Tropical Storm Isaias formed in the Gulf on Wednesday and is expected to become the first Atlantic hurricane of the season, forecasters say.

According to the National Hurricane Center in Miami, the storm will strengthen as it moves toward the U.S. Gulf Coast later this week, becoming a hurricane by Thursday.

The Atlantic hurricane season, which runs from June to November, has not gone this late in the year without a hurricane since 1905, according to the Associated Press. A typical Atlantic hurricane season produces 14 named storms, of which seven become hurricanes. This year, there have been nine named storms, and no hurricanes.

It's unclear exactly where Isaias might make landfall. Current models show the center of Isaias coming onshore anywhere from eastern Louisiana to the western Florida Panhandle. Florida Gov. Ron DeSantis declared a state of emergency for 25 counties ahead of the storm.

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