Weather Watch

SLO County weather forecast for the week of Dec. 16

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

Weather report

This morning’s moderate to fresh (13 to 24 mph) Santa Lucia (northeasterly) winds will be especially gusty around the Estero Bay area along Highway 41 from Morro Bay High School heading toward Atascadero about halfway up the Cuesta Grade, as well as in the coastal canyons and parts of eastern San Luis Obispo, including Cal Poly, San Luis Obispo High School and French Hospital Medical Center.

This afternoon will be fair as a high-pressure ridge peaks in strength over the West Coast.

Today’s maximum temperature is expected to reach 82 in San Luis Obispo, breaking the record of 81 degrees set in 1980.

High temperatures along the beaches and in the coastal valleys will mostly be in the 70s.

Slightly cooler weather will develop Tuesday as the high-pressure ridge begins to break down with gentle (8 to 12 mph) morning Santa Lucia winds switching to onshore by Tuesday afternoon. This condition will likely lead to some marine clouds showing up at the coast and possibly in the coastal valleys by Wednesday morning, with cooler weather forecast for all locations.

A relatively cool low-pressure system will slide south down the spine of the Sierra later Wednesday with a chance for snow across the Sierra on Thursday. The associated cold front is scheduled to pass over the Central Coast on Wednesday night into Thursday morning with light rain showers. At this time, rainfall amounts will range around 0.10 of an inch. Strong to gale-force (25 to 28 mph) northwesterly winds will develop behind the front Thursday.

Fair weather is expected to develop Friday and last through much of Christmas week or longer.

Today's surf report

Increasing northwesterly winds along the California coastline will generate an 8- to 10-foot northwesterly (310-degree, deep-water) sea and swell (with a 7- to 12-second period) Thursday, decreasing to 7 to 9 feet Friday.

An extremely large 955-millibar storm near the international dateline will produce a 5- to 7-foot west-northwesterly (285-degree, deep-water) swell (with a 19- to 21-second period) Saturday into Sunday.

Seawater temperature

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