A frigid first half of the week will be followed by warming and a chance of snow, according to the National Weather Service.
Sunday temperatures were higher as an arctic front left the area, prior to another front coming early in the week, said Zack Hargrove, a meteorologist with the National Weather Service in Bismarck. Expect minus 13 degree temperatures on Monday with a high of just minus 10, he said.
“It’s going to get pretty cold pretty quickly behind this front,” Hargrove said.
Monday night temperatures could drop to minus 23 with a wind chill as low as minus 40, he said. Tuesday’s high will be near 1 degree, with a low temperature around minus 5.
“It’s going to be frigid and even colder Tuesday morning,” Hargrove said. “It could be in the negative 20s and a low of minus 24 is possible.”
The winds throughout the cold snap should be relatively light, but there will still be wind chill factors as low as minus 40 degrees, he said.
Temperatures should begin to rise on Wednesday with a high around 20 degrees, he said. Expect around 31 degrees on Thursday and 32 degrees on Friday, before temperatures drop to a high of 22 degrees on Saturday with a 30 percent chance of snow.
It is difficult to accurately predict precipitation levels seven days out, Hargrove said. Seven days prior to Sunday the models were predicting up to 6 inches of snow for the Jamestown area, but three days out it was clear it would not be measurable snow, he said.
“We are always cautious talking about precipitation that far in advance,” Hargrove said.
A trough coming from the West Coast is usually associated with higher precipitation and that shows a chance of measurable snow for the Jamestown area on Saturday, he said. A more precise prediction will be made at midweek, he said.
“Whether it will be just another dusting or a measurable accumulation is impossible to say right now,” Hargrove said.
Average temperatures for Jamestown over the past month are 4.7 degrees below normal, he said. There were two days with highs in double negative digits and five consecutive days of below zero high temperatures, he said.
“January is already pretty cold and looking like a departure from normal,” Hargrove said. “It has definitely been a colder January than usual but I would not say that it is abnormal.”