# HiRO-ACEv2 lets researchers generate 3 km climate data far cheaper

> The new model from Allen Institute and Hugging Face reproduces rare rain, wind and pressure events at 3 km resolution for about 1/300 the cost of the X‑SHiELD simulator.

Oossa · 2026-10-14 · https://oossa.com/en/hiro-acev2-lets-researchers-generate-3-km-climate-data-far-cheaper

Allen Institute and Hugging Face released HiRO-ACEv2, an update to their climate‑emulation system. The downscaling model now predicts rainfall, wind and pressure together and matches X‑SHiELD’s extreme‑event statistics within 3 %. A full year of global 3 km data can be produced for roughly 300 times less money than running X‑SHiELD, and even larger savings when only a region is needed.

## The facts

- Generates global 3 km climate data at about 1/300 the cost of X‑SHiELD.
- Matches high‑resolution extreme‑event statistics to within 3 %.

## Why it matters

Researchers can study decades of high‑resolution extreme weather without the huge computing budgets previously required.

## Sources & references

1. [HiRO-ACEv2: Simulating extreme weather at 3 km resolution for a fraction of the cost](https://huggingface.co/blog/allenai/hiro-acev2) – Hugging Face, 2026-10-14

Last updated: 2026-10-14