As spring makes its debut, a flash flood warning is in effect with huge storms expected. With a 100 percent chance for rain for Houston and surrounding areas for Tuesday, forecasters said that the worst of the storms were to hit around morning rush hour. Motorists were encouraged to be prepared for heavy rain that could cause flash flooding. A flash flood watch was in effect early Tuesday morning and lasted till Tuesday afternoon. The storms were expected to blow during most of the daytime hours.