SLO County weather forecast for the week of Feb. 24

pgeweather@pge.comFebruary 23, 2014 

SLO County temperatures for the week of Feb. 24

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

Gentle to moderate (8- to 18-mph) southwesterly winds today through Tuesday will allow the marine layer to develop along the coast. This condition will produce marine low clouds, fog and areas of drizzle during the night and morning hours, as well as cooler daytime highs.

Today’s charts and models are indicating big changes in the weather pattern, as a couple of vigorous low-pressure systems are on track to bring rain and gale-force southerly winds to the San Luis Obispo County.

A cold front will move over San Luis Obispo County later Wednesday with strong to gale-force (25- to 38-mph) southeasterly winds and rain. Rainfall amounts Wednesday should range between one-third and 1 inch of rain. Snow levels in the Sierra Wednesday night will range between 4,500 and 6,000 feet, with more than a foot of snow possible above 6,000 feet by Thursday morning.

Gentle to moderate (8- to 18-mph) southerly winds and scattered rain showers are forecast Thursday. Total rainfall amounts Thursday should remain below a quarter of an inch.

An intense low-pressure system is forecast to slam into the Central Coast on Friday. This looks similar to the Feb. 3, 1998, system that produced southerly winds of more than 60 mph along the coastline. If the storm develops as advertised, we can expect moderate gale-force to fresh gale-force (32- to 46-mph) sustained southeasterly winds with gusts to 55 mph along the coast.

Periods of heavy rain associated with this low-pressure system will persist through the day
Friday, with total rainfall amounts ranging between 1 and 2-plus inches. Heavy snow is expected in the Sierra on Friday night.

San Luis Obispo County hasn’t seen southeasterly winds of this strength in years. These winds could break tree limbs and cause power outages. To prepare for power outages that may affect you, and learn how PG&E is responding, please visit www.pge.com.

Post-frontal rain showers will continue through Saturday night, ending by early Sunday. An additional one-half to 1-inch of rain is expected by Saturday night. Overall, these low-
pressure systems could produce more than 4 inches of much-needed rain from Wednesday into Saturday.

There could be one last wave of precipitation Sunday night and next Monday before dry weather probably returns by the middle part of next week.

Today’s surf report

Today’s 3- to 4-foot northwesterly (295-degree, deep-water) swell (with an 8- to 15-second period) will continue at  this height and period through Tuesday. A 7- to 9-foot west-northwesterly (280-degree, deep-water) swell (with a 14- to 16-second period) will arrive along our coastline Wednesday and will remain at this height through Thursday.

Combined with this west-northwesterly swell will be 4- to 6-foot southerly (180-degree, shallow-water) seas (with a 4- to 6-second period) on Wednesday, decreasing to 2 to 3 feet Thursday.

A 10- to 12-foot southwesterly (195-degree, deep-water) sea and swell (with a 5- to 13-second period) is forecast along our coastline on Friday into Saturday, decreasing Sunday.

Seawater temperatures

Seawater temperatures will range between 52 and 54 degrees through today, increasing to 53 and 55 degrees Tuesday through Sunday.

John Lindsey’s Weekly Forecast is special to The Tribune. His Weather Watch column appears in the Local section Sundays. Email him at pgeweather@pge.com.

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