Colder air is returning to the central and eastern U.S. as the polar vortex becomes more active, bringing fluctuating ...

These open-source MMM tools solve different measurement problems, from budget optimization to forecasting and preprocessing.

December football often means playing in the elements, and while we got a bit of a taste of that in Week 14 -- Josh Allen dashing through the snow in the Bills' thrilling win over the Bengals comes to ...

A weakened polar vortex is expected to bring extremely cold Arctic air to the central and eastern U.S. Temperatures in parts of Minnesota are forecast to drop as low as –26°F over the weekend. The ...

A disruptive polar vortex is set to usher in three successive waves of Arctic air across the central and eastern United States through mid-December, bringing dangerously low temperatures and the ...

A polar vortex system is expected to bring two or more cold waves to Florida this week. Temperatures in North Florida could drop into the upper 20s, with a chance of frost or freeze. Central and South ...

A polar vortex system is expected to bring two or more cold waves to Florida this week. Forecasters predict a chance for frost or a freeze as far south as central Florida late in the week.

Just a few days into December, an arctic air mass has swept into the United States, bringing subzero morning lows and daytime highs stuck in the teens for 30 million Americans in the Northern Plains, ...

The polar vortex has broken, and severe temperatures are set to dominate most of the country in the coming days. Temperatures in the 10s are forecast for much of the Northeast, and subzero ...

A polar vortex will bring arctic air and subzero temperatures to parts of the U.S. through the middle of the month, according to AccuWeather. This first of three likely rounds will impact the U.S.

The polar vortex is so back, and in some parts of the country, the weather system will bring with it up to a foot of snow. If “polar vortex” is giving you déjà vu, that’s because we’ve heard it before ...