A Weather Impact Alert has been issued for Houston this weekend — and the timing could affect a lot of plans. Here’s when storms may arrive.

The Latest: After record rainfall, North Texas could see more severe storms Thursday. When could rain return? Wednesday is the first day of a series of rainstorms, and it brought a series of severe weather threats,

The threat for flooding will also increase, forecasters warn.

In these instances, when warm, unstable air underneath the cap breaks through the cap, thunderstorms form very rapidly in the atmosphere and can quickly become severe. Energy has been brewing underneath the cap for some time, so when it breaks, thunderstorms can become quite strong -- and very quickly at that.

According to the latest forecast from the National Weather Service, the risk for severe weather Friday has shifted north of Austin and out of the greater San Antonio region. The most severe weather threat of the weekend, however, arrives Saturday. Virtually all of the South-Central Texas region faces a Level 2 out of 5 risk of severe storms.

Officials say a mother and daughter were killed as multiple tornadoes crossed northwest Oklahoma. More severe weather is expected Friday.

DALLAS — Stay informed by watching regular forecast updates and live radar from across the region on our smart TV streaming app, WFAA+. You can also download the WFAA mobile app for up-to-the-minute alerts from our weather team as they come.

Powerful thunderstorms bringing tornadoes, giant hail and damaging winds are erupting across parts of the country. We’re tracking the latest developments and impacts as they happen.