Tropical Storm Genevieve was still a tropical storm on Saturday evening as it approached the Central Pacific Ocean. At 11:00 p.m. EDT on Saturday the center of Tropical Storm Genevieve was located at latitude 23.5°N and longitude 136.0°W which put the center about 1655 miles (2665 km) west of southern tip of Baja California. Genevieve was moving toward the west-northwest at 14 m.p.h. (22 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 1004 mb.
Tropical Storm Genevieve continued to weaken gradually on Saturday as it moved over cooler water. Thunderstorms were still occurring in bands in the northern side of Genevieve’s circulation. Bands in the southern side of Tropical Storm Genevieve consisted primarily of showers and lower clouds. Storms near the center of Genevieve still generated some upper level divergence that pumped mass away to the north of the tropical storm. The removal of mass in the upper levels was less than the convergence of mass in the lower levels of the atmosphere. So, the surface pressure increased gradually on Saturday.
The asymmetrical distribution of thunderstorms in Tropical Storm Genevieve caused the distribution of wind speeds also to be asymmetrical. Winds to tropical storm force extended out 140 miles (220 km) in the northern half of Genevieve’s circulation. Winds to tropical storm force only extended out 45 miles in the southern half of Tropical Storm Genevieve.
Tropical Storm Genevieve will move through an environment that will be unfavorable for intensification during the next 24 hours. Genevieve will move over water where the Sea Surface Temperatures are near 23.5°C. It will move under the eastern side of an upper level trough that is east of Hawaii. The upper level trough will produce southwesterly winds that will blow toward the top of Genevieve’s circulation. Those winds will cause the vertical wind shear to increase on Sunday. Tropical Storm Genevieve will continue to weaken on Sunday because of the cooler water and more vertical wind shear.
Tropical Storm Genevieve will move around the southern part of a high pressure system that is over the Eastern North Pacific Ocean. The high pressure system will steer Genevieve toward the west-northwest during the next 24 hours. On its anticipated track, Tropical Storm Genevieve will move over the Central North Pacific Ocean on Sunday. Genevieve should stay well to the northeast of Hawaii.