UPDATE: A severe thunderstorm warning is now in effect for Uxbridge, Beaverton and other areas of North Durham.
A thunderstorm watch is in effect for much of the area, including Durham, York, Kawartha Lakes and Simcoe County.
“Conditions are favourable for the development of dangerous thunderstorms that may be capable of producing strong wind gusts, large hail and torrential rain,” the warnings from Environment Canada read.
That could include localized rainfall accumulations of 50 to 75 mm; isolated hail to quarter-size; isolated wind gusts to 90 km/h and the possibility of isolated funnel clouds.
“The type of funnel clouds possible are generated by weak rotation under rapidly growing clouds or weak thunderstorms. This weak rotation is normally not a danger near the ground. However, there is a chance that this rotation could intensify and become a weak landspout tornado,” the warnings read.
A severe thunderstorm warning is in effect for Newmarket, Georgina and northern parts of York Region.
“Persons in or near this area should be on the lookout for adverse weather conditions and take necessary safety precautions,” it reads.