VortiCast

Most weather apps hand you one number and hope you don't ask where it came from. VortiCast shows you the forecast, the sources behind it, and exactly how much to trust it — built for people who actually watch the sky.

THE BEST SOURCES, NOT A BLACK BOX Days 1–7 come straight from the National Weather Service — the same official guidance meteorologists build on, with no proprietary "secret sauce" muddying it. For days 8–14, VortiCast taps the ECMWF ensemble (EPS) and GEFS: dozens of model runs that map the full range of what's possible, not a single confident-sounding guess.

A RADAR FORECAST THAT KEEPS PLAYING Hit play and the radar doesn't stop at now — it runs 18 hours into the future, frame by frame. Under the hood, our backend blends live MRMS radar into NOAA's HRRR high-resolution model and advects it forward, so you're not watching a cartoon loop — you're watching physically grounded guidance for where the storms actually go. Smooth on the front end, serious science on the back end.

KNOW WHEN THE FORECAST MIGHT BE WRONG This is the part other apps skip. Forecast Confidence reads the spread across the ensemble and tells you, day by day, how settled the outlook really is — and whether it's the temperature or the precipitation that's shaky. Compare Models puts NWS, GFS, and ECMWF side by side so you can see for yourself where they agree and where they diverge. When the models split, you'll know before the forecast does.

PRO-GRADE TOOLS, APPROACHABLE DESIGN • Multi-band GOES satellite — infrared, water vapor, visible, shortwave • GOES GLM lightning — flash extent density, not just individual strikes • Surface observations — live temp, dewpoint, wind, and pressure from thousands of stations • SPC convective outlooks for severe-weather days • Live watches, warnings & advisories • Wind, precipitation, and temperature forecast maps • Detailed hourly graphs for temperature, wind, sky, and precip • Air quality (AQI) and real sunrise/sunset

Weather data is U.S.-focused through the National Weather Service; locations worldwide are supported through Open-Meteo.

VORTICAST PRO Unlock the Radar Forecast, Forecast Confidence, Compare Models, extended hourly graphs (days 4–7), advanced satellite bands, GLM lightning, surface observations, SPC outlooks, and wind forecast maps. • $5.99/month or $39.99/year • 7-day free trial — full access, cancel anytime Subscriptions auto-renew unless turned off at least 24 hours before the period ends. Payment is charged to your Apple Account. Manage or cancel in your App Store account settings. Privacy policy: https://vorticast.com/privacy/

VORTICAST PRO SUBSCRIPTION Monthly — $5.99/month Annual — $39.99/year (save 44%) 7-day free trial for new subscribers.

Payment is charged to your Apple ID at confirmation of purchase. Subscription automatically renews unless cancelled at least 24 hours before the end of the current period. Manage or cancel anytime in Settings → Apple ID → Subscriptions.

Privacy Policy: https://vorticast.com/privacy/ Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/