Weather Flux
by FluxFlur
Weather Flux brings simulated tornadoes, storms and supercells to Minecraft, generated procedurally for NeoForge on 1.21.1.
What it does
Weather Flux models severe weather with a wind engine, squall lines and a global wet and dry regime that sets where rain and snow fall. Storms form as supercells whose depth is calculated from the simulation, and real tornadoes can develop inside them. Snow and sand accumulate on the ground as weather passes over a world, so the terrain shows the conditions that have occurred.
The mod runs on NeoForge only, for 1.21.1, and it has to be installed on the client and the server, since both sides run the simulation. Its latest file is v1.3.0 for 1.21.1, published on 2026-10-13, and the mod was first published on 2026-07-24. The code is released under All rights reserved, so it is not open source.
Key features
Procedural tornadoes
Tornadoes form inside storms that the simulation generates, rather than appearing from a fixed script.
Supercell storms
Supercells develop with a depth computed from the simulated atmosphere, giving storms varied strength and shape.
Squall lines
Lines of storms can advance across the map as a group, bringing sudden changes in wind and rain.
Snow and sand buildup
Snow and sand collect on the ground during weather, so the surface reflects recent conditions.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Storm-heavy survival worlds
Players who want frequent severe weather in a survival world can use the storm and tornado systems to shape their surroundings.
Shared multiplayer weather
Because the global wet and dry regime applies across the world, server owners can run one weather pattern for every player.
Who it’s for: Players and server owners who want simulated severe weather in NeoForge 1.21.1 worlds. The project is an early-stage build by FluxFlur, so server owners should expect changes between versions.
How it compares
Natural Regrowth for ProtoManly's Weather is open source under the MIT License and runs on NeoForge 1.21.1 with client and server installed, but it focuses on vegetation regrowth. ProtoManly's Weather is also client and server on NeoForge 1.21.1, under All rights reserved and not open source. Storm Spawner is another client and server NeoForge 1.21.1 mod under All rights reserved, which controls where storms appear.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Weather Flux | NeoForge | 1.21.1 | Client and server | 2026-10-13 |
| Natural Regrowth for ProtoManly's Weather | NeoForge | 1.21.1 | Client and server | 2026-08-01 |
| ProtoManly's Weather | NeoForge | 1.21.1 | Client and server | 2026-10-01 |
| Storm Spawner | NeoForge | 1.21.1 | Client and server | 2025-08-26 |
Questions
Does Weather Flux need to be installed on the server?
Which loader and version does Weather Flux support?
Is Weather Flux ready for long-term use?
In the catalog
Weather Flux is one of 29,952 Game mechanics mods on ModsFinder, and one of 12,140 Game mechanics mods for NeoForge. 32,366 mods support Minecraft 1.21.1.
Similar mods
What the author says
This is a passion project built from the ground up, and it is still early in development. Expect bugs, expect missing features, and expect things to change quickly as we keep building it out.
Official listing
- Modrinth page
- modrinth.com/mod/weather-flux
- Owner
- FluxFlur
- Published
- 2026-07-24
- Updated on Modrinth
- 2026-10-13
- Facts verified
- 2026-10-15