Here is the latest from the National Weather Service:
But, the above map may be very conservative. This tweet came in at 7pm CDT.
Don't consider this information merely "interesting." If you live anywhere near a river, I recommending you begin planning, perhaps by consulting your local emergency manager. Once these rivers begin flooding, they will stay above flood stage for a considerable period of time.
ADDITION: Just after I finished the above, the Governor of Nebraska issued a State of Emergency for Flooding for that state. [721p CST]
SECOND UPDATE: The snowpack in Breckenridge, Colorado, today as demonstrated by nephew Parker.