Canadian weather

摘要

In late November last year, Environment Canada's winter forecasts projected a colder-than-normal winter season for most of southern Canada. This prediction was based in part on a persistent La Nina phase of cooler surface water in the tropical Pacific Ocean. rnThe Pacific El Nino Southern Oscillation (commonly known as ENSO) often has pronounced effects on the Canadian winter, but its influence is less in other seasons. The warm El Nino phase often features storm tracks in central and northern Canada, whereas La Nina tends to have storm tracks in more southerly latitudes and even in the northern American states.