The wind chill index in the central Montana town of Jordan dipped as low as minus 58 early Monday while Wolf Point was minus 56 and Glendive and Terry were minus 54.
New Year's Day will be sunny with highs in the low 20s but it will feel between 5º-10º most of the day.
With the Arctic air in place, there are both hard freeze and wind chill warnings tonight. Factor in wind chills, feel-like temperatures will be well below zero tonight. Thursday will be cloudy and breezy with highs in the upper 20s and low 30s.
The record low for Tuesday morning is 12 below zero set in 1887 and we may tie that record as well.
CES 2018: LG showcases 88-inches OLED display with an 8K resolution
The upside is that, while LCD panels have extra weight thanks to the backlighting units, the OLED equivalent is far lighter. The show starts on 9 January, with press conferences and coverage to be found on Pocket-lint from a few days beforehand.
The cold wind chills will cause frostbite and hypothermia symptoms in as little as 30 minutes. This means lows will also drop to between 10 and 20 degrees Monday night. Make sure you wear a hat and gloves.$$.
It'll be even colder for the first day of 2018, but before we get there.... We may warm above the freezing mark Sunday.
A wind chill warning remains in effect until noon today and a wind chill advisory remains in effect from 7 p.m. tonight to 11 a.m. Tuesday.
Impressive December cold outbreak: It's not hard to quantify how anomalously long and potent the almost nationwide cold spell has been over the past week.