Here is this week’s weather forecast by PG&E meteorologist John Lindsey.
An interesting weather pattern is on tap this week, with gale-force Santa Lucia (northeasterly) winds and frigid North County morning low temperatures during the first part of the week followed by record-breaking high temperatures at the end of the week.
A strong high-pressure ridge off the Northern California coast will produce periods of gale-force Santa Lucia (northeasterly) winds Sunday into Tuesday. These offshore winds will increase to strong to gale-force (25 to 38 mph) levels, with gusts to 55 mph in some of the coastal canyon and passes Monday night into Tuesday morning.
A cooler air mass will filter into the Central Coast later today into Monday and combined with clear skies will produce frigid overnight lows in the inland valleys, especially in the wind sheltered areas Monday, Tuesday and Wednesday. In fact, overnight temperatures will drop to the mid-20s in the North County during this period.
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As the week progresses, the area of high pressure responsible for the gale-force Santa Lucia winds will move over California. This condition will decrease the Santa Lucia winds but will increase air temperatures. Thursday, Friday and Saturday will see maximum temperatures reach the high 70s in the North County and along the beaches and mid-80s in the coastal valleys. If these temperatures reach these levels, they will break daily records.
High pressure could begin to weaken by next weekend, with temperatures dropping back to near-normal and overnight lows in the upper 30s to 40s. The next chance of rain is expected Dec. 12.
Sunday’s 7- to 9-foot northwesterly (305-degree, deep-water) sea and swell (with a 7- to 15-second period) will become a 6- to 8-foot northwesterly (310-degree, deep-water) swell (with an 8- to 13-second period) Monday. This northwesterly (310-degree, deep-water) swell will further lower to 4- to 6-feet (with an 11- to 17-second period) Tuesday into Wednesday.
A 4- to 6-feet northwesterly (295-degree, deep-water) swell (with a 15- to 17-second period) will arrive along our coastline Thursday through Saturday, decreasing to 3 to 5 feet (with an 11- to 15-second period) next Sunday. Increasing northwesterly swell is forecast to arrive along our coastline Dec. 11 and 12.
Seawater temperatures will range between 56 and 58 degrees through Friday.
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John Lindsey’s Weekly Forecast is special to The Tribune. He is PG&E’s Diablo Canyon Power Plant marine meteorologist and media relations representative. Contact him at firstname.lastname@example.org. Follow him on Twitter @PGE_John.
This week’s temperatures
LOWS AND HIGHS, PASO ROBLES
LOWS AND HIGHS, SLO AND COASTAL VALLEYS