AFOS product CLIIAD
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CDUS41 KLWX 210524
CLIIAD


CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC                  
123 AM EDT SAT JUL 21 2007


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

...THE WASHINGTON DULLES CLIMATE SUMMARY FOR JULY 20 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         85    232 PM 101    1980  88     -3       89       
  MINIMUM         63   1145 PM  55    1974  64     -1       71       
  AVERAGE         74                        76     -2       80      
                                                                     
PRECIPITATION (IN)                                                   
  YESTERDAY        0.00          2.28 1970   0.11  -0.11     0.00    
  MONTH TO DATE    0.84                      2.34  -1.50     2.19    
  SINCE JUN 1      3.76                      6.41  -2.65    13.98    
  SINCE JAN 1     15.06                     23.22  -8.16    25.49    
                                                                     
SNOWFALL (IN)                                                        
  YESTERDAY        0.0                       0.0    0.0              
  MONTH TO DATE    0.0                       0.0    0.0              
  SINCE JUL 1      0.0                       0.0    0.0              
  SNOW DEPTH       0                                                 
                                                                     
DEGREE DAYS                                                          
 HEATING                                                             
  YESTERDAY        0                         0      0        0       
  MONTH TO DATE    0                         1     -1        0       
  SINCE JUN 1      3                        22    -19        4       
  SINCE JUL 1      0                         1     -1        0       
                                                                     
 COOLING                                                             
  YESTERDAY        9                        12     -3       15       
  MONTH TO DATE  244                       215     29      261       
  SINCE JUN 1    535                       418    117      500       
  SINCE JAN 1    686                       493    193      582       
..................................................................


 WIND (MPH)                                                           
  HIGHEST WIND SPEED    21   HIGHEST WIND DIRECTION    NW (330)      
  HIGHEST GUST SPEED    37   HIGHEST GUST DIRECTION     N (360)      
  AVERAGE WIND SPEED    10.0                                         

                                                                      
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    79           200 AM                                     
 LOWEST     29           300 PM                                     
 AVERAGE    54                                                       

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

                                                                      
THE WASHINGTON DULLES CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR                    
 MAXIMUM TEMPERATURE (F)   88       101      1991                    
 MINIMUM TEMPERATURE (F)   65        48      1966                    

                                                                      
SUNRISE AND SUNSET                                                   
JULY 21 2007..........SUNRISE   601 AM EDT   SUNSET   831 PM EDT   
JULY 22 2007..........SUNRISE   602 AM EDT   SUNSET   830 PM EDT   

                                                                     
-  INDICATES NEGATIVE NUMBERS.                                      
R  INDICATES RECORD WAS SET OR TIED.                                
MM INDICATES DATA IS MISSING.                                       
T  INDICATES TRACE AMOUNT.                                          

 


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