Aviation Digital Data Service (ADDS)

Output produced by METARs form (1929 UTC 16 September 2014)
found at http://www.aviationweather.gov/adds/metars/
 
KORD 161720Z 1618/1724 33005KT P6SM FEW035 
     FM170200 24003KT P6SM SKC 
     FM171400 24005KT P6SM SCT080