The hatched areas on the National Hurricane Center's tropical outlook map indicate "areas where a tropical cyclone — which could be a tropical depression, tropical storm or hurricane — could develop," said National Hurricane Center Deputy Director Jamie Rhome.

The National Hurricane Center is monitoring Invest 93L off Florida. Chances for development stand at 40% over the last 48 hours.

The National Hurricane Center is monitoring Invest 93L off Florida. Chances for development stand at 40% over the next 48 hours.

The National Hurricane Center is monitoring Invest 93L off Florida. Chances for development stand at 40% over the next 48 hours.

The National Hurricane Center issued a warning for four major U.S. states on Monday morning. Heavy storms could be approaching part of the Gulf Coast this week. There is apparently an area of low localized pressure off of the east coast of Florida that could cause a disturbance later in the week.

The National Hurricane Center is monitoring Invest 93L off Florida. Chances for development stand at 40% over the next 48 hours.

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Invest 93L is taking its time moving across Florida, and it could still become a tropical depression later this week.