Aviation Digital Data Service (ADDS)

Output produced by METARs form (2315 UTC 18 April 2014)
found at http://aviationweather.gov/adds/metars/
 
KAOO 182122Z 1821/1918 17006KT P6SM BKN150 
     FM182300 20006KT P6SM BKN150 
     FM190600 15002KT P6SM SKC