Latent heat. That is why they spray water on the oranges to
reduce frost damage.

After a day or two at below freezing, but near freezing
temperatures in stable air, there will be little airframe
ice because the water has finally frozen.
But with unstable air, more fresh and liquid water is being
cooled into the supercooled range and that makes structural
ice.


wrote in message
ups.com...
|
| Bill wrote:
|
| In fact I've noticed when there is ice about and the
temp is near
| freezing that
| it tends to stay that way -- no rate at all!!
|
| I've noticed that too, and always assumed its because of
the ice
| buildup on the thermometer.
|