Actual high temperatures will only reach the upper teens to around 20 degrees in the Boston area Tuesday, according to Dave Epstein.

The Arctic blast is here! This week (especially early this week), we’re experiencing the coldest air of the season so far. Cold Weather Advisories are in effect through early Tuesday morning, and will likely be extended into Wednesday as well.

A potent surge of Arctic air starts settling in Monday evening as a massive dip in the jet stream pulls in frigid air across the entire eastern half of the country. Temperatures are set to drop as low as 20 degrees below average through Thursday with the highs only reaching the teens and some lows even plunging below zero.

Another arctic cold day with single digits is ahead for the Chicago area. Cold weather advisories remain in effect until 2 p.m. on Tuesday and extreme cold warnings for western suburbs last until noon.

Arctic cold gripped the entire Chicago area Tuesday morning, with “feels-like” temperatures near -30 degrees as extreme cold warnings and cold advisories swept across the region. As of 5:20 a.m., temperatures across Northeastern Illinois were below zero,

A blast of Arctic air is bringing cold weather to New England over the next several days. Wind chill values in the mornings are going to be 0 to 15 below, with the coldest areas across the hillier terrain of Worcester County and the Berkshires.

Monday's high could reach 9 degrees, but wind gusts as high as 25 miles per hour will make the air feel much colder, according to the National Weather Service.

Freezing winds are expected to remain in the area until Wednesday. Monday and Tuesday morning are expected to be the coldest periods of the stretch. Monday's high will be 10 and the low minus 6. Tuesday's high will be 5 and the low minus 1,

Chicago was waking up to a bitter cold morning Monday, with sub-zero temperatures and wind chills as low as -15. And it’s only going to get colder from there, the NBC 5 Storm Team says. “We’re cold all the way around,