Anvil
A free, pro-grade weather-radar workstation for macOS. It reads the raw NEXRAD Level II feed the way the professionals do — and it tells you when the weather is coming for your own address.
What it does
Nothing to install
Drag Anvil into your Applications folder and open it. Anvil carries its own private Python and the whole radar-science stack inside the app — no setup, no terminal, no dependencies to chase.
Warnings for your address
Set a home base once and Anvil watches the National Weather Service for alerts covering that exact spot — not the region, not wherever the map happens to be pointed.
Gate-accurate Level II
The raw radar volume, rendered gate-for-gate on the GPU — crisp at any zoom, with roughly eighteen products from reflectivity and velocity to dual-pol, hail and rotation.
Today's Recap
One page for the day: the ordinary weather first — temperature, wind, rain — then what was warned, what was confirmed, and what the atmosphere was actually doing.
It keeps watch
A small background helper records severe-weather activity near home around the clock, so the recap is a real record of the day rather than a diary of when you happened to be looking.
The storm in 3D
Lift the volume into three dimensions and orbit it — isosurfaces, a vertical curtain through any bearing, and the cell labels sitting where the towns are.
Built for showing people
Branded stills, MP4 and GIF loops, a lower-third and ticker, and a clean output window for OBS — for anyone who posts what they're watching.
Yours, and private
Everything runs on your Mac against free public data from NOAA and the NWS. No account, no telemetry, nothing uploaded.
A closer look
Questions, bugs, or a feature you want? Email me.