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6/16/10 DISC: SD

Matthew Crowther

Matthew Crowther

EF4
Joined
Aug 19, 2005
Messages
333
Location
Atlanta, GA
I see now Roger Hill says he saw at a minimum 16 tornadoes with the Dupree storm. Question- did anyone call the RAP NWS with these reports? Their LSR only lists 2. This cell sounds amazing- My one day record is 12 tornadoes on June 12, 2005 and May 3, 1999- and that was from several different cells each time. 16 from one storm? 4 at once? I would give my left you-know-what to have been on this storm.
 
Matt,

I have seen just a few images from the private area of the Silverlinging Tours forum posted by Roger Hill before he went to bed.

These images (and similar) will become public domain in the morning I am sure.

Suffice to say - What a storm and what photogenic tornadoes from this beast

This, IMO was the storm of the year chase wise.
 
Stuart Robinson said:
Matt,

I have seen just a few images from the private area of the Silverlinging Tours forum posted by Roger Hill before he went to bed.

These images (and similar) will become public domain in the morning I am sure.

Suffice to say - What a storm and what photogenic tornadoes from this beast

This, IMO was the storm of the year chase wise.
Click to expand...

Or that nw KS beast on June 11th that no one was on lol. That thing didn't move for 2-3 hours and probably had a better radar representation than this one.

As for numbers, if it did 16 it did them in about 1 hour fwiw. To count those it seems you'd need a dedicated person(or two) to get a good grip on what happened. TWC has Roger's video now, so one can get an idea how it was producing several at once, but often those were in a clustered location almost multivortex'ish.
 
Perhaps lack of reports was for the fact it was already tornado warned the whole time and a couple cops were sitting there watching it not move anywhere.

I wonder how they handled their sirens, if those things aren't supposed to run long. I could hear them going for quite a long time. They had to be under a tornado warning over an hour straight. I imagine the cops were telling them when to sound them. For a long time all that seemed to be on it were myself, Bob Schafer(I hope you got east) and a couple tours.
 
Kory Hartman said:
Actually, I was in the NWSChat, and the SN reports were NOT getting injected into the flow there
Click to expand...

Do you have them set on ignore? I wasn't in the RAP room so can't say for certain they were there - but I did see them in other rooms so know the system was working. If there's an issue with SN & RAP, it can be investigated.
 
Stuart Robinson said:
Matt,

I have seen just a few images from the private area of the Silverlinging Tours forum posted by Roger Hill before he went to bed.

These images (and similar) will become public domain in the morning I am sure.

Suffice to say - What a storm and what photogenic tornadoes from this beast

This, IMO was the storm of the year chase wise.
Click to expand...

http://www.silverliningtours.com/Home/tabid/36/Default.aspx

Some of Roger's photos are posted on the Silver Lining Tours homepage. WOW!

http://www.weather.com/outlook/videos/captured-multiple-tornadoes-17581#17575
 
Last edited by a moderator:
Unfortunately I missed all these tornadoes in SD yesterday. Yet another massive storm missed! What are you gonna do right? I can't afford to go on the really long chases right now. Stayed in Nebraska and got some nice structure on several LP cells, as well as a gorgeous adventure through the Crescent Lake Wildlife Refuge at sunset.

There have been several cells this year that have just sat in one spot going completely bonkers. 6/16 SD (16 tornadoes), 6/11 KS (7 tornadoes, I think), and the one I saw in Wyoming on 5/18 (13-14 tornadoes) to name a few. Basically I'm wondering what the heck is up with that? What causes these cells to develop into essentially stationary tornado factories?
 
Zach Young said:
There have been several cells this year that have just sat in one spot going completely bonkers. 6/16 SD (16 tornadoes), 6/11 KS (7 tornadoes, I think), and the one I saw in Wyoming on 5/18 (13-14 tornadoes) to name a few. Basically I'm wondering what the heck is up with that? What causes these cells to develop into essentially stationary tornado factories?
Click to expand...

Either an outflow boundary, warm/stationary front, and/or extreme instability. I wasn't following what was going on yesterday, but I'll bet money that it was one of those factors.
 
Matt, I can count at least 13 that I personally saw. If a tube drops, touches down and goes back up, I would could count that as one. If another drops one minute later, touches down, etc, then I count that as number 2. Would you not agree? The storm motion was insane. It was completely anchored and just spinning out tube after tube. You really had to be there and see it with your own eyes to believe it. Andy Gabrielson said he saw 11 but I believe he wasn't quite in position to see the first three measly ones before the big ones touched down (but I can't be sure of this of course ). We headed west for a short time on 212 early on and did see a rain wrapped elephant trunk but it was barely visible.

So that brings the count to 15. I was in and out of he van due to the hail, rain and heavy cg action in our immediate area, so I'm sure I missed at least one. I have a photo of three separate tornadoes at once. This was not a multi vortex. You would need to see the video to confirm this for yourself. but without a doubt, it was a lifetime chase day for me. I'll post photos when I get home.
 
Andrew Ryan said:
Either an outflow boundary, warm/stationary front, and/or extreme instability. I wasn't following what was going on yesterday, but I'll bet money that it was one of those factors.
Click to expand...

I believe it was a warm front and the instability was rather strong, but it's not really the number of tornadoes that I'm asking about. It's that these storms don't move while they're churning them out. Was it the weaker mid-level winds that failed to push the storm along? Was the SR inflow and speed of the storms perfectly balanced such that the storm was constantly redeveloping into the inflow or otherwise propagating upstream? I wonder if the instability and LL shear had been somewhat lower these tornado factories would have been non-tornadic upstream propagating storms (flash flood cases)...

Perhaps if I had some other "sit-and-spin" storms to compare these to it would help. Anyone have other examples? I mean nearly stationary, not just slowly moving.
 
Yes. The wind field was really weak yesterday. That helped to keep the storm anchored on the boundary. Also, once the storm was rooted in the boundary layer, that allowed the storm to slow down even more. Looking at the radar loop, you can see the storm "flying" (relatively) to the North and then come to an almost complete halt once it becomes surface based. Pretty cool to watch it sit there and cycle over and over again.

The SR inflow has nothing to do with the storms movement. The movement is based on the flow in the upper part of the storm.

The Grand Island storm in 1980 (?) is probably a great example. It did a very similar thing but I don't know how much info you can get on that.
http://www.stormtrack.org/forum/showthread.php?t=20344
 
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