Just because the air temperature ticked 60 doesn't mean the soil temperature did.  I don't see any soil temperatures above 50 in the northern 2/3 of Illinois.  I doubt any N has been lost, with or without N-serve.  It has to be 50 degrees for the conversion to nitrate, and that's what moves if my understanding is correct.  I've seen water standing on fall NH3 fields when the temperature is cold without any problems.  When it's warmer and there is water standing, it gets lost FAST.