AFOS product CLIIAD
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CDUS41 KLWX 080519
CLIIAD


CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC                  
1218 AM EST SAT DEC 8 2007


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

...THE WASHINGTON DULLES CLIMATE SUMMARY FOR DECEMBER 7 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         34   1140 PM  77    1998  48    -14       54       
  MINIMUM         15   1220 AM   1    2002  28    -13       23       
  AVERAGE         25                        38    -13       39      
                                                                     
PRECIPITATION (IN)                                                   
  YESTERDAY        0.04          1.13 1976   0.10  -0.06      T      
  MONTH TO DATE    0.58                      0.70  -0.12     0.02    
  SINCE DEC 1      0.58                      0.70  -0.12     0.02    
  SINCE JAN 1     25.61                     39.43 -13.82    44.26    
                                                                     
SNOWFALL (IN)                                                        
  YESTERDAY        T                         T      0.0              
  MONTH TO DATE    2.5                       T      2.5              
  SINCE JUL 1      2.5                       0.9    1.6              
  SNOW DEPTH       2                                                 
                                                                     
DEGREE DAYS                                                          
 HEATING                                                             
  YESTERDAY       40                        26     14       26       
  MONTH TO DATE  230                       177     53      180       
  SINCE DEC 1    230                       177     53      180       
  SINCE JUL 1    959                      1154   -195     1041       
                                                                     
 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    14   HIGHEST WIND DIRECTION     S (190)      
  HIGHEST GUST SPEED    17   HIGHEST GUST DIRECTION     S (200)      
  AVERAGE WIND SPEED     3.4                                         

                                                                      
SKY COVER                                                            
  POSSIBLE SUNSHINE  MM                                              
  AVERAGE SKY COVER 0.8                                              

                                                                      
WEATHER CONDITIONS                                                  
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.                        
  LIGHT RAIN                                                         
  LT FREEZING RAIN                                                   
  SLEET                                                              
  FOG                                                                

                                                                      
RELATIVE HUMIDITY (PERCENT)                                          
 HIGHEST    89          1100 PM                                     
 LOWEST     68           400 AM                                     
 AVERAGE    79                                                       

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

                                                                      
THE WASHINGTON DULLES CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR                    
 MAXIMUM TEMPERATURE (F)   48        76      1980                    
 MINIMUM TEMPERATURE (F)   28        13      2002                    

                                                                      
SUNRISE AND SUNSET                                                   
DECEMBER  8 2007......SUNRISE   716 AM EST   SUNSET   447 PM EST   
DECEMBER  9 2007......SUNRISE   717 AM EST   SUNSET   447 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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