Updating U.S. Precipitation Frequency Estimates for the Northeastern 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 National Oceanic and Atmospheric Administration (NOAA) 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 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: $789885
  • Contract Numbers:


  • Sponsor Organizations:

    Connecticut Department of Transportation

    2800 Berlin Turnpike
    Newington, CT  United States  06131

    Maine Department of Transportation

    16 Statehouse Station
    Augusta, ME  United States  04333

    New Hampshire Department of Transportation

    John O. Morton Building
    P.O. Box 483
    Concord, NH  United States  03302-0483

    Vermont Agency of Transportation

    1 National Life Drive
    Drawer 33
    Montpelier, VT  United States  5633

    New York State Department of Transportation

    50 Wolf Road
    Albany, NY  United States  12232

    Massachusetts Department of Transportation

    10 Park Plaza
    Boston, MA  United States  02116
  • Project Managers:

    Kerenyi, Kornel

  • Start Date: 20120801
  • Expected Completion Date: 0
  • Actual Completion Date: 20140930
  • Source Data: RiP Project 29829

Subject/Index Terms

Filing Info

  • Accession Number: 01566745
  • Record Type: Research project
  • Source Agency: Federal Highway Administration
  • Contract Numbers: TPF-5(249)
  • Created Date: Jun 22 2015 1:00AM