Environment Canada says periods of rain will become heavier once again early Saturday morning.
Additional rainfall amounts of 15 to 30 mm are possible by Saturday afternoon.
The higher rainfall amounts are expected over Southwestern Ontario. Rain will end Sunday morning.
Although the ground is generally no longer frozen, it will still have a limited ability to absorb this rainfall. As a result, some ponding of water is possible in low-lying areas.
The rainfall warning criterion of 50 millimetres of rain within 24 hours is not expected to be reached.