Anthropogenic climate change affects road weather conditions in the northern high latitudes. The expected warmer and wetter future climate implies new challenges for the road transportation sector. Therefore, it is
essential to estimate the impacts of climate change on road weather in the Nordic countries. For this purpose, we have set up a road weather model RoadSurf that utilizes meteorological data from a high-resolution regional climate model HARMONIE-Climate. As a first step, we investigated the skill of the road weather model to reproduce present-day road weather conditions in Finland. Simulated road surface temperatures were compared to observations between 2002 and 2014 at 25 road weather stations. RoadSurf accurately captured the characteristics of observed road weather implying this approach can be used to construct the present-day road weather climatologies as well as to study the impacts of climate change on road weather conditions in the study
area.

Road weather model RoadSurf driven by a regional climate model: evaluation and present-day road weather climatologies over Finland