ABIO10 PGTW 291800
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE INDIAN
/OCEAN/291800Z-301800ZMAY2022//
RMKS/
1. NORTH INDIAN OCEAN AREA (MALAY PENINSULA WEST TO COAST OF AFRICA):
   A. TROPICAL CYCLONE SUMMARY: NONE.
   B. TROPICAL DISTURBANCE SUMMARY: NONE.
   C. SUBTROPICAL SYSTEM SUMMARY: NONE.
2. SOUTH INDIAN OCEAN AREA (135E WEST TO COAST OF AFRICA):
   A. TROPICAL CYCLONE SUMMARY: NONE.
   B. TROPICAL DISTURBANCE SUMMARY: NONE.
   C. SUBTROPICAL SYSTEM SUMMARY:
      (1) AN AREA OF CONVECTION (INVEST 92S) HAS PERSISTED NEAR 
16.9S 111.3E, APPROXIMATELY 356 NM NORTH-NORTHWEST OF LEARMONTH, 
AUSTRALIA. THE SYSTEM IS CURRENTLY CLASSIFIED AS A SUBTROPICAL 
STORM, GENERALLY CHARACTERIZED AS HAVING BOTH TROPICAL AND MID-
LATITUDE FEATURES. THE SYSTEM IS LOCATED POLEWARD OF THE SUBTROPICAL 
RIDGE, UNDER STRONG NORTHWESTERLY UPPER-LEVEL FLOW WITH A 
SUBTROPICAL JET TO THE SOUTH, AND IS INTERACTING WITH A MODERATE 
BAROCLINIC ZONE. ANIMATED ENHANCED INFRARED SATELLITE IMAGERY 
DEPICTS A BROAD, DISORGANIZED SYSTEM WITH DEEP CONVECTION SHEARED TO 
THE EAST DUE TO MODERATE TO STRONG NORTHWESTERLY VERTICAL WIND 
SHEAR. A 291620Z GMI 89GHZ COLOR COMPOSITE MICROWAVE IMAGE REVEALS 
SHALLOW BANDING WRAPPING INTO A BROAD, WEAKLY-DEFINED LOW-LEVEL 
CIRCULATION WITH THE BULK OF THE DEEP CONVECTION DISPLACED EAST. A 
291434Z ASCAT-B IMAGE SHOWS A HIGHLY ASYMMETRIC WIND FIELD WITH 30-
35 KNOT WINDS OVER THE EASTERN AND SOUTHERN PERIPHERIES. GLOBAL 
MODELS INDICATE THIS SUBTROPICAL SYSTEM WILL SLOWLY TRACK 
SOUTHEASTWARD OVER NORTHWEST AUSTRALIA OVER THE NEXT TWO DAYS WITH 
GRADUAL WEAKENING. MAXIMUM SUSTAINED SURFACE WINDS ARE ESTIMATED AT 
30 TO 35 KNOTS. MINIMUM SEA LEVEL PRESSURE IS ESTIMATED TO BE NEAR 
1004 MB. FOR HAZARDS AND WARNINGS, REFERENCE THE FLEET WEATHER 
CENTER SAN DIEGO HIGH WINDS AND SEAS PRODUCT OR REFER TO LOCAL WMO 
DESIGNATED FORECAST AUTHORITY. THE POTENTIAL FOR THE SYSTEM TO 
TRANSITION INTO A SIGNIFICANT TROPICAL CYCLONE WITHIN THE NEXT 24 
HOURS IS LOW.
      (2) NO OTHER SUBTROPICAL SYSTEMS.//
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