FTUS43 KDMX 031739 TAFOTM TAF KOTM 031739Z 0318/0418 20014KT 6SM -SHRA OVC035 FM032000 21012G21KT 5SM -SHRA OVC020 FM040000 33011G19KT 5SM -SHRA OVC006 FM040400 36009KT P6SM OVC030=