ABPW10 PGTW 210200
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE WESTERN AND SOUTH 
PACIFIC OCEANS REISSUED/210200Z-210600ZDEC2021//
REF/A/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/201951ZDEC2021//
AMPN/REF A IS A TROPICAL CYCLONE FINAL WARNING.//
RMKS/
1. WESTERN NORTH PACIFIC AREA (180 TO MALAY PENINSULA):
   A. TROPICAL CYCLONE SUMMARY:
      (1) AT 20DEC21 1800Z, TROPICAL STORM 28W (RAI) WAS LOCATED 
NEAR 19.8N 113.0E, APPROXIMATELY 164 NM SOUTH-SOUTHWEST OF HONG 
KONG, AND HAD TRACKED NORTHEASTWARD AT 11 KNOTS OVER THE PAST SIX 
HOURS. MAXIMUM SUSTAINED SURFACE WINDS WERE ESTIMATED AT 40 KNOTS 
GUSTING TO 50 KNOTS. SEE REF A (WTPN31 PGTW 202100) FOR THE FINAL 
WARNING ON THIS SYSTEM.
      (2) NO OTHER TROPICAL CYCLONES.
   B. TROPICAL DISTURBANCE SUMMARY:
      (1) AN AREA OF CONVECTION (INVEST 98W) HAS PERSISTED NEAR 6.4N 
140.7E, APPROXIMATELY 285 NM SOUTHEAST OF YAP. ANIMATED 
MULTISPECTRAL SATELLITE IMAGERY (MSI) AND A 202057Z SSMIS 91GHZ 
MICROWAVE IMAGE DEPICT FLARING CONVECTION OVER A BROAD AREA OF 
CIRCULATION. ENVIRONMENTAL ANALYSIS DEPICTS GENERALLY FAVORABLE 
CONDITIONS FOR DEVELOPMENT WITH ROBUST EQUATORWARD OUTFLOW, LOW (5-
10 KTS) VERTICAL WIND SHEAR (VWS), AND WARM (30-31C) SEA SURFACE 
TEMPERATURES. GLOBAL MODELS INDICATE THAT 98W WILL TRACK WEST-
NORTHWESTWARD, AND ARE SPLIT ON DEVELOPMENT, WITH THE GFS SHOWING 
SOME CONSOLIDATION AND DEEPENING. MAXIMUM SUSTAINED SURFACE WINDS 
ARE ESTIMATED AT 18 TO 23 KNOTS. MINIMUM SEA LEVEL PRESSURE IS 
ESTIMATED TO BE NEAR 1007 MB. THE POTENTIAL FOR THE DEVELOPMENT OF A 
SIGNIFICANT TROPICAL CYCLONE WITHIN THE NEXT 24 HOURS IS UPGRADED TO 
LOW.
      (2) NO OTHER SUSPECT AREAS.
   C. SUBTROPICAL SYSTEM SUMMARY: NONE.
2. SOUTH PACIFIC AREA (WEST COAST OF SOUTH AMERICA TO 135 EAST):
   A. TROPICAL CYCLONE SUMMARY: NONE.
   B. TROPICAL DISTURBANCE SUMMARY: NONE.
   C. SUBTROPICAL SYSTEM SUMMARY: NONE.
3. JUSTIFICATION FOR REISSUE: ADDED AREA IN PARA 1.B.(1) AS A LOW.//
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