Heavy rain is likely for Sunday in Southwestern Ontario, with a mix of sun and cloud elsewhere. It will be a cooler day compared to conditions earlier this week.
Rain and thunderstorms tomorrow are likely to produce torrential downpours and will be slow moving at times, and may become stationary. This is expected to lead to localized flooding, which may pose an issue with travel conditions. The exact locations remain uncertain at this time. Rainfall amounts near 100 millimetres may be possible.
The new week is expected to bring some quieter and more comfortable conditions to the region compared to this week.
Temperatures in yellow represent forecasted Humidex values.