Here is this week’s weather forecast from PG&E meteorologist John Lindsey.
The cold core of the upper-level low-pressure system will slide through the Central Coast late Monday morning into Monday night with mostly cloudy skies and widespread scattered rain showers with the possibility of thunderstorms. These thunderstorms can produce localized heavy rain, small hail and lightning. Altogether, total rainfall amounts are expected to range between a quarter and half an inch by Monday night. Snow will return to the Sierra Nevada on Monday as snow levels will drop to about 4,000 feet, with the bulk of the snowfall above 5,000 feet.
The low-pressure system will exit the Central Coast on Tuesday, with areas of morning ground fog, cooler temperatures and fresh to strong (19- to 31-mph) northwesterly winds and partly cloudy skies.
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High pressure will build over the Great Basin on Tuesday night into Friday. This condition will produce a pattern of fresh to strong (19- to 31-mph) Santa Lucia (northeasterly) winds during the night and morning hours, decreasing during the afternoon hours. Clear skies coupled with dry Santa Lucia flow and a cool airmass will result in chilly night and morning temperatures, especially in the North County, where temperatures will drop below freezing during the early morning hours. These gusty Santa Lucia winds will keep the beaches and coastal valleys above freezing because of compressional heating.
The long-range models hint at the possibility of a return of unsettled weather next weekend, but details remain unclear at this time.
Monday’s Surf Report
Fresh to strong (19- to 31-mph) northwesterly winds along the California coastline will generate an 8- to 10-foot northwesterly (310-degree, deep-water) sea and swell (with a 5- to 15-second period)Monday into Tuesday. This sea and swell will decrease to 4- to 6-feet (with a 7- to 11-second period) Wednesday, building to 5 to 7 feet (with a 10- to 13-second period) Thursday and Friday.
The longer-range numerical models are advertising a large storm developing in the Gulf of Alaska on Thursday. If this forecast is verified, a 9- to 11-foot northwesterly (310-degree, deep-water) swell (with an 18- to 20-second period) from this storm will arrive along the Central Coast on Saturday into Sunday.
Arriving from the Southern Hemisphere
A 1- to 2-foot Southern Hemisphere (210-degree, deep-water) swell (with a 17- to 20-second period) will arrive along our coastline Tuesday into Wednesday.
Seawater temperatures will lower to 58 and 61 degrees through Friday.
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At PG&E, your safety is our first concern. Lightning kills an average of 49 people in the United States each year, and hundreds more are severely injured. The Central Coast could experience thunderstorms this Monday. Remember, there is no safe place outside when thunderstorms are in the area. If you hear thunder, you are likely within striking distance. “When thunder roars, go indoors.”
John Lindsey’s Weekly Forecast is special to The Tribune. His Weather Watch column appears in the Local section on Sundays. Contact him at email@example.com.
This week’s temperatures
LOWS AND HIGHS, SLO AND COASTAL VALLEYS
LOWS AND HIGHS, PASO ROBLES