North winds and low humidity have prompted the National Weather Service in Sacramento to issue a Red Flag Warning, which is in effect from 6 a.m. Saturday, June 8 to 5 p.m. Sunday, June 9.
Well above average temperatures combined with breezy to strong north winds will bring increased fire weather concerns this weekend. Daytime humidities will be low with poor humidity recoveries expected overnight Saturday. The wildland fuels are driest at the lower elevations, where there has been less precipitation over the last month. Therefore, the warning is in effect below the 1000 foot level.
The affected area includes the Sacramento and San Joaquin Valley. North winds are forecast from 15 to 30 mph with gusts to 35 to 45 mph, with the strongest wind gusts anticipated on Saturday. Winds diminishing Sunday afternoon to 10 to 20 mph. Minimum humidity 10 to 20 percent during the day, locally lower in the upper single digits. Poor to moderate humidity recoveries overnight of 30 to 40 percent.
Highest threat ... Western Sacramento and northern San Joaquin valleys, where the highest wind gusts are expected. Impacts ... any grass 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.