Depending on the distance from and nature of the lightning, it can range from a sharp, loud crack to a long, low rumble (brontide). That’s over a billion kilometers an hour, so we see effectively lightning flash as it happens. The thunder sound is an enormous expanse of air, which is heated approximately to 30,000 ° C (more than the surface temperature of the sun) directly around a lightning bolt, generating an audible shock wave. Thunder is the sound caused by lightning. Click for larger animated image. Thunder reversal sound is often stronger, and can be heard and felt at much greater distances than ordinary thunder. Thunder is the sound caused by lightning. These discharges result in sudden flashes of light and trembling sound waves, commonly known as thunder and lightning. Even in some cases, the aggregated / amplified thunder was a mock quake. Lightning and thunder happen most frequently during the summer, as the core ingredients for a storm are moisture and warmth. Your email address will not be published. Image: In reflection of thunder, the sound traps under a layer of warmer air, bringing it closer to the surface for a longer period, meaning that it may appear stronger and travel more distances. While Britons baked in the heat yesterday as the mercury soared to 38C in parts, the stifling sunshine is now coming to an end. What causes lightning and thunder? This is because light is much faster than sound. The primary cause of thunder is the lightning itself after it has coursed through the air. This temperature pattern works like the cap at a certain distance (usually less than 1 km) above the surface. It’s a stormy and dark night, and you see an amazing flash of light in the sky – it’s lightning. BBC Weather: UK braces for more thunderstorms as temperatures plummet, Lighting tracker LIVE: Rain radar map as thunderstorms sweep UK. Thunder and lightning are linked to one another - you can’t have either of them alone. The primary cause of thunder is the lightning itself after it has coursed through the air. But under ideal conditions, such as a quiet night, it can sometimes be heard up to 25 km away. Please consider supporting us by disabling your ad blocker. What causes lightning: When a positive and negative charge grows large enough in the sky you get lightning. What causes thunder and lightning? This is when warm air exists underneath much colder air. While the UK reached record high temperatures yesterday, the brutal heat has shifted into storms. Thunder and lightning A thunderstorm is a series of sudden electrical discharges resulting from atmospheric conditions. Have you ever got a static electricity shock? Thunder and lightning are associated with convective clouds and are often accompanied by heavy rain or hail. I guess … it’s thunder! The deep rumbling and sharp cracks of thunder are produced as the air around the lightning bolt is superheated — up to about 54,000° Fahrenheit (about 33,000° Celsius) — and rapidly expands. For example, if you see lightning flashing and counting for 6 seconds before hearing thunder, then the lightning has occurred within 2 km. How does lightning form? Here's what causes thunder and lightning and why storms often follow hot weather. Required fields are marked *. Thunder is caused by lightning, which is essentially a stream of electrons flowing between or within clouds, or between a cloud and the ground.