By themselves, the National Weather Service’s forecasted Tuesday highs for the Bay Area were telling enough about the power and unusualness of an October heat wave that is set to go full throttle Tuesday and Wednesday.
In Alameda County: 104 degrees in Pleasanton, 103 in Livermore and 96 in Oakland. In Contra Costa County: 104 in Concord, 103 in Walnut Creek, 101 in Lafayette and 102 in Antioch. In Santa Clara County: 103 in Morgan Hill and 101 in San Jose. In San Mateo County: 94 in Redwood City and 92 in San Mateo. In San Francisco: 91.
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Add to those figures the explanation for what’s happening, and the latest heat takes on an even more powerful look.
“One of the thresholds we look at is what the temperature is above the surface — about 5,000 feet or so over it,” NWS meteorologist Dylan Flynn said. “It hasn’t been this hot that far above the surface since 1980. The upper air high pressure just continues to be build, and the off-shore winds are bringing that heat all the way to the coast.”
So it is that some records were set to fall or be threatened, many of them set when Ronald Reagan was running for the presidency for the first time. That said, some areas that on Monday appeared ready to approach records — San Rafael and Kentfield in Marin County — are unlikely to crack triple-digits as originally anticipated, according to the weather service.
Still, new marks could be tied or set in Livermore (previous record 102 in 1952) San Jose (97, 1980), Santa Rosa (102, 1980) and Half Moon Bay (83, 2014), according to the weather service.
San Jose tied a record previously set in 2001 when it reached 95 on Monday, the weather service said. San Rafael also set a mark, reaching 102 to surpass by 1 degree its 1980 figure.
More of the same is also likely on Wednesday.
The two days “are basically going to copies of each other,” Flynn said, “The system is starting to get a long tail though. So it’s …read more
Source:: The Mercury News – Entertainment
