Weather centers only release their forecasts every six hours.

气象中心每六小时才发布一次预报。

Which is why the big weather centers don't just generate one forecast.

这就是为什么大型气象中心不会只发布一个预报。

These balloons carry instruments called radiosondes, which measure initial conditions and transmit their findings to international weather centers.

这些气球带着称作无线电探空仪的仪器，会观测初始条件，然后把结果传输到各个国际气象中心。

These AI models still rely on the same observation data from the big weather centers, the data that creates that initial 3D grid snapshot.

这些 AI 模型仍然依赖于来自大型气象中心的相同观测数据，这些数据创建了初始 3D 网格快照。