A severe thunderstorm watch is in effect Bracebridge, Gravenhurst, Port Carling, and Port Severn.

Environment Canada says the conditions are right for thunderstorms to possible form.

The agency says given the high heat and humidity a few of these thunderstorms could be intense resulting in localized torrential downpours. These thunderstorms are expected to be slow moving, thus some locations could receive on the order of 25 to 50 mm of rain over a short period of time. There have also been reports of localized wind gusts near 90 km/h.

The My Muskoka Now Newsroom is keeping an eye on things and will keep you updated.