18 September 2026 - bulletin 658

Issued at 1545 GMT
Disturbance update


NORTHWESTERN PACIFIC OCEAN
Tropical storm Dujuan / 24W
Warning 13 from JTWC at 1500 GMT
Position 25.4N 141.7E
Location 42 miles NNE of Iwo To
Movement 270° (W) at 11 knots
Maximum sustained winds 60 knots gusting to 75 knots
Winds of 34 knots or higher occur within 110 to 230 miles of the centre
Minimum central pressure 980 mbar
Threatened landmasses Japan
Maximum significant wave height 26 feet
Next warning from JTWC at 2100 GMT

TROPICAL DISTURBANCE UPDATE
NORTHERN ATLANTIC OCEAN
Update from NHC at 1430 GMT
System 99L
Position 33.0N 34.2W 
Minimum central pressure 1017 mbar
Likelihood of tropical cyclone formation within 48 hours is MEDIUM (60%)
Likelihood of tropical cyclone formation within 7 days is MEDIUM (60%)

EASTERN PACIFIC OCEAN
Update from NHC at 1200 GMT
System 15E 
Position 15.5N 136.0W 
Minimum central pressure 1006 mbar
Likelihood of tropical cyclone formation within 48 hours is LOW (10%)
Likelihood of tropical cyclone formation within 7 days is MEDIUM (40%)

System 98E
Position 12.0N 118.0W 
Minimum central pressure 1009 mbar
Likelihood of tropical cyclone formation within 48 hours is MEDIUM (60%)
Likelihood of tropical cyclone formation within 7 days is HIGH (80%)

System 99E
Position 8.8N 103.1W 
Likelihood of tropical cyclone formation within 48 hours is LOW (20%)
Likelihood of tropical cyclone formation within 7 days is HIGH (80%)

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