The first wall cloud we saw produced a brief weak tornado near Greenfield, Oklahoma that we only were able to capture on video. I start off with the most spectacular sight of storm structure I have witnessed. It is the "drier hose" I talked about above wrapping around the meso. We soon caught up to the storm getting closer to the main updraft base very near to the same feature. The wall cloud in the next pic is the second rotating wall cloud we saw that day. We watched it from it's infancy through tornadogenesis and dissipation. It was really cool to watch the entire process from beginning to end. Blair got some great zoomed-in video shots showing the rotation up close. It is interesting to note that while the storm was moving east, the wall cloud and tornado developed and moved slowly north on the west and northwest side of the storm.  It was obvious that the rotation  was being stretched northward from the storm's outflow. As it moved further away, the rotation increased accordingly to the point of producing a tornado. Some may argue that it is technically a landspout; however, the rotation originated with the meso updraft and persisted until the tornado died.  I call it a tornado. You be the judge.
 
These are the best pictures out of the 100 that I took. You may notice some slight color variations due scanning and/or different film. I can assure you that these are the real McCoy and not electronically faked. 

 
Tornado about 3 miles NW of Guthrie. Notice the debris cloud between the trees. Just another bit of good luck we had this day. (Somehow, the scanner only duped this in B/W.  I'll endeavor to get this redone in color.)
 
 
Alas, our wonderful little tornado has finally begun roping out. We would follow another bulging wall cloud  with good rotation further east until it died just past I-35 east of Guthrie. We quickly turned our attention to the SW on another supercell approaching OKC.
 

  Just as we got clear of the precipitation shaft, we saw the huge meso as it approaches Yukon just west of Oklahoma City.  We are near the 35/44 split by Remington Park looking west.

  The meso is gaining more strength and growing as it begins to striate and take on a 'mothership' type appearance.  It was quite evident at this time of the entire storm structure slowly rotating. It is approaching the Lake Hefner area.  At about this time that I start thinking of a large violent tornado forming over OKC....not a very pleasant thought.

  Now becoming beautifully striated and layered while also becoming more sinister as it bears down on NW OKC. The rotation was incredible. Although you cannot see the condensation funnel due to drier air, the tornadic circulation is in progress producing damage. This definitely looks like a scene out of Independence Day with a spaceship hovering over the city. I was expecting a swarm of F-16's to attack it at anytime.

  The back edge of the meso is just about overhead. Words and pictures cannot describe nor capture the sensation of this moment...it was very surreal...a religious experience to say the least. The 'stacked plates' appearance is quite evident here and the rotation was mesmerizing. We could clearly see the black boiling mass of the underside of the meso.

  We have now moved south abit for safety's sake as a couple of funnels were trying to form on the outer periphery of the meso. The RFD had really intensified punching into the main rotation. The result was a very rapid lowering and organizing of the wall cloud which quickly produced this funnel/tornado. It is bearing down on Frontier City. I was very apprehensive at this point of people taking shelter. The only good thing about this tornado is that it had waited until it had passed out of the densely populated areas of OKC. We are now looking NNW.

  The tornado just seconds after hitting the Frontier City area.

  Although no connecting condensation cloud was evident, as most of the tornadoes this day, it is still producing F1 to F2 damage in a sparsely populated residential area around Arcadia Lake.

  We thought it best to pursue along Hwy 62 east out of OKC paralleling the tornado and meso in case it were to redevelop a little to the SE.  Plus, we expected the main highways and roads further north were clogged by traffic and possible debris. The entire wall cloud is quite large at this point and nearly on the ground. It was picking up forward speed and keeping up with it was difficult. The hill hid most of the tornado (dang it) ...just one of the pitfalls of chasing in the city although the red lights weren't too bad.

  The tornado strengthens again slightly taking on the classic funnel shape. More strong F2 damage to some houses. Again, the trees are in the way. We kept trying to go north but could never get in front of it enough to do so. Shortly after this picture, it became more disorganized as well as the contrast became very low. We started turning our attention to the SW for yet another tornadic supercell...#3 for the day.

  A very majestic anvil of supercell #3 approaching Mustang, OK just to the SW of OKC. We tried to pursue this one and get into position, but abit of a bad intercept decision and bad road network cost us valuable time to get into position.

  Our last glimpse of the OKC storm off to the east...a spectacular sunset. Yes, this was the actual color. A very poetic end to an incredible chase day. A total of seven straight hours of chasing.

USA Today has a brief writeup about the events that day that you can view here.

To see an ideal and perfect vertical wind profile for tornadic storms, see the Purcell wind profiler.
 
Some other chasers also tracked the storms as well. These pages offer different angles of the storm. It is interesting to compare as all of our photos were taken nearly at the same moment, but look like a different storm. Check out  Gene Moore's OKC Page and Guthrie Page ; as well as Matt Engelbrecht's Page.  Excellent work!!