Basically, it suggests that the weather will be cold, (sometimes very cold), enough for snow in all parts of Scotland from Tuesday/Wednesday onwards. As mentioned above, the precipitation is not forecastable more that 24-48 hours out, so this will take care of itself, probaly in the form of showers generated by cold air blowing over the relitivley "warm" sea. The wind seems to generally be out the east and round to the north, so all aeras are likely to be exposed to the showers at some point. Much beond maybe 5 days again is a bit of a lottery even with wind direction, but the models at the moment suggest the wind continues from very cold sources throughout.(this will always change to some degree)
I am new to this aswell, but hope this helps a little