WTXS32 PGTW 282100 MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI// SUBJ/TROPICAL CYCLONE 28S (DIANNE) WARNING NR 004// RMKS/ 1. TROPICAL CYCLONE 28S (DIANNE) WARNING NR 004 02 ACTIVE TROPICAL CYCLONES IN SOUTHIO MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE WIND RADII VALID OVER OPEN WATER ONLY --- WARNING POSITION: 281800Z --- NEAR 16.2S 123.8E MOVEMENT PAST SIX HOURS - 180 DEGREES AT 07 KTS POSITION ACCURATE TO WITHIN 060 NM POSITION BASED ON CENTER LOCATED BY A COMBINATION OF SATELLITE AND RADAR PRESENT WIND DISTRIBUTION: MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND RADIUS OF 034 KT WINDS - 055 NM NORTHEAST QUADRANT 040 NM SOUTHEAST QUADRANT 050 NM SOUTHWEST QUADRANT 045 NM NORTHWEST QUADRANT REPEAT POSIT: 16.2S 123.8E --- FORECASTS: 12 HRS, VALID AT: 290600Z --- 17.9S 123.9E MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND RADIUS OF 034 KT WINDS - 025 NM NORTHEAST QUADRANT 035 NM SOUTHEAST QUADRANT 045 NM SOUTHWEST QUADRANT 030 NM NORTHWEST QUADRANT VECTOR TO 24 HR POSIT: 180 DEG/ 07 KTS --- 24 HRS, VALID AT: 291800Z --- 19.2S 123.9E MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND VECTOR TO 36 HR POSIT: 155 DEG/ 06 KTS --- 36 HRS, VALID AT: 300600Z --- 20.3S 124.4E MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER LAND --- REMARKS: 282100Z POSITION NEAR 16.6S 123.8E. 28MAR25. TROPICAL CYCLONE 28S (DIANNE), LOCATED APPROXIMATELY 137 NM NORTHEAST OF BROOME, AUSTRALIA, HAS TRACKED SOUTHWARD AT 07 KNOTS OVER THE PAST SIX HOURS. ANIMATED ENHANCED INFRARED (EIR) IMAGERY, COMBINED WITH RADAR IMAGERY FROM BROOME, AUSTRALIA REVEAL THAT TC 28S HAS MADE LANDFALL SOUTHEAST OF THE KOOLAND ISLAND AND IS FORECAST TO CONTINUE TRACKING SOUTHWARD. SURFACE PRESSURE AND WIND DIRECTION OBSERVATIONS SUPPORT THE ASSESSED POSITION AS WELL. TC DIANNE WILL MAINTAIN 40-45 KTS INTENSITY FOR THE NEXT SIX HOURS, BUT IS FORECAST TO START WEAKENING MORE RAPIDLY ONCE IT PASSES SOUTH OF THE KING SOUND. TC 28S WILL FULLY DISSIPATE OVER LAND BY TAU 24, AFTER WHICH THE REMNANTS OF THE VORTEX WILL TRACK SOUTHEASTWARD AND FURTHER INLAND. THIS IS THE FINAL WARNING ON THIS SYSTEM BY THE JOINT TYPHOON WRNCEN PEARL HARBOR HI. THE SYSTEM WILL BE CLOSELY MONITORED FOR SIGNS OF REGENERATION. MINIMUM CENTRAL PRESSURE AT 281800Z IS 991 MB. REFER TO TROPICAL CYCLONE 27S (COURTNEY) WARNINGS (WTXS31 PGTW) FOR TWELVE-HOURLY UPDATES.// NNNN