Storm is from the Old English storm (tempest) — a 20th-century weather-name in the lineage of Summer, Rain, Skye, and Winter. Originally a unisex name; the major namesake for girls is the X-Men character Ororo Munroe / Storm, the weather-controlling Kenyan-American mutant princess who has appeared in Marvel comics since 1975 — created by Len Wein and Dave Cockrum. Storm is also the nickname of Sebastian Stan's character in Phantom Limb (2019). Storm is the name of Kim Kardashian and Kanye West's nephew Saint's cat.
Storm 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 Storm reduce to 4, The Builder. This is a traditional interpretive system, not a factual claim about the name.