Southern Manitobans hoping to get outside the day before Labour Day may need to rethink their plans.

Environment Canada predicts Winnipeg could get as much as 20 mm of rain on Sunday. Other communities across the south, including Brandon and Gimli, could get between 10 and 20 mm.

Prairie Barge Festival moves inside

The rain could have an impact on several outdoor activities planned for Sunday.

The Prairie Barge Festival has a number of musicians lined up to play at its outdoor festival at The Forks. A pancake breakfast planned for outside moved into The Forks Market.

"We're still having all of our programming running as usual," said Andraea Sartison, producer of the Barge Festival. "We've just had to move it inside. So, the weather, it's a sad thing for us because the barge has been so beautiful over the last couple of days."

The festival also planed to show the Labour Day Classic football game between the Winnipeg Blue Bombers and the Saskatchewan Roughriders on a large outdoor screen at 3 p.m., but the rain forced that inside as well.

"We were looking forward to the big screen, but it's cool they put it inside," said Adam Logan. "We don't have cable at home, so we wouldn't be watching the game if they didn't have it here."

Sikh festival goes ahead as planned

The weather also put a bit of a damper on an annual Sikh festival.

Music filled the area around the west lawn of the Manitoba legislative grounds.

A couple of thousand members of Winnipeg's Sikh community braved the rain and gathered there to celebrate Khalsa.

The annual parade marks the founding of the faith back in 1699. It's also considered the Sikh New Year.

"We are very happy,” said organizer Nishan Warraich.“You can see the crowd, even though the crowd is not as big as we expected, but I can see the spirit of the people."

Despite the weather, the festivities went through as planned with music, free food and a parade through the city's downtown.

Rain could worsen flooding

Sunday’s rain comes after massive storms dumped as much as 100 mm of water on southern Manitoba on Friday.

The heavy rain caused flash flooding in the towns of Niverville and Steinbach.