Editing Forecasting (section)

===Performance limits of fluid dynamics equations===
As proposed by [[Edward Lorenz]] in 1963, long range weather forecasts, those made at a range of two weeks or more, are impossible to definitively predict the state of the atmosphere, owing to the [[chaos theory|chaotic nature]] of the [[fluid dynamics]] equations involved. Extremely small errors in the initial input, such as temperatures and winds, within numerical models double every five days.<ref>{{cite book|title=Storm Watchers|pages=[https://archive.org/details/stormwatcherstur00cox_df1/page/222 222–224]|year=2002|author=Cox, John D.|publisher=John Wiley & Sons, Inc.|isbn=978-0-471-38108-2|url-access=registration|url=https://archive.org/details/stormwatcherstur00cox_df1/page/222}}</ref>