Cyclocane

WTPS32 PGTW 062100
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL CYCLONE FINAL WARNING//
RMKS/
1. TROPICAL CYCLONE 17P (IRIS) WARNING NR 031    
   01 ACTIVE TROPICAL CYCLONE IN SOUTHPAC
   MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
   WIND RADII VALID OVER OPEN WATER ONLY
    ---
   WARNING POSITION:
   061800Z --- NEAR 18.3S 153.1E
     MOVEMENT PAST SIX HOURS - 330 DEGREES AT 08 KTS
     POSITION ACCURATE TO WITHIN 030 NM
     POSITION BASED ON CENTER LOCATED BY A COMBINATION OF 
     SATELLITE AND SYNOPTIC DATA
   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: 18.3S 153.1E
    ---
   FORECASTS:
   12 HRS, VALID AT:
   070600Z --- 17.3S 152.7E
   MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
    ---
REMARKS:
062100Z POSITION NEAR 18.0S 153.0E.
TROPICAL CYCLONE (TC) 17P (IRIS), LOCATED APPROXIMATELY 426 NM EAST-
SOUTHEAST OF CAIRNS, AUSTRALIA, HAS TRACKED NORTH-NORTHWESTWARD
AT 08 KNOTS OVER THE PAST SIX HOURS. ANIMATED ENHANCED INFRARED 
SATELLITE IMAGERY DEPICTS AN EXPOSED, DEFINED LOW-LEVEL CIRCULATION 
CENTER WITH NO SIGNIFICANT DEEP CONVECTION. A 061728Z SSMIS 37GHZ 
IMAGE INDICATES LIMITED, SHALLOW CONVECTIVE BANDING OVER THE 
SOUTHWEST QUADRANT, ASSOCIATED WITH A BAND OF 25-30 KNOT GRADIENT 
WINDS, AND WEAK, FRAGMENTED BANDING ELSEWHERE. SURFACE OBSERVATIONS 
FROM MARION REEF VERIFY THE 25-30 KNOT SOUTH-SOUTHEASTERLY WINDS 
WHILE LIHOU REEF AND A RECENT SHIP OBSERVATION SUPPORT MUCH WEAKER 
WINDS (10-15 KNOTS) OVER THE NORTHERN AND EASTERN SEMICIRCLES. THE 
INITIAL INTENSITY IS ASSESSED AT 30 KNOTS BASED ON THE OVERALL WIND 
STRUCTURE AS DEPICTED IN RECENT ASCAT. TC 17P IS FORECAST TO TRACK 
NORTH-NORTHWESTWARD THROUGH THE FORECAST PERIOD WHILE SLOWLY 
WEAKENING. AS SHOWN IN THE NAVGEM MODEL, THERE IS SOME POTENTIAL FOR 
THE SYSTEM TO REGENERATE IN 3-4 DAYS AS IT TRACKS EQUATORWARD OVER 
WARMER WATER. OVERALL, THERE IS LOW CONFIDENCE IN THE EXACT FORECAST 
TRACK DUE TO THE SHALLOW NATURE OF THE SYSTEM AND THE LOW-LEVEL 
STEERING INFLUENCE (SUBTROPICAL RIDGE POSITIONED TO THE WEST). 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 061800Z IS 12 
FEET.//
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Public Advisory not available for this storm.

TROPICAL CYCLONE IRIS Forecast Discussion

Forecast Discussion not available for this storm.

IRIS storm path from JTWC

Time	Speed	Location	Status
2018-04-06T18:00:00.000Z	30 knots	-18.3, 153.1	dissipated
2018-04-07T06:00:00.000Z	30 knots	-17.3, 152.7	dissipated

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