AFOS product CLIIAD
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CDUS41 KLWX 200526
CLIIAD


CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC                  
1225 AM EST THU DEC 20 2007


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

...THE WASHINGTON DULLES CLIMATE SUMMARY FOR DECEMBER 19 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    352 PM  63    1967  45     -4       51       
  MINIMUM         29   1159 PM  -2    1989  25      4       33       
  AVERAGE         35                        35      0       42      
                                                                     
PRECIPITATION (IN)                                                   
  YESTERDAY        0.00          0.86 1995   0.10  -0.10     0.00    
  MONTH TO DATE    2.05                      1.90   0.15     0.16    
  SINCE DEC 1      2.05                      1.90   0.15     0.16    
  SINCE JAN 1     27.08                     40.63 -13.55    44.40    
                                                                     
SNOWFALL (IN)                                                        
  YESTERDAY        0.0                       0.1   -0.1              
  MONTH TO DATE    2.5                       1.0    1.5              
  SINCE JUL 1      2.5                       1.9    0.6              
  SNOW DEPTH       0                                                 
                                                                     
DEGREE DAYS                                                          
 HEATING                                                             
  YESTERDAY       30                        29      1       23       
  MONTH TO DATE  525                       513     12      430       
  SINCE DEC 1    525                       513     12      430       
  SINCE JUL 1   1254                      1490   -236     1291       
                                                                     
 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     S (180)      
  HIGHEST GUST SPEED    22   HIGHEST GUST DIRECTION    SE (120)      
  AVERAGE WIND SPEED     4.1                                         

                                                                      
SKY COVER                                                            
  POSSIBLE SUNSHINE  MM                                              
  AVERAGE SKY COVER 0.8                                              

                                                                      
WEATHER CONDITIONS                                                  
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.                        
  HAZE                                                               

                                                                      
RELATIVE HUMIDITY (PERCENT)                                          
 HIGHEST    78          1100 PM                                     
 LOWEST     40           400 AM                                     
 AVERAGE    59                                                       

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

                                                                      
THE WASHINGTON DULLES CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR                    
 MAXIMUM TEMPERATURE (F)   45        64      1988                    
 MINIMUM TEMPERATURE (F)   25         8      1991                    

                                                                      
SUNRISE AND SUNSET                                                   
DECEMBER 20 2007......SUNRISE   724 AM EST   SUNSET   450 PM EST   
DECEMBER 21 2007......SUNRISE   725 AM EST   SUNSET   451 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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