AFOS product CLIIAD
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CDUS41 KLWX 210535
CLIIAD


CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC                  
1233 AM EST SUN DEC 21 2003

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

...THE WASHINGTON DULLES CLIMATE SUMMARY FOR DECEMBER 20 2003...

CLIMATE NORMAL PERIOD 1971 TO 2000
CLIMATE RECORD PERIOD 1962 TO 2003

WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST     
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR     
                                                  NORMAL             
..................................................................
TEMPERATURE (F)                                                     
 YESTERDAY                                                           
  MAXIMUM         38    229 PM  64    1988  45     -7       54       
  MINIMUM         21    628 AM   8    1991  25     -4       32       
  AVERAGE         30                        35     -5       43      
                                                                     
PRECIPITATION (IN)                                                   
  YESTERDAY        0.00          0.66 1973   0.10  -0.10     0.43    
  MONTH TO DATE    4.17                      2.00   2.17     2.74    
  SINCE DEC 1      4.17                      2.00   2.17     2.74    
  SINCE JAN 1     65.31                     40.73  24.58    37.31    
                                                                     
SNOWFALL (IN)                                                        
  YESTERDAY        0.0           4.3  1966   0.1   -0.1      0.0     
  MONTH TO DATE   11.4                       1.1   10.3      6.2     
  SINCE DEC 1     11.4                       1.1   10.3      6.2     
  SINCE JUL 1     11.4                       2.0    9.4      6.2     
  SNOW DEPTH       0                                                 
                                                                     
DEGREE DAYS                                                          
 HEATING                                                             
  YESTERDAY       35                        30      5       22       
  MONTH TO DATE  618                       543     75      667       
  SINCE DEC 1    618                       543     75      667       
  SINCE JUL 1   1444                      1520    -76     1649       
                                                                     
 COOLING                                                             
  YESTERDAY        0                         0      0        0       
  MONTH TO DATE    0                         0      0        0       
  SINCE DEC 1      0                         0      0        0       
  SINCE JAN 1    993                      1075    -82     1345       
..................................................................

WIND (MPH)                                                           
  HIGHEST WIND SPEED    20   HIGHEST WIND DIRECTION    NW (300)      
  HIGHEST GUST SPEED    26   HIGHEST GUST DIRECTION    NW (320)      
  AVERAGE WIND SPEED     8.6                                         
                                                                     
SKY COVER                                                            
  POSSIBLE SUNSHINE  MM                                              
  AVERAGE SKY COVER 0.4                                              
                                                                     
WEATHER CONDITIONS                                                  
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.                        
  NO SIGNIFICANT WEATHER WAS OBSERVED.                               
                                                                     
RELATIVE HUMIDITY (PERCENT)                                          
 HIGHEST    92          M600 AM                                     
 LOWEST     40          M400 PM                                     
 AVERAGE    66                                                       
..........................................................
                                                                     
THE WASHINGTON DULLES CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR                    
 MAXIMUM TEMPERATURE (F)   44        60      1971                    
 MINIMUM TEMPERATURE (F)   25         4      1989                    
                                                                     
SUNRISE AND SUNSET                                                   
DECEMBER 21 2003......SUNRISE   725 AM EST   SUNSET   451 PM EST   
DECEMBER 22 2003......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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