Aviation Digital Data Service (ADDS)

Output produced by METARs form (0942 UTC 23 July 2014)
found at http://aviationweather.gov/adds/metars/
 
KLAS 230846Z 2309/2406 21009KT P6SM SKC 
     FM231600 10007KT P6SM SCT250 
     FM232100 21012KT P6SM FEW150 SCT250