25 July 2017 - bulletin 420

Updated at 0945 GMT
Latest warnings for 07E, 09E, 10E, 07W and 09W
Final warning for 08W
Disturbance update



EASTERN PACIFIC OCEAN
Tropical storm Greg / 07E
Warning 32 from NHC at 0900 GMT
Position 15.2N 135.7W
Location 1765 miles WSW of the southern tip of Baja California, Mexico
Movement 295° (WNW) at 8 knots
Maximum sustained winds 40 knots gusting to 50 knots
Winds of 34 knots or higher occur within 70 miles of the centre
Minimum central pressure: 1003 mbar
Threatened landmasses NONE
Next warning from NHC at 1500 GMT

Greg is moving westnorthwest, later west, and is expected to slowly weaken. The storm will dissipate after two days, near 140W.

HURRICANE Hilary / 09E
Warning 16 from NHC at 0900 GMT
Position 15.3N 106.7W
Location 565 miles SSE of the southern tip of Baja California, Mexico
Movement 290° (WNW) at 9 knots
Maximum sustained winds 90 knots gusting to 110 knots
Winds of 34 knots or higher occur within 70 miles of the centre
Winds of 64 knots or higher occur within 15 miles of the centre
Minimum central pressure: 975 mbar
Threatened landmasses NONE
Next warning from NHC at 1500 GMT

Hilary will move generally westnorthwest. The system will steadily intensify, reaching 105 knots. A weakening trend will commence after tomorrow. The storm could show some interaction with Irwin (see below) late in the forecast period.

HURRICANE Irwin / 10E
Warning 12 from NHC at 0900 GMT
Position 15.5N 118.7W
Location 750 miles SW of the southern tip of Baja California, Mexico
Movement 300° (WNW) at 2 knots
Maximum sustained winds 65 knots gusting to 80 knots
Winds of 34 knots or higher occur within 80 miles of the centre
Minimum central pressure: 991 mbar
Threatened landmasses NONE
Next warning from NHC at 1500 GMT

Irwin will move west, whilst strengthening to 70 knots. There is a possibility of interaction with Hilary towards the end of the 5-day forecast period.

NORTHWESTERN PACIFIC OCEAN

TYPHOON Noru / 07W
Warning 19 from JTWC at 0900 GMT
Position 25.9N 157.6E
Location 221 miles ENE of Minami Tori Shima, Japan
Movement 075° (ENE) at 8 knots
Maximum sustained winds 85 knots gusting to 105 knots
Winds of 34 knots or higher occur within 95 miles of the centre
Winds of 64 knots or higher occur within 15 miles of the centre
Threatened landmasses NONE
Maximum significant wave height 27 feet
Next warning from JTWC at 1500 GMT

Noru is moving east on its loop motion that will occur over the next few days. The system will intensify to 95 knots, before weakening as it once more travels southwest. A limited interaction with Kulap is anticipated. 

Tropical storm Sonca / 08W
Warning 18 from JTWC at 0900 GMT
Position 17.0N 107.2E
Location 87 miles NW of Da Nang, Vietnam
Movement 275° (W) at 12 knots
Maximum sustained winds 40 knots gusting to 50 knots
Winds of 34 knots or higher occur within 45 miles of the centre
Threatened landmasses Vietnam
Maximum significant wave height 12 feet
FINAL WARNING

Sonca has made landfall in Vietnam, and will now dissipate inland. 

Tropical storm Kulap / 09W
Warning 17 from JTWC at 0900 GMT
Position 32.7N 154.8E
Location 512 miles N of Minami Tori Shima, Japan
Movement 265° (W) at 15 knots
Maximum sustained winds 35 knots gusting to 45 knots
Winds of 34 knots or higher occur within 30 to 125 miles of the centre
Threatened landmasses NONE
Maximum significant wave height 12 feet
Next warning from JTWC at 1500 GMT

Kulap will move west but will weaken and dissipate later today as it is being absorbed by Noru.

TROPICAL DISTURBANCE UPDATE
NORTHWESTERN PACIFIC OCEAN
Update from JTWC at 0600 GMT
System 99W
Position 13.0N 129.2E
Location 430 miles SE of Luzon, Philippines
Likelihood of tropical cyclone formation within 24 hours is MEDIUM

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