WTPN31 PGTW 280900                                              2004241 0903
MSGID/GENADMIN/NAVPACMETOCCEN PEARL HARBOR HI/JTWC//
SUBJ/TROPICAL CYCLONE WARNING//
RMKS/
1. TROPICAL DEPRESSION 21W WARNING NR 009
   03 ACTIVE TROPICAL CYCLONES IN NORTHWESTPAC
   MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
    ---
   WARNING POSITION:
   280600Z6 --- NEAR 16.1N8 145.6E6
     MOVEMENT PAST SIX HOURS - 270 DEGREES AT 08 KTS
     POSITION ACCURATE TO WITHIN 060 NM
     POSITION BASED ON CENTER LOCATED BY SATELLITE
   PRESENT WIND DISTRIBUTION:
   MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT
   DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
   REPEAT POSIT: 16.1N8 145.6E6
    ---
   FORECASTS:
   12 HRS, VALID AT:
   281800Z9 --- 16.4N1 144.1E0
   MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT
   DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
    ---
REMARKS:
280900Z9 POSITION NEAR 16.2N9 145.2E2.
TROPICAL DEPRESSION (TD) 21W, LOCATED APPROXIMATELY 60 NM NORTH
OF SAIPAN, HAS TRACKED WESTWARD AT 08 KNOTS OVER THE PAST 06 HOURS.
THE WARNING POSITION IS BASED ON 280530Z8 MULTISPECTRAL SATELLITE
IMAGERY. THE WARNING INTENSITY IS BASED ON SATELLITE CURRENT INTENSITY
ESTIMATES OF 25 KNOTS. CURRENT ANIMATED AND RECENT MICROWAVE IMAGERY
SHOW THE WEAK LOW LEVEL CIRCULATION CENTER FULLY EXPOSED OVER 60 NM
FROM THE NEAREST DEEP CONVECTION. TD 21W IS CURRENTLY UNDER SIGNIFICANT
VERTICAL WIND SHEAR AND OUTFLOW IS BEING HAMPERED BY A DEVELOPING UPPER
LEVEL LOW RIGHT OVER THE SYSTEM. THE VERTICAL WIND SHEAR CONDITIONS ARE
NOT FORECAST TO IMPROVE. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 280600Z6 IS
08 FEET. REFER TO WWPW30 RJTX FOR ADDITIONAL SEA HEIGHT INFORMATION.
THIS IS THE FINAL TROPICAL CYCLONE WARNING ON THIS SYSTEM BY THE JOINT
TYPHOON WARNING CENTER (NAVPACMETOCCEN). THE SYSTEM WILL BE CLOSELY
MONITORED FOR SIGNS OF REGENERATION. REFER TO TYPHOON 19W  (CHABA)
WARNINGS (WTPN32 PGTW) FOR SIX-HOURLY UPDATES. REFER TO  TROPICAL STORM
22W (SONGDA) WARNINGS (WTPN33 PGTW) FOR SIX-HOURLY UPDATES.//
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