Aviation Digital Data Service (ADDS)

Output produced by TAFs form (1108 UTC 18 October 2017)
found at http://www.aviationweather.gov/adds/tafs/
 
KIAD 180855Z 1809/1912 00000KT P6SM SKC 
     FM181800 19005KT P6SM FEW250 
     FM190300 00000KT P6SM FEW250