I was commenting on the "short lasting" part (and the nuances between neverin vs nevera, first one being for "short lasting" storms/thunderstorms, the latter being more generic).
>The root of the word seems to be disbelief ne + vjera
The word is completely unrelated to disbelief, it's of Venetian origin (< nevèra, meaning snow blizzard).
That would be neverin.
Nevera is a storm/thunderstorm in the Adriatic in general, not necessarily a short lasting one.