9/9/2023 0 Comments Alula aba nega![]() ![]() The map on the side displays NMM models as red and NEMS models as black boxes. Meteoblue weather models cover most populated areas at high resolution (3-10km) and world wide at moderate resolution (30km). Third-party domains: As seen on most other websitesĮuropean Centre for Medium-Range Weather Forecasts (ECMWF) NMM is a regional weather model and highly optimised for complex terrain. NMM model family: the first weather model from meteoblue (operational since 2007). NEMS is a multi-scale model (used from global down to local domains) and significantly improves cloud-development and precipication forecast. NEMS model family: Improved NMM successors (operational since 2013). All meteoblue models are computed twice a day on a dedicated High Performance Cluster. Meteoblue operates a large number of weather models and integrates open data from various sources. The weather is simulated by solving complex mathematical equations between all grid cells every few seconds and parameters like temperature, wind speed or clouds are stored for every hour. Our models contain 60 atmospheric layers and reach deep into the stratosphere at 10-25 hPa (60km altitude). ![]() Each cell is about 4km to 40km wide and 100m to 2km high. A weather model divides the world or a region into small "grid-cells". Weather models simulate physical processes. ![]() In some cases, even different models may not detect such conditions. Such conditions are error prone and should be handled carefully. A cold front could arrive a few hours later or thunderstorms might or might not develop. While locally forecast precipitation does not occur, it might rain just a few kilometres away. These weather patterns are very difficult to forecast, vary in place and time or depend on local terrain. Low clouds and precipitation can rapidly develop there without being detected, and will then not be sufficiently considered in the weather model. Topography: Complex mountain terrain is very challenging for weather predictions.As a result, models may overestimate sunny conditions in areas prone to fog. Stratus clouds: Fog and low clouds are often invisible to most models and to satellites, and as such models may agree despite uncertainty.Thunderstorms: The exact placement and timing of thunderstorms are almost impossible to predict and the associated amount of precipitation or hail can vary significantly.Postpone important activities, if they depend strongly on weather.Check the progress of actual weather more frequently.Check forecast updates more frequently.Develop alternatives for your decisions, which are feasible with every possible weather development.Generally, the uncertainty of the forecast increases with the differences between models. Our Multi-Model diagram shows the weather forecast of multiple models from meteoblue and others, mostly national weather agencies. In such cases, the weather forecast is likely to change on a daily basis. It would be great to know in advance if the forecast is likely to be correct, but how? All weather forecasts are computed by computer models, and sometimes these differ significantly, which indicates uncertainty and difficulty to make an accurate forecast of the weather. The variables shown are from direct model output and not scaled to the exact altitude and position of the selected place.įrequently, forecasts are spot on, sometimes less accurate and a few times they are completely wrong. The background is light blue for clear sky, light grey for light clouds, and dark grey for strong clouds. Weather icons are used to display the predicted weather conditions in the third diagram.The bars get darker when more models predict precipitation. ![]() The second diagram shows precipitation amounts: Blue bars indicate precipitation in mm accumulated over one hour.The dashed line represents the average of all models. The time from sunrise to sunset is indicated in light yellow. The first diagram shows the predicted temperatures for each model.The legend next to the diagram has a list with the model names and the corresponding colours. Every model is assigned one colour that is used in all diagrams.Weather models comparison for Alula Aba Nega Airport Compare our forecasts with observational data for the last days with our Short-term Verification for Alula Aba Nega Airport. ![]()
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