4/20/04 NOW: S KS /E OK

[Mickey Ptak]

Dryline slowly pushing through Central OK now.

[Larry J. Kosch]

Time to go Storming!!

A line of storms are firing up in KS and moving NE towards Missouri.
Here's a NWS link while its still in KS:
http://www.crh.noaa.gov/radar/loop/DS.p19r...0/si.ktwx.shtml (http://www.crh.noaa.gov/radar/loop/DS.p19r0/si.ktwx.shtml)

A tornado watch has been set up for KS, OK and parts of Missouri.

Happy Chasing!! 8) LJK.

[Austin Ivey]

If I wasn't stuck behind a computer today; I'd be between Tulsa and Stillwater soon! Decent discrete cell near the KS/OK border at I35 now.

[J.B. Dixon]

A good looking cell gaining strength in the vicinity of Arkansas City, KS, just along the border, and another one formong SE of Ponca City right now. They will only get more intense moving into thepool at the DL/outflow intersection. I'm getting drool on my shirt thinking about being there!!

Further north, along the front, some cells are just now popping in W.C. IA, near Atlantic, and also between Norfolk, NE, and Sioux City. Expecting a WW for this northern area soon, I would guess. Not as much forcing on these northern storms, so maybe just a SVR watch??

[Jason Montano]

Well I am in Bville at the moment, watching that cell along I35, on radar, hope I made the right choice. The dryslot appears to be nearing me here, the temps are rising just to my west reaching 76. It is 71 hear but I think once the temp rises 4 deg convection should begin.....I hope.

[Wayne Miller]

That cell along KS/OK border near I35 was quite explosive in development per view of radar loops...looks impressive. Wish I were there.

[J.B. Dixon]

Look for that Kay Co. OK SUP to go TOR warned at any time. Looking at the mean velocities, it's spinning like mad. Someone a lot smarter than myself can answer better, but with the environment these are heading into, can they stay together without going linear for another 2+ hours or so??

[Jeff Snyder]

Originally posted by J.B. Dixon
Look for that Kay Co. OK SUP to go TOR warned at any time. Looking at the mean velocities, it's spinning like mad. Someone a lot smarter than myself can answer better, but with the environment these are heading into, can they stay together without going linear for another 2+ hours or so??

Really? I haven't seen much rotation with it... at least not on SRM images... And now I see OUN has cancelled the svr warning for it as the cell is disappating rapidly...

That being said, there is rapid intiation now from southeast of that stom, down into the northern burbs of OKC. I would head out, but I'm not impressed with the low-level shear... and with an exam tomorrow, I think I'll stay off this event...

[Tim Vasquez]

VILs are awfully weak... the Pawhuska storms are only at 25, and stuff down near OKC (though new) is barely reaching 5.

Tim

[Mike Peregrine]

Satellite is indicating overshooting tops on the tail end charlie in Kansas and the dueling banjo storms over NE Oklahoma. The OK cells have the advantage of isolation ahead of the line ... they can throw one out at any time. The northern cell (just south of KS state line) appears to be turning right and some slight rotation is showing up on rad. vel. Congrats to those of you who picked NE Oklahoma.

... for them to stay isolated, they are going to have to stay out ahead on their own and maintain access to the juice apart from the linear stuff to the north and without too much further flank development ... they may even be able to do it on into MO/AR ... will have to wait and see what happens, I guess.

HMMM - looks a lot like Sunday to me! ... :)

[Stuart Robinson]

Right off target area for this thread but....

* TORNADO WARNING FOR...
LA SALLE COUNTY IN NORTH CENTRAL ILLINOIS


* UNTIL 615 PM CDT


* AT 532 PM CDT...A TRAINED SPOTTER REPORTED A LARGE TORNADO 7 MILES
NORTHWEST OF HENRY...MOVING NORTHEAST AT 35 MPH.

[Jeff Snyder]

The kidney bean shaped cell near Pawhuska has some very nice rotation to it, even on tilt 1, and on Radial velocity and storm-relative rad velocity. VILS near 60 with it too. VAD profile from Tulsa radar shows nicely backing flow, which would definately aid in increasing low-level shear.

[Larry J. Kosch]

That line of storms has extended itself into OK now. Here's a link to NWS radar out of Okie City (Norman) OK:
http://www.crh.noaa.gov/radar/loop/DS.p37c...r/si.ktlx.shtml (http://www.crh.noaa.gov/radar/loop/DS.p37cr/si.ktlx.shtml)

I would like to know if anybody can interpret the ground clutter around the radar site. Does it looks like a couple of convergence zones and a outflow boundary in the area?? Is that whats feeding the storm clouds to the NE??
Would be interesting to see what interaction takes place when the outflow boundary reaches one or both of the convergence lines... 8) LJK.

[Jeff Snyder]

I'm seeing some decent anticyclonic rotation with the cell southwest of Tulsa...

http://www.tornadocentral.com/now/anticyclonicwtulsa.jpg

It seems to be actual rotation given orientation of max velocities relative to a radial. However, it's also immediately underneath an apparent hook... Hmm... There is some inbound/outbound on a dissecting radial, which tells me there is some convergence here too. However, max velocties are located on the sides of radial, indicating rotation...

[Wayne Miller]

Larry Kosch wrote: I would like to know if anybody can interpret the ground clutter around the radar site. Does it looks like a couple of convergence zones and a outflow boundary in the area?? Is that whats feeding the storm clouds to the NE??
Would be interesting to see what interaction takes place when the outflow boundary reaches one or both of the convergence lines..
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I believe what is seen on radar incude the cool front moving in from the northwest and convergence along the dryling near OKC and southward.

[Lance Maxwell]

Ya, I definitely see rotation there with that cell. I just got off the phone with Jason Montano who is en route heading through the North side of Tulsa as we speak.

[Larry J. Kosch]

Wayne,

Thanks for your feedback. Its really easy to confuse the frontal boundary with the outflow boundary. Someone else mentioned a anticyclonic rotation in this thread. Check out the link to NWS radar for Omaha:
http://www.crh.noaa.gov/radar/loop/DS.p19r...0/si.koax.shtml (http://www.crh.noaa.gov/radar/loop/DS.p19r0/si.koax.shtml)

This huge supercell is unusual in that the overshooting top is actually backshooting north while its moving SE. Also, a couple of tornado warnings were issued for this cell. I was able to observe a reverse hook on the south side of the cell as it moves SE. Looks like its on a possible track towards Omaha. Lets hope Mrobinson see this and get pics of this storm coming in!!

Happy Storm Hunting in KS MO and OK!! 8) LJK.

[Lance Maxwell]

Just got off the phone with Jason Montano who is in Sapulpa.......a tornado has been spotted on the ground by another spotter but Jason is having trouble seeing it.

[Shane Adams]

The storm near Stroud is showing signs of rapid intensification. We were stuck there all damn afternoon after the new motor in my chase partner's truck died. So after baking in the sun all afternoon under hot humid skies, I'm now home (just got back 30 minutes ago via truck/trailer hauler) watching a storm intensify exactly where we were, to the mile.

[Tim Vasquez]

This has been the track of the strong couplet (70-80 kt gate-to-gate) through Sapulpa so far (manually figured by me)... the track extrapolates into south Tulsa. This frame was at 7:20 pm (updated 7:28 pm).

http://www.stormtrack.org/tultorn.gif

[Lance Maxwell]

Ya Tim, very nice graphic.....I am impressed. This thing is really looking good on radar and Shane is right, the cell to its SW is looking very similar to this one....I would not be surprised to see it tornado here within the next 30 mins.

[Tim Vasquez]

Wonder what's up with the storm movement data feeding the INX storm relative motions... whatever values they're using really suck. Base velocity seems to be working out better.

Tim

[Robert Dewey]

Here is some level 2 from the 0047z scans...

Tilt 0.5: http://www.waveformpc.com/kinx0.gif
Radial Velocity: http://www.waveformpc.com/kinx_vr.gif

EDIT: Looks like a nice radar hail spike on the southern cell, probably some huge stones falling...

Robert

[Jeff Snyder]

Awesome hook on the south-Tulsa storm. Very nice couplet also on the Craig county storm! New watch out mentions hail to 4"! Time to pull the car in the garage!

[Tim Vasquez]

KTUL TV broke a story on the tornado: http://www.ktul.com/news/stories/0404/141007.html No deaths or injuries reported.

Tim

[Aaron Kennedy]

Not quite now, but it was only an hour or two ago: Tulsa Supercells

http://ww2.convectionconnection.com:8080/STORM-042004/

Didn't have time to chase (studies!)

Aaron

[George Flickinger]

Another storm later produced a brief tornado touchdown in NE Broken Arrow, OK. KOKI Fox 23 had two storm chasers on the storm, and showed video from two different views of a quick touch-down near the Broken Arrow expressway and 71st.