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Showing results for tags 'Arctic air'.
Good morning this 2020 holiday season. Weather tends to highlight dramatic events. I find the term - use of ARCTIC air far too often here in the northeast USA. I have provided the American Meteorological Society definition of arctic air, and the NWS lesson source regions. I think it would be good for us to review the source region of many of these air masses (and if we know how, use trajectories to locate the source). In essence, I am concerned about the overuse of this term. I myself would probably reserve the use of the term to something like wind driven 20 degrees below normal (and only in winter in the USA). Here in the I84 corridor, i don't think of arctic air til we get wind driven near zero airmass in DJF or maybe the NWS definition of Wind Chill WARNING as it is applied in the USA.. There is no specific definition as I've written in this paragraph but I'd like to see the use of ARCTIC reduced, to where it can be of more value (VERY cold). Your approach and counter concern with this topic- let em rip. arctic air A type of air mass with characteristics developed mostly in winter over arctic surfaces of ice and snow. 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 southward.