The first big Santa Ana windstorm of the fall will arrive sometime Sunday evening, with wind gusts of up to 75 miles per hour predicted to hit mountain peaks Monday, forecasters said Sunday.

Red Flag warnings were posted to go up at 10 p.m. Sunday evening, and forecasters said the approaching weather pattern was predicted to be a little bit more severe, than earlier thought.

Utility officials in northern California said they might switch off some power circuits due to high winds, but Southern California Edison officials have not issued similar warnings in its service area.

Gusty and potentially damaging Santa Ana winds were predicted to form Sunday evening and Monday morning, NWS officials said. Gusts between 60 and 75 mph were held possible through Monday.

A significant warming and drying trend will develop as a high pressure system over inland deserts pushes air through canyons and over mountain slopes, the forecast said. High temperatures in 80s to lower 90s will be prevalent along the Los Angeles coast and valley areas.

But overnight lows will be quite chilly in some wind-sheltered areas and the interior valleys. A Freeze Watch may be issued for the Antelope Valley on Monday night and into Tuesday morning.

There is a chance that Red Flag conditions will persist through Wednesday in the mountains and some valleys, the NWS said.

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