Tropical Cyclone Indusa weakened on Sunday as it moved quickly toward the southeast over the South Indian Ocean. At 5:00 p.m. EDT on Sunday the center of Tropical Cyclone Indusa was located at latitude 32.9°S and longitude 73.8°E which put the center about 1125 miles (1815 km) south-southeast of Port Mathurin, Rodrigues. Indusa was moving toward the southeast at 24 m.p.h. (39 km/h). The maximum sustained wind speed was 60 m.p.h. (95 km/h) and there were wind gusts to 75 m.p.h. (120 km/h). The minimum surface pressure was 995 mb.
Tropical Cyclone Indusa weakened on Sunday as it move over cooler water. In addition, an upper level trough that was southeast of Madagascar produced strong northwesterly winds that blew across the top of Indusa’s circulation. Those winds caused strong vertical wind shear. The effects of the cooler water and strong vertical wind shear caused Tropical Cyclone Indusa to weaken.
The strong northwesterly winds in the upper levels of the atmosphere blew the top half of Tropical Cyclone Indusa to the southeast of Indusa’s low level circulation. Bands around the low level center of Indusa’s circulation consisted primarily of showers and lower clouds. Since the low level circulation did not generate upper level divergence, the surface pressure increased on Sunday.
Winds to tropical storm force extended out 105 miles (165 km) from the center of Tropical Cyclone Indusa.
Tropical Cyclone Indusa will move through an environment that will be unfavorable for intensification during the next 24 hours. Indusa will move over water where the Sea Surface Temperatures are near 22°C. It will continue to be under the eastern part of the upper level trough that is southeast of Madagascar. The upper level trough will continue to produce strong northwesterly winds that will blow across the top of Indusa’s circulation. Those winds will continue to cause strong vertical wind shear. Cooler Sea Surface Temperatures and strong vertical wind shear will cause Tropical Cyclone Indusa to continue to weaken on Monday. The cooler water and strong vertical wind shear will cause Indusa to make a transition to an extratropical cyclone.
The upper level trough that is southeast of Madagascar will steer Tropical Cyclone Indusa toward the southeast during the next 24 hours. On its anticipated track, Tropical Cyclone Indusa will continue to move quickly farther away from Rodrigues.