<div class="eI0"> <div class="eI1">Modèle:</div> <div class="eI2"><h2>FMI (Hirlam Model from finnish meteorological institute)</h2></div> </div> <div class="eI0"> <div class="eI1">Mise à jour:</div> <div class="eI2">4 times per day, from 08:00, 14:00, 20:00, and 00:00 UTC</div> </div> <div class="eI0"> <div class="eI1">Greenwich Mean Time:</div> <div class="eI2">12:00 UTC = 13:00 CET</div> </div> <div class="eI0"> <div class="eI1">Résolution:</div> <div class="eI2">0.068025° x 0.068025°</div> </div> <div class="eI0"> <div class="eI1">Paramètre:</div> <div class="eI2">Precipitation in mm (or litres per square metres)</div> </div> <div class="eI0"> <div class="eI1">Description:</div> <div class="eI2"> The precipitation map - updated every 6 hours - shows the modeled precipitation in mm. The precipitation areas are encircled by isohyets - lines with equal amounts of precipitation. However, modeling precipitation is still not very reliable. If you compare the modeled results with observed values you will realize that the model is nothing better than a first order approach. Yet this chart is of some use for forecasters.<br> Note: Based on international convention meteorologists use the metric system. 100 mm of precipitation is equivalent to roughly 4 inches. </div> </div> <div class="eI0"> <div class="eI1">FMI:</div> <a href="http://ilmatieteenlaitos.fi" target="_blank">FMI</a> <br> <div class="eI2"> At the Finnish Meteorological Institute, results from several numerical weather prediction models are utilized. Most of all, these include products from the European Centre of Medium Range Forecasts (ECMWF), located in Reading in the United Kingdom. For shorter range forecasts, more detailed forecasts are produced in-house using a limited area models (LAMs) called HIRLAM and HARMONIE, which are being developed by FMI as an international co-operation programme with a number of European countries.<br> </div></div> <div class="eI0"> <div class="eI1">NWP:</div> <div class="eI2">La prévision numérique du temps (PNT) est une application de la météorologie et de l'informatique. Elle repose sur le choix d'équations mathématiques offrant une proche approximation du comportement de l'atmosphère réelle. Ces équations sont ensuite résolues, à l'aide d'un ordinateur, pour obtenir une simulation accélérée des états futurs de l'atmosphère. Le logiciel mettant en œuvre cette simulation est appelé un modèle de prévision numérique du temps.<br><br> <br>Prévision numérique du temps. (2009, décembre 12). Wikipédia, l'encyclopédie libre. Page consultée le 20:48, février 9, 2010 à partir de <a href="http://fr.wikipedia.org/w/index.php?title=Pr%C3%A9vision_num%C3%A9rique_du_temps&oldid=47652746" target="_blank">http://fr.wikipedia.org/w/index.php?title=Pr%C3%A9vision_num%C3%A9rique_du_temps&oldid=47652746</a>.<br> </div></div> </div>