HRRR-Render Fahrenheit Research

Use this command to install HRRR-Render:

winget install --id=FahrenheitResearch.HRRR-Render -e

The world's fastest HRRR (High Resolution Rapid Refresh) map renderer, written in pure Rust. Downloads HRRR GRIB2 data from NOAA's AWS S3 bucket using byte-range requests, parses GRIB2 format, and renders beautiful weather maps as PNG using rayon parallelism.

hrrr-render

The world's fastest HRRR (High Resolution Rapid Refresh) map renderer, written in pure Rust.

Downloads HRRR GRIB2 data from NOAA's AWS S3 bucket using byte-range requests, parses GRIB2 format, and renders beautiful weather maps as PNG using rayon parallelism.

Supported fields

temp2m - 2m Temperature
dewp2m - 2m Dewpoint
wind10m - 10m Wind Speed
ref - Composite Reflectivity
cape - Convective Available Potential Energy
vis - Visibility
precip - Precipitation Rate
h500 - 500mb Geopotential Heights

Usage

hrrr-render --field temp2m --run latest --forecast 00 --output temp.png
hrrr-render --field ref --run 2024031512 --forecast 06 --output ref.png
hrrr-render --field cape --run latest --forecast 03 --output cape.png --width 1920 --height 1080

Build

cargo build --release

How it works

Fetches the .idx sidecar file to locate the requested field's byte range
Downloads only the relevant GRIB2 message via HTTP Range request
Parses GRIB2 sections (grid definition, product definition, data representation)
Unpacks data values (simple packing or JPEG2000)
Renders to PNG using Lambert Conformal Conic projection with color mapping
Draws state/country borders and a color legend