Temperatures dropped below minus 40 in two northern Colorado towns Tuesday morning during the worst hours of the four-day arctic blast that hit the state over the weekend. National Weather Service meteorologists said the towns could have been the coldest places in the country this morning,

Here are the lowest temperatures across Colorado on Tuesday morning, according to the National Weather Service.

Temperatures will hover in the single digits above and below zero across the Front Range and Eastern Plains, but overnight wind chills will make it feel as cold as minus 30.

Chances for snow will start in Denver around sunset, but snowfall will be more likely to start between 7 and 9 p.m. Sunday, forecasters said.

By this afternoon, temperatures in the Denver metro will be around the low to mid-30s, with some areas nearing 40 degrees.

Are the lights looking sparklier than usual? Don’t worry, your eyes are working fine and you are actually experiencing a weather phenomenon caused by ice. The U.S. National

Frigid temperatures are expected to persist in Colorado Springs through Martin Luther King Jr. Day, with subzero overnight lows on Sunday and Monday, but the region should get a respite

For the first time since Friday evening, temperatures in the Denver area will rise above freezing, according to the National Weather Service. Temperatures are expected to hit 34 degrees around noon and peak at 40 degrees around 3 p.

Cold Weather Advisories and Extreme Cold Warnings will be active for southern Colorado over the next 24 hours. A Cold Weather Advisory is active until 5:00 PM Monday and will be upgraded to an Extreme Cold Warning until 11:00 AM Tuesday.

Here is what is and isn't a polar vortex when Colorado receives cold like what is forecast for the holiday weekend.

Monday (Martin Luther King Day): A 40% chance of snow, mainly before 2 p.m. Mostly cloudy and cold, with a high near 6. Wind chill values between -10 and -20. North wind 5 to 10 mph becoming east-southeast in the afternoon.