What's the definition of the probability of precip you're using? And how are you aggregating it? I ask because definitions can vary a lot and aggregation may not be straightforward.
Another thing to consider is how you interpret/convey wind direction. Usually weather data sources provide the direction the wind is coming from. And people seem split on if the arrow should point to the origin or direction, depending on their background. It's a shame there aren't more characters like ⎋ (with the arrow going the other direction) to better represent origin/direction.