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Note: HRES and Ensemble Control Forecast (ex-HRES) are scientifically, structurally and computationally identical.  With effect from Cy49r1, Ensemble Control Forecast (ex-HRES) output is equivalent to HRES output where shown in the diagrams.   At the time of the diagrams, HRES had resolution of 9km and ensemble members had a resolution of 18km.

Derivation of forecast screen level temperatures (T2m)

Model output of forecast of screen level temperatures (T2m) is not a direct output from the atmospheric model.  

Instead, screen level temperatures (T2m) are derived by interpolation between: 

  • the model forecast temperature at the lowest model level (L137 at 10m) and 
  • the model forecast temperature of the underlying surface (the skin temperature).  

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