Minecraft weather change (rain/snow)

currently "/weather rain" makes it rain or snow in the current biome depending on its climate. instead i think these weather occurrences should be assigned their own command to allow for the player to set ANY biome any type of weather, for example:

"/weather rain", "/weather snow".

thus differentiating rain from snow and allowing both to occur in any biome instead of needing a snowy biome to allow for snow.