Here is this week’s weather forecast by PG&E meteorologist John Lindsey.
Mid- to high-level clouds from the remnants of Tropical Storm Norbert should continue to stream northward over San Luis Obispo County. This subtropical moisture should lead to a chance of rain showers or sprinkles across the Central Coast. However, most of the rain will evaporate before reaching the ground (called virga). There may also be the possibility of jellyfish clouds (altocumulus castellanus) developing. The higher relative humidity levels will make it feel quite muggy. Thunderstorms are possible over the Sierra Nevada, the Tehachapi Mountains, and the coastal mountains of the Central Coast. The subtropical moisture is forecast to exit eastward late tonight.
Today’s maximum temperatures are forecast to reach the low-90s in the North County and mid-70s in the coastal valleys. The beaches should remain in the 60s.
Slightly warmer weather is expected Tuesday as a high-pressure ridge builds over California. A pattern of night and morning low clouds and fog, clearing during the late morning and afternoon hours along with near normal temperatures for September is expected to continue through Sunday. A chance for much warmer weather is expected the following week.
Arriving from the northwest: Today’s 3- to 5-foot northwesterly (320-degree, deep-water) sea and swell (with a 5- to 8-second period) will continue at this height and period through Wednesday. A 3- to 5-foot northwesterly (290-degree, deep-water) swell (with an 8- to 16-second period) will arrive along our coastline Thursday and continue at this height and period through Friday.
Arriving from the south: At this time, Tropical Storm Norbert is too far to the east to generate any waves along the San Luis Obispo County coastline.
An intense storm is expected to develop about 600 miles southeast of New Zealand today. A 1- to 2-foot Southern Hemisphere (200-degree, deep-water) swell (with a 22- to 24-second period) will arrive along the coast Sunday, building to 4 to 5 feet (with an 18- to 20-second period) next Monday and Tuesday.
Seawater temperatures are forecast to range from 58 and 62 degrees through Friday.
PG&E safety tip: When thunder roars, go indoors!