Abstract: För att kunna planera vinterväghållningen på ett effektivt sätt krävs tillgång till en tillförlitlig prognos gällande temperatur och halka. Med hjälp av en bra prognos kan en god framförhållning erhållas, arbetet kan planeras och personalen kan arbeta under mindre stress.Abstract: It is of utmost importance to be able to predict the risk for slipperiness as winter measures represent very large costs. This means, that measures should only be carried out when they really are needed. There are currently various types of forecasts, which are used as tools, to determine risks for slipperiness and type measures. These forecasts do need however to be improved when it comes to accuracy and definition.