"Southerly flow aloft will push a series of weather systems north over Northern Alaska through the weekend. This will bring temperatures to well above normal through Thu along with Chinook wind conditions in the SE Interior of Alaska. This will also bring above normal temperatures and periods of light snow to the remainder of northern Alaska through the weekend." Temperatures are expected to rise today to the single digits above zero in the valley and teens to low twenties in the hills.
According to the NWS, a chinook occurs when strong south winds over the Alaska Range block moisture to areas north of the mountains while warming up the air as it descends on the leeward side of the range due to adiabatic heating. While it may not seem like temps. in the single digits are warm, just a few days ago it was forty below and it hadn't been above zero for about a week.