Stormi is the modern American spelling of Stormy — from the Old English storm — a modern American word-name in the broader 2010s-2020s aesthetic. A top-1000 US baby name since 2018.
Stormi does not currently appear in the US Social Security Administration's top 1,000 girls' names, so we don't publish a US rank or birth count for it. That says nothing about the name's standing elsewhere in the world — only that it sits outside the ranked US data we rely on.
In Pythagorean numerology the letters of Stormi reduce to 4, The Builder. This is a traditional interpretive system, not a factual claim about the name.