An arctic air mass is expected to further drive into the Copper River Basin, with morning temperatures dropping as low as 40 below zero in lower elevations. Temperatures will remain cold today and map further drop Friday night as the air mass remains over the northern and central Basin. Locations closer to Mentasta Lake and Slana are expected to have a northeast wind develop this evening and through Friday night which will keep ambient temperature near 20 to 25 below zero, but drop wind chill values as low as 40 below to 50 below zero for tonight and Friday night in these areas.
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