Left the Milwaukee metro area about 1:15p with an intial target somewhere between the Quad Cities and Peoria, with the anticipation that the warm front would be further north and convection in MO was going to move across the river into Illinois about 5 pm. I left so late because I wasn't going to chase at all, mostly because I anticipated having to go into MO which wouldn't jive with being back for work today. I made a last minute decision to try my luck in with the north end of this system near the warm front in WC/NW Illinois.
With the help of nowcasting from Mike Johnston, I briefly chased the tornado-warned storm that crossed I-39 near Tonica, Ill. but could only get quick glimpses of the rain wrapped and haze obscured lowering. Mike advised it was rotating and showed a TVS, but I don't believe it ever showed a funnel or produced a tornado.
(Visibility was horrible with ground-based haze, which got worse the farther south I went until finally clearing out after reaching the Springfield Ill. area.)
After the brief sidetrack, I headed further south on I-39 then I-55 into the warm sector south of Peoria. Temps went from ~45* to over 60* rapidly but the closest convection (other than the low topped storms up north) were still churning over central MO. I blasted south to the Springfield metro area to fill up and get some food about 7:15p when I started monitoring reports about the tornadic supercell headed NW into Illinois. I hung around until 8:00p and thought about heading west on I-72 to intercept the storm. In hindsight I think it was a good choice not to, since it was dark and this was not familiar territory for me. The local guys like Skip Talbot were on the storm and could move around a lot better than I, and I don't have mobile WX data yet, so I made the decision to head back north before the storm moved into Springfield.
One interesting note was the lack of information being provided by the NWS or broadcast radio before the storm hit. I couldn't hear WILL radio when the storm hit as I was too far north, but it sounds like they were the only ones on the ball. There was no mention of the severity of the supercell before the storm hit Springfield, just that it crossed the river and was tornadic in MO.
Heading back, I had no idea of the magnitude of the storm once it reached Springfield until I read the other chase forum this morning. Coming back north on I-39, I was literally dodging tornado warned storms in the cold sector. Once I got near Rockford where I was more comfortable with the road network I decided to play the next warned storm. I didn't have to wait long as a cell SW of Rockford was rotating, so I waited for it to move closer but it was very umimpressive looking with no lowering or noticable rotation. I was almost home when the same storm was again tornado warned in far SC Wisconsin. There were no reports of funnels or touchdowns with it this time either, and I couldn't see anything significant. There was ample lighting but nothing to see.
I got back home about 11:30p, with 573 miles traveled. No pics, no video..this was a learning chase more than anything. I will be checking into GR3 or WXWorks, as chasing without them is difficult considering the availability of data.
A quick thanks to Mike Johnston in VA for the nowcasting