Former Tropical Storm Henriette rapidly intensified to a hurricane northeast of Hawaii on Sunday. At 5:00 p.m. EDT on Sunday the center of Hurricane Henriette was located at latitude 25.7°N and longitude 152.5°W which put the center about 455 miles (735 km) northeast of Honolulu, Hawaii. Henriette was moving toward the northwest at 17 m.p.h. (28 km/h). The maximum sustained wind speed was 80 m.p.h. (130 km/h) and there were wind gusts to 100 m.p.h. (160 km/h). The minimum surface pressure was 990 mb.
Former Tropical Storm Henriette rapidly intensified to a hurricane northeast of Hawaii on Sunday. The inner end of a rainband wrapped around the center of Henriette’s circulation. A circular eye with a diameter of 15 miles (24 km) formed at the center of Hurricane Henriette. The eye was surrounded by a ring of thunderstorms and the strongest winds were occurring in that rings of storms. Bands of showers and thunderstorms were revolving around the center of Henriette’s circulation. Storms near the center of Henriette generated upper level divergence that pumped mass away from the hurricane. The removal of mass caused the surface pressure to decrease.
The circulation around Hurricane Henriette was small. Winds to hurricane force extended out 20 miles (30 km) from the center of Henriette’s circulation. Winds to tropical storm force extended out 70 miles (110 km) from the center of Hurricane Henriette.
Hurricane Henriette will move through an environment favorable for intensification during the next 24 hours. Henriette will move over water where the Sea Surface Temperatures are near 26°C. It will move under the middle of an upper level trough that is east of Hawaii. The upper level winds are weak near the middle of the trough and there will be little vertical wind shear. Hurricane Henriette will intensify during the next 24 hours. Henriette could continue to intensify rapidly.
Hurricane Henriette will move around the southwestern part of a high pressure system over the central North Pacific Ocean. The high pressure system will steer Henriette toward the northwest during the next 24 hours. On its anticipated track, Hurricane Henriette will pass well to the north of Hawaii.
Elsewhere, Tropical Storm Ivo continued to churn west of Baja California. At 5:00 p.m. EDT on Sunday the center of Tropical Storm Ivo was located at latitude 22.1°N and longitude 117.2°W which put the center about 470 miles (755 km) west of the southern tip of Baja California. Ivo was moving toward the west-northwest at 12 m.p.h. (19 km/h). The maximum sustained wind speed was 40 m.p.h. (65 km/h) and there were wind gusts to 50 m.p.h. (80 km/h). The minimum surface pressure was 1006 mb.
