Rare stretch of humidity sweeps across Atlantic Canada, fuelling storm risk
A multitude of factors are aligning to set up a rare humidity event in Atlantic Canada this week.
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Moisture from the tropics, blocking in the atmosphere and above-average sea surface temperatures will all translate to a prolonged period of high humidex values, also helping to fuel thunderstorm risks in the coming days.
Humidex values in the Maritimes are expected to hover around the low- to mid-30s, while regions in Newfoundland island may be even higher.
Wednesday and beyond
Areas: Atlantic Canada
Timing: Wednesday, plus the heat this week
Weather: The humidity peaks into Wednesday afternoon and evening, with mid-to-high 30 feels-like values spread across all Atlantic provinces. Gander, N.L., may possibly challenge the all-time record of 40.2 back in 1975. Warm Atlantic Ocean waters and persistent southwesterlies will bring little relief to coastal regions.
A cold front is moving through the Maritimes today that will cool temperatures down slightly and remove some of the humidity. There is a chance for some storms to become severe in northwestern New Brunswick, potentially bringing nickel-sized hail and strong wind gusts to the area.
Folks will have to wait until a stronger cold front passes on Friday, changing up the air mass.
For the time being, the atmosphere is holding a ton of moisture and energy, translating to uncomfortable air and heavy downpours within thunderstorms.
Prepare
The risks are greater for young children, pregnant women, older adults, people with chronic illnesses and people working or exercising outdoors.
Reduce your heat risk. Schedule outdoor activities during the coolest parts of the day.
Never leave people or pets inside a parked vehicle.
Residents should prepare to limit exercise and time outdoors, remain hydrated and check in on at-risk loved ones.
Even heading into next week, the cloudy and muggy weather does not let up. Typically we look towards Mother Nature’s natural air conditioning with onshore winds, but the warm Atlantic waters and southwesterlies will offer little relief this time around.
Thumbnail courtesy of Getty Images.
Stay tuned to The Weather Network for the latest forecast updates for Atlantic Canada.
