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Re: Black Ice (archive)
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Posted by HS on February 08, 2000 at 21:48:56:

In Reply to: Black Ice posted by Waterside on February 07, 2000 at 16:25:04:

Oh, Ok. I'm a southlander (South Texas USA). The ground never freezes here. Bridges get cold enough. Then everyone stays home.

:
: : But water becomes ICE at 32 degrees. ??? How can the ground be colder than the air?


: This is exactly how "black ice" is formed: When the ground is still at a below-freezing temperature and the air is slightly warmer. Typically this will happen in early-morning but could happen at any time during the day.

: The moisture in the warmer-air comes in contact with the below-freezing ground and freezes, forming an oh-so-thin layer of ice that you may or may not be able to detect visually.

:



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