18 July 2017 - bulletin 401

Updated at 2140 GMT
Latest warning for 05L, 06E, 07E and 08E
Disturbance update


EASTERN PACIFIC OCEAN
HURRICANE Fernanda / 06E
Warning 28 from NHC at 2100 GMT
Position 16.0N 133.9W
Location 1415 miles E of Hilo, Hawaii
Movement 310° (NW) at 7 knots
Maximum sustained winds 90 knots gusting to 110 knots
Winds of 34 knots or higher occur within 115 miles of the centre
Winds of 64 knots or higher occur within 30 miles of the centre
Minimum central pressure: 972 mbar
Threatened landmasses NONE
Next warning from NHC at 0300 GMT

Fernanda will continue to move northwest, later west and is expected to gradually weaken over the next few days.

As this system is expected to pass west of 140W as a tropical cyclone, the Central Pacific Hurricane Center will take over the issuance of warnings at that point.

Tropical storm Greg / 07E
Warning 05 from NHC at 1500 GMT
Position 14.6N 109.0W
Location 435 miles SW of Manzanillo, Mexico
Movement 275° (W) at 8 knots
Maximum sustained winds 35 knots gusting to 45 knots
Winds of 34 knots or higher occur within 35 miles of the centre
Minimum central pressure: 1007 mbar
Threatened landmasses NONE
Next warning from NHC at 2100 GMT

Greg will move westnorthwest into the open Pacific. The system will strengthen to 50 knots before weakening again. The interaction with 08E (see below) renders the forecast uncertain.

Tropical depression 08E
Warning 02 from NHC at 2100 GMT
Position 14.9N 119.4W
Location 830 miles SW of the southern tip of Baja California
Movement 270° (W) at 4 knots
Maximum sustained winds 30 knots gusting to 40 knots
Minimum central pressure: 1007 mbar
Threatened landmasses NONE
Next warning from NHC at 0300 GMT

08E will move southwest, later west. The system will strengthen only slowly, to about 35 knots. 08E could be absorbed by 07E (see above).

NORTHERN ATLANTIC OCEAN
Tropical storm Don / 05L
Warning 05 from NHC at 2100 GMT
Position 11.7N 60.0W
Location 120 miles ESE of Grenada
Movement 275° (W) at 19 knots
Maximum sustained winds 35 knots gusting to 45 knots
Winds of 34 knots or higher occur within 35 miles of the centre
Minimum central pressure: 1010 mbar
Threatened landmasses NONE
Next warning from NHC at 0000 GMT
 
Don is moving quickly west and appears to be weakening - it could in fact cease to be a tropical cyclone later today.

Regional warnings
A tropical storm WARNING is in force for Grenada, St Vincent and the Grenadines
A tropical storm watch is in force for Bonaire
Rainfall totals of 3 to 6 inches are expected across Barbados, Trinidad and Tobago and the southern Windward Islands. Life-threatening flash floods and mudslides are possible in mountainous areas there.

TROPICAL DISTURBANCE UPDATE
NORTHERN ATLANTIC OCEAN
Update from NHC at 0600 GMT
System 96L
Position 10.4N 37.4W
Likelihood of tropical cyclone formation within 48 hours is LOW (30%)
Likelihood of tropical cyclone formation within 5 days is MEDIUM (40%) 

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