San Jose, California

We’re back to work in the Forecast Store, and we’re looking to the Bay Area for today’s action. They’ve recently experienced an intense heat wave, surprising for the late season. Will that continue?

At 653AM, PT, San Jose was reporting a temperature of 57 degrees with light fog in the area. Flow across San Jose was coming from San Francisco Bay, allowing the Silicone Valley to fill up with haze. Outside of San Jose, the Bay area is covered in a layer of mid layer clouds thanks to a light onshore flow. High pressure is being eroded by a deep trough coming ashore from the Gulf of Alaska
The weekend will start with a refreshing southwesterly flow off the Pacific, but the upper level trough will make an early season incursion into the Pacific Northwest. Rain and storms will be heaviest in northern California, particularly around Mount Shasta and Redding, but light rain working its way through the Bay area can’t be ruled out on Sunday evening.
Tomorrow – Cool with increasing clouds, High 70, Low 49
Sunday – Light rain and mostly cloudy, High 66, Low 47

TWC: Tomorrow – Sunny skies, High 72, Low 53
Sunday – Intervals of clouds and sunshine. High 67, Low, 53

AW: Tomorrow – Cool with low clouds giving way to sunshine High 72, Low 53
Sunday – Mostly cloudy and cool; a shower in places in the afternoon High 66, Low 53

NWS: Tomorrow – Sunny, High 71, Low 52
Sunday – A 20 percent chance of showers after 11. Partly sunny. High 66, Low, 52

WB: Tomorrow – Partly cloudy in the morning then becoming sunny.. High 71, Low, 53
Sunday – Partly cloudy in the morning then becoming mostly cloudy. A slight chance of showers in the afternoon. High 65, Low, 54

WN: Tomorrow – Mostly sunny, High 72, Low 52
Sunday – Partly cloudy with isolated showers, High 66, Low 52

FIO: Tomorrow – Partly cloudy starting overnight, continuing until morning. High 76, Low, 47
Sunday – Partly cloudy until afternoon. High 67, Low, 48

As you might be able to tell, I wrote the forecast long before I posted it. This is the current satellite imagery. Note the curl in the water vapor image off the coast of British Columbia. That’s driving the west coast weather this week!


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