Tropical Storm Barbara formed south of Baja California on Sunday as the remnants of former Hurricane Alvin were dissipating over the Eastern North Pacific Ocean. At 11:00 a.m. EDT on Sunday the center of Tropical Storm Barbara was located at latitude 10.6°N and longitude 110.4°W which put it about 850 miles (1370 km) south of the southern tip of Baja California. Barbara was moving toward the west-northwest at 16 m.p.h. (26 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.
More thunderstorms developed near the center of a low pressure system south of Baja California on Sunday and the National Hurricane Center designated the system as Tropical Storm Barbara. Bands of showers and thunderstorms were revolving around the center of circulation. Storms near the center were generating upper level divergence which was pumping mass away from the tropical storm. Tropical Storm Barbara was larger than former Hurricane Alvin. Winds to tropical storms force extended out about 80 miles (130 km) from the center of circulation.
Tropical Storm Barbara will move through an environment favorable for intensification during the next several days. Barbara will move over water where the Sea Surface Temperature is near 29°C. It will move through an area where the upper level winds are weak and there will be little vertical wind shear. Tropical Storm Barbara will continue to intensify and it is likely to strengthen into a hurricane by the middle of the week. Barbara could intensify rapidly when the inner core is more developed.
Tropical Storm Barbara will move south of a subtropical ridge over the Eastern North Pacific Ocean. The ridge will steer Barbara toward the west-northwest. On its anticipated track Tropical Storm Barbara will move away from Baja California and the rest of Mexico.