11 August 2026 - bulletin 542

Issued at 1350 GMT
Latest warnings for 13W and 14W 
Disturbance update

NORTHWESTERN PACIFIC OCEAN
Tropical depression Peilou / 13W
Warning 19 from JTWC at 1500 GMT
Position 26.1N 159.5E
Location 320 miles ENE of Minami Tori Shima
Movement 065° (ENE) at 15 knots
Maximum sustained winds 30 knots gusting to 40 knots
Threatened landmasses NONE
Minimum central pressure 999 mbar 
Maximum significant wave height 15 feet
Next warning from JTWC at 2100 GMT

Tropical storm Chan-hom / 14W
Warning 19 from JTWC at 1500 GMT
Position 36.0N 140.0E
Location 27 miles NW of Narita Airport, Japan
Movement 255° (WSW) at 13 knots
Maximum sustained winds 40 knots gusting to 50 knots
Winds of 34 knots or higher occur within 75 to 175 miles of the centre
Threatened landmasses Japan
Minimum central pressure 994 mbar 
Next warning from JTWC at 2100 GMT

TROPICAL DISTURBANCE UPDATE
NORTH
WESTERN PACIFIC OCEAN
Update from JTWC
 at 1230 GMT
System 91
W
Position 22.2N 137.3E
Location 271 miles 
SW of Iwo To
Minimum central pressure 1001 mbar 
Likelihood of tropical cyclone formation within 24 hours is now MEDIUM

NORTHERN ATLANTIC OCEAN
Update from NHC at 1200 GMT 
System No Invest Assigned
Position 10N 31W
Likelihood of tropical cyclone formation within 48 hours is LOW (30%)
Likelihood of tropical cyclone formation within 7 days is HIGH (70%)

System No Invest Assigned 
Position 37N 57W 
Likelihood of tropical cyclone formation within 48 hours is LOW (10%)
Likelihood of tropical cyclone formation within 7 days is LOW (10%)

EASTERN PACIFIC OCEAN
Update from NHC at 1200 GMT
System No Invest Assigned 
Position 11N 130W
Likelihood of tropical cyclone formation within 48 hours is MEDIUM (40%)
Likelihood of tropical cyclone formation within 7 days is MEDIUM (60%)

CENTRAL PACIFIC OCEAN
Update from CPHC at 1200 GMT
System 93C
Position 11.4N 141.0W
Minimum central pressure 1006 mbar
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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