WTXS31 PGTW 280900 MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI// SUBJ/TROPICAL CYCLONE 05S (FIVE) WARNING NR 004// RMKS/ 1. TROPICAL CYCLONE 05S (FIVE) WARNING NR 004 01 ACTIVE TROPICAL CYCLONE IN SOUTHIO MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE WIND RADII VALID OVER OPEN WATER ONLY --- WARNING POSITION: 280600Z --- NEAR 14.4S 96.0E MOVEMENT PAST SIX HOURS - 210 DEGREES AT 08 KTS POSITION ACCURATE TO WITHIN 060 NM POSITION BASED ON CENTER LOCATED BY SATELLITE PRESENT WIND DISTRIBUTION: MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER REPEAT POSIT: 14.4S 96.0E --- FORECASTS: 12 HRS, VALID AT: 281800Z --- 15.2S 95.9E MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER --- REMARKS: 280900Z POSITION NEAR 14.6S 96.0E. 28DEC24. TROPICAL CYCLONE 05S (FIVE), LOCATED APPROXIMATELY 142 NM SOUTH-SOUTHWEST OF THE COCOS ISLANDS, HAS TRACKED SOUTH- SOUTHWESTWARD AT 08 KNOTS OVER THE PAST SIX HOURS. ANIMATED MULTISPECTRAL SATELLITE IMAGERY (MSI) DEPICTS A ONCE-AGAIN FULLY EXPOSED LOW LEVEL CIRCULATION CENTER (LLCC), DISPLACED TO THE NORTHEAST OF RAPIDLY WEAKENING CONVECTION. THE ANIMATED MSI INDICATES THAT THE SYSTEM HAS MULTIPLE VORTICES ROTATING AROUND A RAGGED BUT DEFINED CENTER AND THE INITIAL POSITION WAS PLACED IN THE CENTROID OF THE MULTI-VORTEX CIRCULATION WITH HIGH CONFIDENCE. THE INITIAL INTENSITY IS ASSESSED AT 30 KNOTS WITH HIGH CONFIDENCE, BASED PRIMARILY ON A 280307Z ASCAT-B BULLSEYE PASS WHICH REVEALED A MUCH WEAKER WIND FIELD THAN PREVIOUSLY ASSESSED. MAXIMUM WINDS WERE UNDER THE CONVECTION TO THE SOUTH OF THE LLCC, BUT REGARDLESS, WERE SHOWN TO BE JUST 30-34 KNOTS. THE REMAINDER OF THE WIND FIELD IS PREDOMINANTLY LESS THAN 30 KNOTS. THE ENVIRONMENT IS UNFAVORABLE, WITH MODERATE (20- 25 KNOTS) NORTHEASTERLY SHEAR, DRY MID-LEVEL AIR WRAPPING UP ACROSS THE NORTHERN REACHES OF THE CIRCULATION AND RELATIVELY COOL (25-26C) SSTS BEING THE PRIMARY NEGATIVE INFLUENCES. POLEWARD OUTFLOW IS STRONG HOWEVER, FLOWING SOUTHWARD INTO A BROAD TROUGH PASSING TO THE SOUTH. TC 05S WILL CONTINUE TO SLOWLY DRIFT SOUTHWARD IN A GENERALLY WEAK STEERING PATTERN, CONTINUE TO FACE MODERATE TO STRONG NORTHEASTERLY WIND SHEAR, BECOME INCREASINGLY SMOTHERED BY DRY MID-LEVEL AIR AND MOVE INTO COOLER WATERS, RESULTING IN A CONTINUED WEAKENING TREND THROUGH THE NEXT 12 HOURS. THE REMNANT LOW-LEVEL VORTEX IS LIKELY TO PERSIST FOR SOME TIME, TURNING TO A WEST-SOUTHWESTWARD TRACK AND MAINTAINING WINDS IN THE 25-30 KNOT RANGE. THUS, IT WILL BEAR CLOSE WATCHING FOR ANY SIGNS OF REGENERATION. 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 280600Z IS 1003 MB. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 280600Z IS 12 FEET. // NNNN