The Met Office launched its public announcement of a major scientific upgrade to its forecasting system on 9 February 2026, following the implementation of the new Operational Suite (OS47) in January 2026. The change is intended to provide more accurate weather information for residents in Swindon and across Wiltshire, giving people more time to prepare for heavy rain, strong winds and local flooding.
The upgrade runs on a new Microsoft Azure–based supercomputing service (integrating HPE/Cray high-performance hardware) provided under a UK government–backed partnership. This delivers substantially greater compute and data capacity than the previous system and allows the Met Office to run higher-resolution ensemble forecasts and incorporate more real-time observations.
Rather than solely shrinking grid boxes, the new science improves kilometre-scale forecasts and refines how the models represent clouds and rainfall within grid cells. That refinement helps forecasters better predict where intense downpours are likely to occur at neighbourhood scale — information that can be used to protect high-risk zones around Swindon such as the catchments for the River Cole and River Ray.
Improved Met Office data will feed into Environment Agency forecasting and the GOV.UK ‘Check for Flooding’ service, helping to protect homes and businesses in vulnerable places including the Greenbridge Industrial Estate.
Professor Simon Vosper, Executive Director of Science at the Met Office, said the upgrade has markedly improved rainfall forecasts and will make forecasts easier to interpret for the public. The aim is to provide guidance that is more relevant to daily life — for example, helping commuters plan journeys on routes such as the Great Western Way during storms.
Wiltshire & Swindon Prepared notes that Swindon regularly faces river and surface-water flooding when drainage systems are overwhelmed by intense downpours. The updated forecasting system is designed to reduce false alarms while ensuring that warnings are issued promptly when severe weather is truly likely.
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