[bjs1779]

School is optional. Ice fog out here, 4 miles from town.

What is ice fog? Are you from Fairbanks?

[RightWhale]

The dog has learned a new word. When I say cold he growls at me like it is my fault.

[Laserman]

"What is ice fog?"

Ice fog is a cloud of microscopic ice crystals that are too light to settle quickly out of the air. They form when exhaust moisture from car engines, aircraft engines, or other vapor sources encounter extremely low air temperatures.

As a pilot, landing on an airfield in Alaska at 30-60 degrees below, the ice fog will be thick within 40 feet of the ground, and you experience complete whiteout just as you round out for touchdown. Very exciting.

Also, taxiing back to the hangar is a challenge since you can't see the markings on the taxiways or the lights on the side. Often the people in the tower, who are above the fog, give directions to the aircraft crew.

[AlexW]

"What is ice fog?"

My impression is that it is "hoarfrost" (spelling may vary)
In Tennessee, it was normal in the mountains, but rare in the low elevations.
It is fog that freezes.
Here in Bratislava this week, there were three mornings
of heavy hoarfrost on all trees and vegetation. It is quite nice to see.