Jul 11, 2025
The atmosphere on July 11, 2025, was primed for heavy rainfall, featuring a slow-moving frontal boundary that tapped into a corridor of abundant moisture to its south. This boundary, combined with strong instability, shear oriented along the boundary, and lift from an approaching upper-level disturbance, created an environment highly favorable for slow-moving, training thunderstorms capable of producing extremely high rainfall rates.||Torrential rainfall impacted much of the forecast area, but i
Source: NOAA National Weather Service Storm Events Database (event 1289161). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Black Hawk County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.