11 August 2026 - bulletin 541

Issued at 0845 GMT
Latest warnings for 13W, 14W and 15W
Disturbance update

NORTHWESTERN PACIFIC OCEAN
Tropical depression Peilou / 13W
Warning 18 from JTWC at 0900 GMT
Position 26.0N 158.0E
Location 623 miles NW of Wake Island
Movement 050° (NE) at 6 knots
Maximum sustained winds 30 knots gusting to 40 knots
Threatened landmasses NONE
Minimum central pressure 997 mbar 
Maximum significant wave height 12 feet
Next warning from JTWC at 1500 GMT

Tropical storm Chan-hom / 14W
Warning 18 from JTWC at 0900 GMT
Position 36.5N 142.0E
Location 133 miles ENE of Yokosuka, 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 982 mbar 
Maximum significant wave height 25 feet
Next warning from JTWC at 1500 GMT

Tropical depression 15W
Warning 06 from JTWC at 0900 GMT
Position 28.4N 160.8E
Location 632 miles NNW of Wake Island
Movement 030° (NNE) at 10 knots
Maximum sustained winds 25 knots gusting to 35 knots
Threatened landmasses NONE
Minimum central pressure 997 mbar 
Maximum significant wave height 11 feet
Next warning from JTWC at 1500 GMT

TROPICAL DISTURBANCE UPDATE
NORTH
WESTERN PACIFIC OCEAN
Update from JTC
W at 0600 GMT
System 91
W
Position 22.2N 136.6E
Location 303 miles 
WSW of Iwo To
Minimum central pressure 1001 mbar 
Likelihood of tropical cyclone formation within 24 hours is LOW

NORTHERN ATLANTIC OCEAN
Update from NHC at 0600 GMT 
System No Invest Assigned 
Position 10N 50W 
Likelihood of tropical cyclone formation within 48 hours is LOW (10%)
Likelihood of tropical cyclone formation within 7 days is LOW (10%)

System No Invest Assigned
Position 10N 30W
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 30N 68W 
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 0600 GMT
System No Invest Assigned 
Position 11N 130W
Likelihood of tropical cyclone formation within 48 hours is LOW (30%)
Likelihood of tropical cyclone formation within 7 days is MEDIUM (60%)

CENTRAL PACIFIC OCEAN
Update from CPHC at 0600 GMT
System 93C
Position 10.7N 140.8W
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%)