Aviation Digital Data Service (ADDS)

Output produced by METARs form (1547 UTC 19 December 2014)
found at http://aviationweather.gov/adds/metars/
 
KBOS 191500Z 1915/2018 31011KT P6SM BKN035 
     FM191900 33010KT P6SM SCT035 
     FM200900 35007KT P6SM BKN020