GalacticStorm
Smart Alec Know-It-All
Ok. Let me sort this out. I believe Storm would win. Why?
For a start her lightning can and has very well hurt him in the past. Shortly after the dark phoenix saga in uncanny xmen Storm after being trapped in a chrome form by Doom was released and she was temporarily driven mad. She attacked both Doom and her fellow Xmen. Colossus tries to approach storm to take her out but her winds were too strong for him to move and her lightning bolts which were naturally attracted to his armoured form made approaching her too painful anyway as he stated. Storm wasnt even directing shooting at him but what did manage to connect with him certainly hurt him. Imagine if she did hit him directly.
In uncanny xmen when the team travelled to antartica to stop Magneto from unleahing a worldwide E.M.P wave a powerful lightning bolt attracted to his metal form struck him and Rogue who was in the near vicinty. They were both floored. Rogue was unconscious.
In a battle to the death a barrage of full intensity lightning from Storm would most certainly hurt Colossus.
Storm also has the ability to manipulate the bio-electric field which permeates all living beings. Storm when endangered by the intangible mutant Shinobi Shaw threatened to shut down his organs by shutting down his field something she claimed to be able to do despite his intangibility. Colossus in metallic form could also be dealt with in such a manner if her life was at risk.
Colosssus is very durable, however he is far from impervious to harm. Riptide of the Marauders has hospitalised him through gale force propelled projectiles. Storm is certainly capable of the same thing. As previously mentioned straw can pierce concrete in hurricane force winds. Straw and grass piecing walls or trees is a regular occurrence in major storms worldwide. In a cityscape there are plenty of objects which storm could use for a similar effect. It would definitely work. Just think it happens all the time in storms. If Storm is directly propelling metal poles or the like at colossus with the intention of piercing his armour then of course it would work if the like happens all the time during storms and just by accident. Riptide can hardly outclass Storm in the wind generating stakes.
Also Storm could certainly restrain him with winds. Emma Frost who is class 50 was easily restrained by storm with her winds with no effort from storm at all. Colossus is a low level class 100. With a bit more effort it is certainly within her capabilities.
Also you lot are seriously over-estimating colosuss' durability. If he was tossed about in hurricane force winds, slammed into buildings, slammed into the ground he would eventually be knocked unconscious. He is not juggernaut. He has been hurt by Storms lightning before. He was floored by a powerful lightning bolt, he has been hospitalised by riptide, AOA colossus was killed by Gambits powers.