The first of two weather systems moves through Arizona tomorrow, bringing widespread, light rain to much of the southern half of the state. Rain chances are near 40% for the Valley on Wednesday, with light rainfall totals not expected to climb higher than quarter inch.

The storm system that brought dangerous rainfall and strong winds to Southern California will bring showers to Arizona on Christmas Day, Dec. 25.

Wednesday and Thursday are ABC15 Weather Action Days as rain impacts New Year's travel and holiday plans across the Valley.

The weather in Phoenix was often unpredictable, with an unexpected series of fall rainstorms and a sudden December heat wave.

Arizona once had to dig out of 100 inches of snow. It paralyzed Flagstaff and buried the White Mountains in almost 9 feet of snow.