You might be interested in looking at the process that is used to produce a long term forecast that stays accurate for years rather than just days. Posted to the site is a daily forecast with a lead time of 26 months.
Also in the research section an explanation of the complete set of driving forces that run the natural climate variability factors, that need to be considered ahead of CO2, to get real answers.
Bringing order out of chaotic systems requires a perspective bigger than the problem to be solved. The current weather / climate debate is a prime example of trying to find order in a chaotic system, however we need to look beyond our own planet if we are to fully realize the effects on our atmosphere. Below is a short research paper regarding long-range weather forecasting and the cyclic patterns that drive our weather.
At the end of the last Ice Age, the people who lived on the haltingly retreating edge of the permafrost noticed the surges in the weather. Some of them noticed that there were long-term patterns in the advance and retreat of the ice, and a gradual shift toward warmer climes, that allowed them new and better lifestyles in the expanded habitable zones.
This pattern discovery gave them information that was helpful, encouraging them to look into the natural processes of every day life. Stonehenge were built, to find the connections between the interactions of the movement of the planets, sun and the moon. The builders of Stonehenge focused their attention on the Solar and Lunar declination and found several periods of the Earth and the Moon’s interactions with the rest of the solar system.
Current Forecasting Methods are Flawed
Click to read FULL article by Richard Holle