5 September 2025 - bulletin 583

Issued at 1500 GMT
Latest warnings for 11E 
Final warning for 21W
Disturbance update
EASTERN PACIFIC OCEAN
HURRICANE Kiko / 11E
Warning 22 from NHC at 1500 GMT
Position 14.2N 137.1W
Location 1245 miles ESE of Hilo, Hawaii
Movement 285° (WNW) at 8 knots
Maximum sustained winds 100 knots gusting to 125 knots
Winds of 34 knots or higher occur within 70 miles of the centre
Winds of 64 knots or higher occur within 25 miles of the centre
Threatened landmasses Hawaii
Minimum central pressure 962 mbar 
Next warning from NHC at 2100 GMT

Hawaiian warnings

NORTHWESTERN PACIFIC OCEAN
Tropical storm Peipah / 21W
Warning 09 from JTWC at 1500 GMT
Position 35.6N 142.3E 
Location 157 miles E of Yokosuka, Japan
Movement 075° (ENE) at 30 knots
Maximum sustained winds 50 knots gusting to 65 knots
Winds of 34 knots or higher occur within 60 to 150 miles of the centre
Threatened landmasses Japan
Minimum central pressure 990 mbar 
Maximum significant wave height 24 feet
FINAL WARNING

TROPICAL DISTURBANCE UPDATE
NORTHERN ATLANTIC OCEAN
Update from NHC at 0600 GMT
System 91L
Position 11.9N 34.9W
Minimum central pressure 1011 mbar 
Likelihood of tropical cyclone formation within 48 hours is MEDIUM (60%)
Likelihood of tropical cyclone formation within 7 days is HIGH (90%)

NORTHWESTERN PACIFIC OCEAN
Update from JTWC at 1430 GMT 
System 97W 
Position 17.6N 118.7E
Location 381 miles SE of Hong Kong 
Likelihood of tropical cyclone formation within 24 hours is LOW

Hong Kong warnings

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