* WHAT...Increased threat of sneaker waves and dangerous set behavior expected.
* WHERE...Coastal Del Norte, Northern Coastal Humboldt, Southwestern Humboldt and Coastal Mendocino Counties.
* WHEN...From Thursday evening through Friday evening.
* IMPACTS...Large, unexpected waves can sweep across the beach without warning, sweeping people into the sea from rocks, jetties, and beaches. AVOID ROCKS AND JETTIES. These sneaker waves can also move large objects such as logs, crushing anyone caught underneath.