Weather & Radar
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
Wednesday 30 April 2025

26.5°C in Surrey

New UK temperature date record
Monday 12 May 2025

Across England and Wales

Thunderstorm risk to start the week
Wednesday 14 May 2025

Mostly clear this week

Understanding clouds on the WeatherRadar
All weather news
This might also interest you
Monday 28 April 2025

Breakfast brief

Hot spell begins, widely 20°C+
Tuesday 29 April 2025

Breakfast brief

Sunny as temperatures continue to rise
Wednesday 14 May 2025

Breakfast brief

Dry, mostly sunny, slightly cooler
All articles
Weather & Radar

www.weatherandradar.ie

facebooktwitteryouTubeContact uslinkList
Privacy Policy | Legal info