Northern California is seeing two or three times more rain than normal. So why is Southern California so dry?

As the state enters its sixth year of drought, Northern California is seeing some significant relief thanks to a series of powerful storms, while Southern California remains mired in record dry conditions.

Despite a rainstorm set to hit the Southland this week, the region continues to face an unprecedented lack of precipitation, recording only 60% of average rainfall this month. By contrast, communities from the Bay Area north to the Oregon border have recorded 200% to 300% of the average this month, according to the National Weather Service.