AFOS product CLIIAD
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CDUS41 KLWX 110520
CLIIAD


CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC                  
1219 AM EST TUE DEC 11 2007


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

...THE WASHINGTON DULLES CLIMATE SUMMARY FOR DECEMBER 10 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         48    340 PM  70    1966  47      1       60       
  MINIMUM         42    832 AM   4    1989  27     15       21       
  AVERAGE         45                        37      8       41      
                                                                     
PRECIPITATION (IN)                                                   
  YESTERDAY        0.03          2.26 1992   0.10  -0.07     0.00    
  MONTH TO DATE    1.03                      1.00   0.03     0.02    
  SINCE DEC 1      1.03                      1.00   0.03     0.02    
  SINCE JAN 1     26.06                     39.73 -13.67    44.26    
                                                                     
SNOWFALL (IN)                                                        
  YESTERDAY        0.0                       0.1   -0.1              
  MONTH TO DATE    2.5                       0.1    2.4              
  SINCE JUL 1      2.5                       1.0    1.5              
  SNOW DEPTH       0                                                 
                                                                     
DEGREE DAYS                                                          
 HEATING                                                             
  YESTERDAY       20                        27     -7       24       
  MONTH TO DATE  296                       258     38      279       
  SINCE DEC 1    296                       258     38      279       
  SINCE JUL 1   1025                      1235   -210     1140       
                                                                     
 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    12   HIGHEST WIND DIRECTION     N (360)      
  HIGHEST GUST SPEED    22   HIGHEST GUST DIRECTION    SW (220)      
  AVERAGE WIND SPEED     3.1                                         

                                                                      
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    96          1200 AM                                     
 LOWEST     82          1000 AM                                     
 AVERAGE    89                                                       

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

                                                                      
THE WASHINGTON DULLES CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR                    
 MAXIMUM TEMPERATURE (F)   47        71      1979                    
 MINIMUM TEMPERATURE (F)   27         3      1968                    

                                                                      
SUNRISE AND SUNSET                                                   
DECEMBER 11 2007......SUNRISE   718 AM EST   SUNSET   448 PM EST   
DECEMBER 12 2007......SUNRISE   719 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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