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These products display cloud-related fields from the model in a format that is very familiar to forecasters and that they are used to interpreting. They can easily be compared to actual satellite imagery...

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The simulated water vapour images generally focus on the upper troposphere. These charts can often indicate dynamical forcing mechanisms (responsible for cyclogenesis) or convective development (related to potential instability)...

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These diagrams compare Continuous Ranked Probability Skill Scores (CRPSS) of ECMWF with ...

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These diagrams compare the Brier Skill Scores (BSS) and the  Continuous Ranked Probability ...

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Snow depth is computed using two model parameters - these represent the liquid water equivalent of snow lying on the ground, and the average density of that snow layer...

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Soil moisture handling in the model is complex, and could be highlighted in many ways. Here a 'relativistic' approach is used for display, showing not absolute values, but instead...

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Specific humidity gives an indication of the amount of moisture within a sample of air (in g of water vapour within a kg of air, g kg⁻¹). The chart shows the specific humidity at 1000 hPa and 925 hPa levels and...

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These reliability diagrams show the ensemble spread of different global models for temperature ...

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This chart shows the 7-day mean anomalies of four forecast parameters for the Sub-seasonal range ...

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CAMS sulphur dioxide forecasts

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Sunshine for any point is assessed using the model representation of cloud layers to decide how much direct solar (shortwave) radiation reaches the Earth's surface...

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This chart shows probabilities for the 7-day mean anomalies of surface temperature to be in ...

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This chart shows probabilities that 7-day mean surface temperatures (from the 101 forecast ...

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This chart shows 7-day mean anomalies of surface temperature from the ECMWF Sub-seasonal range ...

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CAMS UV index forecasts

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**Note:** In **June 2023** ECMWF implemented a **major upgrade ...**

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These diagrams compare recent ECMWF verification scores for Mean Sea Level Pressure with ...

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These diagrams compare recent ECMWF verification scores for 500 hPa height with those of other ...

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This diagram shows mean and standard deviation of errors in the HRES forecasts for several ...

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The Vertical Profiles display the vertical structure of the forecast model atmosphere in a familiar user friendly way. The vertical structure of temperatures (red) dewpoints (green) and dewpoint depressions (blue) from each ENS member ...

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Predicting near surface visibility is dependent on predicting the correct dynamic and thermodynamic conditions in the boundary layer which can be highly variable. Fog is an extremely important weather hazard...

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The movement or transfer of vorticity helps in the assessment of vertical motion of air (ascent) in the troposphere. Where a local vorticity maximum approaches an area there is a tendency for air to rise and where a local vorticity maximum moves ...

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Vorticity is the tendency of an air particle to rotate or circulate around a particular point. Relative Vorticity is a measure about a vertical axis of the local rotation or spin of the air relative...

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This diagram shows daily probabilities for four types of Euro-Atlantic weather regimes over ...

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**Note:** In **June 2023** ECMWF implemented a **major upgrade ...**

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