• Prolonged atmospheric river brings Flood Watch and high avalanche danger to British Columbia as some areas face up to 400 mm (15.7 inches) of rain

    ByTeo Blašković

    A prolonged atmospheric river is affecting British Columbia this week, with Flood Watch, multiple rainfall warnings, and Special Weather Statements in effect across parts of the province. Some coastal areas could receive up to 400 mm (15.7 inches) of rain, while heavy rain on existing snowpack is increasing the risk of flooding, washouts, landslides and dangerous avalanche conditions.

  • Canada records lowest temperature in decades and record snowfall in winter 2025–26

    ByReet Kaur

    Canada recorded its lowest temperature in decades during winter 2025–26, with −55.7°C (−68°F) measured at Braeburn, Yukon, on December 23. Seasonal snowfall reached 446 cm (176 inches) in Gander West, Newfoundland and Labrador, among the highest totals reported nationwide this winter, while Toronto registered its snowiest single day on record on January 25, when 46 cm (18 inches) fell at Toronto Pearson International Airport. The season, spanning December 1, 2025, through February 28, 2026, saw a 76.7°C (138°F) national temperature range, repeated Arctic air outbreaks, and major winter storms that disrupted transportation across central and eastern Canada.

  • Polar vortex split to impact Northern Hemisphere weather in March 2026

    ByRishav Kothari

    Another warming of the Arctic stratosphere is now underway, with the polar vortex forecast to undergo a final split in March 2026. The zonal mean wind reversal around 60°N and 10 hPa is expected between February 28 and March 1, with its impacts propagating into the troposphere, likely shifting weather patterns over Europe and North America.

  • Series of multi-vehicle collisions shut down parts of Highway 401 in Ontario

    ByReet Kaur

    A series of multi-vehicle collisions involving about 50 vehicles shut down sections of Highway 401 in eastern Ontario, Canada, on the morning of January 27, 2026, according to the Ontario Provincial Police. The crashes occurred near Trenton in Quinte West, forcing a full closure of the highway in both directions as emergency crews responded.

  • Toronto Pearson sets all-time daily snowfall record as January 2026 becomes snowiest month since records began, Canada

    ByTeo Blašković

    A powerful winter storm delivered record-breaking snowfall across Toronto, Ontario, Canada, on January 25, 2026, with 46 cm (18.1 inches) measured at Toronto Pearson International Airport as of 05:00 LT on January 26. This marks the highest single-day snowfall recorded since observations at the airport began in 1937. The event established new daily and monthly records for the site and caused widespread disruption across the Greater Toronto Area.

  • Stratospheric warming developing over the Arctic forecast to weaken the polar vortex and influence February weather

    ByRishav Kothari

    Meteorological forecasts show a major sudden stratospheric warming event forming over the Arctic, likely to cause significant weakening of the polar vortex in early February 2026. The resulting atmospheric disruption may alter jet-stream dynamics and increase the risk of Arctic air intrusions into North America and northern Europe during the second half of February.

  • Major polar vortex disruption brings Arctic surges across North America and Europe through January and early February

    ByRishav Kothari

    A major polar vortex disruption has begun and is forecast to send Arctic air into much of North America and Europe through mid and late January 2026. The event will bring freezing temperatures and winter weather as the vortex weakens following a stratospheric warming episode. A second, stronger outbreak is forecast to occur during the last part of January as the core of the vortex splits into two halves, each driving cold Arctic air into Europe and North America in February.

  • Rapidly intensifying winter storm to strike Ontario with snow, ice, and high winds

    ByRishav Kothari

    A powerful bomb cyclone is forecast to strike Ontario bringing heavy snow, freezing rain, and severe winds from Sunday through Tuesday, December 28 to 30, 2025, as the deepening low crosses the Great Lakes. Environment and Climate Change Canada has issued Winter Storm and Freezing Rain Warnings, with snowfall totals of up to 50 cm (20 inches) and gusts exceeding 100 km/h (62 mph) expected in some areas.