A rare weather phenomenon strikes southern Ontario again
Thundersnow has struck southern Ontario for a second time this month.
The weather phenomenon takes place when lightning and thunder strike during a snowfall.
CTV News Toronto Weather Anchor Lyndsay Morrison said thunder and lightning has been reported during a sudden snowfall on Wednesday afternoon around downtown Toronto, Burlington, Hamilton, on the QEW toward Niagara, in the Kawarthas, and near Woodstock.
“While thundersnow feels uncommon, it’s certainly not unheard of,” Morrison said.
“What’s unique about this season is that we’ve had two thundersnow events this March where it has happened in the most populated part of our country, so there have been lots of people witnessing it, recording it and reporting it!”
According to the Farmer's Almanac, thunderstorms occur when an air mass becomes so unstable that it overturns violently, usually when drastically different temperatures meet.
Local residents were quick to chronicle the “fast and furious” arrival of the spring snow, paired with a crack of thunder and lightning.
Thundersnow last struck southern Ontario less than a month ago as a major snowstorm hammered the region on March 3.
This time around, on Wednesday, a sharp cold front rushed through Toronto, bringing a “burst of heavy wet snow” after a sunny morning that began to resemble typical spring weather.
Environment Canada issued a weather advisory in Toronto for Wednesday, forecasting one to two centimetres of snow, paired with winds gusting up to 70 km/h.
With files from CTV News Toronto's Abby O'Brien
CTVNews.ca Top Stories
Wildfire smoke from Canada disrupts New York flights
Some flights into the New York City area on Wednesday were delayed and some briefly halted because of reduced visibility from wildfire smoke from Canada.

Trudeau shows no interest in compromising with Meta, Google over online news bill
Prime Minister Justin Trudeau is showing no interest in compromising with Meta and Google over their online news bill that would make tech giants pay for journalism created by others that helps those companies generate revenue.
WATCH | Rate hike 'may be the last straw' for some homeowners: mortgage broker
With the latest hike bringing Canada's key interest rates to levels not seen since 2001, one mortgage broker is warning that it may be 'the last straw' for some homeowners with variable mortgages.
opinion | Eight takeaways from Prince Harry's seven hours on the witness stand
It's been a busy, tumultuous few days for Prince Harry, the Duke of Sussex as he took his place on the witness stand in his trial against the Mirror Group Newspapers. Here are royal commentator Afua Hagan's top takeaways from his two-day grilling.
Bank of Canada ends pause on hikes, raises policy rate by 25 basis points
The Bank of Canada raised its overnight rate by 25 basis points to 4.75 per cent on Wednesday, its first increase since pausing hikes in January.
Wrestling icon The Iron Sheik dead at 81
World Wrestling Entertainment legend The Iron Sheik has died. He was 81.
Have rising home prices driven you to leave Canada? We want to hear from you
The Bank of Canada's latest decision to raise its key interest rate comes at a time when many are struggling to afford their homes. CTVNews.ca wants to hear from people in Canada who are going to great lengths to find affordable housing.
Wildfire smoke blankets Ontario, Quebec, air quality plummets, affects activities
Poor air quality is forecast to persist into the weekend across parts of Ontario, as plumes of wildfire smoke blanket the province and prompt school boards to limit outdoor activities.
Feds looking at options for a national disaster response agency as wildfires rage
The federal government is studying options for creating a new national disaster response agency.