Tropical Storm Alvin developed south of Baja California on Wednesday morning, when former Tropical Depression One-E strengthened to a tropical storm. At 11:00 a.m. EDT on Wednesday the center of Tropical Storm Alvin was located at latitude 14.7°N and longitude 109.4°W which put it about 565 miles (915 km) south of the southern tip of Baja California. Alvin was moving toward the west at 14 m.p.h. (22 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 1005 mb.
The circulation around Tropical Storm Alvin exhibited greater organization on Wednesday morning. A band of thunderstorms wrapped around the eastern side of the center of circulation. Other bands of showers and thunderstorms were organizing in the eastern half of the circulation. Winds to tropical storm force extended out about 35 miles (55 km) from the center on the eastern side of the circulation. Bands in the western half of the circulation consisted primarily of showers and lower clouds. Storms near the center were generating upper level divergence which was pumping mass away from the tropical storm.
Tropical Storm Alvin will move through an environment favorable for intensification during the next 24 to 36 hours. Alvin will move over water where the Sea Surface Temperature is near 28°C. Tropical Storm Alvin will move south of an upper level ridge. The ridge will produce northeasterly winds which will blow toward the top of the circulation. Those winds will cause some vertical wind shear, but the shear will not be strong enough to prevent intensification. Tropical Storm Alvin will intensify during the next day or two and it could strengthen into a hurricane.
The upper level ridge will steer Tropical Storm Alvin toward the west during the next several days. Alvin could move a little to the south of due west during the next 24 hours. On its anticipated track Tropical Storm Alvin will move steadily farther away from Mexico.