

MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL CYCLONE 08S (EIGHT) WARNING NR 001//
RMKS/
1. TROPICAL CYCLONE 08S (EIGHT) WARNING NR 001
01 ACTIVE TROPICAL CYCLONE IN SOUTHIO
MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
WIND RADII VALID OVER OPEN WATER ONLY
---
WARNING POSITION:
091800Z --- NEAR 11.9S 86.3E
MOVEMENT PAST SIX HOURS - 255 DEGREES AT 13 KTS
POSITION ACCURATE TO WITHIN 030 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: 11.9S 86.3E
---
FORECASTS:
12 HRS, VALID AT:
100600Z --- 13.0S 83.8E
MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS - 030 NM NORTHEAST QUADRANT
040 NM SOUTHEAST QUADRANT
030 NM SOUTHWEST QUADRANT
030 NM NORTHWEST QUADRANT
VECTOR TO 24 HR POSIT: 250 DEG/ 11 KTS
---
24 HRS, VALID AT:
101800Z --- 13.8S 81.6E
MAX SUSTAINED WINDS - 050 KT, GUSTS 065 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS - 040 NM NORTHEAST QUADRANT
050 NM SOUTHEAST QUADRANT
045 NM SOUTHWEST QUADRANT
035 NM NORTHWEST QUADRANT
VECTOR TO 36 HR POSIT: 245 DEG/ 09 KTS
---
36 HRS, VALID AT:
110600Z --- 14.5S 80.0E
MAX SUSTAINED WINDS - 060 KT, GUSTS 075 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 050 KT WINDS - 030 NM NORTHEAST QUADRANT
035 NM SOUTHEAST QUADRANT
035 NM SOUTHWEST QUADRANT
030 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 055 NM NORTHEAST QUADRANT
070 NM SOUTHEAST QUADRANT
060 NM SOUTHWEST QUADRANT
050 NM NORTHWEST QUADRANT
VECTOR TO 48 HR POSIT: 235 DEG/ 10 KTS
---
EXTENDED OUTLOOK:
48 HRS, VALID AT:
111800Z --- 15.6S 78.3E
MAX SUSTAINED WINDS - 070 KT, GUSTS 085 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 064 KT WINDS - 025 NM NORTHEAST QUADRANT
025 NM SOUTHEAST QUADRANT
025 NM SOUTHWEST QUADRANT
025 NM NORTHWEST QUADRANT
RADIUS OF 050 KT WINDS - 040 NM NORTHEAST QUADRANT
040 NM SOUTHEAST QUADRANT
040 NM SOUTHWEST QUADRANT
040 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 065 NM NORTHEAST QUADRANT
070 NM SOUTHEAST QUADRANT
070 NM SOUTHWEST QUADRANT
060 NM NORTHWEST QUADRANT
VECTOR TO 72 HR POSIT: 230 DEG/ 07 KTS
---
72 HRS, VALID AT:
121800Z --- 17.3S 76.2E
MAX SUSTAINED WINDS - 100 KT, GUSTS 125 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 064 KT WINDS - 040 NM NORTHEAST QUADRANT
045 NM SOUTHEAST QUADRANT
045 NM SOUTHWEST QUADRANT
040 NM NORTHWEST QUADRANT
RADIUS OF 050 KT WINDS - 060 NM NORTHEAST QUADRANT
070 NM SOUTHEAST QUADRANT
065 NM SOUTHWEST QUADRANT
060 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 100 NM NORTHEAST QUADRANT
120 NM SOUTHEAST QUADRANT
115 NM SOUTHWEST QUADRANT
095 NM NORTHWEST QUADRANT
VECTOR TO 96 HR POSIT: 220 DEG/ 13 KTS
---
LONG RANGE OUTLOOK:
---
96 HRS, VALID AT:
131800Z --- 21.3S 72.5E
MAX SUSTAINED WINDS - 110 KT, GUSTS 135 KT
WIND RADII VALID OVER OPEN WATER ONLY
VECTOR TO 120 HR POSIT: 195 DEG/ 14 KTS
---
120 HRS, VALID AT:
141800Z --- 26.6S 70.9E
MAX SUSTAINED WINDS - 100 KT, GUSTS 125 KT
WIND RADII VALID OVER OPEN WATER ONLY
---
REMARKS:
092100Z POSITION NEAR 12.2S 85.7E.
TROPICAL CYCLONE (TC) 08S (EIGHT), LOCATED APPROXIMATELY 866 NM EAST-
SOUTHEAST OF DIEGO GARCIA, HAS TRACKED WEST-SOUTHWESTWARD AT
13 KNOTS OVER THE PAST SIX HOURS. ANIMATED INFRARED (IR) SATELLITE
IMAGERY DEPICTS CONSOLIDATING DEEP CONVECTION WITH SPIRAL BANDING
WRAPPING INTO A DEFINED LOW-LEVEL CIRCULATION CENTER (LLCC). A
091614Z METOP-A 89 GHZ MICROWAVE IMAGE REVEALS IMPROVED CONVECTIVE
BANDING OVER THE NORTHERN SEMI-CIRCLE WRAPPING INTO THE CENTER. A
091615Z ASCAT PASS SHOWS A WELL-DEFINED CIRCULATION WITH 35 TO 40
KNOT WINDS IN THE CORE, WHICH SUPPORTS THE INITIAL INTENSITY
ASSESSMENT. THE CURRENT POSITION IS BASED ON THE AFOREMENTIONED
MICROWAVE IMAGE AND A TIGHT GROUPING OF AGENCY POSITION FIXES WITH
HIGH CONFIDENCE. UPPER-LEVEL ANALYSIS INDICATES A FAVORABLE
ENVIRONMENT WITH MODERATE TO STRONG VERTICAL WIND SHEAR (VWS), WHICH
IS BEING OFFSET BY THE SYSTEM'S EASTERLY MOTION AND INCREASING
OUTFLOW. TC 08S IS CURRENTLY TRACKING WEST-SOUTHWESTWARD UNDER THE
STEERING INFLUENCE OF THE SUBTROPICAL RIDGE (STR) TO THE SOUTH. BY
TAU 24, THE WESTERN EXTENSION OF THE STR IS FORECAST TO WEAKEN,
ALLOWING TC 08S TO TURN SLIGHTLY SOUTHWESTWARD. MODEL GUIDANCE
INDICATES A MID-LATITUDE TROUGH WILL MOVE IN TO THE SOUTH OF THE
SYSTEM NEAR TAU 36, WHICH WILL ENHANCE POLEWARD OUTFLOW ALLOWING FOR
RAPID INTENSIFICATION. THE COMBINED EFFECTS OF FAVORABLE UPPER LEVEL
CONDITIONS AND WARM SEA SURFACE TEMPERATURE WILL FURTHER SUPPORT A
PEAK INTENSITY OF 110 KNOTS BY TAU 96. THE STR WILL REORIENT IN THE
LATER TAUS AS THE MID-LATITUDE TROUGH MOVES EASTWARD, CAUSING TC 08S
TO TRACK SOUTHWARD. DUE TO THE GOOD AGREEMENT IN THE MODEL TRACKERS,
THERE IS HIGH CONFIDENCE IN THE OFFICIAL FORECAST TRACK, WHICH IS
POSITIONED CLOSE TO CONSENSUS AND FAVORS GFS AND ECMWF SOLUTIONS.
MAXIMUM SIGNIFICANT WAVE HEIGHT AT 091800Z IS 10 FEET. NEXT WARNINGS
AT 100900Z AND 102100Z. THIS WARNING SUPERSEDES AND CANCELS REF A,
JOINT TYPHOON WRNCEN PEARL HARBOR HI 082151Z JAN 14 TROPICAL CYCLONE
FORMATION ALERT (WTXS21 PGTW 082200).//
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