The National Weather Service issued high surf advisories Thursday morning for Northern California, with 20-to-30-foot waves expected through Sunday.

A powerful storm pummeling the West Coast churned up waves as high as 60 feet, killing one man, sweeping another out to sea and prompting multiple rescues when a pier collapsed in Santa Cruz, California,

The storm was expected to bring hurricane-force winds and waves up to 60 feet as it gained strength from California to the Pacific Northwest.

Officials are forecasting weather with moderate risk levels to continue this week for Southern California’s coastal and inland regions. The National Weather Service predicts that large seas and high surf with chances for strong rip currents and minor coastal flooding will continue through Friday for Los Angeles,