⚡ HAARP Weather Control

The forecast is whatever you want it to be.

/haarp 5    →  a thunderstorm rolls in
/haarp 16   →  the sky darkens with falling ash
/haarp 13   →  the moon turns red
/haarp cancel  →  the clouds part

Two characters in chat. The sky obeys. That's the whole interface.

What it is

A small, server-side weather plugin for Hytale: 22 themed weather programs, one command, zero setup. No crafting, no client install — your players just watch the sky change.

The 22 programs

Type /haarp for a colour-coded menu — green = ready, red = on cooldown. Activate by number, full name, or fuzzy prefix:

/haarp 5   ·   /haarp thunderstorm   ·   /haarp thunder

#	Weather	Runs for	What it does
1	Light Rain	120s	Gentle rainfall. Calming ambiance.
2	Clear Sky	180s	Stops all weather — blue skies return.
3	Light Fog	90s	Mild atmospheric haze.
4	Heavy Rain	240s	Intense downpour with dark skies.
5	Thunderstorm	300s	Lightning and wind. Dramatic but safe.
6	Dense Fog	120s	Thick fog blankets the area.
7	Dust Storm	180s	Sand particles swirl.
8	Blizzard	240s	Snow and ice effects.
9	Aurora Borealis 🌙	300s	Northern lights dance across the sky.
10	Electrical Storm	180s	Intense lightning show. Spectacular and safe.
11	Acid Fog	150s	Eerie toxic purple haze. Cosmetic only.
12	Radiant Clear	240s	Enhanced clear sky with golden light.
13	Blood Moon 🌙	300s	Massive red moon, twisted clouds. Cosmetic only.
14	Void Storm	180s	Void-event atmosphere — darkens the sky, and may increase dark-mob spawns.
15	Gentle Snow	180s	Soft, steady snowfall. Calm and wintry.
16	Ashfall Storm	240s	Dark skies and falling ash. Apocalyptic.
17	Toxic Cloud	180s	Thick poisonous haze. Cosmetic only.
18	Nightmare 🌙	240s	Oppressive horror atmosphere. Cosmetic only.
19	Volcanic Haze	180s	Smoldering volcanic sky.
20	Celestial Sky	240s	Bright skylands sky with drifting clouds.
21	Ghostly Mist 🌙	180s	Pale, haunted fog. Cosmetic only.
22	Firefly Night 🌙	240s	Calm night aglow with fireflies.

🌙 = looks best at night.

Each runs for a set duration, then expires on its own — start a five-minute storm, walk away, and the sky clears itself. Per-player cooldowns keep it fair; /haarp status shows what's live, the time left, and who triggered it.

Nothing here hurts anyone. No program damages players or passive mobs — Acid Fog doesn't burn, Blood Moon doesn't aggro your friends. It's pure atmosphere.

When you'll reach for it

Framing a build. The spire's finally done and the light is almost right → /haarp 20 (Celestial Sky). Golden hour, on demand.
Running a session. The party crosses the desert → /haarp 7. They reach the stone circle at midnight → /haarp 13. You never break narration.
Just vibing. It's a Tuesday, you're farming, and you'd prefer some drizzle → /haarp 1. Done.

Who can change the weather

By default, anyone can run /haarp — ideal for a relaxed server where everyone shares the sky.

Running something bigger? HAARP ships an opt-in permission gate. On first launch it writes a small mods/haarp/haarp_config.json:

weatherControl — "everyone" (default) or "permission"
controlPermission — the node to require (default haarp:control)

Flip it to "permission" and only players you grant the node (plus the server console) can activate or cancel weather; everyone can still view the menu, /haarp status, and /haarp help. Leave it untouched and nothing changes — no setup required.

Good to know

Manual, not automatic — programs run, then end. For an automatic seasonal sky, pair it with Turning Seasons (also mine).
Server-side only — no client install, no dependencies, ~23 KB, loads in a tenth of a second.
Hytale Update 4, 5 & the Update 6 pre-release.

Install

Download HAARP-3.2.5.zip and extract it — then copy only HAARP-3.2.5.jar into %APPDATA%\Hytale\UserData\Mods\. ⚠️ The .jar, not the .zip — the zip is just the download wrapper and the mod can't run from inside it.
Upgrading? Delete the old HAARP-3.x.x.jar first (and any HAARP .zip that ended up in Mods).
Enable HAARP Weather Control in your world's mod settings.
Type /haarp. The sky is yours.

⚠️ Getting "Command not found! haarp"?

The mod's code isn't loaded — in every case so far, the .zip was placed in the Mods folder instead of the .jar (it can even show up in the mod list that way, looking installed while containing no runnable code). Fix: delete the HAARP .zip from Mods, copy the .jar in, make sure the mod is ticked on for your world, and restart the world.

Missing a weather you'd love? Drop a comment — I read every one.

Type a number. Watch the sky obey.

— LordDionysus ⚡