Diablo and Santa Ana winds set to hit California, increasing wildfire danger

SAN FRANCISCO — A significant weather event, commonly referred to as “diablo wind,” is anticipated to affect Northern California starting Thursday evening. These winds, which are characterized by hot and dry conditions, are likely to decrease humidity levels, thereby heightening the threat of wildfires in the region.

Red flag alerts have been established to signal elevated fire risk, extending from the central coast, through the San Francisco Bay Area, and into the northern parts of Shasta County, which is close to the Oregon border. Meteorologists expect sustained winds of 35 mph (56 kph) in several locations, with peak gusts potentially exceeding 65 mph (104 kph) in mountainous areas, as per the National Weather Service.

Meteorologist Brayden Murdock from the Bay Area office highlighted, “This could end up being the most significant wind event of the year to date, and we advise the public to exercise caution.”

During the occurrence of diablo winds, which are prevalent in the fall months, the air’s relative humidity dramatically decreases, resulting in drier vegetation that can be easily ignited. The term “diablo,” meaning “devil” in Spanish, describes the hot winds that blow from the inland areas towards the coastline, driven by high-pressure systems forming over the western United States.

In response to the impending weather, Pacific Gas and Electric Co. is ready to implement power shutoffs for a limited number of customers in regions where strong winds could potentially damage electrical infrastructure and ignite fires. Similar preemptive actions might also be taken in Southern California, where the Santa Ana winds are predicted to occur on Friday and Saturday.

In the Los Angeles area, forecasters indicate that winds will not be as severe as in Northern California, with gusts ranging from 25 to 40 mph (40 to 64 kph) anticipated in the foothills and mountainous regions. Mike Wofford, a meteorologist from the local office, remarked on Wednesday, “I believe it will be milder overall, but the risk for fires remains present.”