The current supercomputer array at NOAA. Image supplied by NOAA.gov.
I have been meaning to share this new with you for weeks. The new supercomputers are not in production use as of now. The software is being ported over & there will be months of testing. The plan is for them to go into production forecasting in mid-2022.
That they went with Cray is understandable. They have been using Cray, a pioneer in supercomputers (if not ‘the pioneer’), since the 1970s. Their forecasting software is designed for Cray. I would assume that it would take considerable reprogramming to port it, optimized, for a different make of supercomputer.