Here is this week’s weather forecast from PG&E meteorologist John Lindsey.
A series of transitory high-pressure systems will move over the Great Basin through Wednesday morning. This condition will produce moderate to fresh (13- to 24-mph) Santa Lucia (northeasterly) winds during the night and morning hours, gradually higher temperatures and mostly clear skies through Wednesday.
A vigorous 989-millibar low-pressure system and associated cold front will produce strong to gale-force (25- to 38-mph) southerly winds, mostly cloudy skies and rain on Thursday. This cold front will be followed by an upper-level trough and the potential for moderate gale-force to fresh gale-force northwesterly (32- to 46-mph) winds and scattered rain showers Thursday evening into Friday.
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These systems will be relatively mild. Consequently, snow levels will be about 5,500 feet for our area. Total rainfall amounts are expected to range between a fourth and three-fourths of an inch for most Central Coast locations.
Long-range models then suggest a cold and wet weather pattern could develop next Sunday and Monday as another low-pressure system moves through San Luis Obispo and Santa Barbara counties with rain.
Monday’s 10- to 12-foot (300-degree, deep-water) swell (with an 18- to 20-second period) will decrease to 8 to 10 feet (with a 14- to 16-second period) Tuesday, further lowering to 7 to 9 feet (with an 11- to 15-second period) by Wednesday.
A 958-millibar Gulf of Alaska storm with hurricane-force winds will develop Monday into Tuesday. An 11- to 13-foot northwesterly (300-degree, deep-water) swell (with a 17- to 19-second period) from this storm will arrive along our coastline Thursday, peaking Friday at 14 to 16 feet (with a 15- to 17-second period). This northwesterly swell will decrease to 10 to 12 feet (with a 14- to 16-second period) Saturday, further lowering to 7 to 9 feet with the same period next Sunday and Monday.
Another long-period northwesterly swell is forecast along our coastline Dec. 16.
Seawater temperatures will range between 60 and 62 degrees through Thursday, decreasing Friday.
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At PG&E, your safety is our first concern. The holiday season is filled with activities and events to celebrate the season, many of which may involve alcohol. Correspondingly, the time between Thanksgiving and New Year’s Day always leads to an increase in alcohol-related vehicle accidents and fatalities, as well as an increase in DUIs issued to impaired drivers. Help others be responsible. If someone you know is drinking, do not let that person get behind the wheel. Speaking up and stepping in at this critical moment may save a life or prevent serious injury to the driver or an innocent victim.
John Lindsey’s Weekly Forecast is special to The Tribune. His Weather Watch column appears in the Local section on Sundays. Contact him at firstname.lastname@example.org.
This week’s temperatures
LOWS AND HIGHS, SLO AND COASTAL VALLEYS
LOWS AND HIGHS, PASO ROBLES