![]() ![]() ![]() It also helps that the large-scale weather pattern has been quiet thanks to the wobbling of the ridge of high pressure to our west. It’s unusual to see this much fog in October, and it’s largely a byproduct of all that humid air left behind by September’s weather pattern evaporating out of the Bay Area’s valleys and passes. That’s from all the fog that’s consistently been rolling into the Bay Area for the past several days. And for a brief period at the tail-end of the month, it looked like drier air was going to make those moisture levels tank. The first big spike around the middle of September was thanks to all the rains that came through Northern California. Honing in on just the past four weeks, the Santa Cruz Mountains and the Diablo Range have both seen vegetation moisture levels that are near the average for this time of the year - which is welcome news. Gerry Díaz / Northern California Geographic Coordination Center The latest dates are highlighted in yellow. The blue line covers measured levels up to October 6, while the gray line is the average and the red line shows the lowest levels ever measured in the region. The latest moisture levels on large alpine trees in the Santa Cruz Mountains and Diablo Range, up to October 6, 2022. In terms of the Bay Area as a whole, October is a month when Red Flag Warnings tend to spike.īut recent weather events have really watered down the 2022 fire season. Oaklanders can still recall the historic firestorm that decimated neighborhoods in October 1991, which was driven by intense Diablo winds that roared into the Oakland and Berkeley hills. ![]()
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