A flood watch for the Brazos Valley north of Houston, which began early Wednesday, remains in effect through Thursday evening as more heavy rainfall is expected. Here's what you need to know about conditions for Thursday's commuters,

If storms form on Sunday, they could be severe, with the chance for large hail, wind damage and even an isolated tornado. Check the latest timeline.

The National Weather Service has placed Washington, Grimes, Walker and Trinity Counties under a flood watch through Thursday evening. Other counties may be added based on how rain develops, but the bottom line is that conditions are favorable for heavy rain through at least the next 24-36 hours.