It is great, and one of the other main weather apps that I use. But it lacks alerts. Dark Sky gives these (literally "Light Rain Starting in 20 Minutes" or "Heavy Rain Starting in 5 Minutes".

Dark Sky also does a fair job of showing general forecast and chances of things over the next week or so.

While I use Windy as an app for me to check and see what's going on, it's not nearly there on the prediction front. Much less notifications that help with "Woah -- heavy rain, time to head back to the car" or "Just a drizzle, cool, let's keep going".

The killer feature is that they provide data from the best global model (ECMWF) for free.

Thanks for the suggestion, at first glance things look pretty nice. Hopefully their mobile app is as nice as their website.