Ibra wrote:
From today, anyone can guess what kind of “65kts fog” is this ?
The kind you find in the North Sea whenever you really want to get off of a Rig… 
HZ can also be smoke – if you look at METARs around the recent California fires, you’ll sometimes see FU (smoke) and sometimes HZ, presumably depending on whether there was a human involved who can smell the smoke.
I’ve been a Mojave with these kind of winds, though not quite as extreme as that. The takeoff run was pretty short, but taxiing was a challenge.
I would guess haze from blowing sand
From today, anyone can guess what kind of “65kts fog” is this 
?
Peter wrote:
So why doesn’t fog form when the air is moving?
Come to the Isle of Man. I’ve seen fog in 40kts+ of wind.
Peter wrote:
So why doesn’t fog form when the air is moving?
It does – you just can not see it because turbulences and lateral flows (caused by “micro orography”) makes it dilute with the air layers above.
If the 30cm fog in your picture mixes with the 60cm of clear air above item you hardly recognize it as fog.
Yes 3kts and it will clears up
Peter wrote:
So why doesn’t fog form when the air is moving?
Actually it does if it moves slowly 2-3 kts is what is needed.
@Peter it does if it is advection fog
