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USGS Flood Information

Resources

This page presents USGS tools, websites, publications, and other resources for monitoring, studying, and communicating flood information. Choose a topic of interest from the menu bar below to filter resources by topic, or choose "All Flood Resources" to see all resources.

thumbnail linked to FloodWatch

Flood Watch

The USGS FloodWatch website is a map-based resource from USGS WaterWatch that gives users hourly visual updates for flood conditions at over 3000 locations across the United States. Click the map on the left to interact with the map or click here to learn how to use this map.

thumbnail linked to flood inundation mapper

USGS Flood Inundation Mapping Program

The USGS Flood Inundation Mapping Program (FIM) partners with local communities and other government agencies to develop and validate flood inundation map libraries. Click the title above to visit the USGS FIM website and learn more about available tools. Completed projects are collected on the USGS National Flood Inundation Mapper, brought to you by the USGS Wisconsin Internet Mapping Group (WiM). Click the image on the left to go straight to the Mapper.

thumbnail of USGS Short-Term Network Map

USGS Short-Term Network System

The USGS operates an event-based mobile storm-surge sensor network to capture information about coastal and inland storm tides. Click the title above to learn more about the USGS Short-Term Network, or click the image at left to go straight to the USGS public Short-Term Network Mapper.

Internal USGS users can login to the Short-Term Network application here.

thumbnail of USGS NWIS peak streamflow website

USGS Peak Streamflow Data

The National Water Information System (NWIS) is the USGS water data portal where you can find a wealth of historic and real-time data related to floods. Click the image at left or the title above to go to the NWIS website where you can query for peak streamflow data by station, State, or region. Or, click here to go to the main NWIS page for a broader range of data.

thumbnail of USGS WaterAlert website

USGS WaterAlert

Select your favorite USGS streamgage from the USGS WaterAlert map, then set water stage or streamflow thresholds to receive instant notifications sent to your email address or mobile device. Click the image at left or the title above to go to the map and select your site(s).

thumbnail of USGS WaterNow website

USGS WaterNow text service

Want to know what's happening right now? Request real-time information from any USGS streamgage with the USGS WaterNow text service. This service responds to your text message with information about the current stage, streamflow, or other parameters collected at the gage. Click the image at left or the title above to learn how.

thumbnail of USGS Streamer website

Streamer

The USGS Streamer is a super-friendly interactive map that helps you explore America's larger streams by tracing upstream to their sources or downstream to where they empty. The map includes layers for weather radar and near-real-time streamflow conditions.

thumbnail linked to FloodWatch

Flood Watch

The USGS FloodWatch website is a map-based resource from USGS WaterWatch that gives users hourly visual updates for flood conditions at over 3000 locations across the United States. Click the map on the left to interact with the map or click here to learn how to use this map.

thumbnail of example USGS reports

USGS Flood Reports

This website aggregates links to selected USGS reports which focus on floods and flood-related research.

thumbnail linked to flood inundation mapper

USGS Flood Inundation Mapping Program

The USGS Flood Inundation Mapping Program (FIM) partners with local communities and other government agencies to develop and validate flood inundation map libraries. Click the title above to visit the USGS FIM website and learn more about available tools. Completed projects are collected on the USGS National Flood Inundation Mapper, brought to you by the USGS Wisconsin Internet Mapping Group (WiM). Click the image on the left to go straight to the Mapper.

thumbnail of USGS StreamStats website

StreamStats

The USGS StreamStats website is a GIS-based web tool for estimating streamflows at gaged and ungaged locations. Features similar to the NSS program are presented to users with no programs to install. Users can visit the StreamStats website linked here and click on a stream location on the interactive map to compute estimated streamflows for floods and other statistics. Additional statistics at gaged locations are also presented.

thumbnail of USGS WaterAlert website

USGS WaterAlert

Select your favorite USGS streamgage from the USGS WaterAlert map, then set water stage or streamflow thresholds to receive instant notifications sent to your email address or mobile device. Click the image at left or the title above to go to the map and select your site(s).

thumbnail of USGS WaterNow website

USGS WaterNow text service

Want to know what's happening right now? Request real-time information from any USGS streamgage with the USGS WaterNow text service. This service responds to your text message with information about the current stage, streamflow, or other parameters collected at the gage. Click the image at left or the title above to learn how.

thumbnail of USGS Streamer website

Streamer

The USGS Streamer is a super-friendly interactive map that helps you explore America's larger streams by tracing upstream to their sources or downstream to where they empty. The map includes layers for weather radar and near-real-time streamflow conditions.

thumbnail of USGS 100-yr-flood poster

Poster: 100-Year Flood--It's All About Chance

How can a 100-year flood strike twice in 15 years? This is a downloadable poster discussing the meaning and use of probability language in flood characterization.

thumbnail of USGS flood anatomy video

Video: The Anatomy of Floods

Dr. Robert Holmes discusses causes and effects of flooding, including a look at aspects of the 2011 epic flooding, and how USGS science assists in the overall flood mitigation efforts of the United States.

thumbnail of example USGS reports

USGS Flood Reports

This website aggregates links to selected USGS reports which focus on floods and flood-related research.

thumbnail of USGS Short-Term Network Map

USGS Short-Term Network System

The USGS operates an event-based mobile storm-surge sensor network to capture information about coastal and inland storm tides. Click the title above to learn more about the USGS Short-Term Network, or click the image at left to go straight to the USGS public Short-Term Network Mapper.

Internal USGS users can login to the Short-Term Network application here.

thumbnail of USGS NWIS peak streamflow website

USGS Peak Streamflow Data

The National Water Information System (NWIS) is the USGS water data portal where you can find a wealth of historic and real-time data related to floods. Click the image at left or the title above to go to the NWIS website where you can query for peak streamflow data by station, State, or region. Or, click here to go to the main NWIS page for a broader range of data.

thumbnail of USGS Indirect Measurement website

Indirect Measurement Guidelines

A one-stop shop to learn about USGS policies and methods for making indirect measurements of past flood events.

thumbnail of USGS flood anatomy video

Video: The Anatomy of Floods

Dr. Robert Holmes discusses causes and effects of flooding, including a look at aspects of the 2011 epic flooding, and how USGS science assists in the overall flood mitigation efforts of the United States.

thumbnail linked to flood inundation mapper

USGS Flood Inundation Mapping Program

The USGS Flood Inundation Mapping Program (FIM) partners with local communities and other government agencies to develop and validate flood inundation map libraries. Click the title above to visit the USGS FIM website and learn more about available tools. Completed projects are collected on the USGS National Flood Inundation Mapper, brought to you by the USGS Wisconsin Internet Mapping Group (WiM). Click the image on the left to go straight to the Mapper.

thumbnail of USGS Short-Term Network Map

USGS Short-Term Network System

The USGS operates an event-based mobile storm-surge sensor network to capture information about coastal and inland storm tides. Click the title above to learn more about the USGS Short-Term Network, or click the image at left to go straight to the USGS public Short-Term Network Mapper.

Internal USGS users can login to the Short-Term Network application here.

thumbnail of USGS PeakFQ program

USGS At-Site Peak Flood Frequency Computation Program (PeakFQ)

PeakFQ implements both the Bulletin 17B and Expected Moments Algorithm (EMA) procedures for flood-frequency analysis of peak streamflow records, providing estimates of flood magnitudes and their corresponding variance for a range of 15 annual exceedance probabilities. PeakFQ reads annual peaks in the standard peakfq (WATSTORE) text format available from NWISWeb

thumbnail of USGS NSS program

USGS National StreamFlow Statistics Program (NSS)

USGS researchers across the nation have developed equations for estimating flood streamflows as well as other statistics at ungaged sites. These equations are collected for easy access and computation through the downloadable NSS program and the associated NSS/StreamStats database. Users can download the NSS program and database from the NSS website linked here. Users will also find reports detailing the development and proper use of every equation in the NSS/StreamStats database.

thumbnail of USGS StreamStats website

StreamStats

The USGS StreamStats website is a GIS-based web tool for estimating streamflows at gaged and ungaged locations. Features similar to the NSS program are presented to users with no programs to install. Users can visit the StreamStats website linked here and click on a stream location on the interactive map to compute estimated streamflows for floods and other statistics. Additional statistics at gaged locations are also presented.

thumbnail of USGS SWSTAT program

USGS Surface Water Statistics Program (SWSTAT)

The USGS SWSTAT program contains a number of options for statistically analyzing time-series data. Output options include minimum, maximum, mean, and standard deviation of a time-series, as well as flow-duration analyses, log-Pearson Type III frequency analyses, trends, and others using standard textbook procedures. Click the title above or the image at left to go to the SWSTAT website.

thumbnail of USGS 100-yr-flood poster

Poster: 100-Year Flood--It's All About Chance

How can a 100-year flood strike twice in 15 years? This is a downloadable poster discussing the meaning and use of probability language in flood characterization.

thumbnail of example USGS reports

USGS Flood Reports

This website aggregates links to selected USGS reports which focus on floods and flood-related research.

thumbnail linked to flood inundation mapper

USGS Flood Inundation Mapping Program

The USGS Flood Inundation Mapping Program (FIM) partners with local communities and other government agencies to develop and validate flood inundation map libraries. Click the title above to visit the USGS FIM website and learn more about available tools. Completed projects are collected on the USGS National Flood Inundation Mapper, brought to you by the USGS Wisconsin Internet Mapping Group (WiM). Click the image on the left to go straight to the Mapper.

thumbnail of USGS Short-Term Network Map

USGS Short-Term Network System

The USGS operates an event-based mobile storm-surge sensor network to capture information about coastal and inland storm tides. Click the title above to learn more about the USGS Short-Term Network, or click the image at left to go straight to the USGS public Short-Term Network Mapper.

Internal USGS users can login to the Short-Term Network application here.

thumbnail of USGS PeakFQ program

USGS At-Site Peak Flood Frequency Computation Program (PeakFQ)

PeakFQ implements both the Bulletin 17B and Expected Moments Algorithm (EMA) procedures for flood-frequency analysis of peak streamflow records, providing estimates of flood magnitudes and their corresponding variance for a range of 15 annual exceedance probabilities. PeakFQ reads annual peaks in the standard peakfq (WATSTORE) text format available from NWISWeb

thumbnail of USGS SWSTAT program

USGS Surface Water Statistics Program (SWSTAT)

The USGS SWSTAT program contains a number of options for statistically analyzing time-series data. Output options include minimum, maximum, mean, and standard deviation of a time-series, as well as flow-duration analyses, log-Pearson Type III frequency analyses, trends, and others using standard textbook procedures. Click the title above or the image at left to go to the SWSTAT website.

thumbnail of USGS Indirect Measurement website

Indirect Measurement Guidelines

A one-stop shop to learn about USGS policies and methods for making indirect measurements of past flood events.

thumbnail linked to FloodWatch

Flood Watch

The USGS FloodWatch website is a map-based resource from USGS WaterWatch that gives users hourly visual updates for flood conditions at over 3000 locations across the United States. Click the map on the left to interact with the map or click here to learn how to use this map.

thumbnail of example USGS reports

USGS Flood Reports

This website aggregates links to selected USGS reports which focus on floods and flood-related research.

thumbnail linked to flood inundation mapper

USGS Flood Inundation Mapping Program

The USGS Flood Inundation Mapping Program (FIM) partners with local communities and other government agencies to develop and validate flood inundation map libraries. Click the title above to visit the USGS FIM website and learn more about available tools. Completed projects are collected on the USGS National Flood Inundation Mapper, brought to you by the USGS Wisconsin Internet Mapping Group (WiM). Click the image on the left to go straight to the Mapper.

thumbnail of USGS Short-Term Network Map

USGS Short-Term Network System

The USGS operates an event-based mobile storm-surge sensor network to capture information about coastal and inland storm tides. Click the title above to learn more about the USGS Short-Term Network, or click the image at left to go straight to the USGS public Short-Term Network Mapper.

Internal USGS users can login to the Short-Term Network application here.

thumbnail of USGS PeakFQ program

USGS At-Site Peak Flood Frequency Computation Program (PeakFQ)

PeakFQ implements both the Bulletin 17B and Expected Moments Algorithm (EMA) procedures for flood-frequency analysis of peak streamflow records, providing estimates of flood magnitudes and their corresponding variance for a range of 15 annual exceedance probabilities. PeakFQ reads annual peaks in the standard peakfq (WATSTORE) text format available from NWISWeb

thumbnail of USGS NSS program

USGS National StreamFlow Statistics Program (NSS)

USGS researchers across the nation have developed equations for estimating flood streamflows as well as other statistics at ungaged sites. These equations are collected for easy access and computation through the downloadable NSS program and the associated NSS/StreamStats database. Users can download the NSS program and database from the NSS website linked here. Users will also find reports detailing the development and proper use of every equation in the NSS/StreamStats database.

thumbnail of USGS StreamStats website

StreamStats

The USGS StreamStats website is a GIS-based web tool for estimating streamflows at gaged and ungaged locations. Features similar to the NSS program are presented to users with no programs to install. Users can visit the StreamStats website linked here and click on a stream location on the interactive map to compute estimated streamflows for floods and other statistics. Additional statistics at gaged locations are also presented.

thumbnail of USGS SWSTAT program

USGS Surface Water Statistics Program (SWSTAT)

The USGS SWSTAT program contains a number of options for statistically analyzing time-series data. Output options include minimum, maximum, mean, and standard deviation of a time-series, as well as flow-duration analyses, log-Pearson Type III frequency analyses, trends, and others using standard textbook procedures. Click the title above or the image at left to go to the SWSTAT website.

thumbnail of USGS NWIS peak streamflow website

USGS Peak Streamflow Data

The National Water Information System (NWIS) is the USGS water data portal where you can find a wealth of historic and real-time data related to floods. Click the image at left or the title above to go to the NWIS website where you can query for peak streamflow data by station, State, or region. Or, click here to go to the main NWIS page for a broader range of data.

thumbnail of USGS WaterAlert website

USGS WaterAlert

Select your favorite USGS streamgage from the USGS WaterAlert map, then set water stage or streamflow thresholds to receive instant notifications sent to your email address or mobile device. Click the image at left or the title above to go to the map and select your site(s).

thumbnail of USGS WaterNow website

USGS WaterNow text service

Want to know what's happening right now? Request real-time information from any USGS streamgage with the USGS WaterNow text service. This service responds to your text message with information about the current stage, streamflow, or other parameters collected at the gage. Click the image at left or the title above to learn how.

thumbnail of USGS Streamer website

Streamer

The USGS Streamer is a super-friendly interactive map that helps you explore America's larger streams by tracing upstream to their sources or downstream to where they empty. The map includes layers for weather radar and near-real-time streamflow conditions.

thumbnail of USGS Indirect Measurement website

Indirect Measurement Guidelines

A one-stop shop to learn about USGS policies and methods for making indirect measurements of past flood events.

thumbnail of USGS 100-yr-flood poster

Poster: 100-Year Flood--It's All About Chance

How can a 100-year flood strike twice in 15 years? This is a downloadable poster discussing the meaning and use of probability language in flood characterization.

thumbnail of USGS flood anatomy video

Video: The Anatomy of Floods

Dr. Robert Holmes discusses causes and effects of flooding, including a look at aspects of the 2011 epic flooding, and how USGS science assists in the overall flood mitigation efforts of the United States.

Other Notable Resources

(Note: Links to outside websites does not imply endorsement by the U.S. Geological Survey.)


For questions related to this site or to contribute content, please email Todd Koenig or Bob Holmes at the USGS Office of Surface Water.

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Page Last Modified: Monday, 10-Nov-2014 15:52:41 EST