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A lightweight, warm and soft fabric, fleece has some of wool's good qualities. Polar fleece garments are traditionally available in the micro, 100, 200, and 300 variants, where the numbers represent the fleece's weight in grams per square meter (gsm). The heavier fleece are warmer. Fleece can range from being high loft to tightly knit.
Best practice indicates that for extreme conditions, clothing should be layered and loose. Near the core of the body, a soft, wicking layer is best. Wool or silk underwear is preferred. Then, by preference, a knitted layer of wool or synthetic fleece. A massive insulating layer and a windproof layer complete the ensemble. [citation needed]
stopping the wind from penetrating and replacing the layer of warm air close to the body Another important factor is humidity . Water is a better conductor of heat than air, thus if clothes are damp — because of sweat , rain, or immersion — water replaces some or all of the air between the fibres of the clothing, causing thermal loss ...
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A Blue Norther, also known as a Texas Norther, is a fast moving cold front marked by a rapid drop in temperature, strong winds, and dark blue or "black" skies. The cold front originates from the north, hence the "norther", and can send temperatures plummeting by 20 or 30 degrees in merely minutes.
In surface weather analysis, cold fronts are symbolized by a blue line with triangles pointing in the direction of travel. cold wave. Also cold spell and cold snap. A period of weather characterized by excessively low temperatures, which may or may not also be accompanied by changes in humidity. Very cold weather is often only referred to as a ...
A polar climate consists of cool summers and very cold winters (or, in the case of ice cap climates, no real summer at all), which results in treeless tundras, glaciers, or a permanent or semi-permanent layer of ice. It is identified with the letter E in the Köppen climate classification.
Bitterly cold air that originated in Siberia will arrive in the U.S. in the coming days, resulting in dangerously cold wind chills for millions of Americans. Arctic blast from polar vortex to send ...
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