WTXS51 PGTW 080800 WARNING ATCG MIL 21S SIO 150408071920 2015040806 21S IKOLA 006 02 090 12 SATL 060 T000 212S 0986E 035 T012 235S 1018E 030 AMP 000HR DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER 012HR DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER SUBJ: TROPICAL CYCLONE 21S (IKOLA) WARNING NR 006 1. TROPICAL CYCLONE 21S (IKOLA) WARNING NR 006 02 ACTIVE TROPICAL CYCLONES IN SOUTHIO MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE WIND RADII VALID OVER OPEN WATER ONLY --- WARNING POSITION: 080600Z --- NEAR 21.2S 98.6E MOVEMENT PAST SIX HOURS - 090 DEGREES AT 12 KTS POSITION ACCURATE TO WITHIN 060 NM POSITION BASED ON CENTER LOCATED BY SATELLITE PRESENT WIND DISTRIBUTION: MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER REPEAT POSIT: 21.2S 98.6E --- FORECASTS: 12 HRS, VALID AT: 081800Z --- 23.5S 101.8E MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT WIND RADII VALID OVER OPEN WATER ONLY DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER --- REMARKS: 080900Z POSITION NEAR 21.8S 99.4E. TROPICAL CYCLONE 21S (IKOLA), LOCATED APPROXIMATELY 866 NM WEST OF LEARMONTH, AUSTRALIA, HAS TRACKED EASTWARD AT 12 KNOTS OVER THE PAST SIX HOURS. ANIMATED MULTISPECTRAL SATELLITE IMAGERY DEPICTS THE LOW-LEVEL CIRCULATION CENTER (LLCC) HAS UNRAVELED AND THE BULK OF THE DEEP CONVECTION HAS DISPLACED 150 NM FROM THE LLCC. A 080308Z ASCAT PASS SHOWED A 30 TO 35 KNOT ELONGATED CIRCULATION WITH A FEW 40 TO 45 KNOT WIND BARBS OVER THE SOUTHEASTERN EDGE. SIGNIFICANTLY STRONG (40 TO 50 KNOT) VERTICAL WIND SHEAR WILL CONTINUE TO DETERIORATE THE SYSTEM LEADING TO ITS DISSIPATION BY THE END OF THE FORECAST PERIOD. 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. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 080600Z IS 16 FEET. FOR TWELVE-HOURLY UPDATES.// 2115040218 88S 877E 20 2115040300 91S 881E 20 2115040306 95S 883E 20 2115040312 102S 882E 20 2115040318 104S 877E 20 2115040400 105S 871E 20 2115040406 106S 869E 20 2115040412 108S 867E 20 2115040418 109S 865E 20 2115040500 114S 864E 25 2115040506 117S 870E 25 2115040512 121S 873E 25 2115040518 127S 878E 45 2115040600 135S 887E 55 2115040600 135S 887E 55 2115040606 142S 893E 65 2115040606 142S 893E 65 2115040612 149S 901E 80 2115040612 149S 901E 80 2115040612 149S 901E 80 2115040618 159S 912E 95 2115040618 159S 912E 95 2115040618 159S 912E 95 2115040700 170S 923E 105 2115040700 170S 923E 105 2115040700 170S 923E 105 2115040706 180S 934E 95 2115040706 180S 934E 95 2115040706 180S 934E 95 2115040712 192S 947E 85 2115040712 192S 947E 85 2115040712 192S 947E 85 2115040718 204S 960E 80 2115040718 204S 960E 80 2115040718 204S 960E 80 2115040800 212S 973E 50 2115040800 212S 973E 50 2115040806 212S 986E 35