Synonyms of a bolt from the blue/a bolt out of the blue in English:

a bolt from the blue/a bolt out of the blue


See definition of a bolt from (or out of) the blue

phrase

1‘it was a bolt out of the blue when Alan resigned’

SYNONYMS
shock, surprise, bombshell, jolt, thunderbolt, revelation, source of amazement
informal turn-up for the books, shocker, whammy