CIS-13 in Minsk – it’s winter!!!

The probability of morale dropping is 4.2 - 8.3 - 12.5.

I've been wanting to ask this for a while. Is the maximum effective morale = 3, is this 100% true? It's not clearly stated in the game about this, the only hint is the table that is drawn only for morale from -3 to 3.