After large amounts of rain were measured across Arkansas on May 29th, some of the measurements taken along the Arkansas River have taken a larger shift, but crest projections remain roughly the same. The latest information from the National Weather Service about the current levels of the Arkansas River along with updated cresting details are available below. The current NWS projection map can be found here.
The Army Corps of Engineers has developed a map that predicts the amount of flooding certain areas will receive as a result of Arkansas River flooding. You can find that map here.