
WTXS31 PGTW 132100
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL CYCLONE 08S (COLIN) WARNING NR 009//
RMKS/
1. TROPICAL CYCLONE 08S (COLIN) WARNING NR 009    
   01 ACTIVE TROPICAL CYCLONE IN SOUTHIO
   MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
   WIND RADII VALID OVER OPEN WATER ONLY
    ---
   WARNING POSITION:
   131800Z --- NEAR 24.9S 73.6E
     MOVEMENT PAST SIX HOURS - 205 DEGREES AT 11 KTS
     POSITION ACCURATE TO WITHIN 050 NM
     POSITION BASED ON CENTER LOCATED BY SATELLITE
   PRESENT WIND DISTRIBUTION:
   MAX SUSTAINED WINDS - 060 KT, GUSTS 075 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   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 - 085 NM NORTHEAST QUADRANT
                            095 NM SOUTHEAST QUADRANT
                            090 NM SOUTHWEST QUADRANT
                            080 NM NORTHWEST QUADRANT
   REPEAT POSIT: 24.9S 73.6E
    ---
   FORECASTS:
   12 HRS, VALID AT:
   140600Z --- 26.6S 73.0E
   MAX SUSTAINED WINDS - 050 KT, GUSTS 065 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   RADIUS OF 034 KT WINDS - 105 NM NORTHEAST QUADRANT
                            115 NM SOUTHEAST QUADRANT
                            110 NM SOUTHWEST QUADRANT
                            100 NM NORTHWEST QUADRANT
   VECTOR TO 24 HR POSIT: 175 DEG/ 09 KTS
    ---
   24 HRS, VALID AT:
   141800Z --- 28.3S 73.2E
   MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   BECOMING EXTRATROPICAL
   RADIUS OF 034 KT WINDS - 100 NM NORTHEAST QUADRANT
                            110 NM SOUTHEAST QUADRANT
                            105 NM SOUTHWEST QUADRANT
                            095 NM NORTHWEST QUADRANT
   VECTOR TO 36 HR POSIT: 140 DEG/ 17 KTS
    ---
   36 HRS, VALID AT:
   150600Z --- 30.8S 75.7E
   MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   BECOMING EXTRATROPICAL
   RADIUS OF 034 KT WINDS - 095 NM NORTHEAST QUADRANT
                            095 NM SOUTHEAST QUADRANT
                            100 NM SOUTHWEST QUADRANT
                            090 NM NORTHWEST QUADRANT
   VECTOR TO 48 HR POSIT: 125 DEG/ 22 KTS
    ---
   EXTENDED OUTLOOK:
   48 HRS, VALID AT:
   151800Z --- 33.3S 80.0E
   MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   EXTRATROPICAL
    ---
REMARKS:
132100Z POSITION NEAR 25.3S 73.5E.
TROPICAL CYCLONE (TC) 08S (COLIN), LOCATED APPROXIMATELY 1065 NM 
SOUTH OF DIEGO GARCIA, HAS TRACKED SOUTH-SOUTHWESTWARD AT 11 KNOTS 
OVER THE PAST SIX HOURS. RECENT ANIMATED MULTISPECTRAL SATELLITE 
IMAGERY (MSI) DEPICTS A FULLY-EXPOSED LOW-LEVEL CIRCULATION CENTER 
(LLCC) WITH DIMINISHED CONVECTIVE BANDING AS TC 08S CONTINUES ITS 
WEAKENING TREND. A 131629Z METOP-A 89 GHZ MICROWAVE IMAGE REVEALS 
AN EXPOSED LLCC WITH LIMITED DEEP CONVECTION DISPLACED OVER THE 
SOUTHERN SEMI-CIRCLE. THE CURRENT POSITION IS BASED ON THE MSI WITH 
HIGH CONFIDENCE. THE INITIAL INTENSITY IS BASED ON THE CURRENT 
INTENSITY DVORAK ESTIMATES FROM PGTW AND KNES. UPPER-LEVEL ANALYSIS 
INDICATES TC 08S CONTINUES TO TRACK AROUND A DEEP-LAYERED 
SUBTROPICAL RIDGE (STR) TO THE EAST. BY TAU 24, A TRANSITORY MID-
LATITUDE TROUGH WILL PASS TO THE SOUTH OF THE SYSTEM, ALLOWING TC 
08S TO RECURVE AND TRACK SOUTHEASTWARD AS IT BEGINS TO INTERACT WITH 
THE MIDLATITUDE WESTERLY FLOW. THE COMBINED EFFECTS OF DECREASING 
SEA SURFACE TEMPERATURES AND INCREASING VERTICAL WIND SHEAR WILL 
FURTHER DETERIORATE THE SYSTEM AS IT UNDERGOES EXTRATROPICAL 
TRANSITION (ETT). TC 08S IS FORECAST TO COMPLETE ETT BY TAU 48. DUE 
TO THE TIGHT AGREEMENT AMONG THE MODEL TRACKERS, THERE IS HIGH 
CONFIDENCE TO THE JTWC FORECAST TRACK. MAXIMUM SIGNIFICANT WAVE 
HEIGHT AT 131800Z IS 20 FEET. NEXT WARNINGS AT 140900Z AND 142100Z.//
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