WTSS20 VHHH 191045 TROPICAL CYCLONE WARNING AT 190900 UTC, TROPICAL STORM DIANMU (1608) WITH CENTRAL PRESSURE 984 HECTOPASCALS WAS CENTRED WITHIN 60 NAUTICAL MILES OF TWO ZERO POINT EIGHT DEGREES NORTH (20.8 N) ONE ZERO FIVE POINT NINE DEGREES EAST (105.9 E) AND IS FORECAST TO WEAKEN AND MOVE WEST AT ABOUT 15 KNOTS FOR THE NEXT 24 HOURS. MAXIMUM WINDS NEAR THE CENTRE ARE ESTIMATED TO BE 40 KNOTS. RADIUS OF OVER 33 KNOT WINDS 60 NAUTICAL MILES OVER EASTERN SEMICIRCLE, 30 NAUTICAL MILES ELSEWHERE. RADIUS OF OVER 2 METRE WAVES 150 NAUTICAL MILES. FORECAST POSITION AND INTENSITY AT 200900 UTC DISSIPATED OVER LAND.