Aviation Digital Data Service (ADDS)

Output produced by METARs form (1252 UTC 19 April 2014)
found at http://aviationweather.gov/adds/metars/
 
KBOS 191121Z 1912/2018 25008KT P6SM FEW120 
     FM191500 30012G22KT P6SM FEW050 FEW250 
     FM192300 34010G20KT P6SM SKC 
     FM200300 36008KT P6SM SKC 
     FM201300 04008KT P6SM FEW250