Folsom Lake, one of the water storage areas in northern California, rose almost 30 feet in just 30 days. The increase was thanks in big part to the recent series of storms, bringing multiple days of rain to the Central Valley.

 

According to the National Weather Service, Folsom Lake rose steadily at the end of December, then took a sharp increase starting December 22. Folsom Lake is now at 52 percent of average for this date.