Patrons at Augusta National Golf Club didn't need their umbrellas Wednesday, but they might need a jacket by the weekend.

Umbrellas might not be needed at Augusta National this weekend, but a warm sweater will come in handy if the weather forecast is accurate. (Rainier Ehrhardt/Staff)

A cold front is expected to hit by Saturday, leaving high temperatures in the 60s and lows dipping to the 30s.

According to the National Weather Service, Sunday morning's low will be 30 degrees.

"It looks like a chilly start to the tournament Sunday," said Mike Proud, meteorologist with the National Weather Service in West Columbia, S.C. "Of course, this is subject to change as Mother Nature feels necessary."

While fans might have to give up the short sleeves and sundresses, the below-freezing temperatures pose a threat to more than just wardrobes. Some of the picturesque flowers and foliage on the course might be at risk.

A freeze can "affect everything from azaleas to tomatoes," said Bill Adams, a master gardener and program assistant for the University of Georgia extension service in Richmond County.

"For the everyday resident, they need to protect their plants if there's any inkling that it might freeze. That's if they want to keep them," he said. "But a lot of things like azaleas are already in bloom, so that might not be a concern."

Retief Goosen hits from a bunker at the fourth green in the Par-3 Contest. Golfers in short sleeves on Wednesday might be in warmer gear by the weekend. (Annette M. Drowlette/Staff)

Adams suggests residents put a frost cloth over plants they want to keep safe or turn on their sprinklers. The water may freeze, but not the plant. They can even layer on outdoor Christmas lights and leave them turned on during the night to prevent damage.

Officials at Augusta National said they aren't worried about the iconic azaleas at the course. Because the plants are already in full bloom there isn't much concern there will be damage.

That's not the case with another floral focal point.

Although nothing is definite, sources at the course say the signature U.S.-map-shaped pansy patch outside the clubhouse might get a special covering to protect the famous grouping of flowers from frost damage.

Adams said he expects this to be the last freeze of the season, if it happens.

"And if it does happen, I know the people at the course know exactly what to do out there," he said.

Reach Kamille Bostick at (706) 823-3223 or kamille.bostick@augustachronicle.com.