Environment Canada says frost will be a concern until the middle of next week thanks to a Colorado low and a cold front from the north.
A low pressure system bringing scattered thunderstorms into Southwest Manitoba Saturday morning is expected to meet a strong cold front coming south from the territories on Sunday.
Environment Canada says rain will become heavier on Saturday night and strong north winds will turn rain to snow later on Sunday.
The entire southern half of Manitoba is under the warning, including the Parkland.