Advisories

WTPN31 PGTW 141500
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL DEPRESSION 16W (NANGKA) WARNING NR 009//
RMKS/
1. TROPICAL DEPRESSION 16W (NANGKA) WARNING NR 009    
   02 ACTIVE TROPICAL CYCLONES IN NORTHWESTPAC
   MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
   WIND RADII VALID OVER OPEN WATER ONLY
    ---
   WARNING POSITION:
   141200Z --- NEAR 28.3N 154.5E
     MOVEMENT PAST SIX HOURS - 100 DEGREES AT 07 KTS
     POSITION ACCURATE TO WITHIN 040 NM
     POSITION BASED ON CENTER LOCATED BY SATELLITE
   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: 28.3N 154.5E
    ---
   FORECASTS:
   12 HRS, VALID AT:
   150000Z --- 28.2N 156.2E
   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: 080 DEG/ 09 KTS
    ---
   24 HRS, VALID AT:
   151200Z --- 28.5N 158.2E
   MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
    ---
REMARKS:
141500Z POSITION NEAR 28.3N 154.9E.
14AUG26. TROPICAL DEPRESSION 16W (NANGKA), LOCATED APPROXIMATELY
247 NM NORTH OF MINAMI TORI SHIMA, HAS TRACKED EASTWARD AT 07
KNOTS OVER THE PAST SIX HOURS. ANIMATED SHORTWAVE INFRARED (SWIR) 
SATELLITE IMAGERY SHOWS A FULLY EXPOSED, INCREASINGLY ELONGATED, LOW 
LEVEL CIRCULATION CENTER (LLCC). EARLIER CONVECTIVE ACTIVITY IN THE 
NORTHEASTERN QUADRANT HAS FULLY DISSIPATED, AND THE STRUCTURE OF THE 
VORTEX IS NOW CONSTRICTED TO LOW- TO MID-LEVEL CLOUDS ONLY. THE SYSTEM 
IS TRACKING EASTWARD ALONG THE NORTHWESTERN FLANK OF A BELT OF RIDGING 
EXTENDING FROM A NEAR EQUATORIAL RIDGE (NER) TO THE SOUTHWEST AND AN 
EXTENSION OF A SUBTROPICAL RIDGE (STR) TO THE EAST. PERSISTENT STRONG 
WESTERLY SHEAR AND INCREASING DRY AIR ENTRAINMENT WILL HASTEN THE 
WEAKENING TREND, LEADING TO THE DISSIPATION OF THE SYSTEM WITHIN 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. MINIMUM CENTRAL PRESSURE AT 141200Z IS 999
MB. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 141200Z IS 10 FEET. REFER TO 
TROPICAL DEPRESSION 13W (PEILOU) FINAL WARNING (WTPN32 PGTW).//
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