VERNON PRESTON, National Weather Service warning coordination meteorologist in Pocatello, Oregon, compiled this volume of weather and climate data from the Lewis and Clark Expedition in 2004, at the start of the bicentennial anniversary of the Corps of Discovery Expedition (1804–06). The National Oceanic and Atmospheric Administration (NOAA) published this information as a technical memorandum in 2004 and distributed 100 copies. The American Meteorological Society (AMS) has reformatted the data and explanations of the significance of the expedition’s meteorological studies in this volume, which is meant for wider distribution to the public