WSGY31 SYCJ 041600 SYGC SIGMET A2 VALID 041600/042000 SYCJ - SYGC GEORGETOWN FIR ISOL EMBD TS OBS AT 1600Z WI N0754 W05948 - N0654 W05900 - N0554 W06054 - N0736 W06024 - N0754 W05948 TOP FL450 MOV W-NW INTSF=