National Weather Service United States Department of Commerce
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Last Map Update: Fri, Oct 16, 2026 at 4:28:14 am PDT

🚨 RED FLAG WARNING IN EFFECT TONIGHT THROUGH FRIDAY MORNING 🚨 The National Weather Service in the San Francisco Bay Area has issued a Red Flag Warning for the North Bay Interior Mountains from 10 PM Thursday until 11 AM Friday. Key Weather Details: Winds: Northerly winds 20 to 30 mph with gusts up to 40 mph. Highest peaks could see gusts up to 60 mph. Humidity: Relative humidity dropping to between 15% and 20%. Fuels: Vegetation and fuels remain critically dry. Impacts & Safety: These conditions will create an increased risk for rapid fire starts and aggressive fire spread. Exercise extreme fire safety precautions—avoid open flames or outdoor equipment that could create sparks. Ensure campfires are completely extinguished. Check your emergency supplies and have your go-bag ready. Stay alert, listen to local officials, and follow any evacuation orders promptly. Stay weather-aware and stay safe! 📱 Find updates at weather.gov/bayarea #CAwx #BayAreaWx
Near-critical fire weather conditions are expected in the North and East Bay interior mountains Thursday to Saturday due to offshore winds overnight leading to possible extreme fire behavior and rapid rates of spread. Relative humidities will be as low as 15-30% and wind speeds will be 15 to 25 miles per hour, gusting to 35 miles per hour. Exercise fire weather safety, make an emergency plan, have multiple ways to receive alerts, and stay tuned to forecast updates! Remember: one less spark, one less fire!

 

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