Temperatures will begin to drop this week before the latest storm will pummel Southern California as neighborhoods with burn scars are warned to brace for possible flash flooding, meteorologists forecast on Wednesday.

As of Wednesday, the latest storm system was spinning offshore, approaching the West Coast, bringing light showers in the Pacific Northwest and a chance of showers in San Luis Obispo and Santa Barbara counties.

While there will be a slight chance of showers Wednesday night in the LA region, the big change will arrive in the coming days with increasing clouds leading to a cooldown in the 60s and 70s.

Thursday

By Thursday afternoon, the storm will move down from the Central Coast to Southern California. Both Los Angeles and Ventura counties facing a 70% chance of showers or rain.

“At around 11 a.m. Thursday, we’re still looking at a mix of sun and clouds, and then the clouds will continue to spill,” NBC Los Angeles Meteorologist Stephanie Olmo said. “As we continue through the afternoon and the evening hours, we’ll have some light showers, breaking out around that time, but (it’ll be) sort of this first push. This first wave will start to move on Thursday night.”

The peak of the storm will likely be Thursday night as the storm can bring up to 2 inches of rain and possibly 4 inches of rain in the mountains and hills. Forecasters said rain could fall at a rate as high as 0.75 inches per hour, although higher rates are possible if any thunderstorms develop, according to the National Weather Service.

The incoming rain system will also likely lead to debris flows in foothills areas, especially in the recent burn areas of Altadena and the Pacific Palisades. 

“I wouldn’t be surprised if the National Weather Service issued flood watches, beginning today,” Olmo said. 

Friday

After Thursday night, the storm system will move toward Orange County and the Inland Empire, possibly bringing heavy rainfall and thunderstorms.

Some parts of the Inland Empire will face rain chances through the start of next week. 

Starting on Friday, all Southern California neighborhoods will see a drop in temperatures with the highs in the mid-60s and lows in mid-50s.