A rainfall warning has been issued for most of southwestern Saskatchewan.

The system moving from Montana is expected to reach Swift Current later today and continue throughout the night and tomorrow.

Terri Lang, a meteorologist with Environment and Climate Change Canada, said the region could receive upwards of 40-50 millimetres of precipitation by Wednesday morning.

"We're looking at some fairly good rainfall amounts coming for a lot of southern Saskatchewan but it looks like the focus this time will be over the southwest part of the province," she said. 

The rainfall warning takes that prediction even further with estimates of up to 75 millimetres in some areas. Shaunavon, Maple Creek, Val Marie, and Cypress Hills are expected to be hit with the brunt of the storm.

"Cypress Hills could be getting into snow again," she said.