Hail in Knox County, Nebraska

Emergency management report of hail measured up to 1 inch in diameter. Time estimated from radar.

Early on July 28, 2025, a mesoscale convective system (MCS) tracking south across Iowa triggered a brief period of damaging winds in extreme eastern Nebraska and southwestern Iowa. An outflow boundary from the MCS pushed into the region, producing a 58 mph gust at 1:45 AM CST measured by the ASOS in Tekamah, Nebraska. Later, at 2:21 AM CST, law enforcement reported a roof blown off a home in Mondamin, Iowa. As the morning progressed, radar showed the outflow boundary weakening and becoming more diffuse, leading to no additional severe weather reports.

That evening, another round of storms developed along a cold front stretching from north-central Nebraska into southeastern South Dakota, impacting northeast Nebraska. Although most of the storm activity occurred outside the area, one storm clipped northeast Nebraska, where emergency management reported a measured 1-inch hailstone 4 miles southwest of Niobrara, Nebraska, at 7:23 PM CST.