ABPW10 PGTW 170600
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE WESTERN AND
/SOUTH PACIFIC OCEANS/170600Z-180600ZFEB2021//
REF/A/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/170051ZFEB2021//
AMPN/REF A IS A TROPICAL CYCLONE FORMATION ALERT//
RMKS/
1. WESTERN NORTH PACIFIC AREA (180 TO MALAY PENINSULA):
   A. TROPICAL CYCLONE SUMMARY: NONE.
   B. TROPICAL DISTURBANCE SUMMARY:
      (1) THE AREA OF CONVECTION (INVEST 91W) PREVIOUSLY LOCATED 
NEAR 7.4N 134.7E IS NOW LOCATED NEAR 6.6N 134.3E, APPROXIMATELY 55 NM 
SOUTH-SOUTHWEST OF KOROR, REPUBLIC OF PALAU. ANIMATED MULTISPECTRAL 
SATELLITE IMAGERY (MSI) DEPICTS FORMATIVE CONVECTIVE BANDING WRAPPING 
INTO AN OBSCURED LOW LEVEL CIRCULATION CENTER (LLCC). A 170056Z METOP-B 
89GHZ SATELLITE IMAGE REVEALS AN AREA OF DEEP CONVECTION CENTERED OVER 
THE LLCC. INVEST 91W IS IN A FAVORABLE ENVIRONMENT FOR DEVELOPMENT WITH 
LOW TO MODERATE (10-20 KT) RELATIVE VERTICAL WIND SHEAR, GOOD POLEWARD 
AND WESTWARD OUTFLOW, AND WARM (29-30C)SEA SURFACE TEMPERATURES. GLOBAL 
MODELS ARE IN GOOD AGREEMENT THAT 91W WILL STRENGTHEN AND CONSOLIDATE 
AS IT TRACKS WEST-NORTHWESTWARD. MAXIMUM SUSTAINED SURFACE WINDS ARE 
ESTIMATED AT 18 TO 23 KNOTS. MINIMUM SEA LEVEL PRESSURE IS ESTIMATED TO 
BE NEAR 1004 MB. THE POTENTIAL FOR THE DEVELOPMENT OF A SIGNIFICANT 
TROPICAL CYCLONE WITHIN THE NEXT 24 HOURS REMAINS HIGH. SEE REF A 
(WTPN21 PGTW 161400) FOR FURTHER DETAILS.
      (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.//
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