Canada Day Weather Advisory: Warm and Humid, Expect Thunderstorms

Residents of Canada have been advised to brace for a warm and humid weather, possibly with thunderstorms, as the country celebrates its four-day long weekend, Canada Day from June 28 to July 1.

"Nearly all parts of the country have the threat of thunderstorms at some point during the extended long weekend with the exception of coastal B.C. and Nunavut," said Chris Scott, Chief Meteorologist at The Weather Network. "There will also be plenty of warm weather which will have people enjoying the outdoors, so it's critical to be aware of rapidly changing conditions and head inside at the first rumble of thunder."

The week will have plenty of warm weather, however conditions may change quickly by Tuesday. Temperatures across the country will be changeable, but average out to near seasonal.

During the Canada Day weekend (June 28 - July 1), warm and humid weather will surge into much of Eastern Canada from Ontario to Newfoundland. However, the increase in heat and humidity will also bring the threat for showers and thunderstorms from time to time. The Weather Network is monitoring the timing for a transition to cooler weather in Ontario towards the end of the long weekend as that would bring a more widespread threat for rain and thunderstorms.

Southern British Columbia and the Western Prairies will start the weekend cool and unsettled, but the weather will improve as it gets closer to Canada Day. The Eastern Prairies will see a transition from muggy and unsettled weather during the weekend with cooler and drier weather for Canada Day.

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The weather bureau also said the humidex may climb into the 30s.

"Saturday looks like our best day of the weekend," Doug Gillham, a meteorologist with the Weather Netwok, said.

For those planning to spend the long weekend outdoors on picnics or go boating, watch out for developing showers in the afternoon either on Sunday or Monday. "You certainly want to keep an eye to the sky if you're outside or boating," he said.

The weather could also affect whatever fireworks display planned for the celebration.

"We're going to have fireworks on Canada Day; we're just not sure if they are going to be the natural or the scheduled ones," Gillham said.

Fireworks are scheduled as follows:

• Mel Lastman Square starting at 10:15 p.m.
• Ashbridges Bay starting at 9:30 p.m.
• Canada's Wonderland beginning at 10 p.m.