Hail Alert app icon Hail Alert

Move the car
before the hail
arrives.

Hail Alert watches the storms near you and sends a notification the moment a hail threat comes within range — with the expected stone size, how far away it is, and where it's heading.

Android 1.0.0 is the current release. Hail threats are checked within 50 km of your location.

6:46
Hail Alert
All clear
No hail threat detected nearby
Checked 6:46 PM, 6 Aug
Last Hail
View history
2 Jun 2026 7 mm · Minor
Today
History
Severity Scale
Tap a state to see what the app shows

Everything you need to get the car under cover in time.

Notifications that reach you

A push notification the moment a hail threat is detected nearby, with expected stone size, distance and the window it's likely to hit.

The threat on a map

See the threat area against your own location, its forecast path, and which direction it's tracking and how fast.

Home screen widgets

Current status sits on your home screen, so a glance tells you whether you're clear without opening anything.

Your own thresholds

Set a minimum hail size and a minimum confidence, and pick a 1, 6 or 24 hour alert window. Anything below your bar stays quiet.

How it works

Three steps, then the app does the watching.

Severity bands

Drag the slider to see how big the stones get. Bands follow Bureau of Meteorology severe thunderstorm criteria.

18 mm
Moderate
About the size of a marble or a 5 cent coin
4 mm 70 mm
01

Install and allow location

Your location sets the 50 km circle the app watches. Threats outside that circle won't notify you, even if they're severe.

02

Set your thresholds

Choose the smallest hail size worth waking you, the confidence level you trust, and how far ahead you want warning. Send a test notification to see how it looks.

03

Get on with your day

Hail Alert keeps checking in the background. When something crosses your thresholds, your phone tells you — and the widget shows the status the rest of the time.

Inside the app

Data and accuracy

Where the numbers come from

Hail Alert retrieves its hail data from the Vaisala Xweather API and presents it in the app. Severity bands follow Bureau of Meteorology severe thunderstorm criteria.

— Every size reading carries a confidence figure, shown alongside it. Low confidence readings are labelled as such rather than hidden.
— Predictions are estimates. Hail is a small-scale phenomenon and a storm can shift after an alert is sent.
— Hail Alert is not a substitute for official Bureau of Meteorology warnings or emergency service advice.

FAQ

Not yet. Android 1.0.0 is the current release; an iOS version is in development.

Threats are checked within 50 km of your location. Anything further away won't trigger a notification, even if it's severe.

Only if you want it to. A threat has to clear both your minimum hail size and your minimum confidence before a notification is sent.

Warning time depends on the storm — it's based on live radar detection, not a long-range forecast, so it can range from under an hour down to just minutes for fast-forming cells. Every alert shows the specific predicted time window for that storm, and we check for new threats every hour so you're notified as soon as one is detected, with no extra delay added on our end.

Yes. Send a test notification at any time, or preview a sample threat near your location to see exactly how a real one will look.

Your location is used to work out which hail threats are near you and nothing else.

Hail is quick.
Be quicker.

Install Hail Alert and you'll know while there's still time to move the car.

Get it on Android Google Play · v1.0.0
iPhone In development