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Through Great Plains, Grassland and Plain

The prairies in Canada are a biome of temperate grassland and shrubland within the prairie ecoregion of Canada. This ecoregion consists of northern mixed grasslands in Alberta, Saskatchewan, and southern Manitoba, as well as northern short grasslands in southeastern Alberta and southwestern Saskatchewan. The Prairies Ecozone of Canada includes the northern tall grasslands in southern Manitoba and Aspen parkland, which covers central Alberta, central Saskatchewan, and southern Manitoba. The Prairie starts from north of Edmonton and it covers the three provinces in a southward-slanting line east to the Manitoba–Minnesota border. Alberta has the most land classified as prairie, while Manitoba has the least, as the boreal forest begins more southerly in Manitoba than in Alberta.

Main climates

The core climate of the Canadian prairie region is defined as a semi-arid climate and is often based upon the Köppen climate classification system. This type of classification encompasses five main climate types, with several categoric subtypes based on the precipitation pattern of the region. The majority of the prairie provinces experience snowy, fully humid continental climates with cool summers (known as Group D), and subarctic climate, also known as class Dfc on the Köppen climate scale. The southernmost regions of the prairies tend to experience fully humid continental climates with warm summers, Dfb. In parts of southwestern Saskatchewan and southern Alberta in Palliser's Triangle, the climate is drier with greater evapotranspiration, resulting in BSk, cold semi-arid climates.

Precipitation events in the Canadian Prairies are important to study as these locations make up 80% of the country's agricultural production. On average, 454 mm (18 in) of precipitation falls on the prairies each year. Out of the three prairie provinces, Saskatchewan obtains the least amount of precipitation annually (395 mm [16 in]), with Manitoba receiving the most at 486 mm (19 in). Most rainfall typically happens in the summer months such as June and July. With the high humidity of the prairies, tornadoes are likely to occur—marking central Saskatchewan, Alberta and southern Manitoba as high probability areas. Approximately 72% of tornadoes in Canada are seen across the prairies due to the capability of summer thunderstorm precipitation to mechanically mix with the air adjacent to the relatively flat surface of the region.

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