Causes affect the airlines. Because there are thunderstorms in the worst weather conditions with wind gusts of air flow with severe blowing up. -Severe, making the aircraft flying through or fly into nearby receiving progesterone feel turbulence knocked.
Thus affecting the flight because of the storm, with the worst weather conditions with wind gusts are violent air currents blowing up - do violence to aircraft flying through. Or fly nearby the turbulent, deeply felt impact.