TALON — Total Atmosphere Live Observation & Nowcasting

Colors = rain. Green is light, yellow moderate, red heavy, pink/purple means hail is likely.

Press play to see the last hour of radar, then where it's headed.

The striped part of the timeline is the forecast. Set Next 24 hr to add the HRRR weather model's simulated radar after the first hour.

Tap anywhere for that exact spot: how hard it's raining, what's coming, and any warnings.

Dots with lines are storms and the paths they're heading on. Orange and red ones are severe.

Overview tells you, in plain words, if anything is headed your way. Tap Notify me to get alerts.

Rotation (R). TALON reads the raw super-res wind data from the nearest radars every scan and finds rotation itself: strength (Vrot), depth through 4 tilts, debris (CC drop), trend, path and ETA, plus NOAA's ProbTor. Circles with a ring are tornadic; pink means a debris signature. Open the Rotation tab for details, storm motion and replays of past tornadoes.

Close-up view adds SRV (storm-relative wind), Velocity, Rotation and CC at full 0.25 km detail. Press V to cycle them.

Chasing? Tap the car button (or press C). The map follows your GPS with every street, shows your trail, keeps the screen on, and tells you where you are compared with the storm. Tap a storm, then Track this storm to lock onto it. Pick Streets or Satellite under Layers → Map for road detail.

How to use TALON

The basics

Keyboard shortcuts

Under the hood