4 July 2026 - bulletin 427

Issued at 1800 GMT
Latest warnings for 09W and 10W

NORTHWESTERN PACIFIC OCEAN
SUPERTYPHOON Bavi / 09W 
Warning 15 from JTWC at 1500 GMT
Position 12.7N 150.2E
Location 315 miles E of Andersen AFB, Guam
Movement 290° (WNW) at 6 knots
Maximum sustained winds 140 knots gusting to 170 knots
Winds of 34 knots or higher occur within 145 to 160 miles of the centre
Winds of 64 knots or higher occur within 35 to 40 miles of the centre
Threatened landmasses Northern Marianas Islands 
Maximum significant wave height 45 feet
Minimum central pressure 919 mbar 
Next warning from JTWC at 2100 GMT

Regional warnings

Tropical storm Maysak / 10W 
Warning 12 from JTWC at 1500 GMT
Position 21.3N 107.8E
Location 108 miles E of Hanoi, Vietnam
Movement 350° (N) at 6 knots
Maximum sustained winds 50 knots gusting to 65 knots
Winds of 34 knots or higher occur within 30 to 180 miles of the centre
Threatened landmasses Vietnam, China
Maximum significant wave height 18 feet
Minimum central pressure 989 mbar 
Next warning from JTWC at 2100 GMT

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