WTPS32 PGTW 270900

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

SUBJ/TROPICAL CYCLONE WARNING//

RMKS/

1. TROPICAL CYCLONE 17P (IRIS) WARNING NR 011

   01 ACTIVE TROPICAL CYCLONE IN SOUTHPAC

   MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE

   WIND RADII VALID OVER OPEN WATER ONLY

    ---

   WARNING POSITION:

   270600Z --- NEAR 20.2S 158.3E

     MOVEMENT PAST SIX HOURS - 170 DEGREES AT 07 KTS

     POSITION ACCURATE TO WITHIN 010 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: 20.2S 158.3E

    ---

   FORECASTS:

   12 HRS, VALID AT:

   271800Z --- 21.5S 158.9E

   MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT

   WIND RADII VALID OVER OPEN WATER ONLY

   DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER

    ---

REMARKS:

270900Z POSITION NEAR 20.5S 158.4E.

TROPICAL CYCLONE (TC) 17P (IRIS), LOCATED APPROXIMATELY 451 NM WEST-

NORTHWEST OF NOUMEA, NEW CALEDONIA, HAS TRACKED SOUTHWARD AT 07 KNOTS

OVER THE PAST SIX HOURS. ANIMATED MSI SHOWS THE ASSOCIATED FLARING

CONVECTION HAS SIGNIFICANTLY COLLAPSED AS IT REMAINED SHEARED

EASTWARD OF A FULLY EXPOSED LLCC. THE INITIAL POSITION IS BASED WITH

HIGH CONFIDENCE ON THE WELL-DEFINED LLCC IN THE MSI LOOP. THE INITIAL

INTENSITY OF 30 KNOTS, WHICH IS NOW BELOW JTWC WARNING CRITERIA, IS

BASED ON THE DVORAK ESTIMATE FROM PGTW AND SUPPORTED BY A RECENT

ASCAT DIRECT PASS SHOWING MAXIMUM OF 30 KNOTS ALONG THE EASTERN FLANK

UNDER THE CONVECTION. AS THE SYSTEM CONTINUES TO TRACK POLEWARD, THE

VWS IS EXPECTED TO FURTHER INCREASE AND SSTS TO DECREASE. THE

COMBINED EFFECT WILL FURTHER ERODE THE SYSTEM. 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 270600Z IS 12 FEET.//