Hey! So you want to stop Sims from running inside when a blizzard starts?
Looks like the LootAction tuning (loot_Buff_Sim_SeasonWeather_Blizzard_Outside) with ID 183467 (0x000000000002CCAB) is what triggers the interactions.
You would need to remove the reactions sections.
This loot action is triggered by a weather_aware_component built into the Sim itself, so the least conflicting way of doing this is actually modifying that LootAction tuning file.
If you're using Sims4Studio, use the Game File Cruiser, find this LootAction file, add it to the package, and remove both of the mentioned reaction sections from the file. Then that package file is your mod.
You might need to remove the buff sections as well, but without testing, I can't be sure. You need to figure that part out on your own.
Now, there is more running inside interactions, especially for rain and lightning. For those, you should look at the Broadcaster (broadcaster_LightningStrike) with ID 183498 (0x000000000002CCCA) and LootAction (loot_Buff_Sim_Weather_Storm_Rain_Outside) with ID 183455 (0x000000000002CC9F).
Hopefully, this is clear enough. Good Luck!