Operational Suite 47 (OS47) represents the Met Office’s first major science upgrade to its numerical weather prediction systems in over three years, and the first delivered on its new supercomputing platform. OS47 includes significant scientific enhancements to both the global and regional atmospheric configurations, alongside the introduction of Mode‑S aircraft observations. Together, these changes impact key model systematic errors in ways that are expected to be noticeable to forecast users. Key improvements include an enhanced representation of cloud and microphysical processes, leading to more realistic precipitation structures.
This talk will present an overview of the scientific upgrades in the global and regional models and their impacts, drawing on both objective verification and subjective assessment, including perspectives from operational meteorologists.