Aviation Digital Data Service (ADDS)

Output produced by METARs form (1804 UTC 12 December 2017)
found at http://aviationweather.gov/adds/metars/
 
KROC 121737Z 1218/1318 28015G25KT P6SM -SN SCT015 OVC022 
     TEMPO 1218/1222 3SM -SHSN BKN015 OVC025 
     FM130300 27014G22KT 1/2SM SN OVC007 
     FM130600 30017G24KT 2SM -SN BLSN OVC015 
     FM131000 30017G25KT P6SM OVC015 
     FM131700 28019KT P6SM BKN020