Tropical Cyclone Seroja Turns Toward Western Australia

Tropical Cyclone Seroja turned toward the coast of Western Australia on Saturday. At 5:00 p.m. EDT on Saturday the center of Tropical Cyclone Seroja was located at latitude 23.2°S and longitude 110.2°E which put it about 435 miles (700 km) northwest of Kalbarri, Australia. Seroja was moving toward the southeast at 12 m.p.h. (19 km/h). The maximum sustained wind speed was 75 m.p.h. (120 km/h) and there were wind gusts to 90 m.p.h. (145 km/h). The minimum surface pressure was 979 mb.

A Tropical Cyclone Warning was in effect from Minilya Roadhouse to Lancelin, Australia. The Warning included Cape Cuvier, Carnavon, Denham, Kalbarri, Jurien Bay and Lancelin.

Tropical Cyclone Seroja intensified to the equivalent of a hurricane/typhoon after it turned toward the coast of Western Australia on Saturday. The inner end of a rainband wrapped around the center of Seroja and microwave satellite images showed evidence of the formation of an eye. The strongest thunderstorms were occurring in bands in the eastern half of Tropical Cyclone Seroja. Bands in the western half of the circulation consisted primarily of showers and lower clouds. Storms near the center of Seroja generated upper level divergence that pumped mass away to the southeast of the tropical cyclone. Winds to hurricane/typhoon force extended out 30 miles (50 km) from the center of Tropical Cyclone Seroja. Winds to tropical storm force extended out 125 miles (200 km) from the center of circulation.

Tropical Cyclone Seroja will move through an environment favorable for intensification during the next 12 hours. Seroja will move over water where the Sea Surface Temperatures will be near 29°C. An upper level trough over the South Indian Ocean will produce northwesterly winds which will blow toward the top of Seroja. Those winds will cause moderate vertical wind shear. The wind shear will limit intensification, but Tropical Cyclone Seroja could get a little stronger during the next 12 hours. Seroja will begin to weaken when it moves over Western Australia.

The upper level trough over the South Indian Ocean will steer Tropical Cyclone Seroja toward the southeast during the next 36 hours. On its anticipated track the center of Tropical Cyclone Seroja will pass just to the west of Denham during the next 12 hours. Seroja make landfall on the coast of Western Australia near Kalbarri in 15 hours. Tropical Cyclone Seroja will move across the southwestern part of Western Australia after it makes landfall.

Tropical Cyclone Seroja will bring produce winds to hurricane/typhoon force to the portion of the coast near Kalbarri. Winds to tropical storm force could occur along the portion of the coast from Denham to Geraldton. Wind blowing water toward the coast could cause a storm surge of up to 7 feet (2 meters) near where the center makes landfall. Tropical Cyclone Seroja will drop locally heavy rain over parts of Western Australia. Flood Watches have been issued for the Wooramel, Murchison, Greenough, Yarra Yarra Lakes, Avon River and parts of the Salt Lake Catchments.