WTXS31 PGTW 080730

MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//

SUBJ/TROPICAL CYCLONE 21S (IKOLA) WARNING NR 006//

RMKS/

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.

REFER TO TROPICAL CYCLONE 22S (JOALANE) WARNINGS (WTXS32 PGTW)

FOR TWELVE-HOURLY UPDATES.//