The Heavens · Weather engine · iPhone iPad Watch Mac TV Vision

The sky, measured against your body.

A weather engine for every Apple platform — radar physics, barometric pressure, and solar geometry, read against your head, your skin, and your day.

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Elevation tilt 0.5° · beam over Nationals Park

KLWX STERLING · 06/30/2012 02:56Z · DUAL-POL REFLECTIVITY

01 · Tilt viewer

Volumetric radar, tilt by tilt.

The Heavens builds live 3D storm volumes from the national radar mosaic — cores, hail, storm-top height. Here is what one station sees: a real KLWX volume, tilt by tilt, low over the ballpark at 0.5° and through the storm top by the upper cuts.

Scrub the 72-hour record 72-hour pressure trace

KDCA REAGAN NATIONAL · ASOS · 27–30 OCT 2012 · HURRICANE SANDY

02 · Barometer

Migraine defense.

The trigger is the fall, not the level. Scrub a real 72-hour trace from Reagan National and watch the risk band light as the front passes.

03 · Solar

UV, by skin type.

Your burn window is geometry — the sun's altitude and your Fitzpatrick type. The sun on this page is the sun on your wrist; pick your type and read the countdown.

Also aboard

A tornado warning on iPhone — Critical Alerts that override Silent mode.

Your day: the forecast mapped to your calendar — Your day, hour by hour, with the dry windows.

Ask Air: a plain-English weather question — Ask Air — a question in plain English, answered from the data.

Shade and UV timing — Shade, UV, and the burn window by skin type.

A warning on Apple Watch — Warnings and the barometer on your wrist.

How it's built

Radar: Live Doppler radar; 3D storm volumes from the national MRMS mosaic; scan-by-scan replays back to 2008
Alerts: Tornado, flash flood, tsunami, snow squall and extreme wind via iOS Critical Alerts — free forever
Screens: iPhone, iPad, Apple Watch, Mac, Apple TV, Apple Vision Pro — one subscription
Native: Swift, SwiftUI, Metal, HealthKit (read-only)
Voice: Google Gemini, for the spoken briefing and Ask Air
Tiers: Daily Essentials free; Weather Engine Pro; Pro Ultra with 10-location monitoring, flight tracking and 3D radar
Privacy: Zero ad tracking. Your location and routines are never tracked, profiled, or sold.

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