Tropical Storm NAMTHEUN Advisory ma, 05-09

MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL CYCLONE WARNING//
RMKS/
1. TROPICAL DEPRESSION 15W (NAMTHEUN) WARNING NR 019
   DOWNGRADED FROM TROPICAL STORM 15W
   01 ACTIVE TROPICAL CYCLONE IN NORTHWESTPAC
   MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
   WIND RADII VALID OVER OPEN WATER ONLY
    ---
   WARNING POSITION:
   050000Z --- NEAR 34.0N 130.4E
     MOVEMENT PAST SIX HOURS - 030 DEGREES AT 10 KTS
     POSITION ACCURATE TO WITHIN 020 NM
     POSITION BASED ON CENTER LOCATED BY A COMBINATION OF
     SATELLITE, RADAR AND EXTRAPOLATION
   PRESENT WIND DISTRIBUTION:
   MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
   REPEAT POSIT: 34.0N 130.4E
    ---
   FORECASTS:
   12 HRS, VALID AT:
   051200Z --- 36.5N 132.7E
   MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
   VECTOR TO 24 HR POSIT: 035 DEG/ 22 KTS
    ---
   24 HRS, VALID AT:
   060000Z --- 40.1N 136.1E
   MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
    ---
REMARKS:
050300Z POSITION NEAR 34.6N 131.0E.
TROPICAL DEPRESSION 15W (NAMTHEUN), LOCATED APPROXIMATELY 64 NM
NORTH-NORTHEAST OF SASEBO, JAPAN, HAS TRACKED NORTH-NORTHEASTWARD
AT 10 KNOTS OVER THE PAST SIX HOURS. ANIMATED SATELLITE AND RADAR
IMAGERY SHOW THE CENTRAL CONVECTION HAS DISPERSED AND WEAKENED
SIGNIFICANTLY. THE LOW LEVEL CIRCULATION HAS UNRAVELED AS IT DRAGGED
ACROSS NORTHERN KYUSHU AND OFF THE COAST INTO THE SEA OF JAPAN AND
HAS BECOME DIFFICULT TO PINPOINT. THE INITIAL POSITION AND INTENSITY
ARE EXTRAPOLATED FROM SURFACE OBSERVATIONS WITH LOW CONFIDENCE.
ENVIRONMENTAL ANALYSIS INDICATES TD 15W HAS MOVED INTO VERY STRONG
VERTICAL WIND SHEAR (GREATER THAN 30 KNOTS) AND COLD SSTS (LESS THAN
25C) AND IS EXPECTED TO TOTALLY DISSIPATE OVER THE NEXT 12 HOURS.
THIS IS THE FINAL WARNING ON THIS SYSTEM BY THE JOINT TYPHOON
WRNCEN PEARL HARBOR HI. THE SYSTEM WILL BE CLOSELY MONITORED FOR
SIGNS OF REGENERATION. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 050000Z
IS 8 FEET.//
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