NOAA Atlas 14 Precipitation Frequency Estimates in GIS Compatible Format
This web page provides access to NOAA Atlas 14 precipitation frequency estimates (with upper and lower bounds of the 90% confidence interval) in GIS compatible format.
For Volumes 2 and 3, only partial duration series (PDS)-based grids are available for download;
annual maximum series (AMS)-based grids can be calculated by applying ratios from Table 4.6.2 from corresponding NOAA Atlas 14 documents.
For NOAA Atlas 14 Volume 1, and Volume 4 and above, both, AMS- and PDS-based grids are available for download. Please note that the precipitation frequency estimates for each volume of NOAA Atlas 14 were computed independently using all
available data at the time. Some discrepancies between volumes at
project boundaries are inevitable and they will generally be more
pronounced for rarer frequencies.
Zipped ASCII grids - These files contain the final, spatially interpolated, high-resolution NOAA Atlas 14 precipitation frequency estimates with confidence limits, and are the basis for the PFDS interface results. Please review the grid metadata (below) for projection, grid resolution, precipitation units, and other details.
cd pub/hdsc/data/xx/ (replace "xx" with an abbreviation, abbreviations can be found at the top of the page in parenthesis, i.e. "sw" for Semiarid and California)
Get
one file:
Example: mget orb100yr24ha.zip (this will download the 100-year 24-hour ArcInfo ASCII grid for the Volume 2: Ohio River Basin and Surrounding Areas)
Get several files
Example: mget orb*yr24ha.ver3.zip (The wildcard '*' in this case will get all frequencies for the 24-hour duration)
Quit
ftp:
quit
3) Via web browser:
alternatively you can peruse the ftp directory via a browser.
www.nws.noaa.gov
