WSHO31 MHTG 061915 MHTG SIGMET I2 VALID 061915/062315 MHTG- MHCC CENTRAL AMERICAN FIR FRQ TS OBS AT 1910Z WI N0824 W08408 - N0758 W08255 - N0558 W08255 - N0616 W08435 TOP FL480 MOV SW 05KT NC=