WSHO31 MHTG 161158 MHTG SIGMET A3 VALID 161155/161555 MHTG- MHCC CENTRAL AMERICAN FIR EMBD TS OBS AT 1150Z WI N1347 W09212 - N1418 W08924 - N1144 W08826 - N1030 W09015 TOP FL520 MOV W 05KT INTSF=