Aviation Digital Data Service (ADDS)

Output produced by TAFs form (1543 UTC 28 June 2017)
found at http://www.aviationweather.gov/adds/tafs/
 
KIAD 281508Z 2815/2918 28005KT P6SM FEW040 
     FM282000 22005KT P6SM FEW060 
     FM291400 21009KT P6SM SKC