Alabama's northern counties are under a flood watch as potentially heavy rains move into the state. The National Weather Service says storms crossing into the Tennessee Valley will bring rainfall totals from 1 to 3 inches by Tuesday, as some areas could receive as much as 5 inches of rain. The heaviest precipitation is expected to fall overnight Monday. Forecasters say northeastern Alabama should receive the heaviest rains. The weather service says streams along the Tennessee River will rise because of runoff from the storms.