Three tornado-warned storms and no tornadoes! Come on! Well, even with the lack of tornadoes, this was still a very good chase. I mostly chased in the NE Oklahoma region. Storms had already fired off the dryline by the time I left work. First, I chased the tornado-warned storm near Pawhuska. I dropped it after it fell apart north of Bartlesville. I got on another tornado-warned storm behind it, and chased that one to Coffeyville, Kansas. Then I went south to the Nowata, OK storm and apparently just missed a brief tornado by a few minutes. Unfortunately, I didn't see the Tulsa tornado. It wasn't until later that I saw a visual satellite loop of the region where I noticed that some storm outflow from southern storms in OK had reinforced the Tulsa storm causing it to produce the tornado. Outflow boundaries can make the difference.