What causes thunder and lightning? - Met Office

Thunderstorms develop when the atmosphere is unstable. This is when warm air exists underneath much colder air.

Stay safe in thunder and lightning - Met Office

> Wilmington, OH > Lightning Safety Awareness Week

Rare Lightning: Sprites, Blue Jets and Elves

Summer storms can strike suddenly. Here's what causes them.

Lightning Safety Tips, Lightning

Weather Safety - Storms, Hail and Lightning

What is lightning?

Africa, a Thunder and Lightning Hot Spot, May See Even More Storms

WeatherQuestions.com: What causes thunder?

Lightning: Different types, how to stay safe