The system has an 80 percent chance of becoming a tropical depression or storm within 48 hours, the center said. If it becomes a storm, it would be named Bill.
Forecast models indicate that the system would stay on a northwest track moving toward the Texas coast and could bring heavy rain to western Louisiana.
On Monday, a hurricane hunter aircraft was investigating of the system, and will help to determine whether the low-level circulation has become any better defined since yesterday. Satellite observations overnight suggest that the low continues to produce tropical-storm-force winds well to the east and northeast of
the center. Upper-level winds are forecast to become more favorable for development while this system moves northwestward across the western Gulf of Mexico.