SACRAMENTO (CBS13) – Hot temperatures will hit the valley this weekend with Sacramento reaching 100 degrees Saturday and Sunday.

READ MORE: Family Of Fallen Elk Grove Officer Ty Lenehan Issues Statement

Other than the heat, the big story will be the increasing chances of thunderstorms for both the mountains and valley. A low-pressure system off the coast will help usher in moisture that will spark Sierra storms starting Sunday afternoon.

READ MORE: Five Injured In Crash Near Cameron Park On Saturday night, One Infant

The low-pressure center will remain stationary and keep the chance for storms in the forecast until Thursday. Most of the action will be in the Sierra, but forecast models indicate some of the storms will move into the valley.

The best shot for valley storms will be Monday through Wednesday. Some of the storms could even happen at night. After Wednesday, the low pressure center will push out of the state, helping to kick up the delta breeze.

MORE NEWS: Colorado Fire Prompts Evacuations In Monterey County, 25% Contained

Valley highs will drop back to normal levels by Thursday with high temps topping out in the low 90s.