AFOS product CLIIAD
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CDUS41 KLWX 100523
CLIIAD


CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC                  
1221 AM EST MON DEC 10 2007


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

...THE WASHINGTON DULLES CLIMATE SUMMARY FOR DECEMBER 9 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         45    214 PM  72    1978  48     -3       40       
  MINIMUM         39    921 AM  11    1989  27     12       15       
  AVERAGE         42                        38      4       28      
                                                                     
PRECIPITATION (IN)                                                   
  YESTERDAY        0.23          1.12 1973   0.10   0.13     0.00    
  MONTH TO DATE    1.00                      0.90   0.10     0.02    
  SINCE DEC 1      1.00                      0.90   0.10     0.02    
  SINCE JAN 1     26.03                     39.63 -13.60    44.26    
                                                                     
SNOWFALL (IN)                                                        
  YESTERDAY        0.0                       T      0.0              
  MONTH TO DATE    2.5                       T      2.5              
  SINCE JUL 1      2.5                       0.9    1.6              
  SNOW DEPTH       0                                                 
                                                                     
DEGREE DAYS                                                          
 HEATING                                                             
  YESTERDAY       23                        27     -4       37       
  MONTH TO DATE  276                       231     45      255       
  SINCE DEC 1    276                       231     45      255       
  SINCE JUL 1   1005                      1208   -203     1116       
                                                                     
 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    10   HIGHEST WIND DIRECTION    SE (140)      
  HIGHEST GUST SPEED    15   HIGHEST GUST DIRECTION    SE (150)      
  AVERAGE WIND SPEED     3.6                                         

                                                                      
SKY COVER                                                            
  POSSIBLE SUNSHINE  MM                                              
  AVERAGE SKY COVER 1.0                                              

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

                                                                      
RELATIVE HUMIDITY (PERCENT)                                          
 HIGHEST    93          1200 AM                                     
 LOWEST     82           200 PM                                     
 AVERAGE    88                                                       

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

                                                                      
THE WASHINGTON DULLES CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR                    
 MAXIMUM TEMPERATURE (F)   47        70      1966                    
 MINIMUM TEMPERATURE (F)   27         4      1989                    

                                                                      
SUNRISE AND SUNSET                                                   
DECEMBER 10 2007......SUNRISE   717 AM EST   SUNSET   448 PM EST   
DECEMBER 11 2007......SUNRISE   718 AM EST   SUNSET   448 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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