August 4, 2021 – The National Weather Service issued a Red Flag Warnings and Critical Fire Weather watch, in effect for Northeastern California for today through Thursday evening that could lead to rapid or dramatic increases in wildfire activity.
Source: NWS
Red Flag Warning
URGENT - FIRE WEATHER MESSAGE National Weather Service Sacramento CA 1008 AM PDT Wed Aug 4 2021 ...Red Flag Warning for Gusty Wind and Very Low Humidity this Afternoon through Thursday Evening... .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. CAZ221-269-051600- /O.EXB.KSTO.FW.W.0005.210804T2000Z-210806T0400Z/ Stanislaus NF West of the Sierra Crest- Northern Sierra Including the Tahoe and ElDorado NF/S West of the Sierra Crest- 1008 AM PDT Wed Aug 4 2021 ...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. PRECAUTIONARY/PREPAREDNESS ACTIONS... 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.
