I am delighted with USGrib, and have recommended to many of my sailing friends.

The wind direction display in the Meteogram can be hard to decipher when the direction varies about North. When the direction shifts from, say, 358 to 002 it looks like there has been a huge change in direction. The situation is made more confusing because the winds speed graph should be interpreted as a major change if the graph line drops or rises over the full scale.

One solution might be to show the change in direction, rather than the absolute direction. The left-most point of the direction graph could be accompanied by its absolute direction.


Best wishes