Inside Spire’s AI-driven sub-seasonal-to-seasonal model
Forecast the season with confidence, weeks before your competitors
For energy or commodity traders, natural gas producers, agronomists, or government emergency or resource planners, the safety and security of your investment – whether in people or product – relies on weather forecasting.
Physics-based models lose forecast skill between weeks 3-6, a timeframe that is aptly named the “valley of uncertainty.” Spire’s AI-S2S model rewrites the outcome for customers who are prepared. AI-S2S runs a 200-member generative AI ensemble out to 46 days, trained on Spire’s own satellite data, and outperforms ECMWF by 14.76%* exactly where your next season’s book is exposed.
Register to join Spire scientists and engineers for a live look inside Spire AI-S2S. Our team will break down the methodology, the benchmarks, and what Spire AI-S2S means for planning further ahead in energy, agriculture, and government.
Register for the session that works best for you:
Who should attend a session?
If your P&L, your margin, your cargo or your supply commitment moves with the weather a month out, you’ll leave the session with insights on how to move quicker and more confidently than your competitors. The following individuals will specifically find this session helpful:
- Energy and commodity traders looking for a confident, consistent answer to “how cold, how likely, and for how long — four weeks out?”
- Government emergency managers looking to pre-position people and assets ahead of worst-case headlines instead of reacting to them.
- LNG traders and cargo optimization managers wanting to better estimate whether cargo travels east or west.
- Natural gas & propane producers who want answers to “do I fill storage now, or wait two more weeks?”
- Commodity & grain traders who are tracking weather across hemispheres and want to understand how global weather events reprice basis.
- Agronomists and digital ag product leads looking to plan field trafficability across fields.
- Energy planners looking to predict and forecast reserve across wind and solar generation.
- Insurance underwriters trying to price a season before it starts.
- Chief risk officers evaluating buying signals.
In each session we’ll cover the following, with localized market examples:
- What makes Spire AI-S2S different — model architecture, methodology, and independence of every public S2S model
- How it performs: accuracy benchmarks vs. ECMWF S2S*
- Real-world use cases across energy, agriculture, and government operations
- A live hindcast and data demo
- What’s coming next for AI-S2S and Spire’s AI forecast portfolio
- Q&A session
Our speakers

Tom Gowan, Ph.D.
Spire Director of AI and Engineering

Nachiketa Acharya, Ph.D.
Spire Senior AI Weather and Climate Scientist

Max Grover
Spire Senior Weather Software Engineer
*Spire conducted independent validation of data from its AI-S2S model, outside of the training and fine-tuning period, against ECMWF forecast data from January 1 – February 15, 2026. The ECMWF data used in this validation is published under a Creative Commons Attribution 4.0 International (CC BY 4.0) license. These results are based on data and products of the European Centre for Medium-Range Weather Forecasts (ECMWF) – ©2026 European Centre for Medium-Range Weather Forecasts (ECMWF). Source ecmwf.int