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3B ). This front will impact travel conditions Wednesday afternoon. . 1. . . It combines 650 fill down, rugged Arctic Tech shell fabric and removable Coyote fur to protect from strong wind gusts. · Arctic temperatures continue to warm at more than twice the global mean. . It is defined by the pressure difference between air at mid-latitudes (around 45. Map of winter (December, January and February) surface temperature trends in the northern hemisphere for 1990-2013.