Manitobans cleaning up from Thursday's downpour can expect up to 75 millimetres more rain this weekend, along with strong winds.

A rainfall warning is in effect Saturday for western Manitoba, from Dauphin, Roblin and Riding Mountain National Park through Minnedosa, Neepawa, St. Rose, Melita, Boissevain, Virden, Souris and McCreary.

Those regions can expect 50 to 75 millimetres of rain starting on Saturday evening, thanks to a low pressure system that's developing over the U.S. Great Plains and tracking northward.

There could also be heavy downpours with the weather system, which could cause flash flooding in low-lying areas, according to the weather agency.

Up to 100 millimetres of rain fell in Winnipeg on Thursday evening, flooding basements, businesses and underpasses and sending people onto the streets in canoes and snorkeling gear.

The capital city could see 10 to 20 millimetres of rain on Saturday night.

It's also expected to be a windy weekend. Environment Canada is calling for northeast winds of 40 km/h, gusting up to 60, in the Winnipeg area on Saturday night and Sunday morning.

More rain is in the forecast for Monday, but people should start seeing sunshine again on Tuesday.