The gusty northeast winds, along with warm and very dry conditions, increase the risk for fast-moving wildfires.
Kathy Hoxsie, a meteorologist in the weather service’s Oxnard office, said winds will be noticeable by midday Thursday and will probably reach their peak late Thursday into early Friday.
Santa Ana wind events occur when high surface pressure builds over the Great Basin region with lower pressure off the Southern California coast, according to the weather service. Air remains cooler as it moves across the deserts, but as it moves through mountain passes, it becomes compressed and warm. As the wind squeezes through mountains and canyons, wind speed increases, the weather service said.
“It can be difficult to imagine what this is like, but if you think about high pressure as being a high bubble, and low pressure as being a sink area, you can almost picture this flow,” Hoxsie said. “If you put a ball on top of the bubble, it’s going to roll into the sink, and the higher the difference between the high and low, the steeper that gradient and the faster the ball rolls.”
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