How the simulation is done

-  Information from the satellites/sensors sent to computer
-  This data is compared to information stored on files .....
-  ..... Which contain known weather patterns from past
-  ..... Predictions are made based on these comparisons
-  produces weather maps illustrating isobars, temperatures etc.
-  Computer can demonstrate graphically how weather (for example cloud formations) will change with time (that is predict weather patterns) - this is generally presented as a computer- generated video demonstrating how clouds build up, how pressure and temperature changes over, for instance, next 7 days, wind speeds etc.

This demonstrates isobars tracking across part of Europe. A computer simulation would show how areas of pressure change with time so it’s possible to predict rainfall, strong winds etc. in advance