4 January 2026 - bulletin 13

Issued at 2210 GMT
First warning for 12S
Disturbance update

SOUTHERN INDIAN OCEAN
Tropical cyclone 12S 
Warning 01 from JTWC at 2100 GMT
Position 9.7S 96.9E
Location 150 miles N of the Cocos Islands
Movement 140° (SE) at 13 knots
Maximum sustained winds 40 knots gusting to 50 knots
Winds of 34 knots or higher occur within 45 to 115 miles of the centre
Threatened landmasses Cocos Islands
Minimum central pressure 1001 mbar
Maximum significant wave height 19 feet
Next warning from JTWC at 0900 GMT

Cocos Islands warnings

TROPICAL DISTURBANCE UPDATE
SOUTHERN INDIAN OCEAN
Update from JTWC at 2100 GMT 
System 91S is now 12S

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