WTPN31 PGTW 130900    
1. TROPICAL DEPRESSION 28W WARNING NR 027    
   DOWNGRADED FROM TROPICAL STORM 28W
   01 ACTIVE TROPICAL CYCLONE IN NORTHWESTPAC
   MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
    ---
   WARNING POSITION:
   130600Z0 --- NEAR 17.7N5 110.8E0
     MOVEMENT PAST SIX HOURS - 275 DEGREES AT 13 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: 17.7N5 110.8E0
    ---
   FORECASTS:
   12 HRS, VALID AT:
   131800Z3 --- 17.7N5 109.4E4
   MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT
   DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
   VECTOR TO 24 HR POSIT: 270 DEG/ 07 KTS
    ---
   24 HRS, VALID AT:
   140600Z1 --- 17.7N5 107.9E7
   MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT
   DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
    ---
REMARKS:
130900Z3 POSITION NEAR 17.7N5  110.4E6.
TROPICAL DEPRESSION (TD) 28W, LOCATED APPROXIMATELY 176 NM EAST-
NORTHEAST OF DA NANG, VIETNAM, HAS TRACKED WEST AT 13 KNOTS 
OVER THE PAST 6 HOURS. THE WARNING POSITION IS BASED UPON 130530Z2 
ANIMATED VISIBLE AND INFRARED SATELLITE IMAGERY AND SYNOPTIC DATA. 
THE WARNING INTENSITY IS BASED UPON SATELLITE CURRENT INTENSITY
ESTIMATES OF 35 KNOTS AND SYNOPTIC DATA OF 10 TO 15 KNOTS. ANIMATED
SATELLITE IMAGERY INDICATES A DECREASE IN INTENSITY OF THE 
UNORGANIZED CONVECTION. THE LOW LEVEL CIRCULATION CENTER (LLCC) IS 
DIFFICULT TO FIND IN SATELLITE IMAGERY. SATELLITE IMAGERY ALSO 
SUGGEST A POSSIBLE SECONDARY LLCC CENTERED NEAR 15.3N9 110.9E1. THIS 
SECONDARY CIRCULATION HAS WEAK CONVECTION ASSOCIATED WITH IT. TD 28W 
IS FORECAST TO TRACK WESTWARD THROUGH THE PERIOD, UNDER THE STEERING 
INFLUENCE OF THE SUBTROPICAL RIDGE TO THE NORTH. THE SYSTEM IS 
FORECAST TO DISSIPATE BY THE 24 HOUR PERIOD. MAXIMUM SIGNIFICANT 
WAVE HEIGHT AT 130600Z0 IS 10 FEET. REFER TO WWPW30 RJTX FOR 
ADDITIONAL SEA HEIGHT INFORMATION. THIS IS THE FINAL WARNING ON THIS 
SYSTEM BY THE JOINT TYPHOON WARNING CENTER (NAVPACMETOCCEN). THE 
SYSTEM WILL BE CLOSELY MONITORED FOR SIGNS OF REGENERATION.//


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