BAKERSFIELD, Calif. — UPDATE (11:16 a.m.): Northbound traffic is now being escorted over the Grapevine.

Northbound traffic is now being escorted over the Grapevine. Help us keep it safe by taking it slow .#Grapevine #operationsnowflake

— CHP Fort Tejon (@CHPFortTejon) February 18, 2019

UPDATE (10:34 a.m.): California Highway Patrol says I-5 Northbound is "about to open" after being closed for several hours, starting last night around 6:12 p.m. CHP says they are clearing the last of the ice

Northbound Interstate 5 is about to open. We are clearing the last of the ice. Thank you for your patience. #Grapevine #CHP #FortTejon #snow #YesItSnowsInCalifornia pic.twitter.com/dR3uh5TcTm

— CHP Central Division (@CHPCentralDiv) February 18, 2019

UPDATE (10:10 a.m.): Caltrans says the I-15 is now re-open in both directions.

UPDATE (7:22 a.m.): Fort Tejon CHP tells 23ABC that the Northbound I-5 is open from Castaic to Highway 138. It's not known when the rest of the Northbound I-5 will re-open.

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UPDATE (4:52 a.m.): Fort Tejon CHP tells 23ABC the Northbound I-5 through the Grapevine won't be open until about 7 a.m.

Caltrans had tweeted earlier in the morning that the Northbound I-5 would be open at about 4:45 a.m.

Fort Tejon CHP says roads are still too icy to pass through.

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UPDATE (4:16 a.m.): According to a tweet from Caltrans, the Northbound lanes of I-5 will open up by 4:45 a.m. CHP will be pacing vehicles on the Northbound I-5.

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UPDATE (4 a.m. Monday): The California Highway Patrol has started escorting vehicles on the Southbound I-5 through the Grapevine.

According to the CHP's traffic website, 500 vehicles were being escorted.

The CHP reports that escorts would be moving at 20 miles per hour.

It's not known when the Northbound I-5 will be open.

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According to the California Highway Patrol in Fort Tejon, the I-5 on the Grapevine is closed due to multiple collisions.

The CHP Incident site sit says dozens of vehicles are stuck in the snow and spinning out.

We'll continue to update this as more information becomes available.