Just a quick update this evening to call attention to a large complex of thunderstorms slowly moving across northwestern Harris County, Waller County, and southwestern Montgomery County. Here, unstable air is combining with tropical moisture to produce very heavy rainfall.

The National Weather Service has issued a flood advisory through 1:30am CT on Tuesday morning, and some areas could see 3 to 5 inches of total rainfall from late Monday through early Tuesday. These rains could cause street flooding and potentially threaten some structures in low-lying areas. The primary concern is that as this system gets closer to the coast, and more tropical moisture, the storms could continue to strengthen.

In terms of motion, the storms seem to be slowly sagging southeastward, and may move deeper into Harris County tonight, possibly toward the central part of the Houston region.

Posted at 10:50pm CT on Monday by Eric