Aviation Digital Data Service (ADDS)

Output produced by METARs form (0253 UTC 19 April 2014)
found at http://aviationweather.gov/adds/metars/
 
KORD 182320Z 1900/2006 05011KT P6SM SKC 
     FM190100 06005KT P6SM SKC 
     FM191600 11010KT P6SM FEW350 
     FM200100 15010KT P6SM SCT300