Forge-0.9.0.0-alpha is an alpha file of the Minecraft mod Project Atmosphere: Realistic Climate & Weather for Forge, made for Minecraft 1.20.1. It was published on June 13, 2026 and is 14.1 MB in size. Pre-release builds can contain bugs — back up your world before installing. For the full description, screenshots and every other version, visit the Project Atmosphere: Realistic Climate & Weather mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.
