Detailed information on the damaging winds and flooding that occurred during the early morning hours of August 9th and 10th, 2025. Read More >
Overview
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Two separate thunderstorm complexes produced swaths of 60-90 mph winds and heavy rainfall across portions of eastern Nebraska and southwest Iowa over a 24-hour period, from the early morning hours of August 9th to the early morning hours of August 10th. In addition to the damaging winds, the multiple waves of thunderstorms produced swaths of heavy rainfall of 3-4+ inches, with flash flooding reported in the Valley, Blair, and Lincoln areas of Nebraska, and the Pacific Junction area in southwest Iowa.
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| Radar loop of damaging-wind event #1. Storm reports are indicated in white. | Radar loop of damaging-wind event #2. Storm reports are indicated in white. |
Wind Event #1
The first damaging-wind episode occurred during the early morning of August 9th as a fast-moving cluster of thunderstorms raced through portions of southeast and east-central Nebraska into southwest and west-central Iowa. The hardest hit locations were from near Friend and Seward, through the north side of Lincoln and its vicinity, the west and north sides of the Omaha metro, and on to the Blair and Missouri Valley, IA areas. Measured wind gusts were consistently in the 70-85 mph range along that path. The strongest measured wind gust was 91 mph at the Lincoln airport, with some tree and structural damage suggestive of wind speeds approaching 100 mph.
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| Measured wind gusts (in mph). | Warnings issued in the NWS Omaha area of responsibility. The yellow polygons are Severe Thunderstorm Warnings, and the green polygons are Flash Flood Warnings. | Radar image just before a 77 mph wind gust was measured at the NWS in Valley, NE. The left panel is base reflectivity, and the right panel is base velocity. |
Wind Event #2
The second damaging-wind episode occurred during the early morning of August 10th as another complex of thunderstorms produced more sporadic wind damage from the Hebron and Fairbury vicinities, through Nebraska City, and into extreme southwest Iowa in the Shenandoah area. The strongest measured wind gust was 90 mph at the Nebraska City airport.
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| Measured wind gusts (in mph). | Warnings issued in the NWS Omaha area of responsibility. The yellow polygons are Severe Thunderstorm Warnings, the green polygons are Flash Flood Warnings, and the red polygon is a Tornado Warning. |
Heavy Rainfall and Flooding
In addition to the damaging winds, the multiple waves of thunderstorms produced swaths of heavy rainfall of 3-4+ inches, with flash flooding reported in the Valley, Blair, and Lincoln areas of Nebraska, and the Pacific Junction area in southwest Iowa.
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| 48-Hour Radar-Estimated (MRMS) Rainfall | 48-Hour CoCoRaHS Rainfall Reports |
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