In an ideal world, MotoGP teams can use practice to prepare for the race on Sunday. Test tires in FP1, make setup changes in FP2, finalize the setting in FP3 and FP4, then into qualifying to be ready for the race. In an ideal world, conditions are comparable enough through all practice sessions on Friday and Saturday to find the optimal setup choices for Sunday.
But we don't live in an ideal world, of course. Temperature differences and changing conditions leave a lot to a mixture of experience and guesswork. Even then, as long as you have dry weather, you can get pretty close.
That is not the case this weekend in Spielberg, however. FP1 saw excellent conditions: warm, dry sunny. Not too hot, and temperatures not far off optimum for the tires. But rain started in the afternoon, and FP2 was wet, with a drying line as the session went on. Data collected in the morning would be useful for a dry race. Data in the afternoon is contingent on the amount of rain that falls in the case of a wet race, which looks a racing certainty.
Ready for anything?
A wet race would render the data collected on Saturday pretty much irrelevant as well. Saturday in Spielberg looks set very fair, bright, sunny and warm. But the forecast for Sunday is the worst of all worlds: thunderstorms, with a chance of heavy rain.