Severe weather threatens to cast a pall over the long-weekend relaxation in Hamilton. 

Environment Canada has issued a severe thunderstorm watch for the city on Saturday afternoon.

“Conditions are favourable for the development of dangerous thunderstorms that may be capable of producing strong wind gusts, large hail and torrential rain,” the federal agency said in statement.

'Stay indoors when a thunderstorm strikes. There isn't a place outside that is safe during a thunderstorm.'—Environment Canada

The risk of a severe thunderstorm and 60 per cent chance of showers will continue into the early evening. Fog patches and an overnight low of 13 C are expected after midnight, Environment Canada said.

Like Saturday, Sunday is set to start off with sunny skies. But again, a mix of sun and cloud and a 60 per cent change of showers are expected to roll in for the afternoon. The thunderstorm risk, Environment Canada says, is set to last into the early evening. A high of 25 C is the forecast for the day.

More showers may be in store for the end of the long weekend. Environment Canada says Hamilton can expect a mix of sun and cloud, a high of 26 C and a 40 per cent chance of showers on Monday. 

Staying safe

In a Saturday statement, Environment Canada warned Ontarians of the safety risks associated with thunderstorms. Rising waters associated with heavy rain can sweep people or even vehicles away, the agency said. Thunderstorms also produce high winds, lightning and sometimes hail, hazards that all have the potential to injure or kill human beings. 

"Take cover immediately if threatening weather approaches," Environment Canada said. "Stay indoors when a thunderstorm strikes. There isn't a place outside that is safe during a thunderstorm."