Major Flood Events

In 2015, Dr. Robert Holmes, USGS National Flood Hazard Coordinator, took time to discuss some issues related to the flooding in South Carolina following the Appalachian Floods and Hurricane Joaquin.

Learn more about USGS flood activities related to the 2015 Appalachian Floods and Hurrican Joaquin. An upper atmospheric low-pressure system over the Southeast combined with moisture from Hurricane Joaquin off the Atlantic coast to create historic rainfall in early October, 2015, across South Carolina.

Learn more about USGS flood activities related to the August-September 2014 Floods, caused by heavy rains followed by remnants of Hurricane Odile which brought major flooding to parts of Arizona.

Hurricane Isaac was a Category 1 storm that made landfall in Louisana on August 28, 2012, causing tornadoes and widespread flooding in five states.

During and after Tropical Storm Lee, the USGS made stream flow measurements, sampled suspended sediment, and repaired gages in Connecticut, Maryland, Pennsylvania, Virginia, and other states in the region.

Learn more about USGS flood activities related to the 2017 Pacific Winter Floods caused by widespread rains across California and western Nevada.

Learn more about USGS flood activities related to the 2017 Midwest Spring Floods that occurred across large portions of Missouri, Illinois, Indiana, Ohio, Oklahoma, and Arkansas in late April and early May, 2017.

Learn more about USGS flood activities related to the September 2016 Northern Plains Floods when more than 12 inches of rain fell in northeast Iowa, southeast Minnesota, and southwest Wisconsin during a 24-hour period on September 22 and 23, 2016.

Learn more about USGS flood activities related to the January 2016 Noreaster which combined signifcant snowfall, high winds, and storm surge from Arkansas to Massachusetts.

Learn more about USGS flood activities related to the Summer 2015 Central Floods that occured when heavy rains caused flooding in four states in the central U.S.

Learn more about USGS flood activities related to the December 2014 Pacific Coast floods, which included flash floods, heavy snows, high winds, and mudslides throughout Oregon, Washington, and California.

Learn more about USGS flood activities related to the June 2014 Floods in South Dakota, Minnesota, and Iowa.