Despite the recent rains, the atmosphere is “moisture starved” right now, Bartling said, meaning that in general, the storm moving in between Wednesday and Thursday night will bring only light rain, sprinkling less than a quarter-inch of water in the coasts and valleys. In the mountains and foothills, there’s a potential for up to half an inch of rain.
Source: Los Angeles Times February 20, 2019 21:00 UTC