Satellite imagery indicates that the Tropical Depression formerly known as Three has become better organized and is now Tropical Storm Bill with maximum winds of 40 mph. Bill is in the deep tropics, further south than Ana, and is well within the easterly trade winds. It's moving steadily a little south of due west around 16 mph, and a gradual turn to the west-northwest is expected. Bill has a large circulation and has favorable conditions for development, including light wind shear and warm water temperatures. It is expected to become a hurricane within 4 days.
Meanwhile, little sister Ana still has maximum winds of 40 mph as it continues moving westward at 17 mph. The Netherlands Antilles government has issued a tropical storm watch for St. Maarten, Saba, and St. Eustatius.
Images (click to enlarge): Tropical Storms Bill and Ana forecast tracks from National Hurricane Center
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