Water Resources of the United States

Water-level Sensors

Found one of our sensors?

Click here to verify the USGS authenticity.

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.


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. Wisconsin streamgages saw floods in the 10- to 100-year range.

Streams in Iowa experienced major flooding, forcing evacuations of communities in the Cedar River basin, particularly along the Shell Rock River. 24 USGS streamgages exceeded the National Weather Service (NWS) flood stage in Iowa, with annual exceedance probabilities at less than 1% (greater than a 100-year flood). State disaster declarations were made for 13 Iowa counties. USGS personnel in Iowa installed backup stage sensors and a temporary streamgage to maintain the flow of data during this event.

Initial news reports in Minnesota included many inundated or washed out roads south of the Twin Cities from Waseca to Kenyon along the Zumbro River. There were also reports of mudslides. The USGS Minnesota Water Science Center dispatched crews to make discharge measurements and collect sediment samples.

In the News:

USGS Crews Measure Flooding in Northeast Iowa (9/23/2016) U.S. Geological Survey field crews are measuring flooding on the Cedar River and Shell Rock River in Northeast Iowa. High-flow measurements on these rivers are approaching levels observed in 2008...

flood photo

The Gazette (9/26/2016): USGS uses arsenal of river tools to monitor, predict water levels Gauges installed since 2008 help with accuracy, precision.

flood photo

Northfield News: UPDATE (9/24/2016): Northfield extends state of emergency; community prepared

flood photo

KCRG News: (9/26/2016): U.S. Geological Survey taking river measurements

USGS Home Water Climate Change Science Systems Ecosystems Energy, Minerals, & Env. Health Hazards USGS Intranet

Accessibility FOIA Privacy Policies and Notices

Take Pride in America logo USA.gov logo U.S. Department of the Interior | U.S. Geological Survey
URL: https://water.usgs.gov/floods/events/2016/sep_ncentral/
Page Contact Information: Water Webserver Team
Page Last Modified: Thursday, 02-Feb-2017 17:56:28 EST