Home
Weather London
WeatherRadar
RainfallRadar
TemperatureRadar
WindRadar
LightningRadar
Weather News
Editor's Pick
Discover the app
Weather widget
Contact us
Apps
Career
    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
The solar eclipse arrives tonight. Great visibility for most. . . Wednesday, 12 August 2026
Split image showing an annular solar eclipse on the left and a UK and Ireland weather map on the right with mostly sunny skies, temperatures of 30–31°C in England and 27°C in Dublin.
Wednesday, 12 August 2026

Great visibility for most

The solar eclipse arrives tonight
Getting through the latest heatwave. Tips to beat the heat. . . Tuesday, 11 August 2026
Split graphic showing temperatures up to 35°C in England and 28°C in Ireland beside a person applying sunscreen, with a heat warning symbol highlighting hot weather.
Tuesday, 11 August 2026

Tips to beat the heat

Getting through the latest heatwave
The Perseids reach their peak. Shooting stars overhead. . . Tuesday, 11 August 2026
Shooting stars in the night sky
Tuesday, 11 August 2026

Shooting stars overhead

The Perseids reach their peak
All weather news
This might also interest you
Flooding, gales, and heavy snow. Storm Chandra. . . Tuesday, 27 January 2026
Split image showing aerial flooding in a town with muddy water covering roads on the left, and a rural road on the right blocked by heavy snowfall with vans stopped and a person walking in snow.
Tuesday, 27 January 2026

Storm Chandra

Flooding, gales, and heavy snow
Historic Storm Éowyn arrives. On this day.... . . Saturday, 24 January 2026
Split image showing a person in a yellow jacket struggling against strong winds and heavy rain on a street at night on the left, and an Irish wind forecast map on the right with red and purple shading, gusts up to 75 mph, and a wind warning icon, divided by a curved white line.
Saturday, 24 January 2026

On this day...

Historic Storm Éowyn arrives
New records for England and Wales. Broken again tomorrow?. . . Thursday, 25 June 2026
Temperature map of southwest Britain on 25.06 showing extreme heat across southern Wales and southwest England, with Bute Park in Cardiff highlighted at 34.2°C and Yeovilton at 36.4°C amid widespread deep red heat zones.
Thursday, 25 June 2026

Broken again tomorrow?

New records for England and Wales
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