After re-reading the original question in entirety I would have to say no.
That is only because of the fact that Sion survived due to his hatred and his will. I believe that he would be unable to focus that hatred and will with such control to create the storm, without dying himself.
To put plainly, by trying to double task the thing that keeps him alive to activate something else he crashes the system.
However, if he was whole to begin with and had access to Palp's library, then pretty bloody likely he could have-Arch Angel Eyes
No,he couldn't.He's too busy keeping himself together to make a Storm like that,he'd rip himself apart considering he can't control keeping himself together and a Force Storm at the same time.And he doesn't have as much hate and anger as Sidious,even the Sith Spirits on Korriban in EE said that Sidious was the pure inbodiment of hate and anger,aswell as the DE Sourcebook confirms this aswell.-Me
And notice that I disagreed with Arch Angel Eyes assessment.Sion can't control a Force Storm while holding himself together at the same time,that would require more control over a Force Storm than even DE Sidious had ,which I highly doubt Sion could do.And I listed two canon sources aswell,to confirm my saying that Sidious was the inbodiment of hate and anger,and my answer was shorter and more to the point than Arch's was.
As you see,both posts are entirely different with entirely different outcomes aswell.
And are you going to answer my question?Or are going to keep evading it?