This data is input to these models which simulate the current weather patterns over North America and the entire Earth, then generate forecasts based on the current pattern, all using very complex physics to simulate the many processes at work.
(This data; is; input to these models) (these models; simulate; the current weather patterns over North America and the entire Earth) (forecasts; based; on the current pattern)
This data these models forecasts
is simulate based
input to these models
the current weather patterns over North America and the entire Earth
on the current pattern