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6/16/09: NOW: ND/SD/KS/OK/IL/IN/MO/TN

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Location
Mt Prospect, IL
Cold core-esque supercell outbreak in the dakotas around the upper low. Several tornadoes have been reported and a tornado watch is in progress. Anyone on these small cells?
 
Have been watching this all afternoon. Super slow moving cells that probably rain-wrapped. Some decent returns on radar. Things are clearing here and I am considering going out to see what's happening to the west after work in 45 minutes.
 
Things are getting serious in SD it sounds like:
AT 355 PM...TRAINED SPOTTERS REPORTED A LARGE WEDGE TORNADO ON THE
GROUND ABOUT 12 MILES SOUTH...SOUTHWEST OF WESSINGTON.
And... here is a stream from south of Wessington from KELO: http://bit.ly/16E4kf
 
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Mark Sefried is on the cell west of Mitchell, reporting a rotating wall cloud with good vertical motion. Nice beaver tail as well.

EDIT: Now reporting a tornado with the storm.
 
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mods: if you could add Tennessee to this discussion please.

My class let out early due to a tornado warning in Rutherford County (Murfreesboro, TN), so I went by the house grabbed my gear and headed east on I-24 near Christiana, and then cut east over to Woodbury and south down to McMinnville. Following the storm was difficult as torrential rain, dangerous cloud to ground lighting, and heavy winds inhibited my chase.

This HP storm had previously spawned a funnel up in Smyrna (to the north of Murfreesboro), and the storm still had notable rotation, with penny size hail, and 60-70 mph straight line winds, but upon reaching McMinnville, lost intensity and fell apart. Abandoned the chase and called it a day.
 
tomorrow and thursday look pretty good. southeast NE to northeast KS look primed, say beatrice to topeka or just north around holton. 500 flow near 40kts out of the west with back 850s in the area near 20kts so shear is pretty good. GFS has higher dews then the WRF but they should be able to get to the near mid 60's with a good theta-e axis right into the area with MLCAPE values possibly up near 4000 or better. both models are breaking out precip at 0z, GFS is farther north into southeast NE and WRF has precip in northeast KS.

Its to far for me to chase tomorrow but I will hopefully be chasing somewhere closer on thursday. for tomorrow, I would probably play somewhere west of nebraska city right on the border. I would guess tomorrow will be a moderate at some point in the day. really looks good for some tornadoes, maybe one or two sig tors.
 
what an amazing supercell that is still ongoing in southeast s. dakota!! i havent been able to follow it continually, but i believe this is the same supercell that was producing tornadoes up in n. central south dakota back around noon today. that's 8 hours!! it has produced several confirmed tornadoes along its track along with baseball sized hail. its now still warned with a nice look to it for areas just northeast of yankton, sd!
 
New report at 7:41PM of a wedge tornado on the ground via SN in SD near Menno.
KELO-TV Live

EDIT 8:08pm - showing damage at the above link
 
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Kory Hartman has an interesting cloud feature, that could be a tornado, on his live cam north of Yankton. Can't tell what it is though.

Edit: Tornado 9 miles NNE of Yankton
 
Storm southwest of Winfield continues to show rotation and tornadic potential. Looks to be right on the Cowley/Sumner county line moving like a tortoise.
 
That storm near Winfield is looking nice, has that classic flying eagle shape to it. Level II radar showing a hook there on the SW end.
 
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