The FMI Road Weather Model

Simulation of road surface temperature and estimation of road slipperiness is a classical application of physical meteorology treated e.g. in the COST-30 project already in the 1970's (Nysten, 1980). Since these times several European meteorological institutes have developed their own road weather services applying models with varying complexity. The model developments by Nysten and his colleagues at FMI did lead to an operational road weather service in the early 1980's, but it was later discontinued (Heikinheimo et al., 2000).