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- Forecast maximum 2m temperatures can be too low particularly during anomalously hot weather.
- If the predicted humidity is too low then maximum temperatures can be forecast to be too high.
- Post-processing (e.g. using a calibrated statistical technique) usually improves 2m temperature forecasts, sometimes substantially so.
- Model 2m temperature output corresponds to short grass cover (possibly snow-covered), because by meteorological convention observations are ordinarily made over such a surface. In This strategy may not work so well in:
- complex terrain - e.g. forests with clearings
- .
- over snow areas. The algorithm which derives 2m temperature uses the model surface temperature while the snow surface is above the earth's surface. This can be an important consideration where there is deep snow. See section on snow effects.
Diurnal Range of temperatures
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