A bicyclist heads down Mount Diablo while staying cool by riding during the evening hours at sunset at Mount Diablo State Park in in Contra Costa County, Calif., on Thursday, Oct. 5, 2023. Hot temperatures are expected through Saturday according to the National Weather Service. (Jose Carlos Fajardo/Bay Area News Group)
Finally, some relief.
That was the message coming from some of the elements that help determine the Bay Area weather early Thursday. Barometric pressure is expected to be lower. The thickness of the marine layer is expected to be higher. And thermometers throughout the region won’t rise nearly as high as they have in previous days.
Read more ACE train hits, kills person in the South Bay
Safe to say that a searing heat wave is waving goodbye.
“We’re still going to have warmer temperatures (Thursday), especially in the usual places,” NWS meteorologist Dial Hoang said. “The cooldown is going to more substantial (Friday).”
Nevertheless, the anticipated relief won’t go unnoticed Thursday. The highest temperatures in the East Bay interior inland areas are expected to reach the lower to mid-90s; the Santa Clara Valley is forecast to peak in the upper 80s; and the cities near the water on either side of the bay aren’t likely to get must past 70, if they even get there.
Those figures will come on the heels of temperatures Wednesday that reached 99 degrees in Livermore, 97 in Concord, 90 in San Jose, 80 in Oakland and 76 in San Mateo. On Tuesday, the thermometer got to 101 in Livermore and Concord.
Now, a high pressure system with a weak dome has begun to move east, and lower pressure in the upper and lower levels of the region is replacing it, the weather service said. Combine that with moisture moving north from tropical systems in the southern Pacific Ocean, and it’s possible rain may be on the heels of a 12-15 degree cooldown.
“There is some chance of rain as we go into the late weekend,” Hoang said. “That’s probably going to be more present in the higher elevations of the Santa Clara Valley, San Mateo and Santa Cruz.”
That surge of energy from the tropical systems also is playing havoc with the tides in the region again, Hoang said. A coastal flood advisory for bayshore locations along the San Francisco, San Pablo and Monterey bays will go back into effect at 9 a.m. Friday and will stay that way at least until Oct. 13. Waves are expected to cover at least a foot more of ground than they usually reach.
As for the cooler temperatures, those are expected to stay around at least through the early part of next week.
“We may have some slight warming, as we get late into next week,” Hoang said. “But it’s not going to be anything compared to what we’ve been having.”
Read more Bay Area heat wave to persist with hottest days, but relief is in the distance
About the Author
