Severe Weather History


Hazard archive · 1950 — present

Flood in Alexander County, Illinois

151

Recorded events

0

Direct deaths

0

Direct injuries

$14.5M

Property damage

Flood in Alexander County, Illinois: 151 recorded events between 2002 and 2025. The strongest on record measured 0. That places the county #24 nationally and #3 statewide for this hazard.

Decade by decade

Flood in Alexander County, Illinois: events per decade

Flood in Alexander County, Illinois: recorded events per decade
Flood in Alexander County, Illinois: recorded events per decade

Reporting practice changed over time — early decades are undercounted, not calmer.

The busiest decade for flood in Alexander County is the 2010s, when 92 of the county's 151 recorded events were logged. Comparing decades is useful for spotting active periods, but the earliest years are thin because systematic reporting for this hazard began later.

Within the Alexander County archive, flood makes up 44.9% of all recorded severe weather across 8 hazard types. Nationally the county sits at #24 for this hazard and #3 within Illinois, putting it in the 99.2 percentile of all U.S. counties.

Seasonality

Events by month

13Jan
14Feb
23Mar
27Apr
26May
17Jun
13Jul
3Aug
1Sep
3Oct
2Nov
9Dec

Apr is the peak month for flood in Alexander County with 27 recorded events, while Sep is the quietest. Seasonality here is a property of the archive as much as the climate: reports cluster where population and spotter networks are densest.

Most recent

Latest recorded events

DateLocationMagnitudeDamage
Mar 1, 2025CAIRO0$0
Feb 17, 2025CAIRO0$0
Jul 18, 2024THEBES0$0
Jul 6, 2024THEBES0$0
Jul 5, 2024EAST CAPE GIRARDEAU0$0
May 10, 2024CAIRO0$0
May 9, 2024THEBES0$0
May 4, 2024THEBES0$0
May 2, 2024EAST CAPE GIRARDEAU0$0
Apr 1, 2023CAIRO0$0
Source: NOAA/NCEI Storm Events · dates UTC · recent entries may be preliminary

Other hazards here

More from Alexander County

County overview →

From the record

What the reports say

Written by National Weather Service staff at the time of the event · public domain

Quick answers

Frequently asked

How many flood events are on record in Alexander County, Illinois?

151 flood events are recorded in Alexander County between 2002 and 2025, causing 0 direct deaths.

What is the strongest flood recorded in Alexander County?

The strongest flood on record in Alexander County measured 0.

Where does the flood data for Alexander County come from?

All events come from the NOAA/NCEI Storm Events Database, the federal public-domain archive of severe weather reports. Dates are UTC, damage is as reported and not inflation-adjusted, and the most recent entries may still be revised.

Cite this page

“Flood in Alexander County, Illinois.” Severe Weather History. severeweatherhistory.com/county/illinois/alexander-county/flood/ · Data: NOAA/NCEI, FEMA, U.S. Census — public domain.


Historical reference only — for official alerts visit weather.gov