Environment Canada is warning Nickelback fans to stay away from the stage during Saturday night's outdoor concert if there is thunder and lightning.

The Canadian rock band will be playing at the Magnetic Hill concert site on Saturday but the weather forecast is suggesting concertgoers may find themselves in a rain storm.

Claude Côté, a meteorologist, said the air is going to warm up Saturday afternoon and evening, the most likely moment for lightning to strike.

"This one is a little bit tricky and it's not black and white, it falls into this grey area. The air mass is unsettled and we're going to see showers and thunderstorms, but it's very difficult to say exactly where in southeast New Brunswick," said Côté.

Côté said the 35,000 expected concert attendees should take precautions, like staying away from the stage and other tall objects, if they see thunder clouds.

"There will be some higher structures around so you don't want to be too close to these structures," he said.

Côté said fans should leave the stands if they hear thunder.

Environment Canada said up to 10 people die and another 160 are injured from lightning strikes each year.

The federal department is promoting a motto Nickelback fans probably don't want to hear:

"If it roars, stay indoors."

This isn't the first time Moncton concertgoers have had to deal with wet weather.

It also rained off and on during last year's U2 concert at Magnetic Hill.