WTPQ32 RJTD 190600
RSMC TROPICAL CYCLONE PROGNOSTIC REASONING
REASONING NO.42 FOR TS 2424 MAN-YI (2424)
1.GENERAL COMMENTS
  TS MAN-YI IS LOCATED AT 18.6N, 113.6E. INFORMATION ON THE CURRENT
  POSITION IS BASED ON ANIMATED MSI AND SURFACE OBSERVATIONS.
  POSITIONAL ACCURACY IS FAIR. CENTRAL PRESSURE IS 998HPA AND
  MAXIMUM SUSTAINED WINDS NEAR THE CENTER ARE 45KNOTS. THE SYSTEM IS
  IN AN UNFAVORABLE ENVIRONMENT FOR DEVELOPMENT UNDER THE INFLUENCE
  OF REDUCED TCHP AND STRONG VWS. THIS HAS CAUSED THE SYSTEM TO
  WEAKEN OVER THE LAST SIX HOURS. INFORMATION ON THE CURRENT
  INTENSITY IS BASED ON DVORAK INTENSITY ANALYSES AND SURFACE
  OBSERVATIONS.
2.SYNOPTIC SITUATION
  THE SYSTEM IS MOVING WESTWARD ALONG THE SOUTHERN PERIPHERY OF A
  MID-LEVEL SUB-TROPICAL HIGH. ANIMATED MSI SHOWS THE SYSTEM IS ONLY
  A VORTEX CONSISTING OF LOW-LEVEL CLOUDS. WATER VAPOR IMAGERY SHOWS
  DRY AIR IN THE DIRECTION OF THE MOVEMENT.
3.TRACK FORECAST
  THE SYSTEM WILL MOVE WEST-SOUTHWESTWARD ALONG THE PERIPHERY OF A
  MID-LEVEL SUB-TROPICAL HIGH UNTIL FT12. THE SYSTEM WILL THEN MOVE
  SOUTHWESTWARD UNDER THE INFLUENCE OF LOW-LEVEL FLOW UNTIL FT24.
  THE TRACK FORECAST IS BASED ON GSM PREDICTIONS, AND REFERENCE TO
  OTHER NWP MODELS. TRACK FORECAST CONFIDENCE IS LOW DUE TO
  SIGNIFICANT DIFFERENCES AMONG NWP MODEL OUTPUTS.
4.INTENSITY FORECAST
  THE SYSTEM WILL WEAKEN UNTIL FT24 DUE TO THE INFLUENCE OF
  INTERACTION WITH LOW TCHP AND STRONG VWS. THE SYSTEM WILL WEAKEN
  TO TD INTENSITY BY FT24. THE INTENSITY FORECAST IS BASED ON A
  CONSENSUS OF GUIDANCE DATA INCLUDING GSM.
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