Updating U.S. Precipitation Frequency Estimates for the State of Texas

The purpose of this study is to determine precipitation frequency estimates for the state of Texas for durations of 5-minute through 60-day at average recurrence intervals (ARIs) of 1-year through 1,000-year. The estimates and associated bounds of 90% confidence intervals will be provided at 30 arc-sec resolution (approximately 800 x 800 m; varies with latitude). The study results will be published as volumes of National Oceanic and Atmospheric Administration’s (NOAA) Atlas 14, a wholly web based publication available at www.nws.noaa.gov/ohd/hdsc. The publication will include the artifacts provided in previous NOAA Atlas 14 Volumes, including access through the Precipitation Frequency Data Server, base grids in standard formats together with error estimates, electronic copies of maps, charts of seasonal distributions and probabilistic temporal distributions of heavy precipitation, and detailed documentation. Updated areal reduction factors, which are needed to calculate analogous areal precipitation frequency estimates, will be developed as a separate appendix to NOAA Atlas 14 for the entire United States. They include regional frequency analysis based on L-moments including error estimates, a combination of PRISM based techniques and CRAB for spatial interpolation, techniques for the analysis of climatic trend, temporal distribution and seasonality, internal consistency checks and variety of automated processes designed to enhance productivity. Intermediate results in the form of hourly and daily estimates at several ARIs will be distributed for peer review as will the final documentation.


  • English


  • Status: Completed
  • Funding: $1005000
  • Contract Numbers:


  • Sponsor Organizations:

    Texas Department of Transportation

    125 E. 11th Street
    Austin, TX  United States  78701-2483

    Harris County Texas Flood Control District

    9900 Northwest Fwy
    Houston, TX  United States  77092

    Brazos River Authority

    4600 Cobbs Dr
    Waco, TX  United States  76710

    City of Austin, Watershed Protection Department

  • Project Managers:

    Kerenyi, Kornel

  • Start Date: 20211012
  • Expected Completion Date: 0
  • Actual Completion Date: 0
  • Source Data: RiP Project 40776

Subject/Index Terms

Filing Info

  • Accession Number: 01596612
  • Record Type: Research project
  • Source Agency: Federal Highway Administration
  • Contract Numbers: TPF-5(344)
  • Created Date: Apr 22 2016 9:33AM