1/ WriteRack is the easiest way to tweetstorm.
2/ or thread tweets
3/ or create numbered tweets.
Basically, it’s the best way to go beyond the 140 character limit on Twitter and keep your narrative coherent.
You can type a post of any reasonable length, attach images then post. We'll break it up and send to your twitter account applying our **algorithmic formula to ensure proper formatting. Most importantly, all tweetstorms are aggregated at writerack.com/twitterusername
It is free to use basic features but signing up for premium gives you much more.
**I hope that meaningless word impressed you ;).