AFOS product CLIIAD
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CDUS41 KLWX 170536
CLIIAD


CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC                  
136 AM EDT MON APR 17 2017


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

...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR APRIL 16 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1962 TO 2017


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST     
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR     
                                                  NORMAL             
..................................................................
TEMPERATURE (F)                                                     
 YESTERDAY                                                           
  MAXIMUM         86    238 PM  91    2002  67     19       71       
  MINIMUM         63    627 AM  28    1981  42     21       34       
  AVERAGE         75                        55     20       53      
                                                                     
PRECIPITATION (IN)                                                   
  YESTERDAY        T             2.43 1993   0.11  -0.11     0.00    
  MONTH TO DATE    1.64                      1.88  -0.24     1.19    
  SINCE MAR 1      5.76                      5.26   0.50     2.64    
  SINCE JAN 1      9.20                     10.68  -1.48    10.90    
                                                                     
SNOWFALL (IN)                                                        
  YESTERDAY        0.0           T    1988   0.1   -0.1              
  MONTH TO DATE    T                         0.3   -0.3              
  SINCE JUL 1      7.3                      22.0  -14.7              
  SNOW DEPTH       0                                                 
                                                                     
DEGREE DAYS                                                          
 HEATING                                                             
  YESTERDAY        0                        11    -11       12       
  MONTH TO DATE  123                       212    -89      257       
  SINCE MAR 1    763                       859    -96      703       
  SINCE JUL 1   3656                      4449   -793     3794       
                                                                     
 COOLING                                                             
  YESTERDAY       10                         1      9        0       
  MONTH TO DATE   23                         4     19        8       
  SINCE MAR 1     25                         7     18       13       
  SINCE JAN 1     25                         7     18       13       
..................................................................


WIND (MPH)                                                           
  HIGHEST WIND SPEED    21   HIGHEST WIND DIRECTION     W (260)      
  HIGHEST GUST SPEED    32   HIGHEST GUST DIRECTION     W (270)      
  AVERAGE WIND SPEED     9.2                                         

                                                                     
SKY COVER                                                            
  POSSIBLE SUNSHINE  MM                                              
  AVERAGE SKY COVER 0.5                                              

                                                                     
WEATHER CONDITIONS                                                  
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.                        
  THUNDERSTORM                                                       
  LIGHT RAIN                                                         

                                                                     
RELATIVE HUMIDITY (PERCENT)                                          
 HIGHEST    78          1200 AM                                     
 LOWEST     31           200 PM                                     
 AVERAGE    55                                                       

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

                                                                     
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR                    
 MAXIMUM TEMPERATURE (F)   67        93      2002                    
 MINIMUM TEMPERATURE (F)   43        27      1983                    

                                                                     
SUNRISE AND SUNSET                                                   
APRIL 17 2017.........SUNRISE   630 AM EDT   SUNSET   749 PM EDT   
APRIL 18 2017.........SUNRISE   629 AM EDT   SUNSET   750 PM EDT   

                                                                    
-  INDICATES NEGATIVE NUMBERS.                                      
R  INDICATES RECORD WAS SET OR TIED.                                
MM INDICATES DATA IS MISSING.                                       
T  INDICATES TRACE AMOUNT.                                          




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