Computer models use current weather conditions to project
how conditions will change in the coming hours and days.
The model output must be interpreted, since few normal
surface features are drawn on the maps. These are computer
projections and not always correct. These are good to
use for a guide but adaptations must be made.
The atmosphere or, more importantly, the change in
the atmosphere with time can be represented by mathematical
equations. The equations that represent the atmosphere
can be solved by computer models to predict the future
state of the atmosphere. Atmospheric models are not
perfect! They should be used by the forecaster to
aid in making a forecast, not used as a statement
of fact.
These maps display computer model forecasts of upper
air and surface conditions from 12 hours to 10 days
ahead based on the initial time. Models are run once
every 12 hours (6 AM and 6 PM). Data is usually available
5-6 hours after the initial time.
