28 July 2017 - bulletin 429

Updated at 0910 GMT
Latest warnings for 09E, 10E, 07W and 11W
First warning for 12W
Disturbance update


EASTERN PACIFIC OCEAN
HURRICANE Hilary / 09E
Warning 28 from NHC at 0900 GMT
Position 18.7N 117.9W
Location 590 miles WSW of the southern tip of Baja California, Mexico
Movement 300° (WNW) at 7 knots
Maximum sustained winds 60 knots gusting to 75 knots
Winds of 34 knots or higher occur within 105 miles of the centre
Minimum central pressure: 992 mbar
Threatened landmasses NONE
Next warning from NHC at 1500 GMT

Hilary will move generally westnorthwest. The system will broadly maintain current intensity but a weakening trend will commence after today. The storm is expected to merge with Irwin.

Tropical storm Irwin / 10E

Warning 24 from NHC at 0900 GMT
Position 14.9N 124.3W
Location 1120 miles WSW of the southern tip of Baja California, Mexico
Movement 270° (W) at 2 knots
Maximum sustained winds 45 knots gusting to 55 knots
Winds of 34 knots or higher occur within 70 miles of the centre
Minimum central pressure: 1001 mbar
Threatened landmasses NONE
Next warning from NHC at 1500 GMT

Irwin is quasi-stationary and will not move much for a day or so. When Hilary passes to the north, the system will moved off north, later northwest, before merging with Hilary after 3-4 days.

NORTHWESTERN PACIFIC OCEAN

TYPHOON Noru / 07W
Warning 30 from JTWC at 0900 GMT
Position 29.5N 145.3E
Location 441354 miles NE of Iwo To
Movement 240° (WSW) at 15 knots
Maximum sustained winds 65 knots gusting to 80 knots
Winds of 34 knots or higher occur within 70 to 170 miles of the centre
Winds of 64 knots or higher occur within 20 to 35 miles of the centre
Threatened landmasses NONE
Maximum significant wave height 28 feet
Next warning from JTWC at 1500 GMT

Noru will slowly veer round to the southwest. The storm will maintain current intensity before restrengthening. The system will slow down to a crawl at the end of the forecast period whilst weakening.

TYPHOON Nesat / 11W
Warning 10 from JTWC at 0900 GMT
Position 20.6N 125.3E
Location 342 miles SE of Taipei, Taiwan
Movement 310° (NW) at 8 knots
Maximum sustained winds 65 knots gusting to 80 knots
Winds of 34 knots or higher occur within 100 to 160 miles of the centre
Winds of 64 knots or higher occur within 0 to 30 miles of the centre
Threatened landmasses Taiwan, China
Maximum significant wave height 24 feet
Next warning from JTWC at 1500 GMT

Nesat will move northwest whilst intensifying. The system will peak at 80 knots prior to approaching Taiwan after two days, and making final landfall in China the day after.

Tropical depression 12W
Warning 01 from JTWC at 0900 GMT
Position 19.2N 116.3E
Location 220 miles SSE of Hong Kong
Movement 265° (W) at 8 knots
Maximum sustained winds 30 knots gusting to 40 knots
Threatened landmasses Taiwan, China
Maximum significant wave height 9 feet
Next warning from JTWC at 1500 GMT

12W has formed and will move northeast, through the Taiwan Strait and into mainland China south of Shanghai. The system will eventually merge with 11W.

TROPICAL DISTURBANCE UPDATE
NORTHERN ATLANTIC OCEAN
Update from NHC at 0600 GMT
System No Invest Assigned
Position 10N 36W
Likelihood of tropical cyclone formation within 48 hours is LOW (0%)
Likelihood of tropical cyclone formation within 5 days is LOW (30%)  

NORTHWESTERN PACIFIC OCEAN
Update from JTWC at 0900 GMT
System 92W is now 12W

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