Northbound vehicles approach the chain-up location at Exit 1 on Interstate 5 at the Oregon-California border at 9 a.m. Monday. 

The Oregon Department of Transportation has instituted a “conditional closure” over the Interstate 5 Siskiyou Summit for all lanes as heavy snowfall over the region continues for a second day.

“A conditional closure is in effect on I-5 over the Siskiyou Pass,” ODOT announced in an email around 2:50 p.m. “(This effects) both northbound and southbound traffic. Expect delays. (See) Tripcheck.com for updates and latest conditions.”

ODOT said the interstate is affected from mileposts 1 (Oregon-California border) to 11.

(Updated at 6:52 p.m.)

ODOT: SW Oregon: Interstate 5, mileposts 1-11: I-5 over the Siskiyou Pass is back open northbound and southbound. Winter conditions remain. Chains are required. As a reminder, don’t stop in the roadway, especially in the fast lane, to put on chains. Pull over as far as safely possible to avoid blocking the road for through traffic. See TripCheck.com for more information.

See previous coverage below.