A special weather statement has been issued by Environment Canada for parts of southwest Manitoba where thunderstorms are expected to bring heavy rain.

The storms are expected to develop over Montana and North Dakota and spread northward late Wednesday afternoon and evening. The storms are slow moving, which means they will linger and as a result, dump a lot of rain.

Environment Canada said there is the potential for 40-70 millimetres just over a couple of hours in places like Melita, Boissevain and Turtle Mountain Provincial Park.

The storms are expected to then push north and eastward into the southern Red River Valley overnight.

That rain will reach the Winnipeg area Thursday, with showers with thunderstorms expected to begin early in the morning.

The wet weather is likely to last for several days, with a 70 per cent chance of showers on Friday and a 60 per cent chance on Saturday.

The sun and heat are expected to return Sunday and stay around for a few days, bringing along temperatures between 25 C and 27 C.