YOUR phone will ping with an urgent message today.
The alert is part of the second test of the national emergency alert system.
Devices connected to 4G and 5G networks will receive the message at 3pm tomorrow.
The loud siren will last for up to ten seconds as part of a nationwide test.
Mobile phones are also expected to vibrate, while users will also be sent a message to make clear that the alert is just a drill.
It will assure the public that they “do not need to take any action” and include text both in English and Welsh.
But as drivers should already know, using a hand-held device while driving is illegal and can result in a £200 fine and six penalty points – even if the alert occurs while they are behind the wheel.
The text will be sent out in a matter of hours[/caption]