WTMA20 FIMP 211830 TTT WARNING OF GALE FORCE WIND AT 21/1800 UTC, MODERATE TROPICAL STORM 4 (CHENGE) 990 HPA WAS CENTERED WITHIN 30 NM RADIUS OF POINT 10.1 S / 64.0 E (TEN DECIMAL ONE DEGREES SOUTH AND SIXTY FOUR DECIMAL ZERO DEGREES EAST). MOVEMENT: WEST-SOUTH-WEST 7 KT THREAT AREAS: SQUALLY WEATHER WITHIN A 100 NM RADIUS AROUND THE CENTER, EXTENDING UP TO 220 NM IN THE NORTH-WESTERN QUADRANT. GALE FORCE WINDS 35/45 KT AND VERY ROUGH TO HIGH SEAS WITHIN A 80 NM RADIUS FROM THE CENTRE, EXTENDING UP TO 100 NM IN THE SOUTH-EASTERN QUADRANT AND UP TO 105 NM IN THE WESTERN SEMI-CIRCLE. NEAR GALE FORCE WINDS 30 KT AND ROUGH TO VERY ROUGH SEAS WITHIN A 130 NM RADIUS FROM THE CENTRE, EXTENDING UP TO 150 NM IN THE NORTH-WESTERN QUADRANT, UP TO 240 NM IN THE SOUTH-WESTERN QUADRANT AND UP TO 260 NM IN THE SOUTH-EASTERN QUADRANT. STRONG GUSTS UNDER SQUALLS. END=