Aviation Digital Data Service (ADDS)

Output produced by METARs form (1508 UTC 21 December 2014)
found at http://www.aviationweather.gov/adds/metars/
 
KIAD 211501Z 2115/2218 VRB04KT P6SM OVC060 
     FM211800 VRB04KT P6SM SCT050 
     FM221100 VRB04KT P6SM SCT050 BKN090 
     FM221700 VRB03KT P6SM -RA OVC030