polar air mass


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polar air mass

polar air mass
Polar air mass as it affects the United Kingdom.
That air mass that originates in high latitudes. Polar air masses are of two types—polar maritime and polar continental. The polar continental has its source in continental Eastern Europe, Siberia, and Canada, and it brings very cold weather to the United Kingdom and United States in winter. This air mass is characterized by very cold dry air. Polar maritime air often originates in the Greenland or Gulf of Alaska regions and spreads across the United Kingdom or United States from a northwesterly direction. It is humid and unstable.
References in periodicals archive ?
RAMALLAH, February 28, 2012 (WAFA) - A polar air mass is expected to hit the area Tuesdaynight with rain showers on the northern areas spreading gradually to all areas and westerly to southwesterly winds, according to the Palestine Weather Service.
The polar air mass that hit the Palestinian Territory was the highlight of the three dailies, featuring snow in Hebron and Bethlehem on Saturday and printing pictures of children playing with snow.
RAMALLAH, February 16, 2012 (WAFA) -- A polar air mass hits the Palestinian Territory on Thursday, accompanied with steady rain showers and thunderstorms, according to Palestine Weather Service.