This is a great thread! I love the citing of issues and the scientific and logical analysis of powers. Some great knowledge and argument in here. I've had my Storm-obsessive moments too. Too bad that the movies only touched on the abilities of both Storm and Iceman. Only a TV series could really feature all the various intricate uses of powers.
Regarding the story where Storm glides on solar wind and creates a hurricane to blast a Sentinel...
That always troubled me. But it's plausible. Firstly, there is such thing as 'space weather' (
http://en.wikipedia.org/wiki/Space_weather). Energy and matter move around within all environments, whether or not they have an atmosphere. The earth's own weather is created by the exchange of energy - it arrives from the sun (heat + particles that cause electrical charge), builds up into extreme weather events like storms and transfers itself to the earth, with earth and air creating a giant circuit.
When Storm dispersed a blizzard (in the story where they first fought Alpha Flight and Shaman's mystically-created weather system went out of control), she drew stored electrical energy from the earth to neutralise the energy of the blizzard. The story said she was 'forced' to tap into the earth's energy...but later the writers seemed to imply that she regularly drew on the energy of the earth. Electromagnetic energy is created by the earth's core rotating (thus creating the planet's EM field) and also by pressure acting on any rocks containing quartz crystals (such as granite). That's called piezoelectricity and is also seen in those devices used to light gas stoves - you press a button and it creates an electrical spark by pushing on a piece of crystal.
Anyway, back to that solar wind. The solar wind is a plasma - a superheated gas that has become electrically charged.
http://en.wikipedia.org/wiki/Solar_wind It consists mainly of ionised (charged) hydrogen, with some helium and other substances including oxygen and nitrogen. The earth's atmosphere consists of nitrogen, oxygen and other gases in a mixture called 'air'.
It's quite conceivable that Storm would be aware of the solar wind, because she is aware of gases and also of electricity, and the solar wind is both - an electrically-charged (ionised) gas. It's also conceivable that she could instinctively create a controlled disturbance in the solar wind that would allow her to carry herself as if flying on atmospheric wind. It's also conceivable that she could manipulate the gases in the wind so they were similar in composition and behaviour to normal earth 'air' and then turn that air into a gale-force wind.
I don't mind Storm - or Iceman - having weaknesses that make them human and make them have to work hard in any confrontation to defeat the odds. That's what makes characters interesting, much like Superman's kryptonite.
I'd love to see more X-movies so we could see more creative uses of Storm and Iceman's abilities. Subtle and constructive uses, creative ones as well as destructive.