How to create Sheet of Rain?

I’m trying to achieve a sheet of rain for a localized storm and I can’t seem to find any tutorials or even know what type of particle system I would need to do this. I’ve made just rain and amped up the spawn amount of the rain, created two rain particles to give a foggy look and hide objects on the inside but it doesn’t look good. Any help in creating this clean wispy sheet of rain would be nice!!! Thank you.

Note, I would like to be able to get the mist at the bottom too. Would that be a separate particle system?