Earlier this year an issue regarding point rain artefacts in our AIFS Single forecast model was identified and investigated. The underlying cause was identified and a new version of AIFS Single has been trained, which removes the point rain artefacts from the model.
This has been implemented as AIFS Single v1.1 on 31 July 2025 with the 06 UTC run.
For more details, see the P3 entry in the Known AIFS Single forecasting issues page here and the Implementation of AIFS Single model here.