I have often joked about this!
If the meteorological Department said today that it will rain, I would announce that it will be sunny today for sure!
And when they announce that it’ll be sunny, I would always take the umbrella!
This is actually not a joke. It’s a fact based on chaos theory!
Determined: A Science of Life Without Free Will is a book by Robert Sapolsky talks about the theory when you try to estimate the future weather.
So Chaos theory explains that weather is a highly sensitive, deterministic system, where small uncertainties in initial data grow exponentially, creating a limit to long-term predictability known as the “butterfly effect.”
While weather is predictable for only a few days, ensemble forecasting helps by mapping out possible future states.
Butterfly Effect was coined by Edward Lorenz and this concept highlights that tiny differences in initial atmospheric conditions—like a butterfly flapping its wings—can lead to vastly different weather outcomes, such as a storm forming or not. This also has been debated.
Edward Lorenz discovered this behavior in the 1960s when he noticed that re-entering data into his simulation with slightly fewer decimal places yielded entirely different results, proving that, despite deterministic laws, the atmosphere is inherently unpredictable!
Now the weather is not random, but it is chaotic. Due to the rapid growth of errors, accurate weather forecasting is limited to a few days.
Beyond roughly two to three weeks, precise daily forecasting is currently impossible!
Despite short-term unpredictability, atmospheric behavior follows patterns known as “attractors.” These represent typical seasonal climates or recurring, large-scale circulation patterns.
So instead of relying on a single model run, meteorologists run multiple simulations (an ensemble) with slightly altered initial conditions.
Probabilistic Forecasts of ensemble; If all 50+ members of an ensemble show rain, confidence is high. If they show different outcomes, confidence is low. This provides a “forecast of forecast skill”.
While tomorrow’s temperature can be predicted more or less accurately, predicting the exact temperature for a specific day three weeks away is hindered by the chaotic nature of the atmosphere!
So like I said, before, if the forecast is predicting a sunny weather, take an umbrella!
Then again, have faith on something or someone, and you will be fine!
Like a faith over Bhagwan Mahaveer
Wishing a very happy and blessed Mahaveer Jayanthi
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