A small-scale bow echo tracked southward out of Nebraska into North Central Kansas on this Wednesday evening. This bow echo, which evolved from a supercell, produced a long swath of significant severe weather over South Central Nebraska. This storm tracked across Jewell County between 8:30 p.m. and 9:45 p.m. CDT and was in the process of weakening. However, one final report of severe weather occurred in the town of Randall, where strong winds downed large tree limbs which resulted in some minor damage to one home.
This storm originally developed in an upslope flow regime, north of a quasi-stationary front, with high pressure over the Midwest. The front extended from northwest to southeast across Nebraska and bisected South Central Nebraska, separating temperatures in the 80s to near 90 from rain cooled air in the 60s and 70s during the late afternoon hours. Aloft, subtropical high pressure was over New Mexico, with a low amplitude ridge over the Rockies and a trough over the eastern United States. These storms formed on the eastern fringe of the instability gradient. Poor mid-level lapse rates, and cool surface temperatures, resulting in innocuous MLCAPE of 500 to 1500 J/kg. Deep layer shear was between 40 and 50 knots.