Get out the electric blankets and long underwear, because the Mid-Columbia is going to continue getting socked with some serious cold.
Frigid air will mix with breezy conditions to send the mercury far below zero at night this weekend, weather forecasters said.
Emergency preparedness officials and others are urging people to take steps to protect themselves from the deep freeze.
"I would hope that anybody who's been sleeping outside gets wise and comes inside," said Byron Brooks, men's ministry director at the Tri-City Union Gospel Mission in Pasco.
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A large blast of arctic air from Canada descended Friday into the Mid-Columbia, said Ann Adams, an assistant forecaster in the National Weather Service's Pendleton office.
A storm front that had been churning off the coast has pushed inland. Precipitation from the storm didn't hit the Tri-Cities, she said, but its 20 mph winds did.
The result is temperatures in the single digits or just below zero through Sunday night, but wind-chill factors will make it feel like it's as much as minus 13 degrees, Adams said.
"I'd say it's a little bit out of character for this time of year," she said, adding that December highs are usually in the 40s with lows just below freezing.
The temperature fell to 4 degrees Thursday at the Hanford Meteorology Station, setting a new cold record for the date. The Hanford Meteorological Station keeps daily temperature records back to World War II.
The normal low temperature for Dec. 5 is 26 degrees. The previous record for the date was 7 degrees and was set in 1972.
Temperatures will be so cold this weekend that the Downtown Walla Walla Foundation has rescheduled the Macy's Parade of Lights to Dec. 14. Organizers said they didn't want to subject thousands of spectators to such poor weather conditions.
Walla Walla's First Congregational Church has also volunteered to be a warming center for the homeless until 5 p.m. Sunday, said a release from Walla Walla Emergency Management. The church will provide a room with cots and blankets but will not offer meals or showers as a traditional shelter would.
Benton County Emergency Services is encouraging residents to check their home heating systems, wrap water pipes with insulation and disconnect outdoor water hoses.
People should also be careful with space heaters and not use certain heat and energy sources indoors, such as charcoal or wood grills and electric generators because they can produce carbon monoxide, an odorless gas that can kill.
Drivers should fill their gas tanks before extreme cold weather hits and do basic maintenance to avoid car trouble.
Keeping an emergency kit of food, water, warm blankets and clothes is also important, emergency officials said.
Not a lot more people were expected to check into the mission before the weekend, Brooks said, as many of the area's homeless have left the community. There are beds available if there is a need.
Adams said nightly temperatures will be back up in the low 30s by Wednesday. However, another weather system is expected to punch through the region at the end of next week.