O.k. you are flying on your flight plan, using AI ATC on an IFR flight. Active Sky warns you of a monster storm along your scheduled flight path. You turn your NAV hold off and turn to avoid the storm. ATC starts telling you to return to heading. If you ignore them long enough they will cancel your IFR, which requires either that an IFR flight plan has to be redone or you are stuck making a VFR approach at your destination airport. How does one deal with this scenario in such a way as to not lose the IFR flight plan?