AFOS product CLIIAD
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CDUS41 KLWX 170529
CLIIAD


CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC                  
1228 AM EST FRI JAN 17 2020


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

...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 16 2020...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1960 TO 2020


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST     
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR     
                                                  NORMAL             
..................................................................
TEMPERATURE (F)                                                     
 YESTERDAY                                                           
  MAXIMUM         54    544 AM  65    1974  42     12       41       
  MINIMUM         35   1159 PM  -4    1964  24     11       12       
  AVERAGE         45                        33     12       27      
                                                                     
PRECIPITATION (IN)                                                   
  YESTERDAY        T             0.64 1991   0.08  -0.08     0.00    
  MONTH TO DATE    1.45                      1.33   0.12     1.13    
  SINCE DEC 1      4.42                      4.29   0.13     6.89    
  SINCE JAN 1      1.45                      1.33   0.12     1.13    
                                                                     
SNOWFALL (IN)                                                        
  YESTERDAY        T             2.3  1965   0.2   -0.2              
  MONTH TO DATE    2.0                       3.2   -1.2              
  SINCE JUL 1      2.6                       7.2   -4.6              
  SNOW DEPTH       0                                                 
                                                                     
DEGREE DAYS                                                          
 HEATING                                                             
  YESTERDAY       20                        32    -12       38       
  MONTH TO DATE  349                       512   -163      464       
  SINCE DEC 1   1149                      1394   -245     1268       
  SINCE JUL 1   2012                      2310   -298     2226       
                                                                     
 COOLING                                                             
  YESTERDAY        0                         0      0        0       
  MONTH TO DATE    0                         0      0        0       
  SINCE DEC 1      0                         0      0        0       
  SINCE JAN 1      0                         0      0        0       
..................................................................


WIND (MPH)                                                           
  HIGHEST WIND SPEED    37   HIGHEST WIND DIRECTION    NW (300)      
  HIGHEST GUST SPEED    50   HIGHEST GUST DIRECTION    NW (300)      
  AVERAGE WIND SPEED    18.9                                         

                                                                     
SKY COVER                                                            
  POSSIBLE SUNSHINE  MM                                              
  AVERAGE SKY COVER 0.5                                              

                                                                     
WEATHER CONDITIONS                                                  
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.                        
  LIGHT SNOW                                                         

                                                                     
RELATIVE HUMIDITY (PERCENT)                                          
 HIGHEST    93          1200 AM                                     
 LOWEST     33           100 PM                                     
 AVERAGE    63                                                       

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

                                                                     
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR                    
 MAXIMUM TEMPERATURE (F)   42        70      1990                    
 MINIMUM TEMPERATURE (F)   24        -7      1982                    

                                                                     
SUNRISE AND SUNSET                                                   
JANUARY 17 2020.......SUNRISE   726 AM EST   SUNSET   513 PM EST   
JANUARY 18 2020.......SUNRISE   726 AM EST   SUNSET   515 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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