In the northwest, winter flooding is dominated by heavy precipitation events, while spring flood events result from snowmelt, augmented by precipitation. Daily forecasts are made using observations of temperature and precipitation. Forecast of meteorological parameters are included in the river forecast model. Flood forecasts and warnings are disseminated to the public through Weather Forecast Offices. Forecast distribution is made using the NOAA Weather Radio, commercial radio, television, and local emergency agencies.
Most flood related deaths occur in motor vehicles.
The demands for fresh water are increasing and more effective management of our limited water resource has become critical. Operations of reservoir systems are growing more complex, involving trade-offs between water supply, flood control, power generation, fisheries, recreation, and environmental concerns. Advanced hydrometeorologic and climatic forecasting techniques are available to reduce the risk as well as to increase the efficiency of water management decisions. Forecasts of seasonal water supply are prepared monthly from January through June. These forecasts are a useful indicator of either potential flood or drought conditions.