Live magnetosphere feed
DSCOVR solar-wind data refreshes every 60 seconds, so your KP estimate is never a minute stale.
auto_awesomeReal-time aurora intelligence
Forecast the aurora before it ignites.
Nimbus fuses live solar-wind telemetry with hyperlocal cloud models to tell you, hour by hour, whether the northern lights will show over your horizon.
ac_unitCapabilities
Built for the polar night
Three instruments, one mission: never miss a clear-sky storm again.
3 km hyperlocal resolution
Cloud and geomagnetic models downscaled to your valley, fjord or rooftop — not your whole region.
Frost-proof alerts
One quiet ping 45 minutes before peak — and only when your patch of sky is actually clear.
routeProcess
From solar wind to your window
01
Pin your sky
Drop a pin or use GPS; Nimbus calibrates to your magnetic latitude and light pollution.
02
Watch data converge
Bz angle, solar-wind speed and cloud ceilings collapse into one simple visibility score.
03
Get the ping
When everything aligns, one notification sends you outside — tripod and all.
starField reports
Trusted under the auroral oval
"Nimbus told me to drive twenty minutes east at 22:40. The corona over the fjord was the best I've caught in three winters."
Aila Virtanen
Astrophotographer · Tromsø, Norway
"The clear-sky filter is the killer feature. Every other app cried wolf all season — Nimbus never once did."
Erik Sandström
Aurora tour guide · Abisko, Sweden
workspace_premiumPricing
Simple plans, polar proven
Per month, billed monthly.
Explorer
For casual skywatchers
$0/mo
- check_circleHourly KP forecast
- check_circle3 saved locations
- check_circleAurora field guide
Voyager
For serious aurora hunters
$9/mo
- check_circle45-minute push alerts
- check_circleHyperlocal 3 km cloud model
- check_circle10-year storm archive
Observatory
For tours & research teams
$29/mo
- check_circleREST API & webhooks
- check_circle20 team seats
- check_circleCustom sensor feeds
helpFAQ
Questions from the ice
How accurate are the forecasts?
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During active geomagnetic periods Nimbus predicts visible aurora with roughly 88% precision on a 3-hour horizon. In quiet-sun weeks confidence drops — and we show that confidence on every forecast card.
Does it work below the Arctic Circle?
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Yes. During strong storms (Kp 5+) the auroral oval pushes south, and Nimbus will alert you whenever your latitude has a realistic chance — even at 50°N.
Is there a free tier?
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Explorer is free forever: hourly forecasts and three saved locations. Push alerts and the hyperlocal cloud model live in Voyager.
mailEarly access
Be first outside when the sky turns.
Join the Voyager waitlist — Nimbus launches across the Nordics in winter 2026.