May 13, 2009 Bronson, KS
Due to work obligations, I was limited to a fairly close radius around KC. Met up with Scott Blair in Ottawa, KS with a target along the cold front near I-35 thinking the strong cap would keep convection more isolated farther southwest. Headed west out of Ottawa on I-35, then north on Hwy 75 to intercept the initial cell approaching Olivet. A conical, then blocky wall cloud soon developed as the updraft approached our location. This feature soon became ragged and elongated as new updrafts began to develop on the southwest flank of the original. We dropped south again on 75 then briefly east on Old Hwy 50 to observe some brief broad rotation beneath the new updraft region. While repositioning south towards Burlington, observed walnut sized hail approximately 8 miles north of Burlington. We did noticed tightening cloud base rotation near a newly developing updraft region as we dropped south near New Strawn. This apparently was the feature which later produced the tornado southwest of Harris/Northeast of Burlington. However, we were unable to witness the tornado as precip obscured the area of rotation as we repositioned.
Caught back up with the storm east of Burlington as it made another attempt at more enhanced cloud base rotation. Scud rapidly condensed into the developing wall cloud as mid level banding became more impressive. However, this soon weakened and became ragged as upstream convection seeded the inflow region. Headed east toward Lone Elm while observing another round of walnut to golf ball sized hail. The storm then began to exhibit strengthening SRV (and soon a strong gate to gate couplet) as it propagated southeast toward the Moran/Bronson area. Rapid differential motion became evident along with several long inflow tails along hwy 54 west of Redfield. The storm had become HPish by this time and the area of rotation soon became obscured. Ended the day at sunset near Fulton while being treated to illuminated mammatus on the north side of the precip.
