njxc500
Posts: 194
Joined: Mon Dec 24, 2007 6:47 pm

Question For The Experienced "Weather"

Tue May 27, 2008 2:59 am

I have a question to pose for those who have seen it all. I'll start by stating that I was flying today at 2500' with clouds about 1000 or 1500 above me. I was moving along fine, and I see something just to the left of my path, and it is difficult to describe, and the pictures didn't turn out....It was a cloud to ground area of something. I can best describe it as looking like a small localized rain shower, except it was brown.... It was over a farm field that appeared it might be dusty. This was also occuring in a "less populated" area. I have about 300 hours flying now in Minnesota, and this one caught my eye quick. I deviated and stayed about 15 miles from this spot. This was definitely something I hadn't seen before.

What could cause this?

Small twister, updraft, or some small local phenomenon.

I would love to hear your thoughts.

Nick
 
Jpax
Posts: 715
Joined: Sat Aug 05, 2006 5:01 am

RE: Question For The Experienced "Weather"

Tue May 27, 2008 3:10 am

It was most likely a phenomena known as "chocolate rain."

You can learn more about it by watching this video:




 Wink
 
Lexy
Posts: 1265
Joined: Wed Jun 07, 2006 10:05 am

RE: Question For The Experienced "Weather"

Tue May 27, 2008 3:13 am

That's the single most disturbing video I have ever seen in my entire life.


Most likely a updraft or downdraft of some sort. Was this in the vicintiy of a thunderstorm? If so, then either of the two possible scenarios is likely.

Edited for spelling.

BTW, I took a look at Tay Zonday's website and he is quite talented with his voice without a doubt. That song above just caught me way offguard. LOL!!!

[Edited 2008-05-26 20:14:34]

[Edited 2008-05-26 20:23:50]
Nashville, Tennessee KBNA
 
njxc500
Posts: 194
Joined: Mon Dec 24, 2007 6:47 pm

RE: Question For The Experienced "Weather"

Tue May 27, 2008 3:23 am

This was one day after the tornadoes they are talking about, the day was fairly stable, and the cold front had already moved in. I could see an updraft causing this but I doubt downdraft, because it was very fixed in shape, like a rainstorm has edges...

Nick
 
Lexy
Posts: 1265
Joined: Wed Jun 07, 2006 10:05 am

RE: Question For The Experienced "Weather"

Tue May 27, 2008 3:25 am

Very fixed in shape? WOW! You've got me on that one my friend. Let me research a bit and i'll see what I can come up with for ya.
Nashville, Tennessee KBNA
 
bond007
Posts: 4423
Joined: Mon Mar 14, 2005 2:07 am

RE: Question For The Experienced "Weather"

Tue May 27, 2008 3:46 am



Quoting Lexy (Reply 2):
That's the single most disturbing video I have ever seen in my entire life.

Wow, you REALLY need to get out more!

Jimbo
I'd rather be on the ground wishing I was in the air, than in the air wishing I was on the ground!
 
KFLLCFII
Posts: 3179
Joined: Sat Sep 11, 2004 7:08 am

RE: Question For The Experienced "Weather"

Tue May 27, 2008 3:38 pm

A shadow?
"About the only way to look at it, just a pity you are not POTUS KFLLCFII, seems as if we would all be better off."
 
njxc500
Posts: 194
Joined: Mon Dec 24, 2007 6:47 pm

RE: Question For The Experienced "Weather"

Tue May 27, 2008 4:40 pm

No, this wasn't a shadow, I have seen plenty of those. This was different, and really caught my eye. I am now told that that my rear passenger has a picture, I'm not sure of the quality, but I will post it ASAP.

Nick
 
rampart
Posts: 1798
Joined: Sun Aug 07, 2005 5:58 am

RE: Question For The Experienced "Weather"

Tue May 27, 2008 6:01 pm

I teach intro meteorology (not my main thing, but I know some), and I'm a Skywarn member, so I'll take a shot, witthout seeing a picture and going from your description.

1) It could be a garden variety dust devil, some can get quite large. Here's a good picture: http://www.britannica.com/eb/art/print?id=19655&articleTypeId=0 , or try http://www.nasa.gov/vision/universe/solarsystem/2005_dust_devil.html

2) It could have been a weak tornado, but you indicate that the weather was relatively stable, and didn't mention that it was associated with a mesocyclone thunderstorm.

3) It could have been a "cold air funnel" or "landspout" that might have picked up some dust. These are more akin to waterspouts, weak compared to a tornado and not needing a supercell thunderstorm, but still a bonafide vortex. Here are a couple pictures: http://commons.wikimedia.org/wiki/Image:GID_Landspout.jpg , or http://www.srh.noaa.gov/lub/images/events/2007/20070927/tor_4.jpg

Love to see your picture if you get one. If you can't get it up here on the thread, IM me.

edit: let me also add downdraft or "gustnado", even though you don't think downdrafts are involved. Downdrafts can pick up dust and if wrapped into a small vortex can appear "defined". Here's another picture: http://www.crh.noaa.gov/mkx/document/wind/images/100402/gustnado1.gif They are caused by downdrafts.

-Rampart

[Edited 2008-05-27 11:06:08]

[Edited 2008-05-27 11:06:42]
 
Meteorologist
Posts: 99
Joined: Tue Nov 09, 2004 5:01 pm

RE: Question For The Experienced "Weather"

Tue May 27, 2008 6:17 pm

As a meteorologist, I'd be curious to see what pictures you have because I'm not entirely certain what you might be talking about, however my guesses would be dust devil or land spout as Rampart said. Dust devils are very common out west here in drier areas where low level stability can be very low due to a super adiabatic layer near the surface about some dark colored farm lands but the deeper layer wouldn't support any such development.

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