Weather forecasting
= Weather forecasting
Weather forecasting estimates future meteorological conditions from observations and physical models. Numerical models use an approximate <initial condition> and equations of <fluid mechanics> to simulate future conditions; forecasters also compare model outputs and apply experience and research.https://www.weather.gov/rah/virtualtourforecast[National Weather Service, The forecast process]{ref} The <forecast horizon> describes how far ahead a prediction remains useful at a specified accuracy; <sensitive dependence on initial conditions> can limit detailed predictions under <deterministic evolution>.