How to use the online alarm clock
As you hand the river-level check to the next person, an alarm for 9:47 pm gives them a clear moment to take over after the evening downpour. It leaves enough time to confirm which gauge or viewing point they should use and how they will report back before 10:00 pm, without turning the change of shift into a rushed exchange.
For this handover, the signal needs to be audible where the other person will actually wait. A television, extractor fan, radio or conversation can easily cover a quiet browser alarm, so the volume should be tested against the room’s background noise rather than judged in silence. If nobody keeps this alarm active and awake until 9:47 pm, the river check will receive no signal; a separate phone alarm is therefore sensible when responsibility passes to someone who may leave the computer.
A late-evening handover can still happen in a warm room after a muggy day, particularly when windows have stayed shut during heavy rain. Strong air conditioning may mask the alarm and make the room feel cooler than conditions outside suggest. Keeping the person on duty near the signal, with any fan setting reduced for those few minutes, helps them hear it and remember that the outdoor river-level check may require different clothing from the indoor shift.
Common questions
Does the alarm still work if I close the tab?
No. Everything runs inside this page, so closing the tab — or quitting the browser altogether — ends the countdown there and then. Leaving it open in the background is all it asks, and switching to another tab makes no difference.
What happens if my laptop goes to sleep before 9:47 pm?
The tab sleeps along with it and the alarm will not sound on time, if at all. If you are relying on it, change the power settings so the machine stays awake, or keep a phone alarm running as well.
Do I need an account or an app?
Neither. Choose a time and a sound, press Start, and it runs in this browser tab. Nothing is downloaded, nothing is registered, and closing the page leaves nothing behind on the device.
Can I change the sound?
Yes, there is a short list of tones to pick from before you press Start. Softer sounds are easy to sleep through, so a firmer bell tends to be the safer choice for anything early in the morning.
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