Thunderstorm Wind — Fremont, Iowa

2025-08-10 · near Riverton, Fremont, Iowa

Event narrative

A swath of damaging winds moved through Fremont County, Iowa, during the morning of August 10th, 2025. The event produced widespread damage, primarily characterized by high-end estimated straight-line wind gusts between 90 and 95 miles per hour across the county, confirmed by emergency management.

The most significant damage occurred near Farragut and Riverton. Wind gusts estimated at 95 miles per hour 3 miles south-southeast of Farragut caused significant roof and wall damage to a large barn and completely destroyed a shed. Additionally, winds estimated at 90 miles per hour were responsible for extensive tree damage in both the towns of Riverton and Farragut.

Wider weather episode

A powerful line of thunderstorms, bringing with it a broad swath of damaging winds, swept across eastern Nebraska and western Iowa on the morning of August 10, 2025. This episode of severe weather was responsible for numerous reports of wind gusts exceeding 60 mph, significant structural damage, and tragically, one fatality. The thunderstorms developed as a powerful low-pressure system moved across the northern Great Plains, with a front extending through eastern Nebraska and into Kansas. A steady low-level jet, a narrow band of strong winds just above the ground, transported a large amount of moisture into the area. This influx of moisture, combined with very unstable atmospheric conditions, created a high potential for severe weather. Although the lower atmosphere was noted to be a bit dry, forecasters highlighted that the conditions were ripe for strong downdrafts or downbursts, which ultimately led to the widespread and destructive winds and a brief tornado.

The event began in southeastern Nebraska, with the first reports coming from Jefferson County just after midnight CST. At approximately 12:29 AM CST, law enforcement reported a power pole down 4 miles west of Endicott, with an estimated wind gust of 95 mph. Minutes later, at 12:48 AM CST, a significant gust of 90 mph caused damage to a large grain bin 2 miles west-southwest of Plymouth, according to a public report. Other reports in Jefferson County included a 62 mph gust measured by a mesonet station 6 miles west-northwest of Fairbury , and a 65 mph gust reported by a public mesonet station in Plymouth. The storm progressed into Lancaster and Johnson counties with reports of wind gusts of 66 mph and 60 mph from public mesonet stations near Hickman and Bennet, respectively. Law enforcement in Johnson County also reported extensive roof damage to two buildings north of Tecumseh around 1:40 AM CST. An emergency manager noted broken tree limbs 6 to 8 inches in diameter in the same area.

As the storm moved into Otoe and Nemaha counties, it continued to produce high-end wind damage. An emergency manager reported that a grain bin and a shed were destroyed near Julian, Nebraska, due to a 95 mph wind gust at 2:04 AM CST. A severe gust of 90 mph was measured by the AWOS station 5 miles south of Nebraska City at 2:10 AM CST before the sensor went offline. This gust also caused damage to sheds at the local airport.

The thunderstorms then pushed into western Iowa, where a significant line of damage reports was received in Fremont and Mills counties. Emergency management reported extensive tree damage in Riverton, Iowa, from a 90 mph gust at 2:20 AM CST. Farther north, a gust measured at 74 mph was reported from a public mesonet station 4 miles north-northeast of Tabor in Mills County at 2:28 AM CST. In Fremont County, emergency management reported several instances of high-end wind damage, including significant roof and wall damage to a large barn and a destroyed shed 3 miles south-southeast of Farragut, with estimated gusts of 95 mph. Extensive tree damage was also noted in Farragut itself from a 90 mph gust.

The event culminated in Page County, Iowa, with the most severe impact of the morning. At 2:32 AM CST, emergency management reported that a shed was overturned at a campsite 1 mile north-northwest of Shenandoah. This incident resulted in one fatality. The wind event also caused significant tree damage across the town, with numerous large trees snapped and other minor structural damage. Later in Shenandoah, at 2:37 AM CST, a semi-truck was overturned in a retail lot, with an estimated wind gust of 70 mph. The last report in the county was a 64 mph gust measured by a public mesonet station 4 miles east-northeast of Essex at 2:46 AM CST.

View location on OpenStreetMap → (40.6846, -95.5944)

Source: NOAA Storm Events Database, event_id 1290176. Narrative written by the NWS forecast office that issued the report.