SLO County weather forecast for week of Nov. 14: Cooler temperatures and some fog

San Luis Obispo reached 90 degrees on Friday, breaking its previous daily high of 87 degrees set in 1990. Warm, dry, and clear weather will continue through Sunday, then a cooling trend will develop this upcoming week with the return of the marine layer.

Sunday morning’s gusty Santa Lucia winds combined with a strong ridge of high pressure over California will produce clear skies and warm temperatures throughout San Luis Obispo County, with highs ranging between the low to mid-80s, including the beaches. However, Tule fog is likely across the Central Valley.

The ridge of high pressure responsible for the gusty Santa Lucia winds and the warm temperatures will begin to break down as the storm track shifts northward across the Pacific Northwest, allowing temperatures to return to seasonal levels.

The marine layer with areas of fog and mist is expected to develop on Monday along the coastline and will deepen and move into the coastal valleys and a few of the inland valleys by Tuesday with areas of night and morning fog and mist.

Fresh to strong (19 to 31 mph) northwesterly winds will produce mostly clear skies on Tuesday afternoon; however, the marine layer will redevelop by Tuesday night into Friday morning with areas of fog and mist during the overnight.

At this time, the longer-range models do not indicate any rain for Central or Southern California through next week; however, unsettled weather with a chance of rain could develop over the Thanksgiving Day holiday. So far out, confidence is low for this scenario, and details remain unclear.

Surf report

Sunday’s 4- to 6-foot west-northwesterly (285-degree, deep-water) swell (with an 8- to 13-second period) will remain at this level through Tuesday morning.

Increasing northwesterly winds off the California coastline will generate a 6- to 8-foot northwesterly (300-degree, deep-water) sea and swell (with a 5- to 12-second period) on Tuesday afternoon into Wednesday, decreasing to 2 to 4 feet (with an 8- to 11-second period) on Thursday through Friday morning.

A 6- to 8-foot northwesterly (305-degree, deep-water) sea and swell (with a 5- to 11-second period) is forecast on Friday afternoon into Saturday.

A 1- to 2-foot Southern Hemisphere (220-degree, deep-water) swell (with a 15- to 17-second period) will remain at this level through Monday.

Seawater temperatures will range between 54 and 57 degrees through Saturday.

This week’s temperatures

LOWS AND HIGHS, PASO ROBLES

LOWS AND HIGHS, SAN LUIS OBISPO AND COASTAL VALLEYS

PG&E safety tip

Even though its November, warm temperatures are forecast this weekend throughout the Central Coast, including the beaches. Stay hydrated: Keep drinking plenty of water, even if you’re not thirsty. Avoid drinks with caffeine or alcohol.

For more heat safety tips, please visit www.pge.com.

John Lindsey’s is PG&E’s Diablo Canyon marine meteorologist and a media relations representative. Email him at pgeweather@pge.com or follow him on Twitter @PGE_John.