Home / Editor's Pick /

Check our LightningRadar: How do thunderstorms develop?

11:00
29 March 2023

Check our LightningRadar
How do thunderstorms develop?

Lightning

Across Ireland, thunderstorms are likely to develop during the day. But how do thunderstorms actually develop?

They begin to form when warm air lies under colder air in an unstable atmosphere. The warm air will then rise quickly and condense into water droplets to form a cumulonimbus cloud.

Within the cloud, the warm air and water droplets continue to rise and will eventually freeze into positively charged ice crystals. When the ice crystals are heavy enough, they begin to fall as hail.

As the hail falls, it becomes negatively charged. The negatively charged pieces of hail at the base of the cloud then become attracted to the positively charged Earth's surface.

When the attraction is strong enough, the charges come together creating a flash of lightning. It is the rapid expansion and heating of the air which causes the claps of thunder.

You can keep tabs on our live LightningRadar where strikes are indicated by an expanding ring. The yellow dots, which will then be visible for 15 minutes and decrease in strength to indicate time passed since they first struck.

Watch our weather explained video below to find out more about how thunderstorms develop:

Weather & Radar editorial team
More on the topic
Shooting stars, part of the Geminid meteor shower.
Saturday, 13 December 2025

Spot a shooting star

King of meteor showers at its peak
Split image showing a towering storm cloud with rain shafts over the sea on the left and a vivid red aurora illuminating the night sky above residential rooftops on the right, divided by a curved white line.
Tuesday, 9 December 2025

Your weather - Your shots

Autumn captured by you
Radar map showing widespread blue rain bands over the UK and Ireland with a triangular heavy-rain warning icon placed over central Britain.
Tuesday, 16 December 2025

Thursday rain

Incoming downpour prompts warnings
All weather news
This might also interest you
Mammatus clouds
Thursday, 21 August 2025

Unusual view

Mammatus clouds over Ireland
Weather graphic showing rain and wind fields over the Canary Islands and a central warning symbol.
Friday, 12 December 2025

Storm and rain

Turbulent weather in the Canary Islands
Weather map of the UK and Ireland showing scattered showers with cloudy patches across much of the region, especially around western and northern areas. Sunshine symbols appear over London, Cardiff, and parts of southern England, while temperatures range from 17°C to 18°C in most places. Areas of heavier rain are visible over the Atlantic to the west.
Friday, 29 August 2025

Breakfast brief

Unsettled conditions into the weekend
All articles
Weather & Radar

Weather & Radar is also available on

Google Play StoreApp Store

Company

Contact us Privacy Policy Legal info Accessibility statement

Services

Uploader

Socials

facebooktwittertikToklinkList