Unified Interior Regions

Region 6: Arkansas-Rio Grande-Texas-Gulf

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Filter Total Items: 141
Date published: November 30, 2018
Status: Active

Anadarko Basin Oil and Gas Assessments

The U.S. Geological Survey completed the following assessments of undiscovered oil and gas potential of the Anadarko Basin Province 5058.

     

    Date published: November 29, 2018
    Status: Active

    Gulf Coast Petroleum Systems Project - Research

    This site highlights the research on the processes that impact the formation, accumulation, occurrence, and alteration of hydrocarbon energy resources of the Gulf Coast of Mexico. The project also conducts assessments of undiscovered, technically recoverable hydrocarbon resources. The Gulf Coast Petroleum Systems Project focuses on the onshore and State waters portion of the Gulf Coast basin,...

    Date published: November 29, 2018
    Status: Active

    Bend Arch-Fort Worth Basin Oil and Gas Assessments

    The U.S. Geological Survey completed the following assessments of undiscovered oil and gas potential of the Bend Arch-Fort Worth Basin Province 5045, north-central Texas and southwestern Oklahoma.

    Date published: November 28, 2018
    Status: Active

    Natural Drought and Flood Histories from Lacustrine Archives

    Previous work performed as part of the USGS Holocene Synthesis project illuminated complex centennial-scale patterns of drought and wetter-than-average conditions across the North American continent interior during the past two millennia, where paleorecord data coverage is sparse.  In order to explain the patterns of naturally-occurring drought, floods, and storms for the past, identified by...

    Date published: November 1, 2018
    Status: Active

    Using Molecular Tools to Recalibrate Freshwater Mussel Taxonomy with a Focus on Imperiled Species

    Freshwater mussels of the family Unionidae, also known as naiads, pearly mussels, freshwater clams, or unionids, are a diverse group of bivalve mollusks that are distributed on every continent except Antarctica. Approximately 300 species are known from the United States, with most of this diversity residing in rivers of the Southeast where many endemic taxa have evolved.

    Date published: November 1, 2018
    Status: Active

    Permian Basin Oil and Gas Assessments

    The USGS has conducted several assessments of undiscovered oil and gas in formations in the Permian Basin of western Texas.  This inlcudes the following.

    Date published: August 9, 2018
    Status: Active

    Gulf Coast Petroleum Systems Project - Assessments

    This site highlights the assessments of the Gulf Coast Petroleum Systems Project.   Scientifically robust assessments of undiscovered, technically recoverable hydrocarbon resources are published in a variety of USGS publications.  This project also conducts research on the processes that impact the formation, accumulation, occurrence and alteration of hydrocarbon energy resources. The Gulf...

    Date published: July 17, 2018
    Status: Active

    Estimating Potential Effects on Streamflow from Nearby Wells in the Lower San Antonio River Basin

    The USGS Texas Water Science Center (TXWSC) developed a groundwater-flow model to estimate the potential for streamflow depletion in the Lower San Antonio River based on changes in groundwater pumping in the watershed. Results from the project can be used by the San Antonio River Authority (SARA) to better understand aquifer interactions with the river and potential groundwater pumping effects...

    Contacts: Linzy Foster
    Date published: July 16, 2018
    Status: Completed

    Pecos River Basin Salinity Assessment

    The USGS Texas Water Science Center assesssed salinity of the Pecos River Basin from Santa Rosa Lake, New Mexico to the confluence of Pecos River and Rio Grande, Texas. This assessment included an extensive literature review, compilation of previously published salinity related data, data gap analysis, additional data collection to fill data gaps, and identification of potential areas of...

    Contacts: Natalie Houston
    Date published: June 18, 2018
    Status: Active

    Using Unmanned Aerial Systems (UAS) Capabilities to Help Identify Hummock-Hollow Formation and Fragmentation in Critical Marsh Habitat for Mottled Ducks

    For many years, coastal marshes in Texas and Louisiana have served as critical habitat for the mottled duck (Anas fulvigula), which is considered a priority species in the Texas/Louisiana Gulf Coast area.

    Date published: June 8, 2018
    Status: Active

    Geographic Information System and Remote Sensing Support: Gulf Coast Joint Venture

    The Gulf Coast Joint Venture (GCJV) was established in 1988 as a result of the North American Waterfowl Management Plan, which espouses the restoration of continental waterfowl populations through conservation partnerships in priority habitat regions. Since that time GCJV partners have expanded their mission and purpose to include the provision of habitat to support other priority bird species...

    Filter Total Items: 40
    Date published: April 13, 2017

    Water-quality data for Oklahoma

    Current and historical water-quality data for Oklahoma.

    Date published: April 13, 2017

    Water-use data for Oklahoma

    Historical water-use data for Oklahoma.

    Date published: April 13, 2017

    Lake-level data for Oklahoma

    Real-time and historical lake-level data for Oklahoma.

    Date published: January 1, 2017

    Recent flow and stage for Oklahoma

    Access recent flood and stage data for streams and rivers throughout Oklahoma.

    Date published: August 4, 2016

    Prospect- and Mine-Related Features from U.S. Geological Survey 7.5- and 15-Minute Topographic Quadrangle Maps of the Western United States

    These data are part of a larger USGS project to develop an updated geospatial database of mines, mineral deposits and mineral regions in the United States. Mine and prospect-related symbols, such as those used to represent prospect pits, mines, adits, dumps, tailings, etc., hereafter referred to as “mine” symbols or features, are currently being digitized on a st

    Date published: April 20, 2016

    Structures Data

    USGS data portray selected structures data, including the location and characteristics of manmade facilities. Characteristics consist of a structure's physical form (footprint), function, name, location, and detailed information about the structure. The types of structures collected are largely determined by the needs of the disaster planning and response and homeland security organizations....

    Date published: April 19, 2016

    The United States Interagency Elevation Inventory (USIEI)

    The USIEI is a comprehensive, nationwide listing of known high-accuracy topographic and bathymetric data for the United States and its territories. The project is a collaborative effort of the USGS and NOAA with contributions from other federal agencies. The inventory supports the 3D Elevation Program and the Integrated Ocean and Coastal Mapping effort. This resource is updated in Spring and...

    Date published: April 19, 2016

    Elevation Data

    The 3DEP products and services available through The National Map consist of lidar point clouds (LPC), standard digital elevation models (DEMs) at various horizontal resolutions, elevation source and associated datasets, an elevation point query service and bulk point query service. All 3DEP products are available, free of charge and without use restrictions.

    Date published: April 12, 2016

    Orthoimagery Data

    Orthoimagery data typically are high resolution aerial images that combine the visual attributes of an aerial photograph with the spatial accuracy and reliability of a planimetric map. The National Map offers public domain, 1-meter orthoimagery for the conterminous United States with many urban areas and other locations at 2-foot or finer resolution.

    Date published: April 12, 2016

    The National Map Small-Scale Collection

    The National Map offers a collection of small-scale datasets, most of which are at 1:1,000,000. The National Map publishes two data collections at one million-scale: one for Global Map users and one for National Map users. In terms of vector geometry, the lines, points, and areas in these data collections are identical. The difference is in the attributes assigned to these features.

    Filter Total Items: 1,611
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    Year Published: 2019

    Methods for estimating the magnitude and frequency of peak streamflows for unregulated streams in Oklahoma developed by using streamflow data through 2017

    The U.S. Geological Survey (USGS), in cooperation with the Oklahoma Department of Transportation, updated peak-streamflow regression equations for estimating flows with annual exceedance probabilities from 50 to 0.2 percent for the State of Oklahoma. These regression equations incorporate basin characteristics to estimate peak-streamflow magnitude...

    Lewis, Jason M.; Hunter, Shelby L.; Labriola, Laura G.
    Lewis, J.M., Hunter, S.L., and Labriola, L.G., 2019, Methods for estimating the magnitude and frequency of peak streamflows for unregulated streams in Oklahoma developed by using streamflow data through 2017 (ver. 1.1, March 2020): U.S. Geological Survey Scientific Investigations Report 2019–5143, 39 p., https://doi.org/10.3133/sir20195143.

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    Year Published: 2019

    Report of the River Master of the Delaware River for the period December 1, 2009–November 30, 2010

    A Decree of the Supreme Court of the United States, entered June 7, 1954, established the position of Delaware River Master within the U.S. Geological Survey. In addition, the Decree authorizes diversion of water from the Delaware River Basin and requires compensating releases from certain reservoirs, owned by New York City, to be made under the...

    Russell, Kendra L.; Ockerman, Darwin; Krejmas, Bruce E.; Paulachok, Gary N.; Mason,, Robert R.
    Russell, K.L., Ockerman, D., Krejmas, B.E., Paulachok, G.N., and Mason, R.R., Jr., 2019, Report of the River Master of the Delaware River for the period December 1, 2009–November 30, 2010: U.S. Geological Survey Open-File Report 2019–1093, 128 p., https://doi.org/10.3133/ofr20191093.

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    Year Published: 2019

    Pecos River Basin salinity assessment, Santa Rosa Lake, New Mexico, to the confluence of the Pecos River and the Rio Grande, Texas, 2015

    The elevated salinity of the Pecos River throughout much of its length is of paramount concern to water users and water managers. Dissolved-solids concentrations in the Pecos River exceed 3,000 milligrams per liter in many of its reaches in the study area, from Santa Rosa Lake, New Mexico, to the confluence of the Pecos River with the Rio Grande,...

    Houston, Natalie A.; Thomas, Jonathan V.; Ging, Patricia B.; Teeple, Andrew P.; Pedraza, Diana E.; Wallace, David S.
    Houston, N.A., Thomas, J.V., Ging, P.B., Teeple, A.P., Pedraza, D.E., and Wallace, D.S., 2019, Pecos River Basin salinity assessment, Santa Rosa Lake, New Mexico, to the confluence of the Pecos River and the Rio Grande, Texas, 2015: U.S. Geological Survey Scientific Investigations Report 2019–5071, 75 p., https://doi.org/10.3133/sir20195071.

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    Year Published: 2019

    Peak streamflow and stages at selected streamgages on the Arkansas River in Oklahoma and Arkansas, May to June 2019

    As much as 22 inches of rain fell in Oklahoma in May 2019, resulting in historic flooding along the Arkansas River in Oklahoma and Arkansas. The flooding along the Arkansas River and its tributaries that began in May continued into June 2019. Peaks of record were measured at 12 U.S. Geological Survey (USGS) streamgages on various streams in...

    Lewis, Jason M.; Trevisan, Adam R.
    Lewis, J.M., and Trevisan, A.R., 2019, Peak streamflow and stages at selected streamgages on the Arkansas River in Oklahoma and Arkansas, May to June 2019: U.S. Geological Survey Open-File Report 2019–1129, 10 p., https://doi.org/10.3133/ofr20191129.

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    Year Published: 2019

    Potentiometric surface of groundwater-level altitudes near the planned Highway 270 bypass, east of Hot Springs, Arkansas, July–August 2017

    The Ouachita Mountains aquifer system potentiometric-surface map is one component of the Hot Springs Bypass Groundwater Monitoring Project. The potentiometric-surface map provides a baseline assessment of shallow groundwater levels and flow directions before the construction of the Arkansas Department of Transportation planned extension of the...

    Nottmeier, Anna M.; Hays, Phillip D.
    Nottmeier, A.M., and Hays, P.D., 2019, Potentiometric surface of groundwater-level altitudes near the planned Highway 270 bypass, east of Hot Springs, Arkansas, July–August 2017: U.S. Geological Survey Scientific Investigations Map 3444, 13 p., 1 sheet, https://doi.org/10.3133/sim3444.

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    Year Published: 2019

    Groundwater availability in the Ozark Plateaus aquifer system

    Executive SummaryThe study described in this report, initiated by the U.S. Geological Survey in 2014, was designed to evaluate fresh groundwater resources within the Ozark Plateaus, central United States, as an area within a broader national assessment of groundwater availability. The goals of the Ozark study were to evaluate historical effects of...

    Clark, Brian R.; Duncan, Leslie L.; Knierim, Katherine J.
    Clark, B.R., Duncan, L.L., and Knierim, K.J., 2019, Groundwater availability in the Ozark Plateaus aquifer system: U.S. Geological Survey Professional Paper 1854, 82 p., https://doi.org/10.3133/pp1854.

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    Year Published: 2019

    Withdrawal and consumption of water by thermoelectric power plants in the United States, 2015

    The U.S. Geological Survey has developed models to estimate thermoelectric water use based on linked heat and water budgets. The models produced plant-level withdrawal and consumption estimates using consistent methods for 1,122 water-using, utility-scale thermoelectric power plants in the United States for 2015. Total estimated withdrawal for...

    Harris, Melissa A.; Diehl, Timothy H.
    Harris, M.A., and Diehl, T.H., 2019, Withdrawal and consumption of water by thermoelectric power plants in the United States, 2015: U.S. Geological Survey Scientific Investigations Report 2019–5103, 15 p., https://doi.org/10.3133/sir20195103.

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    Year Published: 2019

    Status of groundwater-level altitudes and long-term groundwater-level changes in the Chicot, Evangeline, and Jasper aquifers, Houston-Galveston region, Texas, 2019

    Since the early 1900s, most of the groundwater withdrawals in the Houston-Galveston region, Texas, have been from the three primary aquifers that compose the Gulf Coast aquifer system—the Chicot, Evangeline, and Jasper aquifers. Withdrawals from these aquifers are used for municipal supply, commercial and industrial use, and irrigation. This...

    Braun, Christopher L.; Ramage, Jason K.; Shah, Sachin D.
    Braun, C.L., Ramage, J.K., and Shah, S.D., 2019, Status of groundwater-level altitudes and long-term groundwater-level changes in the Chicot, Evangeline, and Jasper aquifers, Houston-Galveston region, Texas, 2019: U.S. Geological Survey Scientific Investigations Report 2019–5089, 18 p., https://doi.org/10.3133/sir20195089.

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    Year Published: 2019

    Potentiometric surface of the Mississippi River Valley alluvial aquifer, spring 2016

    A potentiometric surface map for spring 2016 was created for the Mississippi River Valley alluvial (MRVA) aquifer using selected available groundwater-altitude data from wells and surface-water-altitude data from streamgages. Most of the wells were measured annually or one time after installation, but some wells were measured more than one time or...

    McGuire, Virginia L.; Seanor, Ronald C.; Asquith, William H.; Kress, Wade; Strauch, Kellan R.
    McGuire, V.L., Seanor, R.C., Asquith, W.H., Kress, W.H., and Strauch, K.R., 2019, Potentiometric surface of the Mississippi River Valley alluvial aquifer, spring 2016: U.S. Geological Survey Scientific Investigations Map 3439, 14 p., 5 sheets, https://doi.org/10.3133/sim3439.

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    Year Published: 2019

    Emerging contaminants in groundwater, karst, and the Edwards Aquifer

    Karst aquifers have hydrogeologic characteristics that render them uniquely vulnerable to contamination from emerging contaminants (ECs). ECs comprise numerous chemical groups, including pharmaceuticals, personal-care products, flame retardants, perfluorinated and polyfluorinated compounds, nanoparticles and microplastics. Many ECs have sources,...

    Mahler, Barbara; Musgrove, Marylynn

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    Year Published: 2019

    Flood-inundation maps for a 23-mile reach of the Medina River at Bandera, Texas, 2018

    In 2018, the U.S. Geological Survey (USGS), in cooperation with the Bandera County River Authority and Groundwater District and the Texas Water Development Board, studied floods through the period of record to create a library of flood-inundation maps for the Medina River at Bandera, Texas. Digital flood-inundation maps for a 23-mile reach of the...

    Choi, Namjeong; Engel, Frank L.
    Choi, N., and Engel, F.L., 2019, Flood-inundation maps for a 23-mile reach of the Medina River at Bandera, Texas, 2018: U.S. Geological Survey Scientific Investigations Report 2019–5067, 15 p., https://doi.org/10.3133/sir20195067.

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    Year Published: 2019

    Flood warning toolset for the Medina River in Bandera County, Texas

    OverviewFloods are the most common natural disaster in the United States. The Medina River in Bandera County, Texas, is in the Edwards Plateau, where high-intensity rain rates and steep terrain frequently contribute to severe flash flooding capable of causing loss of life and property. For example, the July 5, 2002, flood claimed a total of 12...

    Engel, Frank L.; Choi, Namjeong
    Engel, F.L., and Choi, N., 2019, Flood warning toolset for the Medina River in Bandera County, Texas: U.S. Geological Survey Fact Sheet 2019–3043, 2 p., https://doi.org/10.3133/fs20193043.

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    Photograph showing swimming hole on Cypress Creek
    February 27, 2018

    Swimming hole on Cypress Creek in Blue Hole Regional Park, Wimberley

    Photograph showing swimming hole on Cypress Creek in Blue Hole Regional Park, Wimberley, Hays County, Texas (photograph by Allan K. Clark, U.S. Geological Survey, February 27, 2018).
    U.S. Geological Survey Scientific Investigations Map 3418, https://doi.org/10.3133/sim3418.

    Photograph showing pump hoist truck at Shavano Park at Fawn Drive
    December 31, 2017

    Pump hoist truck at Shavano Park at Fawn Drive

    Back cover photo from
    Opsahl, S.P., Musgrove, M., Mahler, B.J., and Lambert, R.B., 2018, Water-quality observations of the San Antonio segment of the Edwards aquifer, Texas, with an emphasis on processes influencing nutrient and pesticide geochemistry and factors affecting aquifer vulnerability, 2010–16: U.S. Geological Survey Scientific Investigations Report 2018–

    ...
    Photograph showing Groundwater sampling equipment at AY-68-27-610 (Parkwood Park)
    December 31, 2017

    Groundwater sampling equipment at AY-68-27-610 (Parkwood Park).

    Back cover photo from
    Opsahl, S.P., Musgrove, M., Mahler, B.J., and Lambert, R.B., 2018, Water-quality observations of the San Antonio segment of the Edwards aquifer, Texas, with an emphasis on processes influencing nutrient and pesticide geochemistry and factors affecting aquifer vulnerability, 2010–16: U.S. Geological Survey Scientific Investigations Report 2018–

    ...
    Photograph showing Comal 1 spring run
    December 31, 2017

    Comal 1 spring run

    Back cover photo from
    Opsahl, S.P., Musgrove, M., Mahler, B.J., and Lambert, R.B., 2018, Water-quality observations of the San Antonio segment of the Edwards aquifer, Texas, with an emphasis on processes influencing nutrient and pesticide geochemistry and factors affecting aquifer vulnerability, 2010–16: U.S. Geological Survey Scientific Investigations Report 2018–

    ...
    Photograph showing nitrate sensor at the Frio River at Concan, Tex.
    December 31, 2017

    Nitrate sensor at the Frio River at Concan, Tex.

    Back cover photo from
    Opsahl, S.P., Musgrove, M., Mahler, B.J., and Lambert, R.B., 2018, Water-quality observations of the San Antonio segment of the Edwards aquifer, Texas, with an emphasis on processes influencing nutrient and pesticide geochemistry and factors affecting aquifer vulnerability, 2010–16: U.S. Geological Survey Scientific Investigations Report 2018–

    ...
    Photograph showing Comal spring run
    December 31, 2017

    Comal spring run

    Cover background photo from
    Opsahl, S.P., Musgrove, M., Mahler, B.J., and Lambert, R.B., 2018, Water-quality observations of the San Antonio segment of the Edwards aquifer, Texas, with an emphasis on processes influencing nutrient and pesticide geochemistry and factors affecting aquifer vulnerability, 2010–16: U.S. Geological Survey Scientific Investigations Report

    ...
    Photograph showing Frio Stilling well
    December 31, 2017

    Frio Stilling well

    Photo from pages 8 and 9 of
    Opsahl, S.P., Musgrove, M., Mahler, B.J., and Lambert, R.B., 2018, Water-quality observations of the San Antonio segment of the Edwards aquifer, Texas, with an emphasis on processes influencing nutrient and pesticide geochemistry and factors affecting aquifer vulnerability, 2010–16: U.S. Geological Survey Scientific Investigations Report

    ...
    Photograph showing dry Frio below Concan
    December 31, 2017

    Dry Frio below Concan

    Photograph from page 19 of
    Opsahl, S.P., Musgrove, M., Mahler, B.J., and Lambert, R.B., 2018, Water-quality observations of the San Antonio segment of the Edwards aquifer, Texas, with an emphasis on processes influencing nutrient and pesticide geochemistry and factors affecting aquifer vulnerability, 2010–16: U.S. Geological Survey Scientific Investigations Report

    ...
    Photograph showing Helotes flood
    December 31, 2017

    Helotes flood

    Page 67 photo from
    Opsahl, S.P., Musgrove, M., Mahler, B.J., and Lambert, R.B., 2018, Water-quality observations of the San Antonio segment of the Edwards aquifer, Texas, with an emphasis on processes influencing nutrient and pesticide geochemistry and factors affecting aquifer vulnerability, 2010–16: U.S. Geological Survey Scientific Investigations Report 2018–5060

    ...
    December 31, 2017

    Groundwater use from the Ozark Plateaus aquifer system, 1900 to 2010

    Groundwater use from the Ozark Plateaus aquifer system, 1900 to 2010” is a short video showing modeled groundwater withdrawal rates from the Ozark Plateaus aquifer system (Ozark system) in the central United States. The Ozark Plateaus Groundwater Availability Study aims to quantify current groundwater resources in the Ozark system, evaluate how these resources have changed

    A crest stage gage in Texas.
    November 17, 2017

    A crest-stage gage provides a one-time measure of a flood peak height.

    A Crest Stage Gage

    Here is a low-tech device made of solely of a metal pipe, a wooden pole, and crushed cork that is invaluable to providing a one-time measurement of the maximum height (stage) that a stream hits during a high-water event.

    Visit our

    ...
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    USGS scientists J. Alton Anderson and Carole D. Johnson prepare to collect a Nuclear Magnetic Resonance (NMR) log at a well.
    September 13, 2017

    Digital borehole geophysical logs and related data files are now easily accessible through GeoLog Locator a new web-based, map view and retrieval tool developed by the U.S. Geological Survey.

    USGS scientist David Rodriguez records high water marks from storm surge following Harvey near Corpus Christi, Texas. 
    September 8, 2017

    Editor’s note: this news release will be updated online with more information on the streamgage records being set in Texas as it becomes available.

    Rivers and streams reached record levels as a result of Hurricane Harvey’s rainfall, with about 40 U.S. Geological Survey streamgages measuring record peaks.

    Satellite captured image of the rapidly intensifying storm, Harvey
    September 8, 2017

    As Harvey’s record breaking rainfall and catastrophic flood waters recede in Texas and western Louisiana, U.S. Geological Survey teams are collecting high water marks, monitoring water levels and coastal change, retrieving storm tide sensors and collecting samples for water quality analysis.

    A USGS crew measures flood waters off a bridge.
    August 30, 2017

    To learn more about USGS’ role providing science to decision makers before, during and after Hurricane Harvey, visit the USGS Hurricane Harvey page.

    A USGS crew prepares to measure Hurricane Harvey floodwaters off of a bridge.
    August 29, 2017

    Reporters: Do you want to interview USGS scientists as they measure flooding? Please contact Jennifer LaVista or Lynne Fahlquist. 

    U.S. Geological Survey field crews are measuring record flooding in parts of south-central Texas following intense rainfall from Tropical Storm Harvey.

    A USGS crew prepares to measure Hurricane Harvey floodwaters off of a bridge.
    August 29, 2017

    Reporters: Do you want to interview USGS scientists as they measure flooding? Please contact Jennifer LaVista or Lynne Fahlquist. 

    U.S. Geological Survey field crews are measuring record flooding in parts of south-central Texas following intense rainfall from Tropical Storm Harvey.

    Satellite captured image of the rapidly intensifying storm, Harvey
    August 25, 2017

    To learn more about USGS’ role providing science to decision makers before, during and after Hurricane Harvey, visit the USGS Hurricane Harvey page.

    This is a screenshot of the USGS Coastal Change Hazards Portal, which shows current coastal impact projections for Hurricane Har
    August 25, 2017

    To learn more about USGS’ role providing science to decision makers before, during and after Hurricane Harvey, visit the USGS Hurricane Harvey page.

    UPDATE: This story has been revised to reflect new NOAA-National Hurricane Center storm surge projections which were released August 25 at 7 a.m.

    This is a screenshot of the USGS Coastal Change Hazards Portal, which shows current coastal impact projections for Hurricane Har
    August 24, 2017

    To learn more about USGS’ role providing science to decision makers before, during and after Hurricane Harvey, visit the USGS Hurricane Harvey page.

    UPDATE: This story has been revised to reflect new NOAA-National Hurricane Center storm surge projections which were released August 25 at 7 a.m.

    Satellite image of Hurricane Harvey
    August 24, 2017

    To learn more about USGS’ role providing science to decision makers before, during and after Hurricane Harvey, visit the USGS Hurricane Harvey page.

    Storm-tide sensors are being installed at key locations along the Texas Gulf Coast by the U.S. Geological Survey in advance of Hurricane Harvey.

    Filter Total Items: 102