The snow forecast percentage is generated by combining data from different computer models.
Will it snow today, tomorrow or the day after?
Will it snow during the following ten days?
The forecast above is for whether snow will fall. Determining if accumulations will occur is even more difficult.
A number of tools are available on the website to help, but for the next 5 days the UKV snow depth forecast charts may prove helpful.
If you are looking for more information consider checking out the Snow forecasting tools article.
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In the UK conditions are often marginal for snow and a number of variables need to align. For example, the upper level air must be cold enough.
If it isn't then precipitation will fall as rain or freezing rain regardless of how cold it is at the ground level.
Upper level air temperatures need to be at or below freezing point which is 0C (32F). That is most likely to happen when winds are blowing from a northerly or easterly direction.
Temperatures at the surface generally need to be at or below 2C (36F). However, it can snow when they are higher,
particularly in the spring when the air is often drier and the dew points are correspondingly lower.
A cold snap on its own is usually not enough for widespread snow because there also needs to be enough moisture in the air.
For example, a northerly wind often brings dry weather to southern Britain with snow showers
more likely in the north and around coastal counties.
In the UK snow is more likely to fall in the north and over higher ground.
The snow forecast updates four times each day.
It combines data from the Meteo France Arpege, NCEP Global Forecast System (GFS) and NCEP Global Ensemble Forecast System (GEFS).
If you would like more in-depth information consider checking our extense range of Numerical Weather Prediction model data
To check the complete weather forecast use the Place, postcode or geolocation options in the header.
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A huge range of charts and data is freely available.
Models include UK Met Office UKV and MOGREPS-G, ECMWF, NCEP GFS, Meteo France Arpege and Arome.