Definition of weather bomb in English:

weather bomb

noun

Meteorology
  • A rapidly developing severe storm, technically defined as one in which barometric pressure at the centre of the storm drops by at least 24 millibars over a 24-hour period at or north of 60° latitude.

    ‘brace yourselves for the Boxing Day weather bomb!’
    • ‘About three metres of his yard disappeared during the 2010 weather bomb.’
    • ‘A Nasa astronaut has captured the moment the powerful weather bomb storm swept over the UK, posting the image on Twitter.’
    • ‘A fully fledged weather bomb is raging outside which has made our semi-sheltered spot extra popular.’
    • ‘Video shows the moment when lightning struck a wind turbine during the so-called weather bomb on Wednesday.’
    • ‘The alert comes after satellites revealed the weather bomb - a deep low pressure system - developing near Iceland.’

Origin

1940s: popular term for an instance of explosive cyclogenesis.