FOX 32 NEWS - There was lots of noise in the skies over Chicago Friday, courtesy of the Air Force Thunderbirds.
But there were also booms of thunder from Mother Nature, and that could cause some problems for this weekend's Air and Water Show.
Friday was practice day for the Air and Water Show, which has become a Friday tradition for thousands.
"We kind of wanted to miss the crowds and see if it's the same experience. We're enjoying it so far,” a woman said.
"It's missing the announcer, but everything else is still here except the crowd,” a man said.
But this year, the Air and Water Show concern is water.
Buckets of rain delayed the start of today's practice and thunderstorms prompted a beach evacuation, and Saturday’s forecast is a wet one as well.
"Tomorrow we'll just have to keep an eye on the weather. We'll have a few windows, an opportunity. Hopefully it'll hold for a few hours and we'll get a good show in,” said show manager John Trick.
Trick says they've built some flexibility into the schedule and can hold or slide some of the attractions through the course of the day.
The biggest attraction - and the noisiest - the Air Force Thunderbirds will be able to perform as long as there's at least five miles visibility.
"We have three shows we can choose from depending on what the weather is. So we just need 2000 feet for our flat show. 3500 feet for our low show and 8500 feet for our high show. So I think we'll be able to do one of them,” said Major Kevin Walsh.
Although weather could present some problems, organizers say they're still expecting big crowds this weekend, upwards of a total of a million and a half people for both shows.