This was from The Washington Post:
During the month the jet stream, a strong high-altitude wind that guides weather fronts from west to east, stayed unusually far to the north, keeping the coldest air in Canada and Alaska, the agency said.
Keeping that cold air to the north allowed mild Pacific air to moderate temperatures across the contiguous states, leading to the warm conditions.
However, the jet stream is now sliding into a more typical winter pattern, according to the Climate Prediction Center. The February outlook calls for below-normal temperatures in the mid-Atlantic, the Southeast and intermountain West, and above-normal temperatures in the Southwest, the northern Plains and Alaska.
At least people did save on their heating bill this winter. I'm not looking forward to summer here in Central Texas. It's been warm enough during the winter, so I can just imagine waking up in the morning in June to 80 degree temps