During the historic flooding of the Missouri River in 2011, the United States Army Corps of Engineers (USACE) was at the center of the flood control operations. Specifically the activities of the USACE Omaha District and Omaha Division were at the forefront of the flood control efforts. This flood was complex in space and time, and numerous variables were involved in the flood. Flooding occurred throughout the entire Missouri river basin for several weeks, from the headwaters in the Rocky Mountains to the lower stretches of the river near the mouth. Due to the sensitivity to rainfall, winds, snowmelt, and temperatures, weather support services were needed to assist the USACE with its operations. The majority of this support was provided by the NWS WFO Omaha (OAX), however other entities were also involved including the NWS NCEP's Heavy Precipitation Center, and the NWS Missouri Basin River Forecast Center. This presentation will describe the decision support services provided, as well as lessons learned and important benefits.