Arctic Blast 2: How low will temperatures go - and will it snow?

EUGENE, Ore. - How low will it go?

Temperatures are forecast to plummet, with lows in the Willamette Valley in the teens - or even lower - possible later this week.

"There is still uncertainty on how cold it will get, but inland valleys are likely to experience nighttime temperatures as low as 10 degrees later in the week," National Weather Service forecasters said.

The cold air starts to arrive Tuesday. Temperatures will likely plunge Wednesday through Friday.

The wind chill will likely make temperatures feel even colder, forecasters said.

And while moisture isn't in the immediate forecast, a system forecast to arrive Saturday could bring snow, sleet or freezing rain to parts of Oregon.

"Confidence is low on the specifics at this time," forecasters said. "Stay tuned to the latest forecasts."

In December, a blast of cold air delivered record-cold temperatures and snow that stuck around for a week, closing schools and disrupting commerce.

Warming Shelters to Open

Egan Warming Centers planned to open shelters in Springfield at the 7th Day Adventist Church, 1630 12th Street, on Monday, Tuesday, Thursday and Friday, if necessary.

A shelter at the Catholic Community Services Site will open Wednesday.

In the River Road area, a shelter will open at Trinity United on Monday, Tuesday and Wednesday; will not open Thursday; and will open Friday at Dayspring.

Egan volunteers plan to open shelters at First Christian, Hosea and Valley Covenant every night this week.