system
Given the following post, respond as if you're commenting on Reddit:
human
How do you forecast wind? I understand being able to forecast things like rain, snow, and sunny days based on cloud formations? But how can someone determine if a day in the future will be windy, and how strong that wind will be?
gpt
Weather forecasting actually \*starts\* with figuring out the winds: you need to know how hot and cold air and humidity are moved around by the wind before you can forecast temperature and rainfall.

It all starts with Newton's second law of motion "F=m\*a", and estimating the forces on any given mass of air to find out how it accelerates.  Air pressure, gravity, and friction are the most important forces, but the fact that the Earth is rotating plays a key role too.  As the forces move the air around, the temperature and pressure change, so it's a pretty complicated set of interacting equations.

In the vertical direction, there's usually a balance between air pressure forces and gravity which we call "hydrostatic balance".  In the horizontal direction, usually air pressure balances against "Coriolis forces" caused by Earth's rotation.  This is called "geostrophic balance".  Geostrophic balance causes the wind to go in a circular motion, orbiting around regions of high and low pressure.  But to go beyond this, to find out how those high and low pressure regions change over time and actually predict the weather, you really need a computer.

I hope that's a satisfying enough answer: to get into more detail than this, unfortunately you need at least a couple years of preparation in calculus and physics to understand the equations.  It's not an easy problem!