They are a tool and should be used in conjunction with the forecaster's understanding of the changing weather patterns, as determined from a close examination of measured weather data to determine if the actual weather conditions are changing in the manner that computer models are predicting that the weather conditions will change.
(They; are; a tool) (computer models; are predicting; that the weather conditions will change) Context(computer models are predicting,List([262, 292))):(the weather conditions; will change; )
computer models are predicting,List([262, 292))
They computer models the weather conditions
are are predicting will change
a tool
that the weather conditions will change