The Bay Area will get its best chance at measurable rainfall in nearly two months on Friday morning as a second surge of moisture from former Tropical Storm Iselle moves in.
Showers and storms will rotate in off the Pacific early Friday morning. Some storms could bring gusty, erratic winds, especially across the coastal ranges of San Mateo and Santa Cruz counties. Isolated lightning is also possible.
Those hazards prompted a red flag warning for the Santa Cruz Mountains south through the Santa Lucia range in Monterey County, in effect from 5 a.m. to 3 p.m., especially above 1,000 feet where vegetation is critically dry…