Local

SLO County weather forecast for the week of Jan. 18

John Lindsey
John Lindsey dmiddlecamp@thetribunenews.com

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

A cold front will move through the Central Coast on Monday morning with fresh to strong (19 to 31 mph) southerly winds and rain. Rain will turn to scattered showers Monday afternoon, ending by Monday night. Total rainfall amounts are expected to range between a quarter and half an inch.

A stronger low-pressure system will tap into a plume of subtropical moisture and produce steady gentle to moderate rain Tuesday. A few rain showers will linger into Wednesday morning. Total rainfall amounts with this system are expected to range between half an inch and 1 inch of much-needed precipitation. Because of subtropical origins, temperatures will be mild, with minimum temperatures in the 50s and maximum temperatures in the 60s. Snow levels Monday and Tuesday are expected to remain above 6,000 feet across the Sierra Nevada. A break in the weather is forecast for Wednesday afternoon into Thursday.

Another storm system will produce increasing southerly winds and rain Friday, followed by additional rain Saturday into Sunday. For the 10-day period ending next weekend, precipitation totals could reach between 1 and 3 inches, with higher amounts in the Santa Lucia Mountains. As much as 4 feet of new snow is possible in the higher elevations of the Sierra Nevada.

Monday’s Surf Report

This morning’s 12- to 14-feet west-northwesterly (285-degree, deep-water) swell (with a 15- to 17-second period) will decrease to 10 to 12 feet by Monday night. This swell will further decrease to 9 to 11 feet (with a 14- to 16-second period) Tuesday. An 8- to 10-foot west-northwesterly (285-degree, deep-water) swell (with an 11- to 15-second period) will develop along our coastline Wednesday, decreasing to 5 to 7 feet (with an 11- to 15-second period) Thursday morning.

Another intense storm with hurricane-force winds will develop near the international dateline over the next 48 hours. A 10- to 12-feet west-northwesterly (285 degree) swell with a 22-plus second period will arrive along our coastline Thursday night, building to 13 to 15 feet (with an 18- to 20-second period) Friday into Saturday. This swell will decrease to 9 to 11 feet (with a 15- to 17-second period) Sunday.

The southern branch of the polar jet is expected to shift farther south by the end of January. Consequently, a high-energy westerly swell is forecast to arrive along the Pecho Coast on Jan. 27, followed by another energetic westerly swell Jan. 29, as storms continue to march across the Pacific. Overall, rough oceanographic conditions are expected to continue through mid-February, if not longer.

Seawater temperatures

Seawater temperatures will range between 57 and 59 degrees through next Monday.

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At PG&E, your safety is our first concern. This winter is likely to have a very strong El Niño effect that may bring more-than-normal amounts of rain across California. Please visit www.pge.com for preparedness tips.

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

This week’s temperatures

LOWS AND HIGHS, SLO AND COASTAL VALLEYS

MON

TUE

WED

THU

FRI

SAT

SUN

55 63

50 63

49 68

48 68

49 65

47 64

49 65

LOWS AND HIGHS, PASO ROBLES

MON

TUE

WED

THU

FRI

SAT

SUN

51 61

50 62

47 65

45 66

44 63

41 61

44 62

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