[nickmcc]

I think you could also infer storm tracks based on pilot deviations they often make following their on-board radar.

[touisteur]

If you're lucky to be in an area where a Mode S radar is requesting BDS4,4 you can gather more (sparse) live meteorological data: wind speed/direction, temperature, air pressure, humidity... haven't seen BDS 4,4 requested in a while but maybe someone will enable it in your area...