Home / Weather News /

Eye on the sky - A sky lover's guide to thunderstorms

17:00
19 May 2022

Eye on the sky
A sky lover’s guide to thunderstorms

WeatherRadar for Friday 20th MayWeatherRadar for Friday 20th May. Click to explore more!

With a threat of some thunderstorms in the forecast, particularly in Ireland, we thought we would take this opportunity to create a visual guide of what you might spot in the sky tomorrow.

Cumulonimbus

Cumulonimbus storm clouds erupt from smaller, fair-weather cumulus clouds, and even alone can produce some pretty spectacular structures.

Another type of cloud associated with thunderstorms, though more rare, are mammatus clouds. These are a child of cumulonimbus clouds and though seemingly ominous, could be indicative of both past or impending severe weather.

Keep your eyes peeled for an explainer piece on mammatus clouds tomorrow.

Lightning

Whilst you won’t want to be in close proximity to lightning, given their dangerous nature, watching the sky light up safely from afar is a treat not to be missed.

Lightning is naturally more visible at night, but storms that develop at night tend to become ‘elevated’, meaning they form higher up in the atmosphere, where it is warmer than at the surface.

These elevated storms tend to be more intense as they create stronger downdrafts further from the surface.

As consequence, these storms tend to produce a greater number of cloud to ground lightning strikes, though tomorrow’s look to be more of a daytime feature.

Rainbows

But it’s not just menacing features to keep an eye out for during a thunderstorm; with the harshness of nature also comes raw beauty.

Rainbows often follow a spell of sunshine and showers, and form when sunlight is scattered through water droplets.

This light is then reflected and refracted, creating a rainbow as the light exits the droplets.

It’s not just sunshine that needs to be present, plenty of other conditions need to align, including the angle of the sun in the sky, the position of the sun in relation to the viewer, and of course the presence of water droplets.

So, keep your eyes on the sky tomorrow, especially if you're in Ireland! And don't forget to share your shots with us here.

Weather & Radar editorial team
More on the topic
Colour-coded wind map of the UK and nearby Europe showing widespread orange-red zones with wind speeds labelled 30–40 mph and a wind warning icon in the northwest.
Wednesday 26 November 2025

Gales on the way

Stormy outlook for Thursday
A split image showing a close-up of a full moon on the left, and on the right a UK and Ireland weather map with blue and white patches indicating widespread rain or cloud. Several moon and cloud icons appear over different regions, with temperatures marked mostly between 4°C and 8°C.
Thursday 4 December 2025

Cold Moon rises tonight

Third and final supermoon of the year
The image shows the ruins of a house on the left and the weather radar with thunderstorms over Sumatra on the right.
Wednesday 3 December 2025

Heavy monsoon rain

Flood disaster on Sumatra
All weather news
This might also interest you
plit image showing a double rainbow over a rocky shoreline on the left and sheep grazing in a green field under stormy clouds on the right.
Sunday 2 November 2025

Your weather - Your shots

Mixed conditions on an unsettled week
Sunday 24 August 2025

Your weather - Your shots

Mammatus clouds widely spotted
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

facebooktwitteryouTubelinkList