You may have noticed a strange rainbow-coloured halo around the sun today.
The phenomenon is created when light interacts with ice crystals in the atmosphere. The refracting effect will cause a halo around the sun — and it can also happen around the moon at times.
Environment Canada's senior climatologist Dave Phillips says those kinds of halos around the sun or moon are common in this part of the continent, happening roughly 20 to 30 times a year.
And it often means some nasty weather is on the way — usually within 24 to 36 hours.
"Our ancestors used to use that as a way of forecasting the weather," he says. "There's a bit of a weather lore that goes like this, 'when there's a halo around the sun or moon, brings rain upon you real soon.'"
The forecast for Friday calls for showers and thunderstorms in the late morning and early afternoon, followed by clearing.
"With all the satellites and radar and supercomputers...you can observe your surroundings, and it'll tell you what the weather is going to be the next day," Phillips adds.