AFTERNOON1

COLD FRONT CONVECTION
. . . Convection intensified quickly in the region of maximum surface moisture convergence in northeast Kansas and northwest Missouri along the cold front, near the outflow boundary. A short-lived small tornado was reported by the Highland Kansas police department (extreme northeast Kansas) at 2035 UTC.
. . . By early afternoon the outflow boundary had nearly disappeared on the visible satellite imagery. The arc cloud line dissipated as the lower-levels of the rain-stabilized region heated and mixed. Surface observations indicated southerly flow on both sides of the boundary, and there was no convergence evident on Doppler radar at this time. However, it is interesting to note that the hourly surface data continued to find a strong gradient of theta-e, and strong moisture convergence in the vicinity of the boundary.

. . . Actually, the only evidence of the boundary on satellite imagery by mid-afternoon was an area of developing cumulus cloud streets (S) south of the arc cloud line's last identifiable location, and patches of stable, strato-cumulus clouds within a mostly clear area to the north through northeast. A few deeper congestus (C) were developing near the western end of the unstable cumulus field, within the transition zone. This congestus quickly developed into new thunderstorms, as can be seen in this animated sequence.