Tropical Storm Francine is expected to strengthen to a hurricane by midweek when it reaches the U.S. Gulf Coast.
The storm started as a disturbance in the Gulf of Mexico and strengthened into a tropical storm Monday.
The National Oceanic and Atmospheric Administration had predicted above-normal hurricane activity in the Atlantic basin this year, forecasting a range of 17 to 25 total named storms — which is defined by having winds of 39 mph or higher, with eight to 13 forecast to become hurricanes. The above-normal activity was forecast because of near-record warm ocean temperatures in the Atlantic, La Niña conditions in the Pacific, reduced Atlantic trade winds and less wind shear.
This article was originally published on NBCNews.com
