Showers and thunderstorms are possible before noon Saturday.
Some may produce small hail, according to the National Weather Service. The storms Saturday morning are not expected to be severe.
Tonight and Sunday, a powerful storm system will move into the area.
Two or three rounds of thunderstorms are possible, beginning as early as sunrise Sunday and lasting into Sunday evening.
The potential exists for strong to severe thunderstorms through the day Sunday with large hail, damaging winds and a few tornadoes.
Significant severe weather, including large hail and strong tornadoes, is possible, but this is still uncertain, the weather service said.