After unsuccessfully trying to find a Chick-fil-a on the east side of KC, we headed east on the worst interstate segment in all of the U.S. – Missouri’s I-70. Ugh, I despise this road. Anyway, as Sharon slept and read, I perused data along the drive trying to pick a target in what was shaping up to be a lackluster chase day. I decided to head toward Louisiana, MO (where Sharon’s brother used to live) to cross the Ol’ Miss into Illinois since the area near Pittsfield had the appearance of some moisture pooling and a bit of backing in the surface winds (they were more southerly than all the other stations in MO/IL). We headed east out of Pittsfield on I-72 and finally pulled off the interstate just east of Jacksonville. Convection started to fire north of us and appeared very “showery.” There was an intense multicell that briefly transitioned to a tor-warned supercell as it traversed the areas north of Springfield, but it was moving way too fast to try to chase from our location. Thus, we sat and waited. After about 30 minutes, I noticed on radar that a couple supercells were getting their act together in north-central MO. Hmmm, that looked promising. Then, sure enough, one of the showers to our west near Pittsfield was beginning to show some rotation on radar. I waited just a bit to confirm that this storm was going to organize before we took off after it.
It finally looked good on radar and we blasted back west on I-72. The storm was headed due east along the interstate toward the Illinois River. I had to get off at Oxville exit since the next exit west would’ve put us in the bear’s cage. We routed around the eastern flank of the river valley floor and finally headed up a bluff just east of the “town” of Oxville where we waited for the wall cloud to appear. Slowly, but surely, the wall appeared and it was a heck of a sight. I was really surprised that this storm was looking this good on such a crappy shear day. Heck, whatever … I’ll take it. We continued east on the road that paralleled the interstate, continually stopping to take in the rapid vertical motion on the side of the wall immediately to our northwest. This storm had some of the most vivid vertical motion in the low-levels that I’ve witnessed – a true spectacle by Illinois standards. If we had just a bit more backing in the low-levels I think this thing would’ve “hosed” for quite a while. We jogged east toward Jacksonville, where we decided to head south on the interstate spur in order to stay out of the city. We then allowed the hook to trail us along I-72 for nearly 15 miles until I noticed another supercell had formed immediately behind the one we were on. The second storm was looking a bit better on radar, so I pulled the plug on the first supercell. We headed south of Alexander where we awaited the next hook to come at us. We drove back north and then east out of Alexander when the second supercell’s wall cloud appeared.
One of the many road hazards you will come across while chasing.
Objects in mirror are closer than they appear. Looking north toward wall cloud as it enters Jacksonville.
Wall cloud, looking NW across I-72.
Objects in mirror are closer than they appear. Looking north toward wall cloud as it enters Jacksonville.
Wall cloud, looking NW across I-72.
I included this image to show how electrical this storm was. I was able to catch this bolt driving down the interstate during the day time! Not an easy feat.
Something happened to me as we were driving through a curvy road in “downtown” Alexander. I was getting something out of the back seat as Sharon was driving around a curve, when I suddenly had that … how do you say … “throw up” feeling. For the rest of the night my “equilibrium” was all off and I felt dizzy. I’ve never been car sick and this was a real oddity. My assumption is that it is some sort of inner ear thing that is out of wack … and I’m still a bit dizzy as a type this! A student at NIU, Victor Gensini, said his cousin has had this before after a bad ride at a theme park … apparently it is called “Benign Positional Vertigo”. Well, isn’t that just great … I got BPV instead of SDS!
Anyway, back to the storm. We followed this supercell through the south side of Springfield via the Interstate, but eventually gave up on it due to its storm motion and the lack of good roads east out of the capital city.
After we quit the second supercell, we proceeded to head toward a third supercell that had crossed the Ol’ Miss near Louisiana, MO and was heading toward us. We routed west toward Waverly where we waited for the beast just west of town. Radar indicated that the supercell was in the process of being overtaken by a bow echo. Eventually the hazy evening visibility removed its cover – we saw a large shelf with embedded wall cloud type features to our north, west, and southwest. This thing was moving fast! We were headed back toward Waverly to take cover when I asked Sharon to pull over one last time so I could get a pic as the line neared us. As soon as I looked to my southwest, I noticed a big ball of dust being kicked up. Must be a gustnado along the outflow was my first thought. Nope! This thing was going to town, sucking up lots of Illinois mud and tossing it. I’m convinced that this was a leading-line type tornado that was created by the bottom-up process; not the usual top-down process. In fact, this was likely the most unique tornadogenesis I’ve ever witnessed. What a cool phenomenon to see! Anyway, this thing was a bit too close for comfort and we blasted east into town where we took shelter in a car wash bay (I was more concerned about the hail and winds in the core than the tornado that was headed south of town). The tornado was still apparent as we got to town. We waited out the core of the storm in the bay and finally, as things calmed a bit (and I do mean a small bit), we headed south out of town to look for damage. Sure enough, we found sheet metal thrown across a farm field just south of Waverly. East of the farmfield we found tree damage. The tornado was rated EF-1 and had a path length of 5.6 miles. The NWS's damage survey is provided at this link.
Shelf cloud with embedded wall clouds. "Kink" to the left-center contains the incipient tornado rotation.
Same as previous, just a slightly closer view of the uniqueness of this "wall cloud - shelf cloud" thing. Incipient tornado just to the left of farm.
Tornado continues to our south ... destroying a shed and barn. At this point, we are in the car wash bay. We lost visibility in about 10 seconds as the core of the storm moved over.
After quickly surveying the damage, we then traversed the rural areas northeast of Waverly in a blinding rain, small hail, and lots and lots and lots of concentrated atmospheric electricity. Many of the fields were covered in water, while, in some cases, the roads were completely covered as well. We finally busted out of the storm just south of Springfield where called it a night, booked a hotel room, and ate dinner at Longhorn’s. That was a mighty good dinner after the crap we’ve been eating the last couple weeks.
What a day! A lot more than I was expecting. This day has given me a new appreciation for veered wind setups. I hope to update this entry later when I can examine archived level 2 radar data of the event … this one should be an interesting case to study! I have included a couple images below to illustrate our position in relation to the storm/circulation.