You know, I wouldn't mind if the Sims reacted to a thunderstorm or a blizzard *once* after it started, but they react repeatedly, interfering with all other interactions. It's a pain in the butt.
I assume there's a hack to stop this. I'd forgotten just how many stupid annoyances the devs added to this game to keep people from playing it.

-- Mal

Pescado's "Antiweatherreaction", or Simwardrobe's "NoReactingToRainOrSnow", maybe?
Both are linked to here (with a bit of possibly useful info) - https://modthesims.info/showthread.php?t=650113