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Three lanes of northbound Interstate 5 were closed Thursday morning for the Washington State Department of Transportation to clear out large icicles from the ceiling of the Convention Center tunnel.

I-90 closed near North Bend after multiple collisions

All lanes were reopened around 10:15 a.m. but WSDOT is still warning drivers that there could be more intermittent closures of northbound lanes until above-freezing temperatures are reached later this week.

UPDATE: There may be intermittent full closures of the northbound I-5 lanes as our crews continue to remove large icicles from the tunnel ceiling under the . Three left lanes remain blocked for now. We do this for your safety, so please slow down and expect delays!

— WSDOT Traffic (@wsdot_traffic)

Drivers are being advised to slow down and expect delays.