Model:

Arpège(Action de Recherche Petite Echelle Grande Echelle) from Meteo France

Ανανέωση:
4 times per day, from 08:00, 14:00, 20:00, and 00:00 UTC
Μέσος χρόνος Γκρίνουιτς:
12:00 UTC = 14:00 EET
Resolution:
0.1° x 0.1° (Ευρώπη)
0.5° x 0.5°
Παράμετρος:
Kind of precipitation
Description:
kind of precipitation   Rain or shower? This chart shows the kind of precipitation that is likely to fall given the atmospheric and surface conditions at a certain place.

The following table explains the symbols:

Precipitation Light Moderate Heavy
Rain
Rain shower
Snow
Snow shower
Sleet
Freezing rain
Cloud Cover 0-2 3-4 5-7 8
(eights)
Arpège:
Arpège
ARPEGE uses a set of primitive equations with a triangular spectral truncation on the horizontal, with a variable horizontal resolution, with a finite elements representation on the vertical and a β€œsigma-pressure” hybrid vertical coordinate. It also utilizes a temporal two time level semi-implicit semi-lagrangian scheme. The horizontal resolution of the ARPEGE model is around 7.5km over France and 37km over the Antipodes. It has 105 vertical levels, with the first level at 10m above the surface and an upper level at around 70km. Its time step is of 360 seconds.
NWP:
Numerical weather prediction uses current weather conditions as input into mathematical models of the atmosphere to predict the weather. Although the first efforts to accomplish this were done in the 1920s, it wasn't until the advent of the computer and computer simulation that it was feasible to do in real-time. Manipulating the huge datasets and performing the complex calculations necessary to do this on a resolution fine enough to make the results useful requires the use of some of the most powerful supercomputers in the world. A number of forecast models, both global and regional in scale, are run to help create forecasts for nations worldwide. Use of model ensemble forecasts helps to define the forecast uncertainty and extend weather forecasting farther into the future than would otherwise be possible.

Wikipedia, Numerical weather prediction, http://en.wikipedia.org/wiki/Numerical_weather_prediction(as of Feb. 9, 2010, 20:50 UTC).