How does the salmonmeter work? When do you get an emergency round?

It's an argument between me and my SO:
When do you get a emergency round? When all players salmonmeter is full, or when one of the player's meter is full?

The chance is based on the combined values of the meter in the topright for each player, https://twitter.com/LeanYoshi/status/1578081235397664770 . The meter goes from values 05 and increases by 1 each game, and you only have a 100% chance of encountering Cohozuna if all team members have a full gauge.
If one player's meter is full, you have an absolute minimum chance of ~1.5%, but if you have stuck with the same team members for at least a few games, the chance should be somewhat greater than that.