Here is this week’s weather forecast by PG&E meteorologist John Lindsey.
Another upper-level low-pressure system is forecast to move southward along the California coastline and to the Central Coast on Monday into Wednesday. This system is expected to bring below-normal temperatures; strong to gale-force (25- to 38-mph) afternoon northwesterly winds; areas of night and morning marine low clouds with pockets of mist and drizzle; and a chance for rain showers and isolated afternoon thunderstorms across the inland mountains, with a slight chance for showers over lower elevations Tuesday and Wednesday.
Overall, only light precipitation amounts — below a quarter of an inch along elevated terrain and a tenth of an inch across lower elevations — are expected in locations where showers develop. High temperatures through Wednesday are forecast to range from the mid-70s in the North County, the high 60s in the coastal valleys, and the high 50s to the low 60s along the beaches.
High pressure will then build over the Central Coast on Thursday and into the weekend. This condition will continue to produce strong to gale-force northwesterly winds along the coastline during the afternoon hours as well as night and morning marine low clouds. However, temperatures will rise to above-normal levels, with 80s across the interior, 70s in the coastal valleys, and mid- to upper 60s at the beaches. Even warmer weather is likely to develop the following week.
A 2- to 4-foot northwesterly (315-degree, deep-water) sea and swell (with a 5- to 9-second period) is expected along the San Luis Obispo County coastline Monday into Wednesday, increasing to 4 to 6 feet with the same period Thursday. This northwesterly sea and swell will further build to 8 to 10 feet (with a 5- to 9-second period) on Friday into Sunday.
Seawater temperatures are expected to range from 53 to 56 degrees through Sunday.
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This week’s PG&E safety tip: Thunderstorms may develop in the county’s elevated terrain on Tuesday into Wednesday. Lightning from such storms kills an average of 49 people in the United States each year, and hundreds more are severely injured. There is no safe place outside when thunderstorms are in the area. If you hear thunder, you are likely within striking distance. Remember: “When thunder roars, go indoors.”
John Lindsey’s Weekly Forecast is special to The Tribune. He is PG&E’s Diablo Canyon 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