Record lows were shattered in Billings, Miles City and Sheridan, Wyo., on Saturday.
Billings recorded 21 below zero on Saturday morning, breaking the record of 20 below set in 1997.
Miles City had a reading of 36 below zero, breaking the record of 35 below set on Dec. 7, 1996. The National Weather Service reported it is one of Miles City's top 10 coldest days on record.
Miles City also broke its record cold temperature for Dec. 6 on Friday, reaching 30 below zero at 11:08 p.m. and besting the record of 27 below for that day set in 1972.
The NWS said Saturday night’s low in Miles City would be 28 below zero, which would also break a record for the date.
A temperature of 27 below was recorded in Sheridan, Wyo., on Saturday morning, breaking the previous record for Dec. 7 of 25 below, which was set in 1909, according to the National Weather Service.
Bitter cold continued Saturday with temperatures remaining below zero.
The National Weather Service Hazardous Weather Outlook warned that even light winds of 5 miles per hour will produce wind chills of 20 below zero and colder at times.
Saturday's high temperature was 12 below zero. Wind chill values pushed the temperature to about 35 below zero.
But residents have seen the last of the bitterly cold temperatures for the time being, said Albert Richmond of the NWS’ Billings office, as the Arctic air that has blanketed the area for nearly a week finally begins to weaken. The forecast for Sunday in Billings is 8 degrees above zero, with practically balmy 18-degree temperatures set to occur Monday.
One concern about the warming temperatures is the winds that will accompany the more moderate weather. Richmond said that blowing and drifting snow in the Billings area will be a concern on Sunday night headed into Monday.
By Thursday, temperatures are expected to be above freezing — at 33 degrees. But that trend will be short-lived. On Friday, a back-door cold front will bring temperatures back into the upper 20s, Richmond said.