Severe Thunderstorm Warning
In short
A severe thunderstorm warning is an urgent alert issued when a dangerous storm is actually happening or about to hit a specific area. It means the storm has been spotted on radar or by people on the ground.
In plain words
This is a high-level alert telling you to take cover immediately. It is different from a watch, which just means a storm might happen. A warning means the danger is right now.
A simple example
If a weather station sees a massive storm moving towards your town on radar, they issue a warning. You should move indoors and stay away from windows straight away.
Why it matters
These storms can cause serious harm through large hail, very strong winds, or sudden flooding. Following the warning helps people stay safe from property damage and injury.
Easy to mix up
Do not confuse a warning with a watch; a watch means be prepared, but a warning means take action.