Tropical Storm Gabrielle to become hurricane by Sunday: See tracker

Tropical Storm Gabrielle continues to strengthen as it moves across the Atlantic Ocean with forecasters expecting the storm to become a hurricane by Sunday.

The storm, given the name Gabrielle on Sept. 17 , is moving northwestward at about 13 mph and is expected to have reached hurricane strength when it passes east of Bermuda beginning Sunday night, the National Hurricane Center said in an update at 11 a.m. Saturday, Sept. 20.