The next ninety minutes, near you.
Ninety Sky combines radar and NOAA's models to show when rain is possible nearby. See the chance of rain across the next ninety minutes, with forecasts checked against later radar observations.
Ninety minutes, and how sure we are, in one glance.
Rain likely by 3:40, heaviest around 4.
Height is the chance. Each section shows the chance of rain during that time window: 15 minutes at first, then 30 minutes for the last section.
Colour is projected intensity. Radar motion estimates how hard rain may fall: greens for lighter rain, yellows and oranges for heavier rain, reds for a downpour.
You decide. Use the timing and rain chances to decide whether to bring an umbrella or wait a while.
Four things, every few minutes.
- Look
We watch the radar every two minutes.
The whole country, two kilometres at a time, then we measure which way the rain is moving and slide it forward.
- Ask
We ask the models, and a judge.
NOAA's HRRR sketches the shape of the rain; the National Weather Service fills in the hours. Jev, a decision model, weighs them against the radar.
- Show
We show you the doubt.
The ribbon for the next ninety minutes, then the hours, then three and seven days, each with its chance of rain.
- Check
We grade ourselves.
We compare forecasts with later radar observations and test changes on held-out data. Our research page shows the results and their limits.
A tap on the shoulder before it rains.
When rain is about half an hour out, when it starts, and when it's done. Never more than one of each every half hour, and nothing between ten at night and seven in the morning.
Built to be honest about the weather.
A forecast for your area.
Radar displayed at roughly two-kilometre resolution, with rain chances for an approximately eight-kilometre area. Conditions vary within it.
It shows its doubt.
A 40% chance looks like a 40% chance, not a raincloud icon.
It checks its work.
We log forecasts and check those with enough radar observations to verify. The evaluation is still growing.
It leaves you alone.
No accounts or ads. We use your location to provide forecasts and check their accuracy; see our privacy policy for details.
The short answers.
Is it free?
Yes, while we're in beta. Later, longer-range forecasts and rain alerts may become part of an optional subscription; the ninety-minute forecast is staying free. We'll say clearly what's changing before anything does.
Where does it work?
The contiguous United States, where NOAA's radar mosaic and models reach.
What happens to my location?
The app sends your coordinates to build your forecast, only while it's open. Nothing is sold or shared for advertising. The privacy policy has every detail.
Can I use it for storm warnings?
No. It's for the umbrella, not for safety. For warnings, follow the National Weather Service and your local authorities.
How do I reach you?
Send feedback from the bottom of the app or the website, or email hello@ninetysky.com. We read every note.