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Numerical Modelling & Forecast Analysis

A place to compare global forecast outputs using our interactive maps and meteograms, discuss the meteoblue Learning MultiModel, evaluate ensemble spreads, and beyond.

6 Topics 15 Posts
  • RRFS and REFS feeds are now on NOMADS

    rrfs refs nam nomads
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    TheRadarGuyT
    Just got the news that apparently RRFS is being delayed again, now to November 3rd. https://www.weather.gov/media/notification/pdf_2026/scn26-048_Updated_RRFS_and_REFS_Implementation_aae.pdf https://www.weather.gov/media/notification/pdf_2026/scn26-47_Updated_Retirement_of_NAM_SREF_HREF_HiresW_NAM_MOS_aac.pdf https://www.weather.gov/media/notification/pdf_2026/scn26-89_RRFS_Downstream.pdf
  • Forecast model comparison - which one is the most reliable?

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    P
    My Trust in Weather Models for the North/Baltic Sea Region For my region along the North and Baltic Seas, I primarily rely on the ICON-D2 model. It offers the highest resolution and is particularly well-suited for local weather conditions—perfect for accurate forecasts along our coasts. If I need to look further ahead or consider areas outside the ICON-D2 coverage, I turn to ICON-EU, which is also highly reliable. An interesting alternative is Meteoblue AI, which performs very well in many situations. However, I still prefer the ICON models as my go-to choice and compare them with Meteoblue AI when needed to get an even better picture. What are your experiences with these models? Are there any others you particularly trust in our region?
  • ICON-CH1/2-EPS 2026-08-12 Update

    meteoswiss icon-ch update
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  • Stueve-Diagram

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    Miloslav TlamichaM
    Hello, and thank you for your question. The cloud cover percentage shown in the left column of the Stueve diagram represents total cloud cover, divided into low, mid, and high cloud layers, and does not specifically isolate convective clouds. Convective clouds are treated as a separate variable in meteoblue data and are not included in the total cloud cover percentage. However, the Stueve diagram does include convective parameters such as convective updraft in the point+ subscription. Additionally, convective cloud base, top, and vertical extent are available separately in meteoblue forecasts and APIs. We hope we were able to answer your questions and wish you pleasant weather with meteoblue.
  • Nowcasting vs. Forecasting

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    Miloslav TlamichaM
    @Wettergucker said in Nowcasting vs. Forecasting: Nowcast : Wetter heute, Radar, Satellit plus auf Windy je nach Wetterlage aktuelle Radiosondenaufstiege und aktuelle Parameter Wetterstationen Vorhersage: MUltimodell für Niederschlag, Temperatur oder Wind . Unter Luftfahrt: Air-Diagramm, sowie die Wetterkarten je nach Wetterlage mit entsprechenden Parameter die für mich sinnvoll sind für die Outdooraktivität. In der Mittelfrsit ab Tag 5 auch die Trefferwahrhscheinlichkeit der Prognose You are a meteorology pro, no doubt about that! :)
  • 20 degree temperature drop in one day in Northern USA

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