The prairies and plains of west central Canada, like those on the plains of the central United States are subject to wide swings of weather. Geographic barriers like mountains and large bodies of water can block or deflect even large-scale weather systems. Ocean temperatures and currents impact the track of storms. The influence of abnormally warm or cold waters, known as El Nino and La Nina, off the west coast of the Americas results in abnormal snow and rainfall patterns across much of the North American continent. Sometimes, as slow-moving storms come toward ocean shorelines, those storms almost bounce a bit off the coast directed away by the friction that winds encounter with landmasses. On the vast open plains of North America, no such impediments exist. That often times manifests itself in temperature extremes not expected at southern and northern latitudes. For example, Texas sees much colder weather than Florida. Canada will often see high temperatures not usually associated with that northern clime at certain times. On March 27, 1980 such and occurrence happened when Winnipeg, Manitoba reached an all-time March record high temperature of 74 degrees.
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