Published by National Weather Service 11:07 am PDT on August 4, 2021
Gusty wind, very low humidity, and extremely dry fuels combine to bring critical fire weather conditions over the Northern and Central Sacramento Valley and Coastal Range mountains this afternoon into tonight as well as in the northeast foothills and mountains of eastern Shasta and Western Plumas counties and the Northern Sierra Nevada this afternoon through Thursday evening. Winds in the northern Sacramento Valley peak Wednesday afternoon and early evening. Relative humidity levels gradually increase over low elevations on Thursday, with higher elevations remaining dry and winds increasing again in the afternoon into the evening.
Stanislaus National Forest West of the Sierra Crest- Northern Sierra Including the Tahoe and El Dorado National Forest/South West of the Sierra Crest
RED FLAG WARNING IN EFFECT FROM 1 PM THIS AFTERNOON TO 9 PM PDT THURSDAY FOR GUSTY WIND AND LOW HUMIDITY FOR FIRE WEATHER
ZONES 221 AND 269...
The National Weather Service in Sacramento has issued a Red Flag Warning, which is in effect from 1 PM this afternoon to 9 PM PDT Thursday.
* AFFECTED AREA...Western slope of the Northern Sierra Nevada.
* WIND...South 10 to 20 mph with local gusts up to 35 mph, locally higher. Strongest wind expected late afternoon and early evening.
* HUMIDITY...Minimum humidity in the single digits to mid-teens. Overnight humidity recoveries 20 to 45 percent.
* IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended.
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.
More information is available at: https://www.weather.gov/sto/
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