Tag Archives: Van Dieman Gulf

Tropical Cyclone Fina Crosses Cobourg Peninsula

Tropical Cyclone Fina moved across the Cobourg Peninsula in northern Australia on Friday.  At 4:00 p.m. EST on Friday the center of Tropical Cyclone Fina was located at latitude 11.8°S and longitude 131.6°E which put the center about 80 miles (130 km) northeast of Darwin, Australia.   Fina was moving toward the southwest at 8 m.p.h. (13 km/h).   The maximum sustained wind speed was 80 m.p.h. (130 km/h) and there were wind gusts to 100 m.p.h. (160 km/h).  The minimum surface pressure was 979 mb.

A Warning is in effect for the portion of the coast from Daly River Mouth to Cape Don, Australia.  The Warning includes Darwin.  A Warning is also in effect for the Tiwi Islands.

A Watch is in effect for the portion of the coast from Wadeye to Daly River Mouth.

Tropical Cyclone Fina intensified a little after it crossed the Cobourg Peninsula and moved over the Van Dieman Gulf.  A small circular eye was at the center of Fina’s circulation.  The eye was surrounded by a ring of thunderstorms and the strongest winds were occurring in that ring of storms.  Bands of showers and thunderstorms were revolving around the core of Tropical Cyclone Fina.  Storms near the core of Fina generated upper level divergence that pumped mass away from the tropical cyclone.  The removal of mass caused the surface pressure to decrease.

The circulation around Tropical Cyclone Fina was small.  Winds to hurricane/typhoon force extended out 20 miles (30 km) from the center of Fina’s circulation.  Winds to tropical storm force extended out 70 miles (110 km) from the center of Tropical Cyclone Fina.

Tropical Cyclone Fina will move through an environment somewhat favorable for intensification while it moves over the Van Dieman Gulf during the next few hours. Fina will move over water where the Sea Surface Temperatures are near 30°C.  It will move under the western end of an upper level ridge over northern Australia.  The upper level ridge will produce northerly winds that will blow toward the top of Fina’s circulation.  Those winds will cause some vertical wind shear.  The vertical wind shear will inhibit intensification, but the wind shear may not be enough to prevent intensification.  Tropical Cyclone Fina could intensify during the next 24 hours.

Tropical Cyclone Fina will move around the western end of a high pressure system over northern Australia.  The high pressure system will steer Fina toward the southwest during the next 24 hours.   On its anticipated track, the center of Tropical Cyclone Fina will pass near Darwin in 12 hours.   Fina will move over the Timor Sea on Saturday.

Tropical Cyclone Fina will bring strong winds and heavy rain to the coast of the Northern Territory of Australia.  Heavy rain is likely to cause floods in some locations.  Tropical Cyclone Fina could also cause a storm surge of up to 7 feet (2 meters) along parts of the coast of the Northern Territory.

Flood Watches are in effect for the North West Coastal Rivers.