Wind: Seeing is Believing

O

olddogrib

Newly Enlightened
Joined
Jan 1, 2014
Messages
34
You can't argue when you can see it happening. I bowhunt the Blue Ridge Mtns. Where the fickle winds are constantly pooling eddying and changing directions. I've been at it long enough I would consider myself an above average judge of wind direction/speed without pulling out my talcum bottle. After all, it isn't "rocket science"! Even here, during the warm weather of Sept.-Oct. the winds are mild and predominantly out of the south/southwest. When the "gales of November" come they're strong and out of the Northeast. We've had three straight weekends of 60-70 deg. temps with mild breezes out of the SW, perfect for my blind. Except this morning there was a pea-soup, wet fog. I wouldn't have even bothered except I left my bibs and gear in the stand yesterday evening (bad move as they were drenched, even under roof). I have a green LED headlamp that I wouldn't have need but for the the fog, due to the full moon. I can't say that it's better than my old red one, but I haven't been busted going to the stand for three months. The weird thing is that with it I could clearly see the ca-billion tiny droplets of water moving by horizontally at a fairly brisk rate. If I'd been asked, I would've said it was dead-calm! I won't argue whether the pattern was typical thermals (as it was moving slightly up the ridge more than just "rising") of just a freaky breeze due to the fog. The one thing that can't be debated is it was wrong for me hunting that stand and I didn't see squat. Yea, yea, I know you're all going to say all the humidity was washing my scent out of the airstream...tell that to the deer!

This is basically a copy of a post I made on a traditional archery sight with a different question. Was I able to observe this because of the LED headlamp, because it was green, or some other reason? I've bowhunted for about fifty years and while I don't like to hunt in fog, I seriously doubt it's the first time I've been out in it. I previously used an incan Maglite with and without a red filter, but never noticed anything like this. To me dense fog in vehicle headlamps looks "solid". This effect was quite striking and surreal, in that the green LED seemed to penetrate it and make the tiny water droplets fluoresce. I'm still amazed I could visually observe that much air movement that I could in no way feel!
 
A

aznsx

Enlightened
CPF Supporter
Joined
Apr 24, 2015
Messages
415
Location
Phoenix, AZ USA
Thanks for posting this. I absolutely believe you were seeing what you believe you were seeing (if that makes sense). That phenomenon fully supports a working 'theory' I have regarding the use of light with spectrums high in shorter wavelengths of visible (LED-emitted) light in the presence of aerial particulate matter, and perhaps especially moisture. I'm referring to it as a 'theory', not because I lack confidence in its validity, but because I lack the knowledge to fully explain / prove the phenomenon. It is responsible for some of the light 'scatter' which occurs with shorter wavelengths, which is something which generally works against us, but which in your specific example, works in your favor.
 
KITROBASKIN

KITROBASKIN

Flashlight Enthusiast
CPF Supporter
Joined
Mar 28, 2013
Messages
3,888
Location
New Mexico, USA
Consider that a headlamp brings the light closely aligned with your eyes. This does some interesting things; spider eyes glitter like precious jewels, ice crystals can come alive with reflected light, and heavy moisture is very visible close up where the light beam shines. Heavy fog under those conditions require removing the light source away from your eyes. Even better would be for a partner to light your way from a distance to the side. Partner's ability to see is compromised but if the light is shined ahead of you, the heavy vapor right in front of you is not scattering the light.

One bitter cold, clear night, walking briskly with the dog, the wind speed and direction matched our pace. Craziest thing was having this bank of breath vapor following along with me, obstructing my vision in a most frustrating manner.
 
bykfixer

bykfixer

Flashaholic
CPF Supporter
Joined
Aug 9, 2015
Messages
16,006
Location
My own little Idaho
A headlamp in southern summer makes me want to put on scuba gear when I see the million-billion water droplets near my eyes.
 

Similar threads

Pydpiper
Replies
10
Views
1K
piper
piper
K
Replies
15
Views
2K
KC9KFJ
K
T
Replies
8
Views
1K
wmirag
W
L
Replies
30
Views
9K
VidPro
V
Top