The north of the country is to be under a yellow “snow and ice” warning until 10am on Sunday - with separate warnings for wind, snow and rain issued for Monday.
The yellow warning for snow affects every region and will come into effect on Monday between 6am and 9pm.
Travellers are facing major disruption as CalMac cancelled ferry sailings on a number of routes, and train passengers also face heavy delays today.
The Met Office said some delays to road, rail, air and ferry transport are “likely”, as are delays for high-sided vehicles on exposed routes.
ScotRail said that it had lost power between Haymarket and Edinburgh Waverley, while the line between Stirling and Perth is closed due to flooding at Mill O’Keir viaduct.