4 September 2025 - bulletin 581

Issued at 2120 GMT
Latest warnings for 11E, 12E and 21W
Disturbance update
EASTERN PACIFIC OCEAN
HURRICANE Kiko / 11E
Warning 19 from NHC at 2100 GMT
Position 13.8N 133.7W
Location 1410 miles ESE of Hilo, Hawaii
Movement 275° (W) at 8 knots
Maximum sustained winds 115 knots gusting to 140 knots
Winds of 34 knots or higher occur within 80 miles of the centre
Winds of 64 knots or higher occur within 30 miles of the centre
Threatened landmasses Hawaii
Minimum central pressure 951 mbar 
Next warning from NHC at 0300 GMT

Tropical storm Lorena / 12E

Warning 12 from NHC at 2100 GMT
Position 24.6N 114.8W
Location 155 miles W of Cabo San Lazaro, Mexico
Movement 305° (NW) at 6 knots
Maximum sustained winds 45 knots gusting to 55 knots
Winds of 34 knots or higher occur within 60 miles of the centre
Threatened landmasses Mexico
Minimum central pressure 996 mbar 
Next warning from NHC at 0300 GMT

Mexican warnings

NORTHWESTERN PACIFIC OCEAN

Tropical storm Peipah / 21W
Warning 06 from JTWC at 2100 GMT
Position 33.1N 132.8E 
Location 80 miles SSE of Iwakuni, Japan
Movement 040° (NE) at 10 knots
Maximum sustained winds 35 knots gusting to 45 knots
Winds of 34 knots or higher occur within 45 to 85 miles to the south of the centre
Threatened landmasses Japan
Minimum central pressure 1000 mbar 
Maximum significant wave height 20 feet
Next warning from JTWC at 0300 GMT

TROPICAL DISTURBANCE UPDATE
NORTHERN ATLANTIC OCEAN
Update from NHC at 1800 GMT
System 91L
Position 12.1N 34.2W
Likelihood of tropical cyclone formation within 48 hours is MEDIUM (60%)
Likelihood of tropical cyclone formation within 7 days is HIGH (90%)

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