Help file has not been fully updated since some new features have been added. New functions are (1) total rainfall for each calendar day, (2) maximum rainfall for given duration for each calendar day

Large dataset is also processed correctly. It may take up to a minute if data for 10 years is used.


Rainfall Return Periods and more


Compare maximum rainfall depths for given duration with SF SF Depth-Duration curves.
Result Table


  1. Input Data
  2. Select unit used in the original data.
  3. Select minute interval of the data was recorded.
  4. Select 1990 or 2003 IDF coefficients.
  5. Click Warm Up
  6. That should populate all gage names
  7. Select one or more gages
  8. Click Analyze
  9. Result Tables will be created.

  • Options
  • Limitations

    Updated Jan 2017

    Updated Dec 2015

    Updated Dec 2014

    Updated Feb 2014

    Original Aug 2013

    Error possible

    Tested in Firefox only.

    For TSV data, do not use spaces in gage names in the header.

    Use only upto 24 hours of data.

    Date time format should be as shown in sample.

    Datetimes do not have to be sequential.

    Datetime without any rain value can be optionally excluded.


    CSV : Comma Separated Variables File

    TSV : Tab Separated Variables File


    Use at your own risk.

    Content and data is experimental and meant for academic purpose only.