Precipitation Intensity Estimates for a One-Year Recurrence Interval for the Continental United States

This dataset provides precipitation intensity estimates for a one-year recurrence interval for the Continental United States as cloud-optimized GeoTIFFs (COGs). The release includes COGs for 15-minute, 30-minute, and 60-minute rainfall durations, and the precipitation intensities for these durations are referred to as I15, I30, and I60, respectively. Each raster reports precipitation intensities in millimeters per hour for the associated rainfall duration. The majority of the data in each raster are reformatted from the National Oceanic and Atmospheric Administration (NOAA) Atlas 14. However, NOAA Atlas14 data was not available for Washington and Oregon at the time of processing, so data in these states were derived from NOAA Atlas 2. Please refer to the processing step metadata for the methodology used to derive precipitation intensity estimates from NOAA Atlas 2.

This release is intended to facilitate programmatic access to precipitation intensity estimates. This is supported by the COG format, which allows software tools to efficiently access the data over an internet connection. Each COG raster spans the continental United States at a nominal 790 x 925 meter resolution. The spatial reference is EPSG: 4326, which is often referred to as WGS-84. Each COG has float32 precision and the NoData value (NaN) indicates raster pixels that lack precipitation intensity data. The COG format uses deflate compression internally to reduce file size. As such, although each COG has a nominal file size of