But national models go beyond there borders and usually have some modelling outside so the exchanges will cover quite a lot of the world. For example, the UK's

But national models go beyond there borders and usually have some modelling outside so the exchanges will cover quite a lot of the world. For example, the UK's metoffice has a low resolution medium term global model: https://www.metoffice.gov.uk/research/approach/modelling-systems/unified-model/weather-forecasting https://www.metoffice.gov.uk/research/approach/modelling-sys...