Tropical Cyclone Anggrek Forms Northwest of Cocos Islands

Tropical Cyclone Anggrek formed over the South Indian Ocean northwest of Cocos Islands on Monday. At 7:00 p.m. EST on Monday the center of Tropical Cyclone Anggrek was located at latitude 9.4°S and longitude 93.8°E which put it about 285 miles (455 km) northwest of Cocos Islands. Anggrek was moving toward the east-northeast at 2 m.p.h. (3 km/h). The maximum sustained wind speed was 45 m.p.h. (75 km/h) and there were wind gusts to 60 m.p.h. (95 km/h). The minimum surface pressure was 994 mb.

A low pressure system over the South Indian Ocean northwest of Cocos Islands strengthened on Monday and the Australian Bureau of Meteorology designated the system as Tropical Cyclone Anggrek. More thunderstorms formed near the center of Anggrek’s circulation. The inner end of a rainband wrapped around the northern side of the center of circulation. Storms near the center generated upper level divergence that pumped mass away from the tropical cyclone. Bands of showers and thunderstorms were revolving around the center of Tropical Cyclone Anggrek. Winds to tropical storm force extended out 70 miles (110 km) from the center of Anggrek.

Tropical Cyclone Anggrek will move through an environment somewhat favorable for intensification during the next 24 ours. Anggrek will move over water where the Sea Surface Temperatures are near 28°C. It will move under the western part of an upper level ridge over the eastern part of the South Indian Ocean. The upper level ridge will produce northerly winds that will blow toward the top of Anggrek’s circulation. Those winds will cause some vertical wind shear. The wind shear will inhibit intensification, but the shear may not be enough to prevent strengthening. Tropical Cyclone Anggrek could strengthen during the next 24 hours.

Tropical Cyclone Anggrek will move around the southern part of a near equatorial ridge over the South Indian Ocean. The ridge will steer Anggrek toward the east during the next 24 hours. On its anticipated track, Tropical Cyclone Anggrek will meander slowly northwest of the Cocos Islands. A high pressure system west of Australia is likely to steer Anggrek toward the south later this week. A Watch has been issued for Cocos Islands.

Elsewhere over the South Indian Ocean, Tropical Cyclone Belal moved south of Mauritius. At 10:00 p.m. EST on Monday the center of Tropical Cyclone Belal was located at latitude 22.3°S and longitude 58.3°E which put it about 140 miles (230 km) south-southeast of Port Louis, Mauritius. Belal was moving toward the southeast at 10 m.p.h. (16 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 981 mb.