Aviation Digital Data Service (ADDS)

Output produced by METARs form (1637 UTC 18 April 2015)
found at http://aviationweather.gov/adds/metars/
 
KAOO 181521Z 1815/1912 VRB04KT P6SM SCT250 
     FM181600 26005KT P6SM SCT250 
     FM181730 31009KT P6SM FEW060 SCT250 
     FM190100 01004KT P6SM SCT250