Will warm greywater hurt trees in winter?

Here in Denver, fruit trees tend to break dormancy too early in warm spells. Will running warm greywater into mulch basins make this worse by keeping the soil and roots warm? Is there anything I can do to counterbalance this? Does anyone else have this problem?

Hi Gilbert,

Your drain length will have some bearing on it, because as the water flows out, it loses temperature.  Mine is 60' long and I've never seen or felt warm water come out of it.  And if it is a short drain, I think once it hits the soil it will lose btu's quickly, especially in winter.  
Not sure of your set-up, but I wouldn't have the drain running directly to the base of one particular tree.  Roots would probably stay too wet.  You probably have it set back enough that you don't have to worry about that, but it's just a thought.