000 
CDUS41 KLWX 120536
CLIIAD


CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC                  
132 AM EDT THU MAY 12 2005

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

...THE WASHINGTON DULLES CLIMATE SUMMARY FOR MAY 11 2005...

CLIMATE NORMAL PERIOD 1971 TO 2000
CLIMATE RECORD PERIOD 1962 TO 2005

WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST     
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR     
                                                  NORMAL             
..................................................................
TEMPERATURE (F)                                                     
 YESTERDAY                                                           
  MAXIMUM         87    252 PM  90    1993  73     14       87       
  MINIMUM         56    600 AM  29    1966  48      8       66       
  AVERAGE         72                        61     11       77      
                                                                     
PRECIPITATION (IN)                                                   
  YESTERDAY        0.00          0.74 1981   0.14  -0.14     0.00    
  MONTH TO DATE    0.06                      1.42  -1.36     1.27    
  SINCE MAR 1      8.33                      8.19   0.14     8.36    
  SINCE JAN 1     12.88                     14.01  -1.13    11.70    
                                                                     
SNOWFALL (IN)                                                        
  YESTERDAY        0.0          MM      MM   0.0    0.0      0.0     
  MONTH TO DATE    0.0                       0.0    0.0      0.0     
  SINCE MAR 1      1.2                       3.8   -2.6       T      
  SINCE JUL 1     17.3                      21.2   -3.9     17.4     
  SNOW DEPTH       0                                                 
                                                                     
DEGREE DAYS                                                          
 HEATING                                                             
  YESTERDAY        0                         5     -5        0       
  MONTH TO DATE  100                        71     29       43       
  SINCE MAR 1   1139                      1103     36      953       
  SINCE JUL 1   4475                      4863   -388     4680       
                                                                     
 COOLING                                                             
  YESTERDAY        7                         1      6       12       
  MONTH TO DATE    7                        11     -4       37       
  SINCE MAR 1     18                        26     -8       74       
  SINCE JAN 1     18                        26     -8       74       
..................................................................

WIND (MPH)                                                           
  HIGHEST WIND SPEED    14   HIGHEST WIND DIRECTION    SW (220)      
  HIGHEST GUST SPEED    17   HIGHEST GUST DIRECTION    SW (240)      
  AVERAGE WIND SPEED     4.5                                         
                                                                     
SKY COVER                                                            
  POSSIBLE SUNSHINE  MM                                              
  AVERAGE SKY COVER 0.5                                              
                                                                     
WEATHER CONDITIONS                                                  
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.                        
  NO SIGNIFICANT WEATHER WAS OBSERVED.                               
                                                                     
RELATIVE HUMIDITY (PERCENT)                                          
 HIGHEST    86           400 AM                                     
 LOWEST     37           400 PM                                     
 AVERAGE    62                                                       
..........................................................
                                                                     
THE WASHINGTON DULLES CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR                    
 MAXIMUM TEMPERATURE (F)   73        89      1991                    
 MINIMUM TEMPERATURE (F)   49        34      1969                    
                                                                     
SUNRISE AND SUNSET                                                   
MAY 12 2005...........SUNRISE   600 AM EDT   SUNSET   813 PM EDT   
MAY 13 2005...........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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