Yes, it is. However, in Conan Exiles, “the gamma goes pure white and you can’t see anything”* has been a known issue for a year or so, it’s not working as intended.
If you would like a brighter variant -or any variant, in fact- of the sandstorm, feel free to suggest this in a seperate thread.
*except in some cases, some horridly contrasted textures.
See below reply:
And this other issue, being missing visuals/sound, which began around the same time:
Also cc: @ConanBoDk, who I encourage to post their videos of the sandstorm(s) in a seperate thread. If you aren’t able to post/link a video in your post, get the essential part of the link, i.e. for YouTube, the part usually behind https://www.youtube.com/watch?v= in the URL -you can copy and paste this-. Otherwise, you’ll need to be a little more active on the forums to get this permission (see forum guidelines for requirements).