This article on Climate Central is about sea ice growth. It is saying that warm air limits the growth of sea ice. According to the article, repeated warm air incursions have kept “sea ice area at record low levels for much of the freeze season, and have even contributed to an exceptional cold season retreat.”
“Right now, sea ice levels are at record levels for January, following a record low average in November and a second place finish in December. But whether the bouts of warm air will continue through the remainder of the winter isn’t clear” Julienne Stroeve of the U.S. National Snow & Ice Data Center said.
I think it’s expected to see these kinds of conditions over and over since we have seen that there are not many days below 32°F in New York City this winter.