weather January 6, 2023 11:03 am What Is a Bomb Cyclone? The term “bomb cyclone” describes a storm that’s rapidly intensifying. The weather event happens when the atmospheric pressure of the storm drops 24-millibar (the unit that measures atmospheric pressure) in 24 hours. US & World Videos 2:30 Kari's forecast: Storm on the move 3:27 Forecast: Atmospheric River to bring widespread Bay Area rain Friday 3:52 Jeff's forecast: Atmospheric river hits all of the Bay Area Friday 2:34 Atmospheric river delivers fresh snow to the Sierra 2:56 Forecast: More heavy rain
