WTPN31 PGTW 070300
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL DEPRESSION 15W (FIFTEEN) WARNING NR 005//
RMKS/
1. TROPICAL DEPRESSION 15W (FIFTEEN) WARNING NR 005    
   02 ACTIVE TROPICAL CYCLONES IN NORTHWESTPAC
   MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
   WIND RADII VALID OVER OPEN WATER ONLY
    ---
   WARNING POSITION:
   070000Z --- NEAR 33.0N 156.6E
     MOVEMENT PAST SIX HOURS - 355 DEGREES AT 20 KTS
     POSITION ACCURATE TO WITHIN 060 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: 33.0N 156.6E
    ---
   FORECASTS:
   12 HRS, VALID AT:
   071200Z --- 36.4N 156.9E
   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: 010 DEG/ 20 KTS
    ---
   24 HRS, VALID AT:
   080000Z --- 40.4N 157.8E
   MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT
   WIND RADII VALID OVER OPEN WATER ONLY
   DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
    ---
REMARKS:
070300Z POSITION NEAR 33.9N 156.7E.
07AUG25. TROPICAL DEPRESSION 15W (FIFTEEN), LOCATED APPROXIMATELY
849 NM EAST OF YOKOSUKA, JAPAN, HAS TRACKED NORTHWARD AT 20 KNOTS
OVER THE PAST SIX HOURS. ANIMATED MULTISPECTRAL SATELLITE IMAGERY
(MSI) DEPICTS 15W WITH A HIGHLY ELONGATED AND FULLY EXPOSED
LOW-LEVEL CIRCULATION CENTER (LLCC). A 062256Z METOP-C ASCAT IMAGE
REVEALED THAT THE WESTERN PORTION OF THE LLCC HAS BECOME VERY WEAK
AND OPENED UP. THE SYSTEM IS FORECAST TO CONTINUE TRACKING
NORTHWARD, ALONG THE WESTERN PERIPHERY OF A SUBTROPICAL RIDGE
POSITIONED TO THE EAST THROUGHOUT THE FORECAST PERIOD. ENVIRONMENTAL
ANALYSIS INDICATES THAT 15W IS IN AN UNFAVORABLE ENVIRONMENT
CHARACTERIZED BY WEAK OUTFLOW ALOFT, MODERATE (20 KTS) VERTICAL WIND
SHEAR, AND SIGNIFICANT DRY AIR ENTRAINMENT. 15W IS FORECAST TO FULLY
DISSIAPTE WITHIN THE NEXT 12 HOURS AS THE CIRCULATION BECOMES EVEN
MORE STRETCHED OUT. 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
070000Z IS 1005 MB. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 070000Z IS
12 FEET. REFER TO TROPICAL DEPRESSION 16W (SIXTEEN) WARNINGS
(WTPN32 PGTW) FOR SIX-HOURLY UPDATES.//
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