xkcd #3267: Types of Tornado Alert
Title text:
I hate the unearthly sound my phone makes when the weather service issues a tornado harbinger.
Transcript:
Transcript will show once it’s been added to explainxkcd.com
Source: https://xkcd.com/3267/
There’s also an anti-warning. According to this sales pitch, I should book this vacation if I want to see tornados.