The cold snap this week in the Tri-Cities has been a record setter.
The temperature dipped to 15 degrees in Richland Tuesday, beating the previous record cold for the day of 19 degrees in 1990, according to the National Weather Service.
Records go back to 1944.
A record also was set at Hanford, where weather service records go back to 1912 before the area was turned into a nuclear weapons site. The temperature dropped to 11 degrees Tuesday, which beat the previous record for the day of 14 set in 2006.
Temperatures are warming in the Tri-Cities, with highs expected to be near 40 degrees Thursday and Friday and possibly in the low 50s by Sunday.
Lows should be back around freezing by Friday night, according to the weather service.