December 2015 saw lots of flooding in the U.S. occurring.

ersistent precipitation accompanied by strong winds and tornadoes in some areas blanketed two large bands of area from Texas to Ohio and Mississippi to North Carolina. As the resulting large-scale flash flooding began to recede, the nation began 2016 with major floods in the Missouri, Ohio, and Mississippi River basins that set new records and exceeded the 1993 and 2011 floods in some locations. USGS scientists used the opportunity to study the differences between winter and summer flood dynamics.