The fire weather watch is in effect from 5 p.m. Thursday until 5 a.m. Friday, the National Weather Service reported.
The agency said a fire weather watch means that critical fire weather conditions are forecast to occur.
In this case, that includes isolated dry thunderstorms that could occur and lead to fire starts, along with gusty and erratic winds of up to 40 miles per hour.
Forecasters expect showers and thunderstorms to develop across the interior mountains of northwest California Thursday evening and night.
A mix of dry and wet storm activity is expected, with dry storms posing a threat for fire starts, according to the forecast.
The specific Lake County forecast calls for a 20% chance of showers and thunderstorms after 11 p.m. Thursday, with conditions clearing by Friday morning.
Daytime temperatures will range into the high 90s in the south county on Thursday, with slightly cooler conditions elsewhere, reaching the high 80s and low 90s into early next week, with nighttime temperatures hovering in the mid 50s to low 60s, based on the forecast.
Light winds of up to about 10 miles per hour also are forecast through Friday, forecasters said.
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