ICON-CH1/2-EPS 2026-08-12 Update
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On 12 August 2026, with the 12 UTC forecast cycle, MeteoSwiss introduced changes to
the following components of its operational ICON model system: ICON-CH1-EPS, ICONCH2-EPS, and KENDA-CH1.
These changes will reduce systematic model errors in near-surface temperature and
relative humidity.
Users can expect the following changes to data quality:
– Reduction of systematic mean error (ME) as well as standard deviation of the error
(STDE) for near-surface temperature and relative humidity.
– Slightly improved uncertainty information for near-surface temperature and near-surface
dewpoint temperature.
– Removed "block-patterns" in direct solar radiation.
Users need to be aware of the following technical impacts of the changes:
– No user action required.Now that meteoblue is using these models, users should hopefully see some slight improvements in forecast accuracy in the region.
