AFOS product CLIIAD
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CDUS41 KLWX 190527
CLIIAD


CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC                  
1226 AM EST WED DEC 19 2007


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

...THE WASHINGTON DULLES CLIMATE SUMMARY FOR DECEMBER 18 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         41    348 PM  76    2006  45     -4       76       
  MINIMUM         20    736 AM   3    1989  25     -5       46       
  AVERAGE         31                        35     -4       61      
                                                                     
PRECIPITATION (IN)                                                   
  YESTERDAY        0.00          2.92 1977   0.10  -0.10     0.00    
  MONTH TO DATE    2.05                      1.80   0.25     0.16    
  SINCE DEC 1      2.05                      1.80   0.25     0.16    
  SINCE JAN 1     27.08                     40.53 -13.45    44.40    
                                                                     
SNOWFALL (IN)                                                        
  YESTERDAY        0.0                       0.1   -0.1              
  MONTH TO DATE    2.5                       0.9    1.6              
  SINCE JUL 1      2.5                       1.8    0.7              
  SNOW DEPTH       0                                                 
                                                                     
DEGREE DAYS                                                          
 HEATING                                                             
  YESTERDAY       34                        29      5        4       
  MONTH TO DATE  495                       484     11      407       
  SINCE DEC 1    495                       484     11      407       
  SINCE JUL 1   1224                      1461   -237     1268       
                                                                     
 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    NW (320)      
  HIGHEST GUST SPEED    16   HIGHEST GUST DIRECTION    NW (320)      
  AVERAGE WIND SPEED     5.1                                         

                                                                      
SKY COVER                                                            
  POSSIBLE SUNSHINE  MM                                              
  AVERAGE SKY COVER 0.4                                              

                                                                      
WEATHER CONDITIONS                                                  
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.                        
  HAZE                                                               

                                                                      
RELATIVE HUMIDITY (PERCENT)                                          
 HIGHEST    77           700 AM                                     
 LOWEST     37           200 PM                                     
 AVERAGE    57                                                       

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

                                                                      
THE WASHINGTON DULLES CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR                    
 MAXIMUM TEMPERATURE (F)   45        63      1967                    
 MINIMUM TEMPERATURE (F)   25        -2      1989                    

                                                                      
SUNRISE AND SUNSET                                                   
DECEMBER 19 2007......SUNRISE   724 AM EST   SUNSET   450 PM EST   
DECEMBER 20 2007......SUNRISE   724 AM EST   SUNSET   450 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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