FEMA Flood Zone Lookup in Wyoming

Wyoming faces flood risk from spring snowmelt, flash flooding in canyons and draws, and riverine flooding along the North Platte, Yellowstone, Bighorn, and Snake rivers. The state's mountainous terrain creates concentrated runoff events during spring warming when accumulated snowpack melts rapidly. The 2011 flooding along the North Platte River caused significant damage in Casper and surrounding communities. The Bighorn River floods its broad valley through Sheridan, Lovell, and the Bighorn Basin. Yellowstone River flooding in June 2022 affected communities in Park County including Gardiner, Cooke City, and the north entrance to Yellowstone National Park. The Snake River in western Wyoming faces flood risk from both snowmelt and monsoon rainfall. Flash flooding is a significant hazard in Wyoming's canyons and draws where narrow terrain concentrates water flow. The state has approximately 80 NFIP-participating communities, with limited FEMA mapping in many rural and mountain areas. Wyoming's low population density means that flood impacts often affect small communities with limited resources for mitigation and recovery. Climate change is expected to alter snowmelt timing and intensity, potentially increasing spring flood risk across the state.