WTPN31 PGTW 032100
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL DEPRESSION 17W (SEVENTEEN) WARNING NR 008//
RMKS/
1. TROPICAL DEPRESSION 17W (SEVENTEEN) WARNING NR 008
01 ACTIVE TROPICAL CYCLONE IN NORTHWESTPAC
MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
WIND RADII VALID OVER OPEN WATER ONLY
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WARNING POSITION:
031800Z --- NEAR 32.9N 159.6E
MOVEMENT PAST SIX HOURS - 040 DEGREES AT 18 KTS
POSITION ACCURATE TO WITHIN 015 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: 32.9N 159.6E
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FORECASTS:
12 HRS, VALID AT:
040600Z --- 36.0N 162.4E
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: 050 DEG/ 23 KTS
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24 HRS, VALID AT:
041800Z --- 39.0N 166.8E
MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT
WIND RADII VALID OVER OPEN WATER ONLY
DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
---
REMARKS:
032100Z POSITION NEAR 33.7N 160.3E.
03SEP21. TROPICAL DEPRESSION 17W (SEVENTEEN), LOCATED APPROXIMATELY
997 NM EAST OF YOKOSUKA, JAPAN, HAS TRACKED NORTHEAST-WARD AT 18
KNOTS OVER THE PAST SIX HOURS. ANIMATED ENHANCED INFRARED (EIR)
SATELLITE IMAGERY SHOWS A WEAK AND IRREGULAR SYSTEM WITH THE MAIN
CONVECTION SHEARED 50NM+ FROM A PARTLY EXPOSED LOW LEVEL CIRCULATION
(LLC). THE INITIAL POSITION IS PLACED WITH HIGH CONFIDENCE BASED ON
THE LLC FEATURE IN THE EIR LOOP. THE INITIAL INTENSITY IS BASED ON
THE PGTW DVORAK ESTIMATE OF T1.5/25 KTS AND REFLECTS THE 6-HR
DETERIORATION. TD 17W HAS DRIFTED INTO HIGH (25KTS+) VERTICAL WIND
SHEAR AND COOLER (26C) SEA SURFACE TEMPERATURES AS IT ACCELERATED
NORTHEASTWARD ON THE POLEWARD SIDE OF THE STEERING SUBTROPICAL RIDGE
TO THE SOUTHEAST. IT IS EXPECTED TO DISSIPATE BY TAU 12 AS THE
UNFAVORABLE ENVIRONMENTAL CONDITIONS WORSEN. 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 031800Z IS 11 FEET.//
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