10/29/04: REPORTS

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Several interesting things to note... Firstly, this storm largely lacked any sort of anvil feature. In fact, the storm looked highly sheared / tilted over, and relatively low-topped given the lack of anvil features.

Glad you reminded me ... intended to mention this as well. Storm tops up here were also noticeably low, with very little in the way of anvil features as the photos show. The Davies Co. storm had the closest thing to an anvil feature that appeared to be pushing back to the west, but still quite a low-topped storm. Wondered if anyone may have glanced at cloud top readings at some point to let us know what was returning on these storms.

Don't have a chase report - but maybe I can address this issue.

There is a good probability that this was caused by a sharp inversion at midlevels that acted to limit the storm tops, or at least slow the updraft down enough that the tops essentially where blown downwind by the strong winds at midlevels. Take a look at the soundings from last night - say from TOP or OMA - and you'll see what I'm talking about. In case you are wondering, the sharp inversion is caused by strong subsidence owing to the cold air advection (CAA) below this level. If you looked at the obs/model guidance yesterday, you'll note that a cold front aloft advanced out ahead of the surface boundary - which weakened (erased in some cases leading to a deep dry adiabatic layer) the cap allowing storms to develop, but also would have led to subsidence and the mid-level inversion noted in the soundings.

Glen

Yes I think you 're right; if you see this sounding:

[Broken External Image]:http://weather.uwyo.edu/upperair/images/2004103000.72558.skewt.gif

You can see a strong inversion at nearly 500mb; the equilibrium level infact is at 540mb...Probably tho only form of strong convection that could develop was minisupercell. Then a good presence of cape in the 0-3km layer can have helped the convection.
 
I was certain something would pop in western Illinois, and would likely go supercellular...and boy did it ever...Rather than drive to Iowa for an instant squall line...I played the area I had harped all week and lucked out.



http://www.geocities.com/ilxwx/29oct2004.htm

EDIT: This was the storm I saw mentioned a couple times in the NOW section from yesterday that had a tor warning issued on it for Ford, Livingston Counties...also saw someone else mention the large hook on it.[Broken External Image]:http://www.geocities.com/ilxwx/10290404.jpg
 
Very awesome photos, Mike! Unfortunately I wasn't able to go out and do any spotting cause of other plans... but oh well.

Thanks! - - - and thank you Andrea and Glen for the well thought-out explanation. Mini-supercells can make for some interesting discussion. Something that amazes me about events like yesterday are the insane speeds that can be reached by these storms. Within two hours after seeing those, I had just enough time to get home and upload the web page and then take a look at satellite to see the storms crossing over into Illinois! ... That's all it took to cross the entire state. No way to keep up with something like that - - - it was still worth it to see the cumulus glowing from the sunset - it almost looked like they were generating their own light ... just one of those rare times that what started off seeming like a dud chase ended up being really beautiful and satisfying.
 
Is it my inexperienced eye playing tricks on me or is that a funnel just above and to the left of the highway sign?

It looks interesting to me also. Any other pictures of this or maybe an enlargement?

Reported tree damage, rotation and a pic of a possible funnel! :wink: HMMM

Try these, quality not very good. The camera didn't focus in completly due to rain on windshield

5:58 pm
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I headed to NE OK to see what would fire up there. Ended up near Miami, OK. Things started to build and they were going linear quick, so I decided to blast back south and try to see something out of the TOR warned storm down there. I got there just as it was starting to fall apart. But I did see some decent storm structure and was treated to a nice sunset.

Here's a picture of the storm when it was just south of Muskogee:

[Broken External Image]:http://www.visibleimagery.com/forumimages/20041029_storm.jpg
 
LOL JR, is the last picture in your post taken at W. 93rd Street northeast of Oktaha? That bridge looks identical to the bridge that we missed before we ran into Dave Crowley. FWIW, we saw you again on I40 heading west after the chase, but I'm interested to see where you took that picture from...

My map show it at E0970 and N4260 crossing Butler Creek, northeast of Oktaha. I'm sure it was the same bridge. I thought I was in the middle of nowhere, obviously I had company. I passed Jeff Piotrowski on one of those dirt roads as well.
 
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