The National Hurricane Center is monitoring three areas of possible tropical development.
None are currently threats to the Gulf of Mexico.
Two are off the East Coast.
"Showers and thunderstorms have increased in association with a non-tropical area of low pressure located a few hundred miles east
of the North Carolina coast," federal forecasters advised.
They expect it will become Dexter tomorrow.
"Environmental conditions are conducive for this system to acquire additional tropical characteristics, and a tropical storm is likely to form by Monday."
It is heading away from land.
Much further out in the Atlantic a tropical wave is forecast to move off the west coast of Africa by late Monday.
"Thereafter, some gradual development of the wave is possible, and a tropical depression could form late this week while it moves generally west-northwestward across the central tropical Atlantic."
Closer to the US, an area of low pressure could form in a couple of days a few hundred miles southeast of the Carolinas.
"Some gradual development of this system is possible by midweek as the system drifts to the northwest."
