Weather models are simulations of the future state of the atmosphere out through time. Millions of observations are used as initial conditions in trillions of calculations, producing a three dimensional picture of what the atmosphere might look like at some time in the future. Massive computers are used to do these calculations at incredibly fast speeds to enable simulations to cover the entire globe, and extend up to two weeks into the future. There are two general types of weather models, global models and regional models.
Global models produce forecast output for the whole globe, generally extending a week or two into the future. Regional models on the other hand have much higher resolutions, but only cover some part region of the globe, and only provide forecasts a couple days out in time. The advantage with these models is that their higher resolution lets them "see" features that the global models miss, most notably including thunderstorms. Many different national weather centers have supercomputers that run weather models.
Each of these is slightly different, using different equations to solve for various physical processes that shape our weather patterns. Credit: K. Cantner, AGI. If you are not a student of meteorology, you should rely on your local weather forecasters for a good weather forecast — and southern Wisconsin has some very good local forecasters. It is their job to interpret the various numerical weather prediction models. Numerical weather prediction models, or NWP, solve a complex set of mathematical equations that are based on the physics that drives how the air moves and how heat and moisture are exchanged throughout the atmosphere.
They are also known as the American and European models, respectively. The HRRR is a NOAA real-time 3-km resolution, hourly updated, cloud-resolving, convection-allowing atmospheric model, initialized by 3km grids with 3km radar assimilation.
Radar data is assimilated in the HRRR every 15 min over a 1-h period adding further detail to that provided by the hourly data assimilation from the 13km radar-enhanced Rapid Refresh. Arome is a small scale numerical prediction model, operational at Meteo-France since December WAM model from ECMWF that is run at an incredible 14 km resolution globally, and currently rated the best wave model from any national weather centre.
For the Offshore App we also supply the Arome and Hirlam models for Europe, as these models are well known and highly regarded. This data is only available in the Offshore App. Our goal is to provide the very best data, but not confuse customers with every weather model that is available. Many weather sites include the following models, as a long list of models looks impressive. Most marine forecasts give you a generalised wind forecast in the morning or the afternoon. PredictWind shows wind weather updates every hour, with a wind speed and direction map for your entire local area.
The detail you can see in the marine forecast can help you plan your trip or possibly help you win your next yacht race. Check our wind forecast coverage of your local area. By offering the leading global models, best regional models, and the high resolution PredictWind models, you can have a higher degree of confidence in the forecasts provided by PredictWind. The initial conditions files are entered into the model.
The files can be comparable to a 'photographic' snapshot that contains the current state of the Earth's atmosphere. PredictWind uses two sources for these files from the USA and Europe so you have a comparative result to give you confidence in the forecast.
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