Gusty winds and cooler, cloudy weather move into Southern California on Monday as a weak front moves up the coast.
An upper-level low will give way later in the day and bring a low pressure system that will bring heavy rain and strong winds from the Gulf of California to eastern Los Angeles County.
A strong cold air mass will form off the coast of Mexico and approach Southern California on Monday night and Tuesday.
As the cold air mass moves inland to California, a ridge of high pressure will form with a high chance for showers and thunderstorms. The storms are expected to pass through Thursday night into Friday before moving into the Gulf of California on Saturday. The heavy rain will spread into the region beginning on Saturday and continue through the rest of the week.
This will be the first major storm threat during the season. The first fall storm of the season will be an early reminder that autumn does not have a monopoly on winter weather events.
Monday will begin with high pressure building off the coast, moving inland and intensifying the storm threat. The system moves out of the mountains on Tuesday night and will become weak by Wednesday. The storms arrive later in the day and continue to push off the coast throughout the week.
By Thursday, storms and strong winds will become more widespread, with a chance for coastal flooding. However, there will be a quick transition back to a low pressure system on Friday afternoon as the cold front moves south. Stormy weather will continue into the weekend, where winds can hit 60 to 80 mph in the mountains.
Sunday’s high-pressure system to the north of the forecast low pressure system will push the winds and stormy weather farther inland. After the stormy weather is finished, there will be low pressure, with showers and thunderstorms.
Preparations for the stormy stretch of weather
Here are the early preparations to be made if you live in the southern Los Angeles basin:
Check on your garage doors and windows for blown screens. We’re also seeing roofs collapsing because of strong winds and heavy rains.
Check on your power lines and trees to take care of them if they