ENVIRONMENT CANADA WARNING: NOBODY Is Ready For What Happens In November...

There is no Environment Canada “warning” about November, but there is a real, historic forecast behind the headlines: the polar vortex is projected to collapse in early November, and if it reverses around November 4, it would be the earliest sudden stratospheric warming on record. Here is what the forecasters actually say, with confirmed facts separated from uncertainty. The European ensemble shows a 96% chance of a wind reversal by November 11, but the impacts at ground level are delayed, uncertain and possibly weaker this early in the season. The Weather Network still favours a mild start to winter across much of Canada, thanks to a historically strong El Niño. The first week of November looks mild in Ontario (17°C in Toronto on Tuesday and Wednesday), damp on the southern Prairies and cool in B.C. #PolarVortex #CanadaWeather #WinterForecast #ElNino #November #WeatherUpdate #EnvironmentCanada #Winter2026