Aviation Digital Data Service (ADDS)

Output produced by METARs form (1540 UTC 18 September 2014)
found at http://www.aviationweather.gov/adds/metars/
 
KDCA 181503Z 1815/1912 VRB03KT P6SM SCT035 BKN050 
     FM182300 VRB03KT P6SM FEW035 SCT050 
     FM191000 03006KT P6SM SCT090