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100 years of scientific forecasting

The Met Office is celebrating a century of scientific forecasting. The Numerical Weather Prediction (NWP) forecast system used today results directly from experiments carried out in the trenches of the First World War.

Met Office mathematician Lewis Fry Richardson recognised that pre-First World War weather forecasting practices were fundamentally unscientific, merely matching current weather phenomena with historic records. While volunteering for the Friends Ambulance Unit at Passchendaele he conducted a series of weather experiments. 

Richardson broke new ground with a gridded approach to forecasting, and while it took him more than six weeks to calculate a six-hour forecast for a single location, this mathematical approach to weather forecasting has become the basis on which today’s forecasting system has been built. What took 6 weeks to produce 100 years ago can now be accessed in seconds via an app on our mobile phone.

Research, technological developments and advances in computer power have allowed forecast grid sizes to be cut (i.e. over the last 30 years our Global Model grid sizes have reduced from 90km down to 10km) and improvements in our forecast accuracy. Our four day forecast is now as accurate as our one day forecast was 30 years ago.

Met Office Deputy Director of Weather Science Dale Barker said “Recent significant improvements to our modelling and forecast system include increased resolution of our global models and a greater number of ensemble members to support forecasting for high impact events. We have also enhanced the physics in our UK models and added new hourly updates to the UK forecast from the first 12 hours.

Click here for full press release

 

Channel website: http://www.metoffice.gov.uk

Original article link: https://www.metoffice.gov.uk/news/releases/2017/100-years-of-scientific-forecasting

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