Snow covered flowers in a bed along the Inner Harbour across from the Fairmont Empress Hotel on Feb. 11. (Don Denton/Black Press)

Greater Victoria residents report hearing ‘thundersnow’ Tuesday night

An Environment Canada meteorologist explains the conditions needed to get thundersnow

Facebook users in Greater Victoria reported hearing thunder Tuesday night.

While “thundersnow” might sound like a made-up word, according to Bobby Sekhon, a meteorologist with Environment and Climate Change Canada, it’s an actual phenomenon.

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“Thundersnow is basically the same phenomena of a thunderstorm that gives you thundershower,” said Sekhon. “However, in this case, the atmosphere is cold enough that you’re going to get snow as the primary precipitation.”

Thundersnow is rare in B.C. According to Sekhon, it’s more common in the Prairies or near the Great Lakes.

“If we see it in B.C., usually these situations are where we have a front move through with cold air behind and a relatively warmer ocean, and basically you can get some shallow convection going enough to give a thunderstorm because the air aloft is cold enough.”

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With the snow accumulating over the past couple days, Islanders may have struggled to hear the thunder.

“The snow acts to suppress the sound of the thunder [so] you might not hear it from as far away,” said Sekhon, “in comparison to the summer thunderstorms where you can often hear [thunder] several kilometres away.”

And just like any good summer storm, thundersnow can lead to lightning as well.


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