6/21/07 NOW: NE SD KS IA MN MO

[Nick Hartley]

This might be a little early to start this but parts of north central South Dakota are experiencing a possible tornado in the Gettysburg area. Looks like it's going to be a long day. Supposedly a shear of 120 mph with this storm. I apologize if this is a little early.

 

[kenny_allen]

Onida, SD Storm

The SevereStudios.com Chase Team is north of Wessington now, heading to Highmore, SD to intercept this storm. We can see the very large supercell to our NW. We will be putting our live StormCam online in about 20 minutes when we intercept the storm.

As Nick said, looks like this could be the start of an active chase day.

 

[kenny_allen]

South of Highmore, SD. Large shelf cloud. Some of you saw it on our ChaseCam. Keloland TV took it live.

Very strong winds, amazing structure with this shelf cloud. No hail yet.

 

[kenny_allen]

Tornado warning

We have had some rotation in this storm near Highmore. Some lowerings. Talked to ABR NWS. They are issuing Tornado Warning.

TORNADO WARNING
NATIONAL WEATHER SERVICE ABERDEEN SD
919 AM CDT THU JUN 21 2007

* TORNADO WARNING FOR...
EASTERN BUFFALO COUNTY IN CENTRAL SOUTH DAKOTA...
SOUTHWESTERN HAND COUNTY IN CENTRAL SOUTH DAKOTA...
SOUTHEASTERN HYDE COUNTY IN CENTRAL SOUTH DAKOTA...

* UNTIL 945 AM CDT

 

[kenny_allen]

New Tornado warning. We have the ChaseCam up and we are underneath the storm. We have had a few funnels come up and down. Some minor rotation. Very strong supercell continues to move SE.

941 AM CDT THU JUN 21 2007

THE NATIONAL WEATHER SERVICE IN ABERDEEN HAS ISSUED A

* TORNADO WARNING FOR...
BUFFALO COUNTY IN CENTRAL SOUTH DAKOTA...

 

[Mike Hollingshead]

LOL!!! What the hell kind of road are you on? Best of luck with that. Glad the two massive heard of cattle finally moved(at least that I saw, as I just turned it on to see the first one). I was going to say you should sample the core of that thing. Now I'm wondering if you soon won't have any other chioce, lol. Oh boy more cows. Someone send a rescue team now.

 

[Dustin Wilcox]

In Freeman SD, have a nice updraft going up here and then a couple more off to my NW. Still debating if I want to make the hour trip West to intercept the big storm or give these a chance first.

 

[CraigFisher]

Nice tight rotation on base velocity of cell on the Brule /Aurora County lines just North of I90

 

[kenny_allen]

Golf ball size hail bouncing off the chase car right now. 1.5"-3.0" hail. Punching the core is not fun Mike! The cows really did slow us down though.

Trying to get to White Lake, SD.

 

[MatthewCarman]

SPC upgraded the outlook to a MOD risk with a 5% chance of a tornado across Iowa.

Cells in SD have been looking inpressive all morning. Someone said that one cell had Softball sized hail and for being this early that is inpressive.

Has there been any confirmed tornadoes yet this morning?

 

[MatthewCarman]

That storm by Alcester is inpressive. Hail up to 2" is possible and this storm has had several meso's with it. DBZ is at 61 with a VIL of 58 and tops are at 51 kft. Storm is inpressive on GRlevel3.

EDIT: Cell moving into Iowa and Soiux,Plymouth and Union Counties are now severe warned.

 

[Chad Cowan]

Cu field developing in Central NE near Thedford, oriented in NE/SW line, evident on visible sat imagery. 90deg surface temps nosing into the area with mid-upper 60tds, but the cap seems to be quite strong though with 16C 700mb temps. 4000 j/kg SBCAPE and 3000 j/kg MLCAPE, if anything does break the cap development will be explosive.

 

[Craig Maire II]

Now

Few storms rapidly developing ahead of large area of "garbage" in north central Iowa, 2 warnings in effect.

 

[MatthewCarman]

Cu field developing in Central NE near Thedford, oriented in NE/SW line, evident on visible sat imagery. 90deg surface temps nosing into the area with mid-upper 60tds, but the cap seems to be quite strong though with 16C 700mb temps. 4000 j/kg SBCAPE and 3000 j/kg MLCAPE, if anything does break the cap development will be explosive.

SPC has a new MD out and they dont realy say anything that screams severe weather in NE. I think this event will be east of NE/KS today. SPC says weaker shear and moderate instability in your area. You may want to drive into Iowa where there is no cap being reported and things are getting active. I could be wrong but NE to me does not look good for much besides some hail or damaging winds if anything.

Currently a nice cell in northern Iowa capable of Qaurter size hail and destructive 70 MPH winds.

 

[Chad Cowan]

SPC has a new MD out and they dont realy say anything that screams severe weather in NE. I think this event will be east of NE/KS today. SPC says only weak shear and moderate instability in your area. You may want to drive into Iowa where there is no cap being reported and things are getting active. I could be wrong but NE to me does not look good for much besides some hail or damaging winds if anything.

"...GIVEN MODERATE INSTABILITY AND STRONG DEEP LAYER SHEAR OVER SRN SD/NRN NEB...POTENTIAL WILL EXIST FOR ADDITIONAL TSTM DEVELOPMENT AND ATTENDANT SEVERE THREAT..." (SPC MD 1238)

I'm not chasing today. Although there 'is no cap being reported' in IA, the tornado threat will be decreasing as the discrete cells congeal into an MCS.