The Route Finder tool is a graphing assistant found under the Graph icon at the top of the View screen in SAGA. When selected, a red line immediately bisects your GRIB display (with one end labeled A and the other B) and a graph insert appears.
The X axis of the graph relates to the distance between A and B. The Y axis shows you the intensity of the variable you are studying (e.g. knots of wind or mb of pressure). If you have a multi-variable grib product such as wind, above the graph is shown data like wind direction. Below the graph is displayed the latitude and longitude points associated with points A and B.
Why would I use the Route Finder tool?
Tap and hold on either end of the red line to move that end to a starting or ending spot of interest to you. Watch the graph change as you move the end point. The Route Finder tool is a good way to quickly look at the forecast weather along different routes you can take to your destination.
Watch the route finder video tutorial