A former tropical disturbance being watched by hurricane forecasters failed to form into a tropical depression before reaching the Louisiana coast, but it still threatens downpours and flash flooding as it marches inland on July 18,

Louisiana and Mississippi are bracing for heavy rains and potentially dangerous flooding as a tropical disturbance moves in. The storm, currently centered just off the Mississippi Gulf Coast, is unlikely to strengthen to a tropical depression.

Its chances for tropical development are less, but rainfall flooding is a threat, regardless, in the lower Mississippi Valley. Here's our latest forecast.