AFOS product CLIIAD
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CDUS41 KLWX 120542
CLIIAD


CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC                  
142 AM EDT SAT MAY 12 2007


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

...THE WASHINGTON DULLES CLIMATE SUMMARY FOR MAY 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         85    447 PM  90    1993  73     12       69       
  MINIMUM         63   1132 PM  29    1966  48     15       53       
  AVERAGE         74                        61     13       61      
                                                                     
PRECIPITATION (IN)                                                   
  YESTERDAY        T             0.78 2006   0.14  -0.14     0.78    
  MONTH TO DATE    0.05                      1.42  -1.37     1.03    
  SINCE MAR 1      6.36                      8.19  -1.83     5.96    
  SINCE JAN 1     11.01                     14.01  -3.00    10.74    
                                                                     
SNOWFALL (IN)                                                        
  YESTERDAY        0.0                       0.0    0.0              
  MONTH TO DATE    0.0                       0.0    0.0              
  SINCE AUG 1     14.7                      21.2   -6.5              
  SINCE JUL 1     14.7                      21.2   -6.5              
  SNOW DEPTH       0                                                 
                                                                     
DEGREE DAYS                                                          
 HEATING                                                             
  YESTERDAY        0                         5     -5        4       
  MONTH TO DATE   50                        71    -21       50       
  SINCE MAR 1   1022                      1103    -81      871       
  SINCE JUL 1   4398                      4863   -465     4099       
                                                                     
 COOLING                                                             
  YESTERDAY        9                         1      8        0       
  MONTH TO DATE   27                        11     16        8       
  SINCE MAR 1     50                        26     24       20       
  SINCE JAN 1     50                        26     24       20       
..................................................................


 WIND (MPH)                                                           
  HIGHEST WIND SPEED    14   HIGHEST WIND DIRECTION    NW (330)      
  HIGHEST GUST SPEED    28   HIGHEST GUST DIRECTION     E (90)       
  AVERAGE WIND SPEED     4.3                                         

                                                                      
SKY COVER                                                            
  POSSIBLE SUNSHINE  MM                                              
  AVERAGE SKY COVER 0.6                                              

                                                                      
WEATHER CONDITIONS                                                  
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.                        
  RAIN                                                               
  FOG                                                                
  HAZE                                                               

                                                                      
RELATIVE HUMIDITY (PERCENT)                                          
 HIGHEST    93           300 AM                                     
 LOWEST     37           200 PM                                     
 AVERAGE    65                                                       

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

                                                                      
THE WASHINGTON DULLES CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR                    
 MAXIMUM TEMPERATURE (F)   73        89      1991                    
                                             1982                    
 MINIMUM TEMPERATURE (F)   49        34      1969                    

                                                                      
SUNRISE AND SUNSET                                                   
MAY 12 2007...........SUNRISE   600 AM EDT   SUNSET   813 PM EDT   
MAY 13 2007...........SUNRISE   559 AM EDT   SUNSET   814 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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