Monday was as about as good as it can get in Atlanta in January.

That’s over.

This will be the last day this week that you will wake up to temperatures above freezing.

“The Jet Stream does the Polar Plunge as a piece of the Polar Vortex drops down to the Great Lakes region,” says WSB meteorologist Kirk Mellish. “The arctic air comes in two parts one by Tuesday night and the next Friday.”

Mellish is calling for a 20 degree temperature change on Tuesday. High temperatures will only reach the mid 40s and that will come earlier in the day. Temperatures will start to fall in the afternoon. Lows will be bottom out in the mid to upper teens.

There is also a wind advisory for all of metro Atlanta from 10 a.m. to 10 p.m. Tuesday from the National Weather Service. Winds this afternoon and evening will be 15-25 mph with gusts up to 40. So that will make it feel much colder and Kirk says "a tree could fall here or there".

Mellish says this polar blast will not be as extreme as what we dealt with a couple of weeks ago, but it will be “longer lasting, with 4 or 5 nights below freezing"

That means it won’t be getting any warmer on Wednesday, despite plenty of sunshine. Look for highs to stay in the upper 30s with lows 21-26.

Thursday might be the coldest night of the week. Look for partly cloudy skies during the day with highs in the upper 30s to low-40s. Overnight lows will drop to 16.

Mellish says the frigid air will stay in place for Friday. Highs will barely make the mid 30s. Things do warm up a little on Saturday with temps moving back into the upper 40s. Lows both nights will be in the low-to-mid 20s.

If it feels like it’s been colder than normal, it has. Mellish says temperatures are already four degrees below normal for the month as a whole.

“Which is a lot, a significant departure from average,” he says.

As for the changes of any snow or ice, check out Mellish's blog post for Monday.