25 September 2024 - bulletin 603

Issued at 2100 GMT
Latest warning for 09L, 10E and 18W
Disturbance update

NORTHERN ATLANTIC OCEAN
HURRICANE Helene / 09L
Warning 10 from NHC at 2100 GMT
Position 22.5N 86.6W
Location 505 miles SSW of Apalachicola, Florida
Movement 355° (N) at 9 knots
Maximum sustained winds 75 knots gusting to 90 knots
Winds of 34 knots or higher occur within 345 miles of the centre
Winds of 64 knots or higher occur within 25 miles of the centre
Threatened landmasses Mexico, Cuba, Florida, Georgia, Carolinas
Minimum central pressure 978 mbar
Next warning from NHC at 1800 GMT

Regional warnings

EASTERN PACIFIC OCEAN

Tropical storm John / 10E
Warning 12 from NHC at 2100 GMT
Position 16.8N 101.5W
Location 105 miles W of Acapulco
Movement 355° (N) at 2 knots
Maximum sustained winds 45 knots gusting to 55 knots
Winds of 34 knots or higher occur within 150 miles of the centre
Threatened landmasses Mexico
Minimum central pressure 996 mbar
Next warning from NHC at 0000 GMT

NORTHWESTERN PACIFIC OCEAN
Tropical depression Cimaron / 18W
Warning 06 from JTWC at 2100 GMT
Position 27.9N 132.8E
Location 567 miles SW of Yokosuka, Japan
Movement 300° (WNW) at 4 knots
Maximum sustained winds 30 knots gusting to 40 knots
Threatened landmasses Japan
Minimum central pressure 1002 mbar
Maximum significant wave height 12 feet
Next warning from JTWC at 0300 GMT

TROPICAL DISTURBANCE UPDATE
NORTHERN ATLANTIC OCEAN
Update from NHC at 1800 GMT
System 98L
Position 14.8N 33.7W
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 99L
Position 37.0N 56.0W
Minimum central pressure 998 mbar
Likelihood of tropical cyclone formation within 48 hours is LOW (10%)
Likelihood of tropical cyclone formation within 7 days is LOW (20%)

NORTHWESTERN PACIFIC OCEAN
Update from JTWC at 1530 GMT
System 95W
Position 16.1N 148.3E
Location 157 miles ENE of Saipan
Likelihood of tropical cyclone formation within 24 hours is now HIGH

System 96W
Position 33.7N 142.9E
Location 186 miles ESE of Yokosuka, Japan
Likelihood of tropical cyclone formation within 24 hours is LOW

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