Many new features in 4.6.8 are, as usual, related to climatologies and regridding. ncclimo can now be given an explicit list of seasons to compute instead of, or in addition to, MAM,JJA,SON,DJF. ncremap has improved mask and format handling. There are also a collection of minor bugfixes and improvements, including JSON tweaks, ISO8601 printing, and GCC7 and netCDF 4.5.x compatibility.
This release includes an important ncwa fix that prevents incorrect answers when hyperslabs are used with masks and/or weights. Upgrade if you use ncwa with -d hyperslabs.