SLO County weather forecast for the week of Sept. 4

Here is this week’s weather forecast by PG&E meteorologist John Lindsey.

The strong high-pressure ridge responsible for the record-breaking temperatures will weaken today, producing cooler temperatures. The remnants of Tropical Storm Lidia will produce southerly winds, increasing the mid- to high-level subtropical clouds, rain showers and a chance of thunderstorms today into Tuesday morning. At this time, the models indicate around a third of an inch of rain for many Central Coast locations over this time frame.

A typical Central Coast weather pattern will return Wednesday into Friday, with increasing northwesterly (onshore) winds, the return of the marine layer and cooler conditions.

Surf report

A 2- to 3-foot northwesterly (315-degree, deep-water) swell (with an 8- to 11-second period) is forecast along our coastline into Tuesday. A 3- to 4-foot northwesterly (320-degree, deep-water)

sea and swell (with a 5- to 16-second period) will develop along our coastline Wednesday, increasing to 4 to 6 feet (with a 5- to 15-second period) Thursday into Saturday.

Tropical Storm Sanvu, a few hundred miles off the coast of Japan, will move northward, becoming extra-tropical as it travels toward the Bering Sea. At this time, the models indicate this cyclone will travel into the Gulf of Alaska, resulting in longer-period swell along the California coastline. If the storm develops as advertised, a 1- to 3-foot northwesterly (285-degree, deep-water) swell (with a 20- to 22-second period) could arrive along our coastline Thursday, increasing to 3 to 5 feet (with an 18- to 20-second period) Friday into Saturday.

Arriving from the Southern Hemisphere: A 1- to 2-foot Southern Hemisphere (200-degree, deep-water) swell (with a 14- to 16-second period) will arrive along our coastline today into Tuesday.

Seawater temperatures will range between 55 and 60 degrees through Tuesday. Seawater temperatures will decrease Wednesday into Friday.

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At PG&E, the safety of our customers and employees is our top priority. Each year in the United States, more than 400 people are struck by lightning. There is no safe place outside in a thunderstorm. Remember, “when thunder roars, go indoors!”

This story was originally published September 3, 2017 at 12:21 PM with the headline "SLO County weather forecast for the week of Sept. 4."