Damaging winds occurred from a downburst in parts of Webster county on this Friday, along with low-end severe hail. During the afternoon, scattered showers and thunderstorms were persistent along Highway 136, in south central Nebraska. Just after 400 PM CST, a thunderstorm over eastern Franklin county moved into Webster county, intensified, and became severe as it crossed the southern half of the county. Severe winds blew round bails of hay onto a county road west of Red Cloud. Round bails weigh a minimum of 500 pounds and, depending on density and moisture content, can way 1000 pounds or more. As the storm moved through Red Cloud, it blew down several large trees and damaged power poles which resulted in power outages. Hail up to one inch in diameter and minor street flooding were also reported.
A very slow-moving cold front was sagging across south central Nebraska, and it was near the Kansas state line around the time of this thunderstorm. In the upper-levels, weak west-southwest flow was over the northern U.S., with a low-amplitude ridge from Denver to Omaha. Just prior to this thunderstorm, temperatures were around 80, with dewpoints around 70. With the mid-level lapse rate between 7.0 and 7.5 deg C/km, MLCAPE was between 1000 and 2000 J/kg. This storm occurred within the instability gradient on southwest fringe of rain-cooled outflow from thunderstorms the previous night. Deep layer shear was around 20 kt.