Hugging Face says HiRO-ACEv2 simulates extreme weather at 3 km resolution

Hugging Face introduced HiRO-ACEv2, an update to the HiRO-ACE system that combines the ACE model at 100 km resolution with HiROv2, which adds detail at 3 km. The company says the system reproduces extreme rain, wind and pressure events—including events occurring once in every million data points—with statistics within 3% of X-SHiELD’s results. Generating global data would cost about 300 times less than using that high-resolution model, and more than 100 times less when only one region is needed.

Hugging Face says the system also generates cyclones with realistic eyes and rain bands, although winds and pressure around the eye remain more asymmetric. For now, HiRO-ACEv2 works only with the version of ACE tuned to X-SHiELD and cannot represent other climates, such as a future world 4°C warmer or the historical ERA5 record. The company plans to train it on new datasets and add near-surface temperature, snow and ice outputs.