The red flag warning goes into effect at 1 p.m. Saturday and will continue until 5 p.m. Sunday.
The National Weather Service said a red flag warning means that critical fire weather conditions are either occurring now or will shortly.
Forecasters said building high pressure will result in breezy northerly winds with warming temperatures and lowering humidity through the weekend.
It’s that combination of breezy winds and low humidity that the National Weather Service will bring critical fire weather conditions over the western side of the Sacramento Valley into the northern Coastal Range and adjacent foothills.
Winds are forecast to decrease by early Sunday evening, based on the forecast.
The red flag warnings says there will be north to northeast winds of between 10 to 20 miles per hour with gusts of between 25 and 35 miles per hour in the warning area.
In response, on Friday PG&E reported that its emergency operations center is now activated for a potential public safety power shutoff due to the offshore wind event that’s heading toward Northern California.
PG&E reported that Lake County has an “elevated” risk of a power shutoff on Sunday, but as of Friday evening no shutoff had been announced.
Additionally, PG&E said that based on the forecast Lake County also has an elevated risk of a public safety power shutoff on Thursday.
PG&E said the weather models are indicating the warmer autumn weather will continue into Monday, to be followed by a slight cooldown through midweek as a weak weather system will pass to the north.
On Wednesday, high pressure is forecast to build and bring with it the potential for gusty offshore winds at times through the end of next week, when the second power shutoff for Lake County is possible.
Email Elizabeth Larson at