21 July 2018 - bulletin 499

Updated at 2150 GMT
Latest warnings for 11W, 12W and 13W
First warning for 14W
Disturbance update


NORTHWESTERN PACIFIC OCEAN
Tropical depression Son-tinh / 11W
Warning 16 from JTWC at 2100 GMT
Position 19.4N 107.5E
Location 132 miles SE of Hanoi, Vietnam
Movement 105° (ESE) at 8 knots
Maximum sustained winds 25 knots gusting to 35 knots
Threatened landmasses China
Maximum significant wave height 6 feet
Next warning from JTWC at 0300 GMT

Son-tinh will cross Hainan Island and veer round to the west, finally dissipating over mainland China.

Tropical storm Ampil / 12W
Warning 17 from JTWC at 2100 GMT
Position 30.0N 124.1E
Location 287 miles NW of Kadena AB
Movement 310° (NW) at 12 knots
Maximum sustained winds 45 knots gusting to 55 knots
Winds of 34 knots or higher occur within 70 to 160 miles of the centre
Threatened landmasses China
Maximum significant wave height 24 feet
Next warning from JTWC at 0300 GMT

Ampil is moving northwest and will make final landfall in eastern China within 24 hours.

Tropical depression 13W
Philippines designation Josie
Warning 05 from JTWC at 2100 GMT
Position 20.0N 121.5E
Location 306 miles S of Taipei, Taiwan
Movement 040° (NE) at 12 knots
Maximum sustained winds 30 knots gusting to 40 knots
Threatened landmasses Philippines, Taiwan, China
Maximum significant wave height 10 feet
Next warning from JTWC at 0300 GMT

13W will veer northeast, intensifying to 35 knots. The storm will veer round to the northwest before making landfall south of Shanghai after two days.

Philippines warnings
Public storm warning signal #1 is in force in the Luzon provinces of Batanes and Northern Cagayan including Babuyan Group of Islands

Tropical depression 14W
Warning 01 from JTWC at 1500 GMT
Position 21.8N 159.4E
Location 331 miles ESE of Minami Tori Shima
Movement 010° (N) at 6 knots
Maximum sustained winds 25 knots gusting to 35 knots
Threatened landmasses NONE
Maximum significant wave height 6 feet
Next warning from JTWC at 0300 GMT

14W has formed in the open Pacific Ocean and will move broadly north, strengthening to 50 knots before turning extra-tropical, far east of Japan.

TROPICAL DISTURBANCE UPDATE
EASTERN PACIFIC OCEAN 
Update from NHC at 0600 GMT
System 90E
Position 13.4N 134.3W
Location 1700 miles WSW of the southern tip of Baja California
Likelihood of tropical cyclone formation within 48 hours is LOW (20%)
Likelihood of tropical cyclone formation within 5 days is LOW (20%)

System No Invest Assigned
Position 9N 113W
Likelihood of tropical cyclone formation within 48 hours is LOW (10%)
Likelihood of tropical cyclone formation within 5 days is MEDIUM (60%)

NORTHWESTERN PACIFIC OCEAN
Update from JTWC at 2100 GMT
System 96W
Position 11.6N 140.5E
Location 190 miles NE of Yap
Likelihood of tropical cyclone formation within 24 hours is HIGH

System 97W is now 14W

NORTHERN INDIAN OCEAN
Update from JTWC at 1800 GMT
System 96B is no longer suspect for tropical cyclone formation