On Tuesday afternoon it was a low in a weakening frontal system covering southern tip of Gulf of Mexico and gradually gained tropical characteristics. It became a 70% chance of tropical formation and may not have much time to develop as it moves slowly northward.
This low has become Debby but has weakened into a TD just before making landfall. The low may become extratropical as it moves back to open Atlantic Ocean.
There doesn't seem much threat to the coastal areas because of the weak nature of the storm.