WTPN31 PGTW 152100

MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//

SUBJ/TROPICAL CYCLONE WARNING//

RMKS/

1. TROPICAL STORM 09W (CHANTHU) WARNING NR 011

   01 ACTIVE TROPICAL CYCLONE IN NORTHWESTPAC

   MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE

   WIND RADII VALID OVER OPEN WATER ONLY

    ---

   WARNING POSITION:

   151800Z --- NEAR 30.3N 143.0E

     MOVEMENT PAST SIX HOURS - 335 DEGREES AT 13 KTS

     POSITION ACCURATE TO WITHIN 040 NM

     POSITION BASED ON CENTER LOCATED BY SATELLITE

   PRESENT WIND DISTRIBUTION:

   MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT

   WIND RADII VALID OVER OPEN WATER ONLY

   REPEAT POSIT: 30.3N 143.0E

    ---

   FORECASTS:

   12 HRS, VALID AT:

   160600Z --- 32.6N 141.7E

   MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT

   WIND RADII VALID OVER OPEN WATER ONLY

   BECOMING EXTRATROPICAL

   VECTOR TO 24 HR POSIT: 350 DEG/ 14 KTS

    ---

   24 HRS, VALID AT:

   161800Z --- 35.4N 141.2E

   MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT

   WIND RADII VALID OVER OPEN WATER ONLY

   BECOMING EXTRATROPICAL

   VECTOR TO 36 HR POSIT: 010 DEG/ 22 KTS

    ---

   36 HRS, VALID AT:

   170600Z --- 39.7N 142.1E

   MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT

   WIND RADII VALID OVER OPEN WATER ONLY

   EXTRATROPICAL

   VECTOR TO 48 HR POSIT: 015 DEG/ 27 KTS

    ---

   EXTENDED OUTLOOK:

   48 HRS, VALID AT:

   171800Z --- 44.9N 143.8E

   MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT

   WIND RADII VALID OVER OPEN WATER ONLY

   EXTRATROPICAL

    ---

REMARKS:

152100Z POSITION NEAR 30.9N 142.7E.

TROPICAL STORM 09W (CHANTHU), LOCATED APPROXIMATELY 343 NM SOUTH-

SOUTHEAST OF YOKOSUKA, JAPAN, HAS TRACKED NORTH-NORTHWESTWARD AT

13 KNOTS OVER THE PAST SIX HOURS.

MAXIMUM SIGNIFICANT WAVE HEIGHT AT 151800Z IS 13 FEET. NEXT

WARNINGS AT 160300Z, 160900Z, 161500Z AND 162100Z.

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