WSHO31 MHTG 081810 MHTG SIGMET A2 VALID 081810/082210 MHTG- MHCC CENTRAL AMERICAN FIR EMBD TS OBS AT 1800Z WI N1025 W10417 - N1320 W09427 - N0955 W09122 - N0514 W09707 TOP FL500 STNR NC=