AFOS product CLIIAD
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CDUS41 KLWX 280524
CLIIAD

CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC                  
1222 AM EST FRI DEC 28 2007

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

...THE WASHINGTON DULLES CLIMATE SUMMARY FOR DECEMBER 27 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         54    138 PM  73    1971  43     11       47       
  MINIMUM         32   1159 PM   1    1989  24      8       29       
  AVERAGE         43                        33     10       38      
                                                                     
PRECIPITATION (IN)                                                   
  YESTERDAY        T             1.04 1964   0.10  -0.10     0.00    
  MONTH TO DATE    2.47                      2.67  -0.20     1.66    
  SINCE DEC 1      2.47                      2.67  -0.20     1.66    
  SINCE JAN 1     27.50                     41.40 -13.90    45.90    
                                                                     
SNOWFALL (IN)                                                        
  YESTERDAY        0.0                       0.1   -0.1              
  MONTH TO DATE    2.5                       1.8    0.7              
  SINCE JUL 1      2.5                       2.7   -0.2              
  SNOW DEPTH       0                                                 
                                                                     
DEGREE DAYS                                                          
 HEATING                                                             
  YESTERDAY       22                        31     -9       27       
  MONTH TO DATE  721                       757    -36      608       
  SINCE DEC 1    721                       757    -36      608       
  SINCE JUL 1   1450                      1734   -284     1469       
                                                                     
 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    28   HIGHEST WIND DIRECTION     W (250)      
  HIGHEST GUST SPEED    MM   HIGHEST GUST DIRECTION    MM            
  AVERAGE WIND SPEED     3.0                                         

                                                                      
SKY COVER                                                            
  POSSIBLE SUNSHINE  MM                                              
  AVERAGE SKY COVER 0.6                                              

                                                                      
WEATHER CONDITIONS                                                  
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.                        
  FOG                                                                
  HAZE                                                               

                                                                      
RELATIVE HUMIDITY (PERCENT)                                          
 HIGHEST    96           900 PM                                     
 LOWEST     54           300 PM                                     
 AVERAGE    75                                                       

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

                                                                      
THE WASHINGTON DULLES CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR                    
 MAXIMUM TEMPERATURE (F)   43        73      1984                    
 MINIMUM TEMPERATURE (F)   24         8      1966                    

                                                                      
SUNRISE AND SUNSET                                                   
DECEMBER 28 2007......SUNRISE   728 AM EST   SUNSET   455 PM EST   
DECEMBER 29 2007......SUNRISE   728 AM EST   SUNSET   456 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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