FloodZoneMap.org

Flood — Madison, IA

Apr 22, 1999

Another strong low pressure system moved across Kansas and Missouri on the 21st and 22nd. This system brought moderate to heavy rainfall to the Des Moines HSA. In the overnight hours of 21 April, heavy rains fell in the extreme upper end of the North Raccoon River basin. Radar estimates were inflated by a factor of two on the rainfall amounts, with actual rainfall close to 2 inches. A widespread area of one to one and one half inches fell over much of the rest of the Raccoon River basin. A

Source: NOAA National Weather Service Storm Events Database (event 5687221). Narrative written by NWS staff at the time of the event.

Flood Risk Context for Madison, IA

This event is one of many recorded floods in Madison County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.

View Madison County flood data →

More Flood Stories

Flash Flood$200K damage

Madison, IA · Jul 20, 2025

A moist and unstable environment on the southern side of an east-west oriented boundary brought thunderstorms to areas along and south of Interstate 80 in Iowa during the late evening of July 19th, 2025 and morning of July 20th, 2025.

Read the full account →
Flood$100K damage

Madison, IA · Mar 13, 2019

Reports from the 13h through the 19th in this entry. ||A relatively deep and widespread snowpack existed across the region during early to mid March.

Read the full account →
Flood$250K damage

Madison, IA · Jul 29, 2015

A boundary was pushing through the state with ongoing convection through central Iowa through the day. As the boundary neared the area, the convection intensified and impacted central and southern Iowa in the evening to early morning hours.

Read the full account →
Flash Flood$150K damage

Madison, IA · Jul 28, 2015

A boundary was pushing through the state with ongoing convection through central Iowa through the day. As the boundary neared the area, the convection intensified and impacted central and southern Iowa in the evening to early morning hours.

Read the full account →