We don't have the marine layer," National Weather Service meteorologist Nicole Sarment said. "We're clear of that everywhere." So it is that nature's cooling mechanism for the region will be missing as temperatures move their way up from the low and mid-90s beginning Tuesday until they get into the high 90s and possibly 100s in some areas on Wednesday and Thursday.
A system in the eastern Pacific Ocean has created a thick ridge of high pressure that Sarment said is still building and responsible for the heat. Temperatures are expected to hit the mid-to-high 90s Tuesday in most areas of the East Bay.
"Those temperatures all should go up 3 to 5 degrees from Wednesday until Thursday," Sarment said, adding that by Wednesday, Concord could get to 99 degrees, Livermore to 97 and San Jose to 96.
A "tiny bit of relief" is expected come Friday when the effect of two low-pressure systems further out over the Pacific Ocean begin to have an effect, Sarment said.
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