Not talking about penetrating one in flight, more like the effect of getting struck by one while parked on the ground... Last night a major storm rolled through STL. Since there was lightning in the area, the ramp crews shut down and several arriving Southwest 737s got backed up on the ramp. Then the storm's intensity increased and a tornado warning was issued. It got me thinking, what happens if a tornado hits a parked, loaded 737? Or is this a scenario that nobody knows the outcome, and all airlines pretty much just take their chances and hope for the best?