Holiday travelers returning home this weekend could contend with more delays at airports as severe thunderstorms intensify in the South and a parade of atmospheric river-fueled storms slams the West.

DALLAS (AP) — Parts of Texas, Louisiana and Arkansas were under severe weather watches early Friday as the National Weather Service predicted a storm system in the Gulf of Mexico could bring high winds, hail and possible tornadoes to the region.

Possible thunderstorms could bring isolated tornadoes into Saturday night in Tennessee, Texas, Louisiana, and Georgia, according to media forecasting company AccuWeather. It said that showers with thunder and lightning may move toward the Southeast and mid-Atlantic by the weekend’s end.