ABIO10 PGTW 061800
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/SIGNIFICANT TROPICAL WEATHER ADVISORY FOR THE INDIAN 
OCEAN/061800Z-071800ZJAN2026//
REF/A/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/060751ZJAN2026//
AMPN/REF A IS A TROPICAL CYCLONE WARNING.//
RMKS/
1. NORTH INDIAN OCEAN AREA (MALAY PENINSULA WEST TO COAST OF AFRICA):
   A. TROPICAL CYCLONE SUMMARY: NONE.
   B. TROPICAL DISTURBANCE SUMMARY:
      (1) THE AREA OF CONVECTION (INVEST 90B) PREVIOUSLY LOCATED NEAR 
5.1N 89.4E IS NOW LOCATED NEAR 4.6N 88.9E, APPROXIMATELY 554 NM EAST-
SOUTHEAST OF COLOMBO, SRI LANKA. ANIMATED ENHANCED INFRARED SATELLITE 
IMAGERY AND A 060946Z SSMIS 91GHZ MICROWAVE IMAGE DEPICT AN OBSCURED, 
LOW-LEVEL CIRCULATION (LLC) WITH PERSISTENT CONVECTION DEVELOPING 
NEAR THE CENTER AND BEING SHEARED OFF TO THE NORTHWEST BY MODERATE 
SOUTHEASTERLY SHEAR. A 061526Z ASCAT-B BULLSEYE REVEALS A WEAK LLC 
WITH AN INVERTED WAVE FEATURE EXTENDING NORTHWARD. WINDS UP TO 25KTS 
ARE PRESENT ALONG THE WAVE AXIS, BUT MUCH LIGHTER ALONG THE SOUTHERN 
HALF OF THE LLC. A RECENT SHIP OBSERVATION FROM 061600Z IN THE BAY OF 
BENGAL INDICATES SOUTHERLY WINDS AT 8KTS WITH AN SLP OF 1011MB. 
ENVIRONMENTAL ANALYSIS REVEALS A FAVORABLE ENVIRONMENT FOR DEVELOPMENT 
WITH LOW VERTICAL WIND SHEAR OF 15-20KTS, GOOD UPPER-LEVEL OUTFLOW, AND 
WARM SEA SURFACE TEMPERATURES OF 28-29C. GLOBAL MODELS ARE IN GOOD 
AGREEMENT PORTRAYING MODERATE DEVELOPMENT AS THE INVEST TRACKS NORTHWEST 
TOWARD SRI LANKA. MAXIMUM SUSTAINED SURFACE WINDS ARE ESTIMATED AT 20 TO 
25 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 REMAINS LOW.
      (2) NO OTHER SUSPECT AREAS.
   C. SUBTROPICAL SYSTEM SUMMARY: NONE.
2. SOUTH INDIAN OCEAN AREA (135E WEST TO COAST OF AFRICA):
   A. TROPICAL CYCLONE SUMMARY:
      (1) AT 06JAN26 0600Z, TROPICAL CYCLONE 12S (JENNA) WAS LOCATED 
NEAR 15.7S 94.8E, APPROXIMATELY 243 NM SOUTH-SOUTHWEST OF THE COCOS 
ISLANDS, AND HAD TRACKED SOUTHWESTWARD AT 08 KNOTS OVER THE PAST SIX 
HOURS. MAXIMUM SUSTAINED SURFACE WINDS WERE ESTIMATED AT 90 KNOTS 
GUSTING TO 110 KNOTS. SEE REF A (WTXS31 PGTW 060900) FOR FURTHER 
DETAILS.
      (2) NO OTHER TROPICAL CYCLONES.
   B. TROPICAL DISTURBANCE SUMMARY: NONE.
   C. SUBTROPICAL SYSTEM SUMMARY: NONE.//
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