isoceraunic

[ ahy-soh-si-raw-nik ]
/ ˌaɪ soʊ sɪˈrɔ nɪk /

adjective Meteorology.

representing, having, or indicating equality in the frequency or intensity of thunderstorms: isoceraunic line; isoceraunic map.
Also isokeraunic.

Origin of isoceraunic

iso- + ceraun- (< Greek keraunós thunderbolt) + -ic