Aviation Digital Data Service (ADDS)

Output produced by METARs form (2208 UTC 31 October 2014)
found at http://aviationweather.gov/adds/metars/
 
KIAD 312100Z 3121/0124 09004KT P6SM OVC050 
     FM010500 03004KT P6SM OVC060 
     FM011400 35013G20KT 3SM -SHRA OVC015 
     FM011800 35017G26KT P6SM OVC015 
     FM012100 34016G24KT P6SM BKN025