WTMA20 FIMP 041830 TTT WARNING OF HURRICANE FORCE WINDS AT 1800 UTC, TROPICAL CYCLONE 13 (INDUSA) 972 HPA WAS CENTRED WITHIN 30 NM RADIUS OF POINT 23.5 S / 70.0 E (TWENTY THREE DECIMAL FIVE DEGREES SOUTH AND SEVENTY DECIMAL ZERO DEGREES EAST). MOVEMENT: SOUTH 19 KT THREAT AREAS: SQUALLY WEATHER WITHIN A 150 NM RADIUS AROUND THE CENTER, EXTENDING UP TO 230 NM IN THE SOUTH-EASTERN SEMI-CIRCLE. HURRICANE FORCE WINDS 65/70 KT AND VERY HIGH TO PHENOMENAL SEAS EXTENDING UP TO 15 NM IN THE SOUTH-WESTERN QUADRANT AND UP TO 20 NM IN THE EASTERN SEMI-CIRCLE. STORM FORCE WINDS 50/60 KT AND HIGH TO VERY HIGH SEAS WITHIN A 20 NM RADIUS FROM THE CENTRE, EXTENDING UP TO 35 NM IN THE EASTERN SEMI-CIRCLE. GALE FORCE WINDS 35/45 KT AND VERY ROUGH TO HIGH SEAS WITHIN A 30 NM RADIUS FROM THE CENTRE, EXTENDING UP TO 90 NM IN THE EASTERN SEMI-CIRCLE. NEAR GALE FORCE WINDS 30 KT AND ROUGH TO VERY ROUGH SEAS WITHIN A 75 NM RADIUS FROM THE CENTRE, EXTENDING UP TO 90 NM IN THE SOUTH-WESTERN QUADRANT AND UP TO 130 NM IN THE EASTERN SEMI-CIRCLE. STRONG GUSTS UNDER SQUALLS. END=