weather July 17, 2021 5:40 pm Rob's Forecast: Red Flag Warning For Lightning Increasing monsoon moisture across the Bay Area will bring the chance for isolated thunderstorms that could lead to lightning sparked files in the region. Rob Mayeda has the microclimate forecast. US & World Videos 2:48 Forecast: Slight warming 2:06 Kari's forecast: Slight warming 2:56 Forecast: Warm start, cool finish to the week ahead 3:13 Bay Area forecast: Warm start, cool finish to week ahead 2:56 Cinthia's forecast: Sunday sunshine, breezy afternoon