SLO County weather forecast for the week of Feb. 25

February 24, 2013 

Weather report

A strong, 1,035-millibar Eastern Pacific high is firmly anchored off the California coast. This type of weather pattern is notorious for producing persistent afternoon northwesterly winds and extended periods of dry weather. Another area of high pressure over the Great Basin will continue to produce night and morning northeasterly (Santa Lucia) winds, which will keep the marine layer far out to sea.

Overall, clear and dry conditions with mild afternoons and cool mornings will continue through next week.

The high-pressure ridge responsible for the fair weather will further strengthen Friday through next Sunday for even warmer maximum temperatures. The longer-range surface charts and models are not indicating any rain through the first week of March, if not longer.

Surf report

A series of intense storms will continue to move through the Gulf of Alaska, producing a series of long-period swell events. At the same time, fresh to strong (19 to 31 mph) northwesterly winds during the afternoon hours will continue to produce short-period northwesterly seas.

Today’s 5- to 7-foot northwesterly (310-degree deep-water) sea and swell (with a 7- to 12-second period) will increase to 8 to 10 feet (with a 7- to 20-second period) Tuesday.

This northwesterly (310-degree deep-water) sea and swell will decrease to 7 to 9 feet (with a 7- to 17-second period) Wednesday and will remain at this height and period through Thursday.

A 5- to 7-foot northwesterly (290-degree deep-water) swell (with an 11- to 21-second period) will arrive along our coastline Friday, increasing to 6 to 8 feet (with an 11- to 18-second period) Saturday.

An 8- to 10-foot northwesterly (300-degree deep-water) sea and swell (with a 5- to 15-second period) is expected along our coastline Sunday and Monday.

Seawater temperatures

Seawater temperatures will range between 50 and 52 degrees through Sunday.

John Lindsey’s Weekly Forecast is special to The Tribune. He is a PG&E meteorologist whose Weather Watch column appears in the Local section on Sundays.

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