BQCOM

Here's a solution. 

Hello,
The answer to the snowing in the air and North Yankton area is this: https://www.gta5-mods.com/scripts/simple-trainer-for-gtav
As for snow on the ground: https://www.gta5-mods.com/scripts/singleplayer-snow
 
DISCLAIMER: I do NOT take responsibility for anything that happens to your game. These are recommendations, if anything happens, make sure you are using a mods folder or reverse what you put in to solve the problems. And please, please, make backups!
 
Best of Luck!

Here's a solution. 

It may be a problem with your trainer settings.
  
1. Open trainer (F4 by default) 
2. Uncheck Never Wanted, Cops don't dispatch, Police ignore player (make sure this options are disabled)

Thats it! Thank you.