Thousands of particles let loose on the planet's surface winds, each one riding the flow at its sampled speed. The trade winds, the roaring forties, and whatever storm is spinning today all draw themselves.
light airsteady breezegale and upyou are here
The field is a coarse grid, one sample roughly every 1,500 km, smoothed between points: honest about the big rivers of air, blind to your local gusts. Fetch the wind right now pulls a fresh grid from Open-Meteo while you watch.