Synonyms for Thundery (same or very similar meaning)
WordNet sense 1 (loud enough to cause (temporary) hearing loss):
deafening, earsplitting, roaring, thunderousWordNet sense 2 (characterized by or producing sound of great volume or intensity):
loudWordNet sense 3 ((especially of weather) affected or characterized by storms or commotion):
stormyFrom the ODE community, based on WordNetadd/edit