0.00    
  MONTH TO DATE    1.04                      1.10  -0.06     0.02    
  SINCE DEC 1      1.04                      1.10  -0.06     0.02    
  SINCE JAN 1     26.07                     39.83 -13.76    44.26    
                                                                     
SNOWFALL (IN)                                                        
  YESTERDAY        0.0                       0.1   -0.1              
  MONTH TO DATE    2.5                       0.2    2.3              
  SINCE JUL 1      2.5                       1.1    1.4              
  SNOW DEPTH       0                                                 
                                                                     
DEGREE DAYS                                                          
 HEATING                                                             
  YESTERDAY       18                        27     -9       19       
  MONTH TO DATE  314                       285     29      298       
  SINCE DEC 1    314                       285     29      298       
  SINCE JUL 1   1043                      1262   -219     1159       
                                                                     
 COOLING                                                             
  YESTERDAY        0                         0      0        0       
  MONTH TO DATE    0                         0      0        0       
  SINCE DEC 1      0                         0      0        0       
  SINCE JAN 1   1593                      1075    518     1256       
..................................................................


 WIND (MPH)                                                           
  HIGHEST WIND SPEED    16   HIGHEST WIND DIRECTION     S (180)      
  HIGHEST GUST SPEED    20   HIGHEST GUST DIRECTION     S (190)      
  AVERAGE WIND SPEED     5.6                                         

                                                                      
SKY COVER                                                            
  POSSIBLE SUNSHINE  MM                                              
  AVERAGE SKY COVER 1.0                                              

                                                                      
WEATHER CONDITIONS                                                  
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.                        
  LIGHT RAIN                                                         
  FOG                                                                
  FOG W/VISIBILITY <= 1/4 MILE                                       
  HAZE                                                               

                                                                      
RELATIVE HUMIDITY (PERCENT)                                          
 HIGHEST    93           200 PM                                     
 LOWEST     82           400 AM                                     
 AVERAGE    88                                                       

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

                                                                      
THE WASHINGTON DULLES CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR                    
 MAXIMUM TEMPERATURE (F)   47        72      1979                    
 MINIMUM TEMPERATURE (F)   27         9      1988                    

                                                                      
SUNRISE AND SUNSET                                                   
DECEMBER 12 2007......SUNRISE   719 AM EST   SUNSET   448 PM EST   
DECEMBER 13 2007......SUNRISE   720 AM EST   SUNSET   448 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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