Official

Coastal Flood Warning issued December 23 at 2:00AM PST until December 24 at 12:00PM PST by NWS San Francisco CA

* WHAT…For the Coastal Flood Warning, significant coastal
flooding expected. For the High Surf Warning, dangerously
large breaking waves of 30 to 35 feet, including breakers up
to 40 feet at favored spots such as Mavericks.

* WHERE…San Francisco, Coastal North Bay Including Point Reyes
National Seashore, San Francisco Peninsula Coast, Northern
Monterey Bay, Southern Monterey Bay and the Big Sur Coast.

* WHEN…Until noon PST Tuesday.

* IMPACTS…Life-threatening swimming and surfing conditions and
significant shoreline erosion can be expected. Numerous roads
may be closed, and some critical infrastructure will be
inundated. Large waves can sweep across the beach without
warning, pulling people into the sea from rocks, jetties and
beaches. Sudden immersion in cold water can result in cold
water shock even for the most experienced swimmers. Cold water
shock can result in dramatic changes in breathing, heart rate
and blood pressure, greatly increasing the risk of drowning in
rough open waters.

StormPrep

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