Here is this week’s weather forecast by PG&E meteorologist John Lindsey.
The high pressure ridge over the southwestern U.S. will continue to weaken, while a 575 decameters, upper-level, low-pressure system west of Point Conception will slowly rotate over the Central Coast by Thursday.
This will produce extensive night and morning marine low clouds with areas of fog and drizzle along the beaches, coastal valleys and parts of the North County today into Wednesday.
Increasing northwesterly winds along the coastline will produce mostly clear skies along the beaches during the afternoon hours and gradually cooler temperatures into Wednesday.In fact, maximum temperatures will likely be well below-normal for July on Wednesday.
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Monday’s maximum temperatures will reach low 90s in Paso Robles, while San Luis Obispo will reach the mid-70s. High temperatures along beaches will range from the mid-60s along the northwesterly-facing beaches of Morro Bay, Los Osos, Montaña de Oro and Nipomo, and high 60s along westerly facing beaches of Cambria, Grover Beach and Pismo Beach.South-westerly-facing beaches of Cayucos and Avila Beach will reach the 70s.
If you’re traveling to the Sierra Nevadas, afternoon and evening thunderstorms will develop as monsoonal moisture continues to be drawn northward by the upper-level low pressure system off our coastline.
As this upper-level low moves toward the coast, increasing mid- to high-level subtropical clouds, cooler temperatures and possible thunderstorms will develop in eastern regions of San Luis Obispo and Santa Barbara counties on Wednesday night into Thursday. There’s also a slight chance this moisture could move westward to the coastline. The upper-level low exits to the northeast on Friday, and warmer temperatures will develop throughout the coast into the weekend as high pressure rebuilds over the southwest.
Monday’s surf report
Fresh to strong (19- to 31-mph) afternoon northwesterly winds will generate 3- to 5-foot northwesterly (310-degree, deep-water) sea and swell (with a 4- to 9-second period) this afternoon into Wednesday. A 1- to 3-foot northwesterly (290-degree, deep-water) swell (with a 7- to 9-second period) will develop along our coastline Thursday and will remain at this height and period into Saturday.
Arriving from the Southern Hemisphere
A 1- to 2-foot Southern Hemisphere (220-degree, deep-water) swell (with a 20- to 22-second period) will arrive along our coastline later today, slowly building to 3- to 4-feet (with a 15- to 18-second period) on Thursday into Saturday.
Sea temperatures will range between 53 and 57 degrees through Saturday.
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At PG&E, your safety is our first concern. Lightning kills an average of 49 people in the U.S. 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 of the storm. Remember: When Thunder Roars, Go Indoors.