WSHO31 MHTG 220850 MHTG SIGMET F3 VALID 220850/221250 MHTG- MHCC CENTRAL AMERICAN FIR EMBD TS OBS AT 0840Z WI N0743 W08716 - N0457 W08755 - N0735 W09513 - N0957 W09137 TOP FL480 STNR WKN NC=