A system bringing the chance of rain and thunderstorms across Southern California has cooled down the region. Snow is expected in parts of the Sierras.

Unseasonably cool temperatures along with a chance of rain enter the forecast this week for Southern California.

The final week of summer is expected to be a wet one, with a chance of showers in the forecast for Thursday and Friday. A low-pressure system will move through the area later this week with the best chance of rain arriving on Friday,

A 15-year-old girl from Riverside has been arrested after police say she made threats over social media targeting other students at her school. The incident occurred Sept. 18 at Ramona High School, according to a news release from the Riverside Police Department.

Murder charges against a 34-year-old Long Beach man who was out of jail on supervised release when he was accused of killing a 17-year-old high school senior just steps from her home in March of this year were announced Thursday.

Police in Riverside arrested a 15-year-old girl Wednesday who they said made violent threats on social media against Ramona High School.