South Pacific: TC 15P(UESI) undergoing rapid intensification, update at 09/21UTC

TC 15P(UESI) SOUTH PACIFIC
As of 18:00 UTC Feb 09, 2020:
Location: 16.4°S 163.6°E
Maximum Winds: 55 kt ( 100km/h)
Gusts: 70 kt ( 130km/h)
Minimum Central Pressure: 986 mb
TPPS10 PGTW 092117
A. TROPICAL CYCLONE 15P (UESI)
B. 09/2050Z
C. 16.62S
D. 163.24E
E. FIVE/HMWRI8
F. T3.5/3.5/D1.5/24HRS  STT: D0.5/03HRS
G. IR/EIR/VIS/MSI
H. REMARKS: 40A/PBO SBC/ANMTN. CNVCTN WRAPS .85 ON LOG10 SPIRAL
YIELDING A DT OF 3.5. MET/PT AGREE. DBO DT.
I. ADDITIONAL POSITIONS:
   09/1642Z  16.13S  163.63E  SSMI
   09/1726Z  16.35S  163.62E  SSMS
   09/1831Z  16.67S  163.48E  AMS2
   09/1927Z  16.55S  163.38E  SSMS
MARTIN
REMARKS:
092100Z POSITION NEAR 16.6S 163.6E.
09FEB20. TROPICAL CYCLONE (TC) 15P (UESI), LOCATED APPROXIMATELY
281 NM WEST-NORTHWEST OF PORT VILA, VANUATU, HAS TRACKED SOUTHWARD
AT 06 KNOTS (KTS) OVER THE PAST SIX HOURS. ANIMATED ENHANCED
INFRARED (EIR) SATELLITE IMAGERY REVEALS DEEP CONVECTIVE BANDING
WRAPPING UNDER DEEP CONVECTION OBSCURING THE LOW LEVEL CIRCULATION
CENTER (LLCC). A 091926Z SSMIS 91 GHZ MICROWAVE IMAGE DEPICTS A
BAND OF DEEP CONVECTION IN THE EASTERN AND SOUTHERN SEMICIRCLES
WRAPPING TIGHTLY INTO A WELL-DEFINED LLCC. THESE IMAGES LEND HIGH
CONFIDENCE TO THE INITIAL POSITION. SET AT 55 KTS, THE INITIAL
INTENSITY IS BASED ON A 091840Z ADVANCED DVORAK TECHNIQUE
INTENSITY ESTIMATE OF T3.5 (55 KTS), A SATELLITE CONSENSUS
ESTIMATE OF 52 KTS, AND DVORAK CURRENT INTENSITY ESTIMATES OF T3.0
(45 KTS, PGTW) AND T3.5 (55 KTS, KNES AND NFFN). THE INITIAL
INTENSITY IS HEDGED ON THE HIGHER END OF THE INTENSITY FIXES DUE
TO SIGNIFICANT IMPROVEMENTS IN THE CONVECTIVE STRUCTURE. THE
SYSTEM IS UNDERGOING RAPID INTENSIFICATION. TC 15P IS TRACKING
ALONG THE WESTERN PERIPHERY OF A SUBTROPICAL RIDGE WITHIN AN
OVERALL FAVORABLE ENVIRONMENT FOR FURTHER INTENSIFICATION. THE LOW
(10-15 KT) VERTICAL WIND SHEAR (VWS), WARM (28-29 CELSIUS) SEA
SURFACE TEMPERATURES (SST), AND EXCELLENT POLEWARD OUTFLOW WILL
ALLOW TC 15P TO CONTINUE TO INTENSIFY TO A PEAK INTENSITY OF 80
KTS BY TAU 36. A SLIGHT WEAKENING IS ANTICIPATED AS THE SYSTEM
TRACKS OVER NEW CALEDONIA. AFTER TAU 60, TC 15P WILL EXPERIENCE
DECREASING DIVERGENCE ALOFT AND INCREASING (25-30 KT) VWS AS THE
SYSTEM BEGINS TO INTERACT WITH A DEEPENING UPPER LEVEL TROUGH TO
THE SOUTH. AS THE SYSTEM BECOMES EMBEDDED, ADDITIONAL
INTENSIFICATION WILL BE LIMITED AND THE SYSTEM WILL GRADUALLY
WEAKEN. NUMERICAL MODELS AGREE ON A GENERALLY SOUTHWARD TRACK.
HOWEVER, THEY ARE IN POOR OVERALL AGREEMENT WITH A SPREAD OF 314
NM AT TAU 72. THE LARGE SPREAD IN MODEL SOLUTIONS PLACES LOW
CONFIDENCE IN THE OVERALL JTWC FORECAST TRACK. MAXIMUM SIGNIFICANT
WAVE HEIGHT AT 091800Z IS 16 FEET. NEXT WARNINGS AT 100300Z,
100900Z, 101500Z AND 102100Z.//
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