The sounds is there, the sky weather changes appropriately and the distant fog shows up... but the actual ash and blight storm effect (the one that looks like a sandstorm in your face) is nowhere to be found. I really liked it because I couldn't see 5 feet in any direction, but now I can literally see across the map just in a red or orange color.
One odd thing that happened was that I did see the effect in one very small area of the ashlands, but no matter how close I got it stayed the same size (until I got so close it disappeared underneath the land). Almost as though it's supposed to surround the player character but is stuck somewhere else?
Everything is updated to the latest patch/version (v064 for Morroblivion). Sorted with BOSS. I use Oblivion Reloaded, All Natural, and Atmospheres 4 (that effect weather) and they load before Morroblivion.esp. I have Streamline but I don't use the Streamsight feature.
My mod list is quite large, but I'll post it if requested. Please help!

Have you tried this All
Have you tried this All Natural compatibility patch for Morroblivion?
https://www.nexusmods.com/oblivion/mods/47665/?