Flooding Pineapple Express California California Storms Impact on California Impact on Regions California Storm Snowfall Evacuations Geographical Impact Heavy Rain Rainfall El Niño Flood Threat Impactful Storms Southern California El Nino Effects of Atmospheric Rivers Water Vapor Flash Flooding Megastorms Measurement Instruments Winter Weather Coastal Storms Impact on US Wind Events Impact on Communities Snowstorms Bomb Cyclones Travel Impacts Low-Pressure Systems Rainfall and Flooding Rainfall Impact