Aviation Digital Data Service (ADDS)

Output produced by METARs form (1308 UTC 17 October 2017)
found at http://aviationweather.gov/adds/metars/
 
KORD 171120Z 1712/1818 22007KT P6SM SCT250 
     FM171400 22013G19KT P6SM FEW250 
     FM171800 23015G24KT P6SM FEW250 
     FM180000 21009KT P6SM SKC 
     FM181500 20013G23KT P6SM SKC