Beter is om de situatie te bekijken: vrij veel en dikke hoge en middelhoge wolkenvelden (zie soundings) aanwezig. Ik zou dus uitgaan van minder dan 6u, en indien de zon schijnt zal het eerder om flauwe, fletse zonneschijn gaan.
Van de ECMWF confluence:
| M12. Systematic overestimates of "sunshine duration" | The IFS "sunshine duration" parameter can, in some regions and some scenarios, provide large overestimates of sunshine duration relative to what is measured by conventional instrumentation. This can be in spite of there being, at the same time, a correct representation of the downward solar radiation in the IFS. Examples of this behaviour have been noted in summer time in Switzerland. |