This modpack uses weather2 localized weather mod by corosus and a modified config being in a plains biome is also recommended use customized setting on world creation to spawn in a plains biome always. Also wait until the clouds fully cover up the sky then thats how you know you are ready to start it if you start it to early no storms are gonna spawn

(Notice) In Floodblood, the term "blood" doesn’t refer to bloodshed or violence. Instead, it symbolizes the dangerous, destructive weather patterns that plague the world. The chaotic storms, hail, floods, and ominous clouds all stem from a malevolent force, a darkness lurking in the shadows. This horror overwhelms the world with unnatural and aggressive weather, making survival a constant, terrifying struggle against the elements rather than physical conflict. The "blood" represents the ever-present, supernatural terror of the environment.

Elements of Floodblood

Flash Floods: What starts as a sprinkle turns into a flash flood in seconds. Low-lying areas are submerged fast, and anything not elevated is at risk of getting swamped or swept away.
Constant Lightning: With Bigger Lightning Storms integrated, lightning isn’t just a pretty light show. It’s a blinding, endless barrage that can strike anything, set fires, and illuminate the darkness like an electric strobe. Fires started by these bolts are unstoppable, so don’t think they’ll burn out on their own.
Unrelenting Darkness: Floodblood plunges the world into near-blackness within moments, intensifying the storm’s atmosphere. The only light source is the lightning, making navigation a nightmare and heightening the overall danger.
Tornadoes and Cyclones: Tornadoes spawn, rip through the landscape, and cluster with other tornadoes, turning whole areas into disaster zones. Cyclones then form, creating even larger, more destructive whirlwinds that make survival nearly impossible if you’re caught in their path.
Hail Bombardment: Hailstones the size of boulders rain down, acting like miniature meteorites that crash into players, mobs, and structures. Taking shelter is critical; staying outside is basically a death sentence.
Landscape Destruction: The combined forces of water, wind, fire, and hail leave your world looking like a post-apocalyptic wasteland. Trees are stripped, blocks are scattered, and any structures not built to withstand the worst are reduced to rubble.
Floodblood Fire Hazards: With lightning-induced fires that refuse to extinguish, it’s a recipe for widespread devastation. Every strike leaves flames burning indefinitely, amplifying the storm’s destructive impact.
Extreme Survival Demands: Floodblood is designed to challenge even seasoned Minecraft players. Food, shelter, and mobility become matters of life or death, as you have to juggle survival tactics just to withstand the onslaught.
Resource Strain and Potential Crashes: Floodblood’s intensity can strain game resources, and if it goes on too long, expect some serious lag or outright crashes. Floodblood doesn’t just test your survival skills; it tests the game’s tolerance for chaos.
Psychological Pressure: Floodblood amplifies stress with its unrelenting, unpredictable nature. Just when you think you’ve caught a break, another tornado, cyclone, or lightning bolt reminds you that there’s no peace until the storm decides it’s over. or until you decide when

Floodblood is a brutal gauntlet for anyone brave (or foolhardy) enough to face it. It’s not for players looking for a gentle challenge; it’s for those ready to see if they can endure everything the game has to throw at them... and more.

How to start: Use /weather thunder to start it /weather rain to calm it down /weather2 storm killall to stop it

Yes im using tektopia with this modpack

Sometimes it won't get dark and so you might need to fiddle with the weather world creation ect.

in the new update it fixed the thing sorta or more likelier so still try this Also this modpack also puts pollution of the realms and a little bit of extra spice and twisted tweaks.

Floodblood happening

Floodblood Catastrophic Weather

Advanced Darkness

Bigger Lightning Storms

Collective

Controlled Burn

CoroUtil

Fantastic Lib

ForgeEndertech

GunpowderLib

Marbled's Weather2 Retextured [MW2R]

Mo' Villages

Night Vision Goggles

Oh The Biomes You'll Go

OreLib

Pollution of the Realms

Puddles

Simple Sponge

Some Like It Dry

TekTopia

Twisted Tweaks

Village Spawn Point