Fifteen locations across Trøndelag, a region in central Norway, experienced biting cold Tuesday morning—the lowest temperatures of the autumn season so far. The cold snap was fierce, and snowy, and has signaled an early arrival of winter.

Last winter was exceptionally cold across Scandinavia, with the season culminating in a historic low of -44.3C (-47.7F) at Finland’s Enontekiö airport—the coldest temperature recorded in Fennoscandia.

This extreme chill had wide-ranging impacts , including an unusual influx of waxwings into the UK, resulting in a rare "waxwing winter" as these birds, typically native to colder regions, migrated south in search of food. As Dr. Viola Ross-Smith from the British Trust for Ornithology (BTO) explained, "Waxwings have a so-called irruptive migration which means their autumn and winter movements are largely driven by the need to find sufficient food." Due to a frozen berry crop in Scandinavia, thousands of waxwings traveled south to Britain in late autumn, seemingly preempting the exceptionally cold winter that followed.
https://electroverse.substack.com/p/trndelag-cold-fall-arrives-with-a