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Snow dusts a plant near the State Capitol during a "Sneaux Day", Friday, December 8, 2017, in Baton Rouge, La.

The arctic blast has arrived as promised in south Louisiana.

Baton Rouge Metro Airport recorded a low of 22 early Monday morning, falling short of the record of 19 set Jan. 1 in 1984. In New Orleans, Armstrong International Airport recorded a low of 28; the record is 21, also set in 1984.

But if you thought it was cold New Year's morning, just wait until late tonight/early Tuesday morning. The National Weather Service projects a low of 17 in Baton Rouge and 22 in New Orleans.

The record low for Jan. 2 in Baton Rouge is 20 (set in 1979) and 25 in New Orleans (set in 1984).

Freeze warnings and wind chills advisories are in effect throughout various points of Monday and Tuesday for the Baton Rouge and New Orleans areas.

The cold will stick around for a while too. Temperatures won't get above 60s in south Louisiana until Sunday.

“The whole week is going to be very, very cold,” said Phil Grigsby, a meteorologist from the National Weather Service in New Orleans.

The four-day cold period is anticipated to be the longest enduring cold event since January 2010.