Unusually warm winter conditions in the Arctic during the years of 2015–2016 attracted the attention of many researchers (Boisvert et al., 2016; Cullather et al., 2016; Woods and Caballero, 2016; Alexeev et al., 2017; Graham et al., 2017; Kim et al., 2017; Kim and Kim, 2017; Ricker et al., 2017) and stimulated investigation of the role of atmospheric heat and moisture transport to the Arctic. Anomalous warming and moisture transport were explained by the intrusion of the powerful cyclonic vortex from the North Atlantic, when the moist and warm air masses were contributing to an increase of downwards longwave radiation (DLR; Ghatak and Miller, 2013;