It would need to be magick that could use that sort of energy and work well with it. I wouldn't use it for a friendship spell =s
But, yes, the energy of a storm is intense and can be used well in spells/rituals that are more aggressive in nature.
But a few months ago, a few brave members here proved a theory we were discussing. The experiment went well, and no one was hurt. DO NOT go outside during a storm and raise energy. Most here (including me) agree that lightening/electricity and the energy we raise in magick have a close resemblence, and a few people here went out in a storm and had some very freaky close calls with lightening and ball lightening (even when the storm was yet to have lightening). You can safely channel the energy from the safety of your home. Don't risk your life!