Virve Karsisto (FMI): FMI’s Road weather model and shadowing algorithm

WMO Satellite Skills

Virve Karsisto shows the road model FMI uses to forecast road conditions.


Finnish Meteorological Institute’s (FMI) road weather model has been in operational use over 20 years. The forecasts help in the road maintenance decision making and give useful information for road users about the driving conditions. Recently, a shadowing algorithm has been implemented to the model to take in to account the shadowing caused by the surrounding objects. This helps to make more localized forecasts, as shadowing can cause great differences in road temperature even between different lanes.


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