Word Origin & History
tempest"violent storm," mid-13c., from O.Fr. tempeste (11c.), from V.L. *tempesta, from L. tempestas (gen. tempestatis) "storm, weather, season," also "commotion, disturbance," related to tempus "time, season." Sense evolution is from "period of time" to "period of weather," to "bad weather" to "storm." Words
for "weather" were originally words for "time" in languages from Russia to Brittany. Figurative sense of "violent commotion" is recorded from early 14c.