The USDA SWCH is part of a five-year integrated project to develop improved educational materials, modes of communication and issue expertise that will help in assisting farmers and ranchers to better assess the sources of past crop and livestock production losses due to weather and climate disruption as well as explore future trends in these causes of loss. In so doing we advance adaptation to extreme weather variability and climate change. It is essential to understand past trends and likely future sources of weather and climate risks before making changes in production systems.