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Flood — Mercer, IL

Mar 16, 2019

Significant flooding occurred across eastern Iowa and northwest Illinois during the Spring of 2019. Moderate to major flooding was observed on the Mississippi River due to snowmelt, frozen ground, ice jams, saturated soils, and rainfall from mid March, and continued through the end of the month into April and May. An initial crest occurred during the third and fourth weeks of March.

Source: NOAA National Weather Service Storm Events Database (event 815657). Narrative written by NWS staff at the time of the event.

Flood Risk Context for Mercer, IL

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

View Mercer County flood data →

More Flood Stories

Flash Flood$10.0M damage

Mercer, IL · Apr 30, 2003

Supercell thunderstorms developed in the afternoon and evening north of a warm front that ran from Southern Iowa into Central Illinois. Three distinct supercells produced a majority of the wind, hail, and heavy rain reports from Jefferson County Iowa into Henry County Illinois.

Read the full account →
Flash Flood$5.0M damage

Mercer, IL · May 13, 2010

A warm front slowly lifted northward from central Missouri into eastern Iowa and northern Illinois May 12th and 13th. Several rounds of showers and thunderstorms moved across the area producing widespread torrential rains and some hail.

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Flood$1.0M damage

Mercer, IL · May 20, 2003

A pattern change at the end of April brought a series of heavy rain producing systems to Eastern Iowa and Northern Illinois over the first 10 days of the month. Area rivers responded with the Iowa River going above flood stage starting on the 10th.

Read the full account →
Flood$250K damage

Mercer, IL · Apr 18, 2011

Water from snow-melt in the upper Midwest moved south through the Mississippi River basin causing major flooding along the Mississippi River.||The snowfall was well above normal for the 2010-11 winter in much of Minnesota and Wisconsin.

Read the full account →