Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A fog of ice particles.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun A dense fog that consists of fine particles of ice.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun a dense winter fog containing ice particles

Etymologies

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Examples

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Comments

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  • Frozen fog, essentially. It occurs at temperatures of -20 F or so and can become so thick at colder temperatures that activities are canceled. Quite beautiful if there is a bit of sun illuminating the ice crystals. Very annoying in the dark...

    November 5, 2007

  • Sounds lovely--unless you have to navigate through it. I've pinched this for my list of bizarre weather events. :-)

    November 5, 2007

  • Reesetee--you might also want to add chinook to that list. In Alaska, a chinook is a warm, moisture-laden wind out of the south during winter. I've been outside when the temperature has risen from -20 F to +28 F in the space of about an hour due to a chinook. Also sometimes referred to as the pineapple express, since the air mass usually comes from Hawaii, straight up the Gulf of Alaska.

    November 5, 2007

  • That brings up a good question, skipvia--is a chinook (or for that matter, ice fog) an uncommon event? Sounds as though it's seasonal. I think I was going for unusual weather events on that list, and now I'm wondering whether ice fog fits the bill, too. Still, would be fun to add both. :-)

    November 5, 2007

  • Chinooks are definitely seasonal, depending as they do on warm winds from the south replacing the normally cold and dry air over the interior of Alaska. But they're not regular or expected--they just happen sometimes. Ice fog occurs as a function of of the convergence of several conditions--a thermal inversion (warmer air aloft trapping cold air below), no wind, and a build up of moisture which can occur from any source of combustion (e.g., auto exhaust) which freezes and doesn't dissipate.

    So--hope this helps a bit with your list dilemma.

    November 5, 2007

  • Thanks! Wasn't much of a dilemma--I added both. :-)

    November 6, 2007