September 23, 2018 – The National Weather Service in Sacramento has issued a Red Flag Warning, which is in effect from 11 PM this evening to 5 PM PDT Tuesday. The Fire Weather Watch is no longer in effect.

Northerly wind will increase this evening becoming gusty overnight into Monday morning, and then again Monday evening into Tuesday afternoon. Widespread poor humidity recoveries expected overnight with low daytime humidities Monday and Tuesday. Combination of gusty wind, low humidity, and very dry fuels could bring critical fire weather conditions during this period.

* WIND…North wind 10 to 20 mph with gusts to 25 mph, locally higher. Strongest winds expected in the overnight and early morning hours.

* HUMIDITY…Overnight humidity recoveries as low as 20 to 30 percent, locally in the 10s, especially over the northern and western Sacramento Valley and surrounding terrain. Daytime minimum humidities below 15 percent, locally in the single digits.

* IMPACTS…Any fires that develop will likely spread rapidly. Outdoor burning is not recommended.

Affected area:

  • Stanislaus NF West of the Sierra Crest
  • Northern Sierra Foothills from 1000 to 3000 Ft. Includes portions of Shasta-Trinity and Butte Units
  • Northern Motherlode From 1000 to 3000 Ft. Includes portions of Nevada-Yuba-Placer-Amador and ElDorado Units
  • Northern Sierra Including Lassen NP and Plumas and Lassen NF/S West of the Sierra Crest (West of Evans Peak-Grizzly Peak- Beckworth Peak)
  • Northern Sierra Including the Tahoe and ElDorado NF/S West of the Sierra Crest


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.