There isn't enough info in the article to know exactly what is happening, but the problem with most of these systems (my first attempt 10 years ago, or Dark Sky

There isn't enough info in the article to know exactly what is happening, but the problem with most of these systems (my first attempt 10 years ago, or Dark Sky, others as well) is that they use existing rainfall and wind speed to make guesses about where the rain will move. They typically fail at making real weather predictions; new rain starting to fall is a simple example that is often missed by these kinds of predictions. The article just says "maps" but doesn't say what the data is. Rainfall amount? Just rainfall or also wind maps? What other maps? Curious to see how this works in reality. Most of these attempts can be impressive sometimes, but fail often enough to make it not reliable for real use. However I am extremely optimistic about the future of increasing weather prediction accuracy, including with AI models as well as traditional physics models. We'll see I guess.