A weak atmospheric river rolled through the San Francisco Bay Area early Tuesday, dumping more than 2 inches of rain in the Marin County community Kentfield, nestled in the shadow of Mt. Tamalpais, but giving little relief to the drought stricken South Bay. Rainfall totals over the last 24 hours depended entirely on what zip code you lived in. The National Weather Service said as of 5 a.m., 2.21 inches had fallen in Kentfield, 1.57 inches in Santa Rosa and 1.66 inches in Mill Valley.