WTMA20 FIMP 031830 TTT WARNING OF STORM FORCE AT 1800 UTC, SEVERE TROPICAL STORM INDUSA 988 HPA WAS CENTERED WITHIN 30 NM RADIUS OF POINT 17.7 S / 71.5 E (SEVENTEEN DECIMAL SEVEN DEGREES SOUTH AND SEVENTY ONE DECIMAL FIVE DEGREES EAST) AT 1800 UTC MOVEMENT: SOUTH-SOUTH-WEST 12 KT SQUALLY WEATHER WITHIN A 160 NM RADIUS AROUND THE CENTER, EXTENDING UP TO 280 NM IN THE SOUTHERN SEMI-CIRCLE. STORM FORCE WINDS 50/60 KT AND HIGH TO VERY HIGH SEAS EXTENDING UP TO 30 NM IN THE SOUTH-WESTERN QUADRANT, UP TO 35 NM IN THE NORTH-EASTERN QUADRANT AND UP TO 40 NM IN THE SOUTH-EASTERN QUADRANT. GALE FORCE WINDS 35/45 KT AND VERY ROUGH TO HIGH SEAS WITHIN A 40 NM RADIUS FROM THE CENTRE, EXTENDING UP TO 60 NM IN THE SOUTH-WESTERN QUADRANT, UP TO 65 NM IN THE NORTH-EASTERN QUADRANT AND UP TO 75 NM IN THE SOUTH-EASTERN QUADRANT. NEAR GALE FORCE WINDS 30 KT AND ROUGH TO VERY ROUGH SEAS WITHIN A 50 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=