20 March 2018 - bulletin 209

Updated at 2140 GMT
Latest warnings for 15S
Disturbance update


SOUTHERN INDIAN OCEAN
Tropical cyclone Marcus / 15S
Warning 21 from JTWC at 2100 GMT
Position 14.6S 113.8E
Location 439 miles NW of Port Hedland, Australia
Movement 265° (W) at 14 knots
Maximum sustained winds 115 knots gusting to 130 knots
Winds of 34 knots or higher occur within 105 to 155 miles of the centre
Winds of 64 knots or higher occur within 30 to 45 miles of the centre
Threatened landmasses Western Australia
Maximum significant wave height 47 feet
Next warning from JTWC at 2100 GMT

Marcus is moving west in the open Indian Ocean. A rapid intensification will lead to a peak strength of 130 knots in a day or so. The cyclone will then veer towards the south and weaken, finally  dissipating within 5 days.

TROPICAL DISTURBANCE UPDATE
NORTHWESTERN PACIFIC OCEAN
Update from JTWC at 0600 GMT
System 96W
Position 8.5N 148.5E
Location 211 miles WNW of Chuuk
Likelihood of tropical cyclone formation within 24 hours is MEDIUM

SOUTHWESTERN PACIFIC OCEAN
Update from JTWC at 0600 GMT
System 94P
Position 7.4S 137.1E
Location 228 miles NNE of Gove Airport, Australia
Likelihood of tropical cyclone formation within 24 hours is LOW

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