Weather

Storm brings SLO County’s largest waves in two years

High tide and huge waves created a super high tide along the coast Friday. The waves reach the bottom of Cayucos Pier, which was closed to the public Friday morning.
High tide and huge waves created a super high tide along the coast Friday. The waves reach the bottom of Cayucos Pier, which was closed to the public Friday morning. ldickinson@thetribunenews.com

A storm front that moved through the Central Coast on Thursday and Friday may have brought modest rainfall, but it also ushered in waves as high as 17 feet, the region’s highest recorded surf since 2013.

That swell activity is expected to decrease by Saturday afternoon, but the National Weather Service said a high surf advisory will remain in place until 5 p.m. Sunday. Both the Pismo Beach and Cayucos piers were closed because of the wave action.

Pacific Gas & Electric Co. meteorologist John Lindsey said the largest waves reached 15 to 17 feet Friday, the result of a very intense low-pressure system out of the Gulf of Alaska that generated hurricane-force winds that blew across the ocean, creating waves nearly 50 feet high about 275 nautical miles off the coast.

A northwesterly swell will drop to 11 to 13 feet with a 14- to 16-second period throughout Saturday, then further decreasing to 8 to 10 feet with a 13- to 15-second period Sunday.

The storm brought an average of about a half-inch of rain to San Luis Obispo County, with locations in Paso Robles and Atascadero reaching 0.80 inches before rain tapered off Friday afternoon.

On Saturday, southeasterly winds are expected to produce cool temperatures in the morning and dry conditions throughout the day, with temperatures reaching a high in the mid-60s.

That will change Sunday, however, with the arrival of an intense cold front and winds reaching 46 mph. About a half-inch of rain is expected Sunday, reaching six-tenths of an inch Monday, when showers continue intermittently throughout the day.

Weather is expected be mild throughout the week before another storm front hits the Central Coast on Dec. 19, when Lindsey says most models predict about an inch of rain, followed by more rain reaching about a half-inch on Dec. 20.

Rainfall totals

Here’s a look at how much rain fell around San Luis Obispo County as of Friday afternoon, according to meteorologist John Lindsey.

Location

Rainfall

Adelaida

0.81"

Arroyo Grande

0.30"

Atascadero

0.24"

Atascadero, Long Valley Ranches

0.80"

Avila Beach

0.56"

Baywood Park

0.53"

Cal Poly

0.59"

Cambria

0.35"

Camp San Luis

0.55"

Cayucos

0.70"

Creston

0.12"

Davis Peak

0.51"

Diablo Canyon

0.50"

Hi Mountain

0.40"

Highway 41 & Toro Creek

0.80"

Hog Canyon

0.12"

Islay Hill

0.40"

Lopez Dam

0.44"

Los Osos

0.43"

Morro Bay

0.44"

Nipomo

0.42"

Oceano

0.20"

Paso Robles airport

0.10"

Pismo Beach

0.43"

Rocky Butte

0.32"

Santa Maria

0.16"

Santa Margarita

0.43"

San Luis Obispo

0.43"

San Simeon

0.16"

Shandon

0.08"

Templeton

0.28"

Vandenberg AFB

0.23"

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