Arctic Air Mass

Arctic air mass Mass of very cold air in the Arctic regions which invades lower latitudes at irregular intervals.

ARCTIC AIR MASS
An air mass that develops around the Arctic, it is characterized by being cold from surface to great heights. The boundary of this air mass is often defined by the Arctic front, a semi-permanent, semi-continuous feature.

Arctic air masses move about as a shallow area of high pressure, commonly known as an "Arctic High". Northerly winds associated with a cyclone and trailing anticyclone, (the center of the arctic air mass), transport the colder air southward.

Arctic Air Mass
A Index
A daily index of geomagnetic activity derived as the average of the eight 3-hourly a indices.

Arctic Air Mass
NOAA National Weather Service - Cite This Source - This Definition
Browse Related Terms: Air mass, AMS, C AMS, K AMS, WDLY
AAWU - permalink - collapse ...

Arctic Air masses form over the Arctic regions of Siberia, Greenland and North America, at about 60 degs. N. Lat. These air masses are very cold and dry, and bring very cold air over the United States as far south as the Gulf of Mexico and Florida.

Continental arctic air mass - very cold dry air. Siberia.
Air mass thunderstorm - a garden variety storm which causes little if any damage. It occurs a considerable distance from any front.

Continental Arctic Air Mass - an air mass characterized by extremely cold, dry air
Continental Polar Air Mass - an air mass characterized by cold, dry air
Continental Tropical Air Mass - an air mass characterized by warm or hot dry air ...

Continental arctic air mass An air mass characterized by extremely low temperatures and very dry air.
Continental polar air mass An air mass characterized by low temperatures and dry air. Not as cold as arctic air masses.

In the northern winter, high-pressure systems (called Canadian highs or arctic air masses) often migrate to midlatitude regions such as the North American upper Midwest, New England, and northern Europe.

Antarctic Front: Front that develops and persists around the Antarctic Continent, approximately between latitudes 60º and 65ºS, and separates the Antarctic Air Mass from the Maritime Polar Air Mass (Pm) further to the north.

Arctic air is cold aloft and extends to great heights, but the surface temperatures are often higher than those of polar air. For two or three months in summer arctic air masses are shallow and rapidly lose their characteristics as they move ...

Lake effect snows can precipitate as much as 76 inches (193 cm) of light-density snow in 24 hours with fall rates as high as 6 inches (15 cm) per hour. Because winds accompanying arctic air masses generally originate from a southwest to northwest ...

Alberta Clipper- A small, fast-moving low-pressure system that forms in western Canada and travels southeastward into the United States. These storms, which generally bring little precipitation, generally precede an Arctic air mass.

Not as severe as frostbite, this distress is primarily the result of the contraction in the blood vessels near the surface of the skin. The medical term used for this condition is "acrocyanosis." Perhaps in reaction to the arctic air mass this week, ...

See also: Arctic air, Air mass, Arctic, Air, High