---
title: "Extreme Weather"
description: "1 posts about Extreme Weather, summarised, each linking to the original."
---

# Extreme Weather
> 1 posts about Extreme Weather, summarised, each linking to the original.

## Articles

### [HiRO-ACEv2: Simulating extreme weather at 3 km resolution for a fraction of the cost](https://yomu.fyi/post/hiro-acev2-simulating-extreme-weather-at-3-km-resolution-for-a-fractio.md)
- Company: [Hugging Face](https://yomu.fyi/company/hugging-face.md)
- Author: Kyle Wiggers
- Published: Oct 14, 2026
- Type: Announcement

HiRO-ACEv2 generates global 3 km climate data for extreme weather at roughly 1/300th the cost of the X-SHiELD model, with even larger savings for single-region runs. The system pairs a coarse 100 km AI model (ACE) with the new HiROv2 downscaler that simultaneously predicts rain, wind, and sea-level pressure instead of just rainfall, and has improved skill at reproducing extreme events. When fed coarsened X-SHiELD data HiROv2 matches the target’s high-resolution statistics within 3% for events as rare as one in a million data points, and accurately estimates tropical cyclone energy for storms never seen during training. Over a 10-year simulation the full system’s hurricane energy and extreme event snapshots compare well with X-SHiELD. However, HiRO cannot yet handle other climates because it depends on X-SHiELD-specific ACE tuning; future work includes training on warmer-world datasets and adding temperature and snow outputs.