Climate of Manitoba

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Koppen climate types of Manitoba Manitoba Koppen.svg
Köppen climate types of Manitoba

Because of its location in the centre of the North American continent, the climate of Manitoba is extreme. In general, temperatures and precipitation decrease from south to north, and precipitation also decreases from east to west. Since Manitoba is far removed from the moderating influences of both mountain ranges and large bodies of water, and because of the generally flat landscape in many areas, it is exposed to numerous weather systems throughout the year, including cold Arctic high-pressure air masses that settle in from the northwest, usually during the months of January and February. In the summer, the air masses often come out of the southern United States, as the stronger Azores High ridges into the North American continent, the more warm, humid air is drawn northward from the Gulf of Mexico, generally during the months of July or August.

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General climate

Manitoba is a sunny province; according to Environment Canada, Manitoba ranked first for clearest skies year round. Southern Manitoba has a fairly long frost-free season, consisting of between 120 and 140 days in the Red River Valley. It is also prone to high humidity in the summer months with the extreme of 53.0 °C (127.4 °F) in Carman, which set the highest humidex recorded in Canada. There are three main climatic regions.

The northern sections of the province (including the city of Thompson) fall in the subarctic climate zone (Köppen Dfc). This region features long and extremely cold winters and brief, warm summers with little precipitation. [1] Overnight lows as low as −40 °C (−40 °F) occur on several days each winter, and the temperature may remain below −18 °C (0 °F) for weeks. [1]

Southern Manitoba (including Winnipeg), falls into the humid continental climate zone (Köppen Dfb). Temperatures here are similar to the semi-arid climate zone, but this region is the most humid area in the Prairie Provinces with moderate precipitation. [2]

Southwestern Manitoba, though under the same climate classification as the rest of Southern Manitoba, is closer to the semi-arid interior of Palliser's Triangle, and as such, is drier and more prone to droughts than other parts of southern Manitoba. [3] This area is cold and windy in the winter [3] Summers are generally warm to hot, with low to moderate humidity. [3]

The following table provides the 1971 to 2000 averages for high and low temperatures in July and January, rainfall, snowfall and precipitation for seven cities.

City Region July [4] January [4] Rain (mm) [4] Snow (cm) [4] Prec. (mm) [4]
Winnipeg Winnipeg 26/13 °C (79/55 °F)−13/−20 °C (9/-4 °F)416111514
Portage la Prairie Central Plains 25/13 °C (77/55 °F)−12/−23 °C (10/-9 °F)389125514
Dauphin Parkland 25/12 °C (77/54 °F)−12/−23 °C (10/-9 °F)395129508
Brandon Westman 25/11 °C (77/52 °F)−13/−24 °C (9/-11 °F)373112472
The Pas Northern 23/12 °C (73/54 °F)−16/−26 °C (3/-15 °F)324155443
Thompson Northern 23/9 °C (73/48 °F)−19/−31 °C (-2/-24 °F)348186517
Churchill Northern 17/7 °C (63/46 °F)−23/−31 °C (-9/-24 °F)264191431

Tornadoes

Canada's first Fujita Scale F5 tornado approaching Elie F5 tornado Elie Manitoba 2007.jpg
Canada's first Fujita Scale F5 tornado approaching Elie

Southern parts of the province, located just north of Tornado Alley, experience tornadoes each year, with 15 confirmed touchdowns in 2006. June and July are the most common months for such tornadoes. In 2007, on June 22 and June 23, numerous tornadoes touched down, including an F5 Tornado that devastated parts of Elie (the strongest officially recorded tornado in Canada). [5]

Related Research Articles

<span class="mw-page-title-main">Subarctic climate</span> Climate characterised by long, usually very cold winters, and short, cool summers

The subarctic climate is a continental climate with long, cold winters, and short, warm to cool summers. It is found on large landmasses, often away from the moderating effects of an ocean, generally at latitudes from 50° to 70°N, poleward of the humid continental climates. Subarctic or boreal climates are the source regions for the cold air that affects temperate latitudes to the south in winter. These climates represent Köppen climate classification Dfc, Dwc, Dsc, Dfd, Dwd and Dsd.

<span class="mw-page-title-main">Temperate climate</span> Main climate class

In geography, the temperate climates of Earth occur in the middle latitudes, which span between the tropics and the polar regions of Earth. These zones generally have wider temperature ranges throughout the year and more distinct seasonal changes compared to tropical climates, where such variations are often small and usually only have precipitation changes.

<span class="mw-page-title-main">Geography of Alberta</span> Physical features of the Canadian province

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<span class="mw-page-title-main">Subtropics</span> Geographic and climate zone

The subtropical zones or subtropics are geographical and climate zones to the north and south of the tropics. Geographically part of the temperate zones of both hemispheres, they cover the middle latitudes from 23°26′10.5″ (or 23.43626°) to approximately 35° north and south. The horse latitudes lie within this range.

<span class="mw-page-title-main">Köppen climate classification</span> Climate classification system

The Köppen climate classification is one of the most widely used climate classification systems. It was first published by German-Russian climatologist Wladimir Köppen (1846–1940) in 1884, with several later modifications by Köppen, notably in 1918 and 1936. Later, German climatologist Rudolf Geiger (1894–1981) introduced some changes to the classification system, which is thus sometimes called the Köppen–Geiger climate classification.

<span class="mw-page-title-main">Semi-arid climate</span> Climate with precipitation below potential evapotranspiration

A semi-arid climate, semi-desert climate, or steppe climate is a dry climate sub-type. It is located on regions that receive precipitation below potential evapotranspiration, but not as low as a desert climate. There are different kinds of semi-arid climates, depending on variables such as temperature, and they give rise to different biomes.

<span class="mw-page-title-main">Subarctic</span> Region in the Northern Hemisphere immediately south of the true Arctic

The subarctic zone is a region in the Northern Hemisphere immediately south of the true Arctic, north of humid continental regions and covering much of Alaska, Canada, Iceland, the north of Scandinavia, Siberia, and the Cairngorms. Generally, subarctic regions fall between 50°N and 70°N latitude, depending on local climates. Precipitation is usually low, and vegetation is characteristic of the taiga.

<span class="mw-page-title-main">Humid continental climate</span> Category in the Köppen climate classification system

A humid continental climate is a climatic region defined by Russo-German climatologist Wladimir Köppen in 1900, typified by four distinct seasons and large seasonal temperature differences, with warm to hot summers and cold winters. Precipitation is usually distributed throughout the year but often does have dry seasons. The definition of this climate regarding temperature is as follows: the mean temperature of the coldest month must be below 0 °C (32.0 °F) or −3 °C (26.6 °F) depending on the isotherm, and there must be at least four months whose mean temperatures are at or above 10 °C (50 °F). In addition, the location in question must not be semi-arid or arid. The cooler Dfb, Dwb, and Dsb subtypes are also known as hemiboreal climates.

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In climatology, the term microthermal is used to denote the continental climates of Eurasia and North America.

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<span class="mw-page-title-main">Geography of Manitoba</span>

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<span class="mw-page-title-main">Hokkaido deciduous forests</span> Ecoregion in Hokkaidō, Japan

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References

  1. 1 2 Ritter, Michael E. (2006). "Subarctic Climate". The Physical Environment. Archived from the original on 2008-05-25. Retrieved 2007-08-07.
  2. Ritter, Michael E. (2006). "Humid Continental Climate". The Physical Environment. Archived from the original on 2007-05-30. Retrieved 2007-08-07.
  3. 1 2 3 Ritter, Michael E (2006). "Midlatitude Steppe Climate". The Physical Environment. Archived from the original on 2007-08-22. Retrieved 2007-08-07.
  4. 1 2 3 4 5 "National Climate Data and Information Archive". Environment Canada. Archived from the original on 2009-12-11. Retrieved 2010-09-02.
  5. "Elie Tornado Upgraded to Highest Level on Damage Scale Canada's First Official F5 Tornado". Environment Canada. 2007-09-18. Archived from the original on 2011-07-26. Retrieved 2009-10-28.