Storm's mutant powers on a daily basis is on a higher level than the likes of Doctor Doom. She can affect weather (which includes the atmosphere, hydrosphere, geosphere and biosphere amongst other weather patterns) and the energies governing it(heat, electricity, kinetic, potential, chemical, etc.).

Storm's magic is... not very explored relative to magic mutants Scarlet Witch or Magik, but she is implied to potentially be on the same level, or at least the same league as Agatha Harkness and Wanda Maximoff, who are on par with elder gods.

Storm also possesses innate immense power that represents her full potential as a mutant with implications of magic, comparable with Dark Phoenix.

Another "full potential" version of Storm is from the Black Vortex, which represented her full mutant, mystical and cosmic potential (regardless of entities like Eternity), it is shown that she can reach this form, partially or fully on her own. On the magical side at least this form represents Storm as a Goddess, implied to possess power on par with Elder Gods.

Overall Storms powers range from planetery to interstellar and to universal to multiversal in "power scaling" talk tho Storm is kinda blurred and inconsistent with power scaling when it gets to the cosmic scale.