What are driving conditions like on I-5 in late November?

Late November on I-5 can bring storm-related restrictions at the Grapevine in California and near the Oregon border. The three states have different winter tire and chain rules. Check the mountain sections before departure instead of relying on conditions in a nearby city.

Facts checked October 2026. Every number links to its source; prices and rules change, so confirm the day you travel.

Which stretches of I-5 need checking?

Traveling south to north, the Grapevine at Tejon Pass is a California checkpoint for winter weather. Caltrans lists the summit elevation at 4,144 feet. When heavy snow is forecast at 4,500 feet or lower, Caltrans and the California Highway Patrol prepare Operation Snowflake. Under the closure arrangement described by Caltrans, northbound I-5 can be blocked at Lake Hughes Road in Castaic and southbound I-5 at Grapevine Road in Kern County. Check the Grapevine page and Caltrans QuickMap.

Farther north, I-5 runs through the Sacramento River Canyon north of Redding and the Mount Shasta area. A November 2024 storm led authorities to use Fawndale, about 10 miles north of Redding, as a northbound closure point. Edgewood, about 21 miles south of Yreka, was used for a southbound closure.

Near the Oregon line, I-5 crosses Siskiyou Summit. Secondary reference sources list its elevation at about 4,310 feet. ODOT used Ashland at milepost 11 as a southbound closure point during the November 2024 storm. Check the Siskiyou Summit page and Oregon TripCheck for the latest posted status.

In Washington, use WSDOT's current traffic map before leaving for your destination or continuing north.

What chain and tire rules apply in November?

California uses storm-triggered chain-control levels rather than fixed chain-control dates. At R-1, most vehicles must use chains, while qualifying passenger vehicles and light trucks with snow tires on at least two drive wheels may proceed if they carry chains. At R-2, four-wheel-drive or all-wheel-drive vehicles with snow-tread tires on all four wheels are excepted from installed devices but must carry them. R-3 requires chains or approved traction devices for everyone. Studded tires are permitted November 1 through April 30.

Oregon permits studded tires from November 1 through March 31. A sign reading Carry chains or traction tires means the vehicle must have chains or qualifying traction tires in or on it. When chains are required, a vehicle rated at 10,000 pounds gross vehicle weight or less that is not towing may use qualifying traction tires instead. Vehicles that are towing or rated above 10,000 pounds must use chains. Oregon recognizes studded and mountain-snowflake tires as traction tires.

Oregon also has a conditional exception for certain four-wheel-drive or all-wheel-drive passenger vehicles weighing no more than 6,500 pounds unloaded. The driver must carry chains and must not be towing. Other conditions apply. Check Oregon’s chain-law guidance. Washington permits studded tires from November 1 through March 31 and lists a $500 ticket for failing to chain up when signs require it.

What happened during recent late Novembers?

On Wednesday, November 20, 2024, a storm brought snow and strong wind to far Northern California and southern Oregon. Southbound I-5 closed at Ashland milepost 11. Northbound I-5 was closed at Fawndale, and southbound I-5 was closed at Edgewood. Reported causes included whiteouts and fallen trees, along with spun-out vehicles.

During the event, ODOT required chains on all vehicles except qualifying four-wheel-drive and all-wheel-drive vehicles that were not towing. Chains were also required through Mount Shasta. Both directions over Siskiyou Summit and the Mount Shasta section reopened by 9:15 PM that day.

The brief contains one older Thanksgiving example. Caltrans said I-5 closed for extended periods during Thanksgiving 2019 at Tejon Pass because of snow. That event was in 2019, not within the 2021 through 2025 review window. No later Thanksgiving-week Grapevine closure was verified in the brief.

When is Thanksgiving traffic expected?

AAA's national 2025 Thanksgiving forecast projected 81.8 million people traveling at least 50 miles from November 25 through December 1, 2025. At least 73 million were expected to travel by car. These are 2025 national figures, not I-5 counts or a 2026 prediction.

INRIX's 2025 forecast expected congestion on Tuesday from noon to 9 PM and Wednesday from 11 AM to 8 PM, using local metro time. Its Sunday return window was 11 AM to 8 PM. In 2026, Thanksgiving falls on Thursday, November 26. These previous-year congestion windows do not account for a storm restriction at the Grapevine or Siskiyou Summit. Check the updated forecast when available.

Where can I check I-5 conditions before I leave?

For California, use Caltrans QuickMap or the text-only Caltrans road report. Check both the Grapevine and Mount Shasta before departure. MileCheck's California camera page also provides camera links for the state.

For Oregon, use TripCheck and the Oregon camera page. Check Siskiyou chain controls. For Washington, use WSDOT's traffic map and the Washington camera page. The MileCheck I-5 corridor page provides a route overview. Review conditions before leaving. Check again while parked if conditions change.

Related: I-5 cameras and conditions · Live road closures · Chain laws by state · Mountain pass conditions