Tropical Cyclone Grant continued to churn westward over the South Indian Ocean on Friday. At 10:00 p.m. EST on Friday the center of Tropical Cyclone Grant was located at latitude 11.8°S and longitude 89.7°E which put the center about 460 miles (740 km) west of the Cocos Islands. Grant was moving toward the west at 9 m.p.h. (15 km/h). The maximum sustained wind speed was 70 m.p.h. (110 km/h) and there were wind gusts to 85 m.p.h. (135 km/h). The minimum surface pressure was 989 mb.
Tropical Cyclone Grant strengthened a little more on Friday. Even though Grant strengthened, the structure of its circulation did not change much. Thunderstorms were still occurring near the center of Grant’s circulation. Thunderstorms were also occurring in bands in the southern and western parts of Tropical Cyclone Grant. Bands in the northern and eastern part of Grant’s circulation consisted primarily of showers and lower clouds. Storms near the center of Grant generated upper level divergence that pumped mass away from the tropical cyclone. The removal of mass caused the surface pressure to decrease slowly.
The circulation around Tropical Cyclone Grant continued to be small. Winds to tropical storm force extended out 50 miles (80 km) from the center of Grant’s circulation.
Tropical Cyclone Grant will move through an environment somewhat favorable for intensification during the next 24 hours. Grant will move over water where the Sea Surface Temperatures are near 28°C. It will move under the northwestern part of an upper level ridge over the South Indian Ocean. The upper level ridge will produce northeasterly winds that will cause some vertical wind shear. The wind shear will inhibit intensification, but the shear may not be enough to prevent intensification. Tropical Cyclone Grant could intensify a little more during the next 24 hours. Grant could strengthen to the equivalent of a hurricane/typhoon during the weekend.
Tropical Cyclone Grant will move around the northern side of a high pressure system over the South Indian Ocean. The high pressure system will steer Grant toward the west during the next 24 hours. On its anticipated track, Tropical Cyclone Grant will pass south of Diego Garcia in four days.
