Tropical Storm Gabrielle continues to spin in the Atlantic and is expected to strengthen into a hurricane by the end of the weekend, according to the National Hurricane Center .
The hurricane center said in a Sept. 19 advisory that Gabrielle was located about 945 miles southeast of Bermuda with maximum sustained winds near 50 mph with higher gusts. Forecasters said "gradual strengthening" is expected, and Gabrielle is forecast to become a hurricane by Sunday, Sept. 21.