Sioux Empire Regional Resource Directory - Aviationhttp://www.sioux-empire.com/aviation/The Sioux Empire Regional Resource Directory. Serving Sioux Falls and the surrounding Sioux Empire area in Southeastern South Dakota. Yankton, SD (57078) Conditions & Forecast : Weather Undergroundhttp://www.wunderground.com/US/SD/Yankton.htmlCurrent conditions & forecast for Yankton, SD (57078) from the Weather Underground.Fri, 04 Aug 2006 06:28:50 GMT