Welcome to the fun of snow removal, Mowman. The ground is still warm enough that the snow at ground level is melting, while air temp may be well below freezing. When you churn up this wet snow or slush into the cold air, it freezes in place on augers. You did the only thing to do - knock off for a while. I have only had this happen half a dozen times in 20 years.<p>Sometimes the conditions are just right for this to happen for only a couple of hours, and you can go back to it. I have a wooden club (broken shovel handle) attached to the blower for cleaning plugged chute and knocking buildup off of augers.<p>----------<br>Jim<br>South Bend, IN