Aviation Digital Data Service (ADDS)

Output produced by METARs form (0321 UTC 18 August 2017)
found at http://www.aviationweather.gov/adds/metars/
 
KBOS 172320Z 1800/1906 20007KT P6SM FEW250 
     FM181200 17005KT P6SM VCSH OVC050 
     FM181600 17010G17KT 3SM -SHRA BR SCT008 OVC010 
     FM181900 18010KT 4SM -SHRA BR OVC008 
     FM190500 19009KT 5SM BR VCSH BKN010 OVC070