Live alerts, not yesterday's news
Hooked directly into NWS, ECCC, SPC, USGS, EPA AirNow, and IEM — you see what official forecasters see, the moment they publish it.
See the stormbefore it finds you.
Tiah is a free iOS app that fuses live weather, severe-weather alerts, earthquake and wildfire reports, and a 0–7 hour tornado-prediction engine — for the US and Canada.
Free · No ads · No tracking · iPhone (iOS 17+)
Tiah is informational only. In an emergency, call 911.
Built for the moments that matter.
TTRF: 0–7 hour tornado forecast
Our proprietary fusion of SPC outlooks, live CAPE/shear, climatology, and nearby products — rendered as a calm, explainable risk halo on the map. Not a warning, but an early heads-up.
Built for the people outside
Farmer & outdoor-worker mode adds frost, spray windows, GDD, and a work-safety index. Your phone works harder so you don't have to.
How Tiah works
Grant location
We localize every alert on your device.
Open Shield
A single safety score and the live AI summary.
Scan Alerts
Filter by severity, time, and threat type.
Map
Live tornado, air-quality, fire, and seismic layers.
Calm. Honest. On your home screen.
Three views you'll actually use: a single safety score, a focused alert feed, and a live map of every threat near you.
Built on trusted public data
- NOAA
- NWS
- SPC
- ECCC
- USGS
- EPA AirNow
- Apple Weather
- Open-Meteo
Weather data provided by Apple Weather
Free, forever, on your iPhone.
No subscription required. No ads. No tracking.