A severe thunderstorm watch has been issued for Parry Sound and Muskoka.
Environment Canada issued the watch just after noon today as conditions are favourable for the development of severe thunderstorms that may be capable of producing strong wind gusts and large hail.
The weather agency says large hail can damage property and cause injury while strong wind gusts can toss loose objects, damage weak buildings, break branches off trees and overturn large vehicles.
Emergency Management Ontario reminds every one that lightning kills and injures Canadians every year and that severe thunderstorms can produce tornadoes.
Everyone is cautioned to be prepared for severe weather and to take cover if threatening weather approaches.