WTMA20 FIMP 100647 TTT WARNING OF STORM FORCE WINDS MODERATE TROPICAL STORM CHIDO HAS INTENSIFIED INTO A SEVERE TROPICAL STORM. AT 0600UTC, SEVERE TROPICAL STORM 4 (CHIDO) 988 HPA WAS CENTRED WITHIN 20 NM RADIUS OF POINT 10.9S 60.8E (TEN DECIMAL NINE DEGREES SOUTH AND SIXTY DECIMAL EIGHT DEGREES EAST). MOVEMENT: WEST 8 KT THREAT AREAS: SQUALLY WEATHER WITHIN A 80 NM RADIUS AROUND THE CENTER, EXTENDING UP TO 130 NM IN THE NORTHERN SEMI-CIRCLE. STORM FORCE WINDS 50/55 KT AND HIGH TO VERY HIGH SEAS WITHIN A 25 NM RADIUS FROM THE CENTRE, EXTENDING UP TO 30 NM IN THE NORTH-WESTERN AND SOUTH-EASTERN QUADRANTS. 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-EASTERN QUADRANT, UP TO 80 NM IN THE SOUTH-WESTERN QUADRANT AND UP TO 95 NM IN THE NORTH-WESTERN 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-EASTERN QUADRANT, UP TO 110 NM IN THE SOUTH-WESTERN QUADRANT AND UP TO 120 NM IN THE NORTH-WESTERN QUADRANT. STRONG GUSTS UNDER SQUALLS.=