Tropical Storm Isaias Expected to Become First Atlantic Hurricane of 2026
Forecasters anticipate Isaias will strengthen rapidly, bringing potential for damaging winds, heavy rain, and storm surge to the US Gulf Coast.
Tropical Storm Isaias has formed in the Gulf of Mexico and is forecast to become the first Atlantic hurricane of the 2026 season, potentially reaching Category 2 strength by Friday. The storm is expected to make landfall on the US Gulf Coast late Friday or early Saturday, with parts of Mexico also anticipating strong winds and heavy rainfall.
According to the US National Hurricane Center, Isaias is likely to reach hurricane strength on Wednesday night and intensify further to a Category 2 storm by Friday morning. The storm's projected path suggests it could impact regions from Mississippi to Florida.
Residents of the US Gulf Coast can expect 3 to 6 inches (75-150mm) of rain, with some areas possibly receiving up to 10 inches (250mm), leading to concerns about flash flooding, particularly in urban areas. Dangerous winds and a potential storm surge that could inundate low-lying coastal regions are also anticipated.
Florida Governor Ron DeSantis has declared a state of emergency across 25 north Florida counties in anticipation of the storm's impact. The National Weather Service is expected to issue Hurricane and Storm Surge Watches later on Wednesday.
As Isaias moves inland and away from its warm water fuel source, it is expected to weaken, but could still bring disruptive wet weather to large areas of the southeastern United States, including the Tennessee Valley and the Carolinas, with forecast rainfall of 1 to 3 inches (25-75mm) and isolated higher totals.
The Atlantic hurricane season has been unusually quiet leading up to Isaias, largely attributed to a strong El Niño developing in the Pacific Ocean. This phenomenon typically disrupts wind patterns in the Atlantic, increasing wind shear which can tear developing storms apart. Forecasters had predicted a below-average season with fewer named storms and hurricanes.
Isaias, however, has formed over the Gulf of Mexico, where sea temperatures are currently around 2C higher than normal, providing ample fuel for the storm. Despite the presence of limited wind shear, which allows for strengthening, forecasters note that shear is expected to increase in the 24 hours before landfall, potentially limiting the storm's intensity. The complex interplay of factors influencing hurricane development means forecasts may continue to evolve.