Parts of California will experience their third round of dangerous fire weather conditions in seven days beginning on Tuesday. The setup includes what could be one of the most powerful windstorms in years for the Los Angeles area.
The new round of high fire danger commences Tuesday in Northern California and then spreads toward Southern California Tuesday night into Wednesday. Red flag warnings for the fire danger have been posted by the National Weather Service in these areas.
These dangerous conditions will be triggered by a strong high-pressure system and southward plunge of the jet stream diving into the West from Canada. When this happens, strong offshore flow exists in California, contributing to gusty winds and low humidity.
Southern California is predicted to see strongest Santa Ana winds so far this fall beginning Tuesday night and lasting into Thursday, according to the National Weather Service (NWS). Wind gusts of up to 80 mph are possible in the mountains and foothills, and relative humidity could drop into the single digits. Gusts could reach 70 mph in other parts of Ventura and Los Angeles counties.
"These winds will result in a significant threat for large fast-moving fires and wind damage (like downed trees, power lines, and broken signs or overhangs)," warned the Oxnard/Los Angeles NWS forecast office.
Fire danger will also increase again in Northern California Tuesday into Wednesday, including the area where the Kincade Fire is burning in the North Bay region.
Winds from this third round of fire danger in Northern California won't be as strong as what happened there this past weekend, but a combination of low humidity and gusty winds will still make conditions hazardous for fire growth. Critical fire weather conditions may cover a large part of the region Tuesday into early Wednesday.
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