Flood — Seward, Nebraska

2025-09-01 to 2025-09-02 · near Milford, Seward, Nebraska

Event narrative

On the morning of September 1, 2025, intense thunderstorms generated heavy rainfall and subsequent flooding concerns across portions of eastern Nebraska, specifically Seward County. Radar estimated total rainfall for the event ranged from 3 to 6 inches. These assessments were strongly supported by public rainfall reports, which documented significant totals, including 5.51 inches four miles northwest of Dorchester, NE, 4.43 inches five miles north of Dorchester, NE, and 3.97 inches three miles west-northwest of Milford, NE. The resultant runoff from this excessive precipitation led to riverine flooding in Seward County along the Big Blue River near Crete, NE. The river officially entered flood stage at 8:30 PM CST on September 1, 2025, and reached its maximum height, or crest, of 21.30 feet'a level corresponding to minor flood stage'at 12:30 AM CST on September 2, 2025. The Big Blue River subsequently receded and fell below flood stage at 4:30 AM CST on September 2, 2025.

Wider weather episode

On the morning of September 1, 2025, a mesoscale vorticity maximum advancing into eastern Nebraska provided the necessary forcing for lift, resulting in a persistent band of moderate to heavy showers. The concurrent presence of a 20-25 knot low-level jet significantly enhanced the inflow of a very moist, albeit weakly unstable, air mass. This dynamic led to radar-estimated rainfall rates reaching 2 to 3 inches per hour in localized areas. Overall, radar indicated rainfall totals pushed 4 to 6 inches across portions of eastern Nebraska, specifically impacting Lancaster, Seward, Saunders, and Saline counties. These high totals were validated by public reports, including a maximum of 5.51 inches received four miles northwest of Dorchester, Nebraska. The heavy precipitation initiated flooding concerns, including flash flooding in Dorchester, where reports indicated water estimated at 2 to 4 inches deep over roadways in some locations. Runoff from the event led to continued hydrological concerns even after the rainfall subsided, with emergency management reporting water over numerous roads south and west of Milford, NE, at 6:35 AM CST. Additionally, river flooding was recorded, affecting the North Oak Creek at Valparaiso, which crested at a minor flood stage of 20.21 feet at 5:30 AM CST on September 1st, and the Big Blue River at Crete, NE, which crested at a minor flood stage of 21.30 feet at 12:30 AM CST on September 2nd.

A second area of concern was focused in Saunders County, particularly along the Wahoo Creek. The severity was highlighted at 12:45 PM CST on September 1, 2025, when a public photograph showed water levels nearly reaching the top I-beam of the School Street bridge over Wahoo Creek in Weston, NE. The impact continued into the evening, with an NWS employee reporting at 5:45 PM CST that water was over County Road J near County Road 15, located two miles south-southeast of Wahoo, Nebraska. The Wahoo Creek at Ithaca also experienced flooding, cresting at a minor flood stage of 19.55 feet at 6:15 AM CST on September 2nd, 2025.

View location on OpenStreetMap → (40.6556, -96.9877)

Source: NOAA Storm Events Database, event_id 1295441. Narrative written by the NWS forecast office that issued the report.