Aviation Digital Data Service (ADDS)

Output produced by METARs form (1601 UTC 28 March 2015)
found at http://aviationweather.gov/adds/metars/
 
KSFO 281500Z 2815/2918 26005KT P6SM FEW011 SCT200 
     FM282000 31010KT P6SM FEW250 
     FM282200 29020G28KT P6SM FEW250 
     FM290700 28015G20KT P6SM SKC 
     FM291000 28010KT P6SM SKC