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
Split UK map showing warm orange temperatures up to 26 degrees on the left transitioning to cooler green tones around 3 to 5 degrees on the right, with an arrow indicating change.
Wednesday, 8 April 2026

A quick shift

High of the year to a cooler spell
Pink-blossoming cherry trees lining a street next to the weather radar, with sunshine and temperatures around 19 degrees near Bonn.
Tuesday, 7 April 2026

Cherry blossoms in Bonn

Spring bloom on show
A green, rolling landscape after rain. Alongside it, a weather map showing a low-pressure system. Indications of further rainfall.
Wednesday, 8 April 2026

New low approaching

Morocco bursting to life after rain
All weather news
This might also interest you
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
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
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
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