Kingston is poised to break a weather record overnight, according to Environment Canada.
Temperatures are forecasted to hit a low of -4 C.
The current record for low temperature recorded at the Kingston Airport on May 13 is 0.7 C, set in both 2010 and in 1994.
The current record-low temperature recorded at Queen’s University is -1.7 C, set in 1946.
Tuesday night’s chilly temperature may come close to the coldest May day in Kingston’s history.
Environment Canada says a temperature of -5 C was recorded at the Kingston Pumping Station on May 2, 1978.
According to Global News meteorologist Ross Hull, the unusual winter-like weather across Ontario, also seen over the last weekend, is being caused by an all-too-familiar weather pattern: the polar vortex.
“This circulating area of extremely cold air stayed put over the Arctic during most of winter and early spring but thanks to a change in the jet stream pattern — it has made a late season visit to southern Ontario!”
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