Improving Atmospheric River Forecasts Act

The Improving Atmospheric River Forecasts Act directs NOAA to establish a program focused on enhancing forecasts of atmospheric rivers - narrow corridors of moisture that cause heavy precipitation and flooding in the western U.S. - particularly in mountainous regions. It authorizes $15 million annually (2024-2028) for pilot projects to improve subseasonal-to-seasonal forecasting, addressing challenges like mountain terrain modeling and atmospheric river prediction. The program requires developing measurable forecast skill metrics, categorizing atmospheric river intensity, and evaluating new technologies (e.g., aircraft, satellite data) to boost accuracy. Its goal is to reduce loss of life and economic damage through more reliable forecasts and warnings for water managers and communities in the western U.S.