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⛈️ It's been a relatively quiet start to spring for thunderstorms, but things pick up this weekend ⛈️ ⛈️ Saturday will see the chance of afternoon thunderstorms for the inland South Island, which then spread north on Sunday to affect the east coast from Gisborne down to Wairarapa and Marlborough.

8/10/26, 11:41 pm2 reposts5 likes

MetService NZ

@metservice.com

🌞 The increasing power of the sun means spring is our most active season for afternoon thunderstorms. The stronger sun warms the land and causes air to rise. Under the right conditions that air accelerates high up, driving the formation of storm clouds called Cumulonimbus clouds or "CBs".

MetService NZ

@metservice.com

⚡ These CBs have chaotic air currents that allow bits of ice to smash into each other, causing static electricity to build up inside the storm until it gets unleashed in a bolt of lightning. 🤔 Want to learn more about these clouds? Check out our explainer here about.metservice.com/learning/cum...

about.metservice.comCumulonimbus — About MetServiceCumulonimbus clouds are our cloud giants on earth. They are the tallest and most hazardous in the cloud family. They are towering, dense columns of moisture, that are often associa...