Water Resources of the United States

Water-level Sensors

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Related Links

Archive of USGS Project Alert flood notices - local and regional flood briefs since 2008.
100-Year Flood--It's All About Chance - poster discussing the meaning and use of probability language in flood characterization.
Video: 2011: The Year of the Flood

State-based Flood Information

There is a USGS Water Science Center office in each State. Alabama Arkansas Georgia Illinois Indiana Kansas Louisiana Montana North Carolina North Dakota Oklahoma South Carolina Tennessee Wyoming Texas Alaska Arizona California Caribbean Colorado Connecticut Florida Hawaii Idaho Iowa Kentucky Maine Maryland-Delaware-D.C. Massachusettes Michigan Minnesota Mississippi Missouri Nebraska Nevada New Hampshire New Jersey New Mexico New York Ohio Oregon Pennsylvania Rhode Island South Dakota Utah Vermont Virginia Washington West Virginia Wisconsin

Click the map above to visit a State-specific flood page (if available), or check out one of these State flood databases:

Colorado Flood Database

Oklahoma Flood Database

USGS Contact Information

For questions related to this site or to contribute content, please email TODD KOENIG or BOB HOLMES.

USGS Flood Information   

The USGS provides practical, unbiased information about the Nation's rivers and streams that is crucial in mitigating hazards associated with floods. This site provides information about the USGS activities, data, and services provided during regional high-flow events, such as hurricanes or multi-state flooding events. The USGS response to these events is typically managed by the National Floods Specialist.


Persistent 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.

image of NWS rainfall map

December Rainfall: Warmer-than-usual winter temperatures and an infusion of warm tropical moisture in late December, 2015 created conditions for heavy, sustained rainfall across large sections of the central and southern United States, with many areas experiencing 12 inches of rain or more.

Click the image at left to see a larger version, or visit the National Weather Service AHPS website for more precipitation maps and river forecasts.

image of USGS WaterWatch map

Widespread Flooding: Flash floods that are normally confined to smaller regions were spread throughout large portions of the central and eastern United States. Runoff from these floods collected in the nation's tributaries and then concentrated into larger mainstem rivers. The USGS collected data from hundreds of special measurements and thousands of streamgaging stations, helping the National Weather Service to forecast river flooding and assisting the U.S. Army Corps of Engineers with reservoir management and water control.

Click the image at left to see a larger version, or visit USGS WaterWatch for current flood conditions and other tools to explore flood and drought.

photo of water quality sensor

Water Quality Monitoring: While flood levels are a primary concern, flooding also impacts water quality in ways that have short- and long-term impacts on drinking water and aquatic ecosystems. USGS collected water-quality samples from many sites to characterize changes in water quality...

Click the image at left to visit the USGS Continuous Water-Quality Monitoring website for the 2015/2016 winter flooding event.

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URL: https://water.usgs.gov/floods/events/2016/winter/
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Page Last Modified: Thursday, 02-Feb-2017 17:56:57 EST