Here is this week’s weather forecast by PG&E meteorologist John Lindsey.
San Luis Obispo reached 99 degrees Saturday, breaking the previous record of 95 set back in 1946. The high air temperature at the Paso Robles Airport reached more than 105 degrees Sunday, breaking the old record of 104 recorded in 1949. The high-pressure ridge responsible for the record-breaking heat in many Central Coast locations this past weekend will start to weaken later Monday.
In response, fresh to strong (19 to 31 mph) northwesterly winds will develop along the coast Monday afternoon and will bring cooler temperatures to the beaches and slightly cooler weather for the coastal valleys. However, the North County will remain hot, with temperatures reaching the triple digits. This hot and dry weather has significantly increased the fire danger to very high-to-extreme levels.
Cooler temperatures are expected Tuesday as the ridge of high pressure weakens further, allowing for cool and persistent northwesterly winds from the Pacific to push well inland. In fact, maximum temperatures can be as much as 20 degrees cooler in the North County. The marine layer with low clouds and pockets of mist and drizzle is forecast to return along the beaches during the night and morning hours starting Tuesday and continuing through the week.
Forecast models still suggest the possibility of subtropical clouds moving into the Central Coast on Monday night into Wednesday, but at this time, most of the moisture is expected to remain to the south and east of our area. However, these midlevel clouds could produce spectacular sunrises and sunsets.
An area of low pressure will drop southward into the Central Coast on Saturday into Sunday for strong to gale-force (25 to 31 mph) northwesterly winds along the coast and even cooler temperatures. The long-range models are still not indicating any rain.
Monday’s surf report
Monday’s 3- to 5-foot northwesterly (310-degree, deep-water) sea and swell (with a 7- to 9-second period) will continue along our coastline through Tuesday morning, increasing to 4 to 6 feet and with the same period Tuesday afternoon and will remain at this level through Friday.
Increasing northwesterly winds will generate a 6- to 8-foot northwesterly (310-degree, deep-water) sea and swell (with a 5- to 11-second period) along our coastline this weekend.
Arriving from the Southern Hemisphere
A 1- to 2-foot Southern Hemisphere (215-degree, deep-water) swell (with a 17- to 19-second period) will arrive along our coastline Tuesday, building to 2 to 3 feet (with a 15- to 17-second period) Wednesday into Thursday.
Abnormally warm seawater temperatures (60 to 65 degrees) will continue along the Central Coast through Friday. Strong to gale-force northwesterly winds this weekend will increase the amount of upwelling and will give cooler ocean temperatures.
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At PG&E, your safety is our first concern. When temperatures are unusually high, avoid strenuous activities in hot, direct sunlight and drink plenty of water. Pay attention to your body. Muscle cramps, dizziness and nausea may be signs of a heat-related illness.