WSHO31 MHTG 182113 MHTG SIGMET E1 VALID 182113/190113 MHTG- MHCC CENTRAL AMERICAN FIR FRQ TS OBS AT 2110Z WI N1841 W08915 - N1912 W08835 - N1833 W08734 - N1736 W08822 TOP FL500 STNR INTSF=