Aviation Digital Data Service (ADDS)

Output produced by METARs form (1001 UTC 23 July 2014)
found at http://aviationweather.gov/adds/metars/
 
KIAD 230903Z 2309/2412 19006KT P6SM FEW090 
     FM231500 21007KT P6SM SCT050 BKN100 
     FM240200 31004KT P6SM BKN070