Hot weather, dry lightning and gusty winds threaten Northern California
Northern California is facing elevated fire danger as the National Weather Service has issued a red flag warning beginning 11 a.m. Monday and lasting through 8 p.m. Tuesday. The alert follows a surge in temperatures above 105°F (40°C) and a persistent pattern of easterly winds combining with a moisture pulse moving through the Central Valley—a volatile mix expected to trigger scattered dry thunderstorms and erratic outflow winds.
The warning, which upgrades the previous fire weather watch, spans from Lakeport and Ukiah northward to Crescent City, where thunderstorm probabilities reach 25%. The weather service warns of winds gusting up to 50 mph (80 km/h), capable of rapidly spreading any fire that ignites.
According to the area forecast discussion, “wetting rain is possible in thunderstorm cores, but lightning strikes may occur far from these areas, often where the ground remains completely dry.” The concern is that any new fire starts could grow rapidly out of control.
Additionally, isolated thunderstorms are forecast with a 10% probability early Monday morning and again Tuesday afternoon, intensifying fire risk even further.
A separate red flag warning is also in effect for elevations between 1,000 and 3,000 feet in the Northern Sierra Foothills, including areas inside Shasta-Trinity and Lassen Volcanic National Park.
The increased threat arrives just after a weekend heat wave pushed interior valley temperatures well into the triple digits, with many zones recording temperatures near or above 105°F (40°C). These extreme conditions are forecast to persist through Tuesday, keeping the wildfire risk extremely high across the state.
Meteorologists highlight that vegetation remains dry, especially after below-normal precipitation in May, and the combination of heat, wind, and lightning could quickly ignite and spread wildfires. Residents are strongly urged to avoid driving over dry grass, dragging trailer chains, or leaving flames unattended, to help reduce ignition sources.
As of Sunday afternoon, PG&E has not implemented any public safety power shutoffs, but updates are expected on the utility’s official channels.
