(AP) – The National Weather Service says strong winds and hail are now expected in the South this weekend, with tornadoes possible across the region.

Forecasters say twisters are possible Saturday in parts of Louisiana, Mississippi, Alabama, Arkansas and eastern Texas, and then Sunday in Georgia.

The weather service’s office in Birmingham, Alabama, is advising church pastors to watch the weather during Sunday services, warning that large rooms like sanctuaries and auditoriums aren’t safe during severe weather.

“Even a weak tornado that hits the right location can still be pretty devastating,” forecaster Adam Baker said.

A series of tornadoes on Palm Sunday in 1994 killed 40 people in Georgia and Alabama, and injured hundreds more. Half the deaths occurred when a tornado struck a rural Alabama church during services, causing the roof to collapse, according to a report about the damage by U.S. weather officials.

Gusty winds and hail are also expected across the region.

National Weather Service forecaster Greg Gust said a low pressure system in the southwest U.S. created two separate “chunks of energy.” He said one hit the Midwest and other will hit the South in a “one-two punch.”

“It is part of the same one-two punch that has accompanied the storms over the past few months,” Gust said. “An upper cut followed by a hook.”