Is it possible to rain indoors?

Darn tooting!

Hangar One at Moffett Federal Airfield in Mountain View, CA. Built in 1930 to house military dirigibles.

It has been a skeleton for 12 years or so (it was stripped down, after asbestos was discovered), but back in the day, thunder storms can form inside. They were planning on restoring as a historical site.

Sure. I remember when I was a kid we made ‘rain in a bottle’ science projects

Yes... That's how I found out that the boiler in the property upstairs had blown.

{@laffytaffy] 😆 yes if you have a hole in your roof

Yes. That's when you call a roofer.

It could be raining inside the Tennessee aquarium it’s a big building and there’s a tall nasa building that has rumors that it rains in the building on very humid cool days. Moisture can condensate and become foggy clouds and fall down as precipitation.

I suppose if your roof is leaking.

I think they call it sprinklers.