21 July 2017 - bulletin 408

Updated at 1000 GMT
Latest warnings for 06E, 07E, 07W
First warnings for 08W and 09W
Disturbance update



CENTRAL PACIFIC OCEAN
Tropical storm Fernanda / 06E
Warning 36 from CPHC at 2100 GMT
Position 18.4N 142.5W
Location 825 miles E of Hilo, Hawaii
Movement 280° (W) at 10 knots
Maximum sustained winds 45 knots gusting to 55 knots
Winds of 34 knots or higher occur within 80 miles of the centre
Minimum central pressure: 1000 mbar
Threatened landmasses NONE
Next warning from CPHC at 1500 GMT

Fernanda will move westnorthwest, and is continuing to weaken. The system will cease to be a tropical cyclone within a day or so.

As this system has now passed west of 140W, the Central Pacific Hurricane Center will take over the issuance of warnings as of 0300 GMT.

Tropical storm Greg / 07E
Warning 16 from NHC at 0900 GMT
Position 14.5N 118.3W
Location 800 miles SW of the southern tip of Baja California, Mexico
Movement 280° (W) at 9 knots
Maximum sustained winds 45 knots gusting to 55 knots
Winds of 34 knots or higher occur within 60 miles of the centre
Minimum central pressure: 1003 mbar
Threatened landmasses NONE
Next warning from NHC at 1500 GMT

Greg will continue to move west and is expected to strengthen to 65 knots before weakening again.

NORTHWESTERN PACIFIC OCEAN

Tropical depression Noru / 07W
Warning 03 from JTWC at 0900 GMT
Position 28.2N 155.7E
Location 257 miles NNE of Minami Tori Shima, Japan
Movement 280° (W) at 10 knots
Maximum sustained winds 30 knots gusting to 40 knots
Threatened landmasses NONE
Maximum significant wave height 14 feet
Next warning from JTWC at 1500 GMT

Noru will move west. As it interacts with tropical storm 09W, the track forecast becomes highly uncertain. 07W will intensify to 65 knots, before the aforementioned interaction, which will prompt a rapid weakening.

Tropical depression 08W
Warning 02 from JTWC at 0900 GMT
Position 17.8N 113.7E
Location 271 miles S of Hong Kong
Movement 300° (WNW) at 11 knots
Maximum sustained winds 30 knots gusting to 40 knots
Threatened landmasses Hainan Island, Vietnam
Maximum significant wave height 10 feet
Next warning from JTWC at 1500 GMT

08W formed earlier today, and will track across Hainan Island, then into northern Vietnam. The system will peak at 50 knots before reaching Hainan.

Tropical storm Kulap / 09W
Warning 01 from JTWC at 0900 GMT
Position 26.5N 177.1E
Location 723 miles NE of Wake Island
Movement 355° (N) at 10 knots
Maximum sustained winds 35 knots gusting to 45 knots
Threatened landmasses NONE
Maximum significant wave height 11 feet
Next warning from JTWC at 1500 GMT

Kulap has formed and will move westnorthwest, whilst strengthening to 50 knots. It will approach tropical storm 07W (see above). The resulting interaction will likely slow down and weaken the system.

TROPICAL DISTURBANCE UPDATE
NORTHWESTERN PACIFIC OCEAN
Update from JTWC at 0600 GMT
System 96W is now 08W
System 97W is now 09W

System 98W
Position 18.1N 124.7E
Location 366 miles SE of Kaohsiung, Taiwan
Likelihood of tropical cyclone formation within 24 hours  is HIGH
System 99W
Position 6.0N 135.0E
Location 114 miles SE of Palau
Likelihood of tropical cyclone formation within 24 hours is MEDIUM

EASTERN PACIFIC OCEAN
Update from NHC at 0600 GMT
System 99E
Position 12.1N 108.6W
Likelihood of tropical cyclone formation within 48 hours is HIGH (70%)
Likelihood of tropical cyclone formation within 5 days is HIGH (90%)

System 90E
Position 8.5N 90.7W
Likelihood of tropical cyclone formation within 48 hours is MEDIUM (50%)
Likelihood of tropical cyclone formation within 5 days is HIGH (90%)

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