Plain-language answer: Solar wind is the continuous flow of charged particles and magnetic field from the Sun past Earth.
Why operators care
Speed, density, and magnetic-field orientation influence how strongly it couples to Earth’s magnetosphere and whether geomagnetic disturbance develops.
What to compare on air
Read speed together with density and IMF Bz, then compare Kp and actual path behavior; one number is insufficient.
The common mistake
Assuming fast solar wind always creates a severe geomagnetic storm.
Forecast boundary
Space-weather indices and propagation models describe probabilities and regional conditions. A usable contact still depends on the exact path, time, frequency, antenna pattern, noise, power, and current observations.
