The Phoenix forecast calls for partly sunny skies and highs in the mid-80s on Thursday and Friday, but a wet storm system is due to arrive soon.

Learn more about the latest Phoenix area weather forecast and conditions with Most Accurate Forecast from ABC15.

The system may not center over the state until Saturday evening, bringing the best chance for storms. Rain chances in Phoenix will increase from 20% Friday to 40% Saturday and 60% Saturday night. If the storm system doesn't dig as far southwest, or moves more quickly, the best chance for wet weather could speed up.

Scattered showers and cooler temperatures arrive in Phoenix this weekend with rain totals under a quarter inch in most areas.

Storms moved through metro Phoenix on Tuesday morning, kicking off what is expected to be wet and chilly stretch across the area.

Warm conditions will continue through Friday, with high temperatures in the mid-80s, but a major storm system is expected to bring rain, wind, and significantly cooler temperatures over the weekend.

Strong storms in the Phoenix area led to the loss of power among several thousand customers and significant damage at Desert Sky Mall.

Phoenix forecast indicates an unusual spell of rain and thunderstorms with high precipitation chances through the week.

The weekend weather forecast includes chances for showers across the Phoenix area, before clear skies return Nov. 24.

West-side residents saw 1-inch hail, brief torrential rainfall and lightning as afternoon turned to evening, according to the National Weather Service. The ceiling of a store at Desert Sky Mall partially collapsed, the Phoenix Fire Department said, severing a water line that caused extensive damage and will close the entire mall indefinitely.

The Valley is in for another day of scattered showers, isolated thunderstorms and possible flooding on Wednesday.