WTPS31 PHNC 280900
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL CYCLONE 16P (SIXTEEN) WARNING NR 001//
RMKS/
1. TROPICAL CYCLONE 16P (SIXTEEN) WARNING NR 001
01 ACTIVE TROPICAL CYCLONE IN SOUTHPAC
MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
WIND RADII VALID OVER OPEN WATER ONLY
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WARNING POSITION:
280600Z --- NEAR 16.1S 179.5W
MOVEMENT PAST SIX HOURS - 110 DEGREES AT 09 KTS
POSITION ACCURATE TO WITHIN 020 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
REPEAT POSIT: 16.1S 179.5W
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FORECASTS:
12 HRS, VALID AT:
281800Z --- 17.9S 178.2W
MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS - 035 NM NORTHEAST QUADRANT
035 NM SOUTHEAST QUADRANT
035 NM SOUTHWEST QUADRANT
035 NM NORTHWEST QUADRANT
VECTOR TO 24 HR POSIT: 165 DEG/ 10 KTS
---
24 HRS, VALID AT:
010600Z --- 19.9S 177.6W
MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS - 050 NM NORTHEAST QUADRANT
060 NM SOUTHEAST QUADRANT
060 NM SOUTHWEST QUADRANT
050 NM NORTHWEST QUADRANT
VECTOR TO 36 HR POSIT: 155 DEG/ 09 KTS
---
36 HRS, VALID AT:
011800Z --- 21.5S 176.8W
MAX SUSTAINED WINDS - 050 KT, GUSTS 065 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS - 070 NM NORTHEAST QUADRANT
080 NM SOUTHEAST QUADRANT
080 NM SOUTHWEST QUADRANT
070 NM NORTHWEST QUADRANT
VECTOR TO 48 HR POSIT: 155 DEG/ 09 KTS
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EXTENDED OUTLOOK:
48 HRS, VALID AT:
020600Z --- 23.2S 175.9W
MAX SUSTAINED WINDS - 055 KT, GUSTS 070 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 050 KT WINDS - 030 NM NORTHEAST QUADRANT
030 NM SOUTHEAST QUADRANT
030 NM SOUTHWEST QUADRANT
030 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 090 NM NORTHEAST QUADRANT
110 NM SOUTHEAST QUADRANT
110 NM SOUTHWEST QUADRANT
090 NM NORTHWEST QUADRANT
VECTOR TO 72 HR POSIT: 140 DEG/ 11 KTS
---
72 HRS, VALID AT:
030600Z --- 26.5S 172.8W
MAX SUSTAINED WINDS - 060 KT, GUSTS 075 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 050 KT WINDS - 040 NM NORTHEAST QUADRANT
050 NM SOUTHEAST QUADRANT
050 NM SOUTHWEST QUADRANT
040 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 110 NM NORTHEAST QUADRANT
130 NM SOUTHEAST QUADRANT
130 NM SOUTHWEST QUADRANT
110 NM NORTHWEST QUADRANT
VECTOR TO 96 HR POSIT: 135 DEG/ 13 KTS
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LONG RANGE OUTLOOK:
---
96 HRS, VALID AT:
040600Z --- 30.2S 168.5W
MAX SUSTAINED WINDS - 060 KT, GUSTS 075 KT
WIND RADII VALID OVER OPEN WATER ONLY
VECTOR TO 120 HR POSIT: 140 DEG/ 25 KTS
---
120 HRS, VALID AT:
050600Z --- 37.4S 160.0W
MAX SUSTAINED WINDS - 050 KT, GUSTS 065 KT
WIND RADII VALID OVER OPEN WATER ONLY
BECOMING EXTRATROPICAL
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REMARKS:
280900Z POSITION NEAR 16.5S 179.2W.
TROPICAL CYCLONE (TC) 16P (SIXTEEN), LOCATED APPROXIMATELY 170 NM
NORTHEAST OF SUVA, FIJI, HAS TRACKED EAST-SOUTHEASTWARD AT 09
KNOTS OVER THE PAST SIX HOURS. ANIMATED MULTISPECTRAL SATELLITE
IMAGERY (MSI) SHOWS THE SYSTEM HAS FURTHER CONSOLIDATED AS FORMATIVE
BANDS WRAPPED TIGHTER INTO A LOW LEVEL CIRCULATION CENTER THAT HAS
BECOME BETTER-DEFINED. THE INITIAL POSITION IS BASED ON THE MSI LOOP
WITH FAIR CONFIDENCE. THE INITIAL INTENSITY IS BASED ON THE HIGHER
END OF DVORAK ESTIMATES FROM PGTW, KNES, NFFN, AND ABRF. UPPER LEVEL
ANALYSIS INDICATES THE SYSTEM IS UNDER A RIDGE AXIS IN AN AREA OF
LIGHT TO MODERATE (10-15 KNOT) VERTICAL WIND SHEAR (VWS) AND GOOD
POLEWARD OUTFLOW. A MID-LAYERED SUBTROPICAL RIDGE TO THE EAST HAS
ASSUMED STEERING AND IS EXPECTED TO BE THE DOMINANT DRIVER OF THE
CYCLONE THROUGHOUT THE FORECAST. TC 16P WILL GRADUALLY INTENSIFY,
PEAKING AT 60 KNOTS FROM TAU 72-96 BEFORE ACCELERATING TOWARDS
EXTRA-TROPICAL TRANSITION AND HIGHER VWS. THE AVAILABLE NUMERIC
GUIDANCE IS IN TIGHT AGREEMENT, LENDING HIGH CONFIDENCE TO THE JTWC
TRACK FORECAST. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 280600Z IS 10
FEET. NEXT
WARNINGS AT 282100Z AND 010900Z. THIS WARNING SUPERSEDES AND
CANCELS REF A (WTPS21 PGTW 272100).
