** WTIO31 PGTW 201500 ***
MSGID/GENADMIN/NAVPACMETOCCEN PEARL HARBOR HI/JTWC//
SUBJ/TROPICAL CYCLONE WARNING//
RMKS/
1. TROPICAL CYCLONE 07B WARNING NR 009
   01 ACTIVE TROPICAL CYCLONE IN NORTHIO
   MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
    ---
   WARNING POSITION:
   201200Z --- NEAR 11.8N 84.4E
     MOVEMENT PAST SIX HOURS - 010 DEGREES AT 05 KTS
     POSITION ACCURATE TO WITHIN 060 NM
     POSITION BASED ON CENTER LOCATED BY SATELLITE
   PRESENT WIND DISTRIBUTION:
   MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT
   RADIUS OF 034 KT WINDS - 050 NM NORTHEAST QUADRANT
                            040 NM SOUTHEAST QUADRANT
                            040 NM SOUTHWEST QUADRANT
                            050 NM NORTHWEST QUADRANT
   REPEAT POSIT: 11.8N 84.4E
    ---
   FORECASTS:
   12 HRS, VALID AT:
   210000Z --- 12.6N 84.4E
   MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT
   RADIUS OF 034 KT WINDS - 040 NM NORTHEAST QUADRANT
                            035 NM SOUTHEAST QUADRANT
                            030 NM SOUTHWEST QUADRANT
                            040 NM NORTHWEST QUADRANT
   VECTOR TO 24 HR POSIT: 345 DEG/ 05 KTS
    ---
   24 HRS, VALID AT:
   211200Z --- 13.6N 84.1E
   MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT
   VECTOR TO 36 HR POSIT: 015 DEG/ 07 KTS
    ---
   36 HRS, VALID AT:
   220000Z --- 15.0N 84.5E
   MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT
   BECOMING EXTRATROPICAL
   VECTOR TO 48 HR POSIT: 035 DEG/ 11 KTS
    ---
   EXTENDED OUTLOOK:
   48 HRS, VALID AT:
   221200Z --- 16.8N 85.7E
   MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
   EXTRATROPICAL
    ---
REMARKS:
201500Z POSITION NEAR 12.0N 84.4E.
TROPICAL CYCLONE (TC) 07B, LOCATED APPROXIMATELY 250 NM EAST-
SOUTHEAST OF MADRAS, INDIA, HAS TRACKED NORTHWARD AT 05 KNOTS
OVER THE PAST SIX HOURS. CONVECTION CONTINUES TO CYCLE NEAR
A PARTIALLY EXPOSED LOW LEVEL CIRCULATION CENTER IN AN
ENVIRONMENT OF MODERATE VERTICAL WIND SHEAR. AN APPROACHING
MIDLATITUDE TROUGH HAS WEAKENED THE STEERING RIDGE TO THE
WEST, ALLOWING THE SUBTROPICAL RIDGE TO THE EAST TO DOMINATE.
THE APPROACHING MIDLATITUDE TROUGH WILL CONTINUE TO DEEPEN
AND TRANSLATE EASTWARD WHICH WILL RESULT IN A NORTHEASTERN
ACCELERATION FOR TC 07B AS IT BEGINS EXTRATROPICAL TRANSITION.
PAST TAU 36. THE SYSTEM WILL BE FULLY EXTRATROPICAL BY TAU 48.
MAXIMUM SIGNIFICANT WAVE HEIGHT AT 201200Z IS 17 FEET. NEXT
WARNINGS AT 210300Z AND 211500Z.//