SUBJ: TROPICAL CYCLONE WARNING
WTPN31 PGTW 010300    
1. TROPICAL DEPRESSION 04W WARNING NR 006 RELOCATED
   01 ACTIVE TROPICAL CYCLONE IN NORTHWESTPAC
   MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
    ---
   WARNING POSITION:
   010000Z1 --- NEAR 16.1N8 108.8E7
     MOVEMENT PAST SIX HOURS - 325 DEGREES AT 08 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
   DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
   REPEAT POSIT: 16.1N8 108.8E7
    ---
   FORECASTS:
   12 HRS, VALID AT:
   011200Z4 --- 17.7N5 107.3E1
   MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT
   DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
   VECTOR TO 24 HR POSIT: 320 DEG/ 11 KTS
    ---
   24 HRS, VALID AT:
   020000Z2 --- 19.3N3 105.8E4
   MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT
   DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
    ---
REMARKS:
010300Z4 POSITION NEAR 16.5N2 108.4E3.
RECENT VISIBLE SATELLITE IMAGERY REVEALS THAT TD 04W IS A PARTIALLY
EXPOSED LOW-LEVEL CIRCULATION CENTER (LLCC) SHEARED TO THE NORTH OF
THE CONVECTION. EARLIER INFRARED IMAGERY AND QUIKSCAT DATA INDICATED
TD 04W WAS FURTHER TO THE SOUTHEAST. BASED ON THE VISIBLE IMAGERY, 
WE RELOCATED THE POSITION ABOUT 60 NM TO THE NORTH OF THE PREVIOUS
WARNING POSITION. TROPICAL DEPRESSION (TD) 04W, LOCATED 
APPROXIMATELY 32 NM EAST OF DA NANG, 
VIETNAM
, HAS TRACKED 
NORTHWESTWARD AT 08 KNOTS OVER THE PAST 6 HOURS. THE WARNING 
POSITION IS BASED ON 312330Z2 INFRARED AND VISIBLE SATELLITE 
IMAGERY. THE WARNING INTENSITY IS BASED ON SATELLITE CURRENT 
INTENSITY ESTIMATES OF 25 KNOTS. ANIMATED VISIBLE SATELLITE IMAGERY 
AND A 312138Z8 TROPICAL RAINFALL MEASURING MISSION (TRMM) PASS 
DEPICT A PARTIALLY EXPOSED LOW-LEVEL CIRCULATION CENTER (LLCC) WITH 
ASSOCIATED CONVECTION DISPLACED ABOUT 10 NM TO THE SOUTH. 
CONVERGENCE ALOFT ASSOCIATED WITH AN UPPER-LEVEL LOW POSITIONED NEAR 
LUZON AND LAND INTERACTION ALONG THE 
VIETNAM
 COAST HAS WEAKENED THE 
SYSTEM CONSIDERABLY. LOW/MID LEVEL HIGH, SITUATED OVER 
OKINAWA
 WITH
ASSOCIATED RIDGE EXTENDING WEST-SOUTHWESTWARD OVER THE GULF OF 
TONKIN, IS EXPECTED TO WEAKEN AND SHIFT NORTH OVER THE 
TAIWAN
 STRAIT 
DURING THE NEXT 24 HOURS. THEREFORE, TD 04W SHOULD TRACK 
NORTHWESTWARD ALONG THE COAST THROUGH THE PERIOD. TD 04W IS FORECAST 
TO WEAKEN AND DISSIPATE BY THE END OF THE PERIOD. MAXIMUM 
SIGNIFICANT WAVE HEIGHT AT 010000Z1 IS 12 FEET. REFER TO WWPW30 RJTX  
FOR ADDITIONAL SEA HEIGHT INFORMATION. NEXT WARNINGS AT 010900Z0 
(DTG 010751Z4), 011500Z7 (DTG 011351Z1) AND 012100Z4 (DTG 
011951Z7).//



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