Updating U.S. Precipitation Frequency Estimates for the Southeastern Region

The purpose of this study is to determine annual exceedance probabilities (AEP) and average recurrence intervals (ARI) for durations ranging from 5 minutes to 60 days and for ARIs from 1 to 1,000 years. The point estimates will be spatially interpolated to a spatial resolution of approximately 4km x 4 km. The study results will be published as volumes of the National Oceanic and Atmospheric Association's (NOAA's) Atlas 14, a wholly web-based publication available at www.nws.noaa.gov/ohd/hdsc. The publication will include the artifacts provided in Volumes 1 and 2, including access through the Precipitation Frequency Data Server, base grids in standard formats, electronic copies of maps, results of trend analyses, charts of seasonal distributions and probabilistic temporal distributions, and detailed documentation. Updated areal reduction factors are being developed as a separate appendix to NOAA Atlas 14 for the entire U.S., including Alaska. The project will review and process all reasonably available rainfall data. It is recognized that the rainfall data archived by NOAA's National Climatic Data Center (NCDC) may not be sufficient to accomplish the objectives of this project; therefore, other data available from sources such as State Climatologists and other Federal, State and local agencies will be examined and included, if appropriate. The state of the art techniques and processes developed and applied for NOAA Atlas 14 Volumes 1 and 2 will be applied. 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 a 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: $714254
  • Contract Numbers:


  • Sponsor Organizations:

    Georgia Department of Transportation

    600 West Peachtree Rd
    Atlanta, GA  United States  30308

    Mississippi Department of Transportation

    P.O. Box 1850
    Jackson, MS  United States  39215-1850

    Florida Department of Transportation

    Research Center
    605 Suwannee Street MS-30
    Tallahassee, FL  United States  32399-0450

    Alabama Department of Transportation

    1409 Coliseum Blvd.
    Montgomery, AL  United States  36130

    Southwest Florida Water Management District

    2379 Broad Street
    Brooksville, Florida  United States  34604-6899
  • Project Managers:

    Kerenyi, Kornel

  • Start Date: 20090410
  • Expected Completion Date: 0
  • Actual Completion Date: 20140930
  • Source Data: RiP Project 29754

Subject/Index Terms

Filing Info

  • Accession Number: 01563884
  • Record Type: Research project
  • Source Agency: Federal Highway Administration
  • Contract Numbers: TPF-5(175)
  • Created Date: May 23 2015 1:01AM