How can I process my UPP Grib2 output to another grid or projection?

I'd like to re-grid my UPP Grib2 output data. How can I process it to another grid or projection?

For re-gridding Grib2 unipost output, the wgrib2 utility can be used. Complete documentation on grid specification with examples of re-gridding for all available grid definitions can be found at:

https://www.cpc.ncep.noaa.gov/products/wesley/wgrib2/new_grid.html

An example of how operations use wgrib2 to interpolate to a lat-lon grid is given in the "Examples of wgrib2" section of the UPP User's Guide for v4.1. https://dtcenter.org/sites/default/files/community-code/upp-users-guide-v4.1.pdf