Coastal Flood Warning

In force from

Oct 10, 1:51 PM PDT

Until

Oct 11, 3:00 PM PDT

Issued

Oct 9, 2:18 PM PDT

Updated

2 times, last Oct 10, 1:51 PM PDT

Office

Los Angeles/Oxnard, CA

Number

1 of its kind from this office this year

Severity

Severe, Expected, Likely

Where

CA

COASTAL FLOOD WARNING REMAINS IN EFFECT UNTIL 3 PM PDT SUNDAY... ...COASTAL FLOOD ADVISORY IN EFFECT FROM 3 PM SUNDAY TO 2 PM PDT TUESDAY

For Catalina and Santa Barbara Islands, from Los Angeles/Oxnard, CA

What

DAMAGING sea-water coastal flooding is likely through Sunday, especially near the Sunday morning high tide where anticipated tide levels are expected to be around 8 feet. The most likely areas for DAMAGING coastal flooding on Sunday morning will be vulnerable southeast facing beaches, such as Avalon and Pebbly Beach. For all other beaches and harbors, minor to moderate coastal flooding is expected. The most DAMAGING and WIDESPREAD coastal flooding risk along southeast beaches will likely be with the Sunday morning high tide due to the expected combination of very high level tide levels approaching 8 feet (including additive effect of low barometric pressure, high surf of 5 to 8 feet, and light to moderate rainfall.

Where

Catalina and Santa Barbara Islands.

When

For the Coastal Flood Warning, until 3 PM PDT Sunday. For the Coastal Flood Advisory, from 3 PM Sunday to 2 PM PDT Tuesday.

Impacts

Sea-water flooding of beach and harbor roads, parking lots, and walkways is likely, especially around the time of high tide. Isolated damage is likely across southeast facing beaches near Sunday mornings high tide. Significant beach erosion is expected. There is an increased risk for ocean drowning. Rip currents can pull swimmers and surfers out to sea. Large breaking waves can cause injury, wash people off beaches and rocks, and capsize small boats near shore.

Additional details

High tides of around 8 feet are expected on Sunday morning, returning to around 7.5 feet for Monday and Tuesday mornings. Large secondary high tides are also expected each evening.

What to do

Stay off of beaches and coastal walkways, roads, and structures. Do NOT drive around barricades or through water of unknown depth.

For Malibu Coast; Los Angeles County Beaches, from Los Angeles/Oxnard, CA

What

DAMAGING sea-water coastal flooding is likely through Sunday, especially near the Sunday morning high tide where anticipated tide levels are expected to be around 8 feet. The most likely areas for DAMAGING coastal flooding on Sunday morning will be vulnerable south-facing beaches due to the expected combination of very high level tide levels around 8 feet (including additive effect of low barometric pressure and onshore winds gusting to 15 to 25 mph), high surf of 5 to 8 feet, and light to moderate rainfall. For all other beaches, minor to moderate coastal flooding is expected near times of high tide. From Sunday night through Tuesday, there will be the continued threat of at least minor to moderate coastal flooding and elevated surf across Los Angeles county beaches, especially south facing shores. Dangerous rip currents are likely.

Where

Malibu Coast and Los Angeles County Beaches.

When

For the Coastal Flood Warning, until 3 PM PDT Sunday. For the High Surf Advisory, from 6 AM to 10 PM PDT Sunday. For the Coastal Flood Advisory, from 3 PM Sunday to 2 PM PDT Tuesday.

Impacts

For vulnerable south-facing beaches (such as Alamitos Peninsula and Naples in Long Beach as well as Malibu), SIGNIFICANT sea- water flooding will likely DAMAGE coastal structures and beach roadways around the time of high tide, especially the Sunday morning high tide. In addition, significant ponding of water on low-lying beach roadways could make driving difficult. THERE IS GROWING CONFIDENCE THAT THE EXPECTED COASTAL FLOODING IMPACTS ON SUNDAY MORNING FOR VULNERABLE SOUTH FACING BEACHES OF LA COUNTY COULD BE THE MOST SIGNIFICANT WE HAVE SEEN SO FAR THIS SEASON, INCLUDING THOSE SEEN WITH MARIE. For all other beaches and harbors, shallow with minor to moderate sea- water flooding will likely impact beaches and walkways, especially with the Sunday morning high tide which could cause local damage to most vulnerable locations such as Venice. For all beach areas, significant erosion is expected. There is an increased risk for ocean drowning. Dangerous and life- threatening rip currents can pull swimmers and surfers out to sea. Large breaking waves can cause injury, wash people off beaches and rocks, and capsize small boats near shore.

Additional details

High tides of around 8 feet are expected on Sunday morning (nearly 2 feet above astronomical high tide of 6.1 feet), returning to around 7.5 feet for Monday and Tuesday mornings. The projected high tides of around 8 feet for Sunday morning would approach or exceed recent record tide levels for LA county. Large secondary high tides are also expected each evening.

What to do

Follow directions of emergency officials. Stay off of beaches and coastal walkways, roads, and structures. Do NOT drive around barricades or through water of unknown depth.

Remain out of the water due to dangerous surf conditions, or stay near occupied lifeguard towers. Rock jetties can be deadly in such conditions, stay off the rocks.

Places under it Los Angeles, Long Beach, Santa Clarita, Glendale, Lancaster, Palmdale, Pomona, Torrance, Pasadena, East Los Angeles, Downey, West Covina, and 130 more

Read the platesCoastal flood FB-EVT-105Nor'easter FB-EVT-066Moon and tides FB-CLK-003How to read a warning FB-STN-001

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