The National Weather Service in Sacramento has issued a red flag warning for the Northern San Joaquin Valley in San Joaquin and Stanislaus counties.

The warning is in effect from 9 p.m. Saturday, Sept. 26 to noon PDT Monday, Sept. 28 for gusty north to east winds and low humidity.

North to east winds 15 to 25 mph are forecast, with gusts up to 35 to 40 mph. Stronger gusts up to 45 to 55 mph may be possible through favored gaps and canyons. Strongest winds expected Saturday night through Sunday, especially for the west side of the Sacramento Valley and the Sierra foothills.

Minimum daytime humidity levels of 10 to 20 percent are anticipated, with maximum overnight humidity between 15 and 40 percent. Higher humidity recovery expected in the Central Valley and Delta areas.

Numerous wildfires are already occurring. Extreme fire safety precautions should be exercised to prevent any additional fires. Outdoor burning should be avoided.

A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior.

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