bay area weather 4 hours ago Kari's forecast: Cooler today Meteorologist Kari Hall has details on a temporary drop in temperatures in the Microclimate Forecast. US & World Videos 2:39 Jeff's Forecast: Fog returns as temps set to drop across the Bay Area 3:30 Jeff's forecast: What's causing a huge temperature drop 2:54 National Weather Service upgrades its radar systems 2:57 Forecast: Last hot day 2:23 Kari's forecast: Last hot day