Which of the following descriptions best represent the overarching design of your forecasting model?
- Machine learning-based weather prediction.
What techniques did you use to initialise your model? (For example: data sources and processing of initial conditions)
ECMWF ENS analysis for the Thursday 0z cycle. Pressure level and surface atmospheric variables.
If any, what data does your model rely on for real-time forecasting purposes?
only initial conditions from above
What types of datasets were used for model training? (For example: observational datasets, reanalysis data, NWP outputs or satellite data)
ERA5
point observation datasets like METAR
IFS ENS analysis
Please provide an overview of your final ML/AI model architecture (For example: key design features, specific algorithms or frameworks used, and any pre- or post-processing steps)
Transformer-based encode-process-decode architecture similar to the WeatherMesh-3 model
https://arxiv.org/pdf/2503.22235
Additionally adding a noise embedding and training with CRPS loss
This model is only trained on 3-hourly instantaneous or aggregate values for shorter lead times - we have rolled out the model to 32 days out, much longer than we expect it to be well-behaved, and then aggregated.
Have you published or presented any work related to this forecasting model? If yes, could you share references or links?
WeatherMesh-3 model is a previous iteration, published here
https://arxiv.org/pdf/2503.22235
Model code here https://github.com/windborne/weathermesh-3
Before submitting your forecasts to the AI Weather Quest, did you validate your model against observational or independent datasets? If so, how?
Validating on holdout ERA5 data
Validating historical forecasts against the observation data provided by WeatherQuest
Did you face any challenges during model development, and how did you address them?
No answer.
Are there any limitations to your current model that you aim to address in future iterations?
Training for longer lead times, incorporating more S2S-relevant input data
improving raw skill of ensemble mean, and better calibrating spread too
Are there any other AI/ML model components or innovations that you wish to highlight?
No answer.
Who contributed to the development of this model? Please list all individuals who contributed to this model, along with their specific roles (e.g., data preparation, model architecture, model validation, etc) to acknowledge individual contributions.
No answer.