Flood events in Union County, Illinois The flood events on record, by date and by year
This page is a county record of past events and claims. It does not show the flood zone or the risk of an address. For the flood map of an address, use FEMA's address search (opens in a new tab).
NCEI has 69 flood events on record for Union County, Illinois, from 1996 through 30 Jun 2026.
The newest flood event on record is on 13 Jul 2024.
From 2016 through 2025, NCEI has 16 flood events on record for the county.
The NWS collects event reports from a variety of sources, which include (but are not limited to): county, state, and federal emergency management officials, local law enforcement officials, SKYWARN spotters, NWS damage surveys, newspaper clipping services, the insurance industry, and the general public, among others.
The National Weather Service reports property and crop damage estimates using available data at the time of event reporting. These values should therefore be considered broad estimates. Damage amounts are not adjusted for inflation.
Zone (NWS Forecast Zone): A zone is a geographic area defined by the NWS for issuing forecasts, watches, and warnings. While zones often align with counties, they can also represent smaller or subdivided areas within a county to account for differences in weather conditions, such as elevation or proximity to water. Larger-scale events—such as heat, cold, drought, and winter storms—are typically recorded by zone.
The words of the agency. Source: NOAA NCEI, Storm Events Database, page "Frequently Asked Questions", copied on .
Date of the data: NCEI storm events through . Event types on this page: Flood, Flash Flood, Coastal Flood, Lakeshore Flood.
Newest flood events on record
Flash Flood
1 mile NE of MOUNTAIN GLEN
Flood
2 miles N of DONGOLA
Flash Flood
At COBDEN
Flash Flood
1 mile ENE of ANNA. Damage estimate: $100 thousand
Flash Flood
1 mile S of SARATOGA
Flood
At WOLF LAKE. Damage estimate: $520 thousand
Flash Flood
At COBDEN. Damage estimate: $30 thousand
Flood
At WARE. Damage estimate: $600 thousand
Flood
At WARE. Damage estimate: $30 thousand
Flood
1 mile N of ANNA
Flash Flood
At JONESBORO
Flood
At WOLF LAKE. Damage estimate: $50 thousand
Flood
At JONESBORO
Flash Flood
At WOLF LAKE. Damage estimate: $25 thousand
Flash Flood
2 miles NW of JONESBORO. Damage estimate: $15 thousand
Flood
At WOLF LAKE. Damage estimate: $700 thousand
Flood
At REYNOLDSVILLE
Flash Flood
At DONGOLA. Damage estimate: $5 thousand
Flood
At WARE. Damage estimate: $320 thousand
Flash Flood
1 mile S of JONESBORO
Flood
At WARE. Damage estimate: $30 thousand
Flood
At COBDEN
Flash Flood
1 mile NW of COBDEN. Damage estimate: $80 thousand
Flood
3 miles SW of WOLF LAKE. Damage estimate: $50 thousand
Flood
At ALDRIDGE. Damage estimate: $500 thousand
A place is the text of the NCEI record: a distance and a direction from a reference place. The site does not show a place text that names a private property or reads as a person. NCEI gives no magnitude for this hazard.
Flood events by year
| Decade | Year that ends in 0 | Year that ends in 1 | Year that ends in 2 | Year that ends in 3 | Year that ends in 4 | Year that ends in 5 | Year that ends in 6 | Year that ends in 7 | Year that ends in 8 | Year that ends in 9 | All |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1950s | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1960s | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1970s | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1980s | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1990s | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 2 | 4 | 5 | 14 |
| 2000s | 1 | 6 | 4 | 3 | 2 | 3 | 3 | 0 | 3 | 1 | 26 |
| 2010s | 0 | 6 | 0 | 0 | 2 | 5 | 4 | 1 | 0 | 6 | 24 |
| 2020s | 3 | 0 | 0 | 1 | 1 | 0 | 0 (part of the year) | 5 |
A darker cell has a larger count. The number is in each cell.
Flood and flash flood events are on record from 1996. The year 2026 has the events through 30 Jun 2026 only.
By month, all years
- Jan7 events
- Feb4 events
- Mar7 events
- Apr8 events
- May17 events
- Jun12 events
- Jul5 events
- Aug2 events
- Sep1 event
- Oct0 events
- Nov2 events
- Dec4 events
Beside the other counties
| Measure | Union | All counties of Illinois | All counties of the United States |
|---|---|---|---|
| Flood events, 1996 to 2026 | 69 | 6,491 | 177,902 |
| Events for each 100 square miles | 16.7 | 11.7 | 5.0 |
| Events for each 10,000 residents | 40.8 | 5.1 | 5.4 |
The columns for the state and the United States total the counties. They count the events of each county in the same way as the county column. A forecast zone with another name than a county counts for the state only.
More flood events on record
| Date | Event type | Magnitude | Damage estimate | Deaths | Injuries | On record for |
|---|---|---|---|---|---|---|
| Flood | not recorded | $70 thousand | 0 | 0 | County | |
| Flash Flood | not recorded | $250 thousand | 0 | 0 | County | |
| Flood | not recorded | $100 thousand | 0 | 0 | County | |
| Flood | not recorded | none | 0 | 0 | County | |
| Flood | not recorded | $30 thousand | 0 | 0 | County | |
| Flash Flood | not recorded | none | 0 | 0 | County | |
| Flood | not recorded | none | 0 | 0 | County | |
| Flood | not recorded | $1.3 million | 0 | 0 | County | |
| Flood | not recorded | none | 0 | 0 | County | |
| Flash Flood | not recorded | none | 0 | 0 | County | |
| Flash Flood | not recorded | $30 thousand | 0 | 0 | County | |
| Flash Flood | not recorded | none | 0 | 0 | County | |
| Flash Flood | not recorded | none | 0 | 0 | County | |
| Flood | not recorded | none | 0 | 0 | Forecast zone | |
| Flood | not recorded | none | 0 | 0 | Forecast zone | |
| Flood | not recorded | none | 0 | 0 | Forecast zone | |
| Flood | not recorded | none | 0 | 0 | Forecast zone | |
| Flash Flood | not recorded | none | 0 | 0 | County | |
| Flash Flood | not recorded | none | 0 | 0 | County | |
| Flash Flood | not recorded | none | 0 | 0 | County | |
| Flash Flood | not recorded | $8 thousand | 0 | 0 | County | |
| Flood | not recorded | $5 thousand | 0 | 0 | Forecast zone | |
| Flash Flood | not recorded | none | 1 | 0 | County | |
| Flood | not recorded | $8 thousand | 0 | 0 | Forecast zone | |
| Flash Flood | not recorded | none | 0 | 0 | County | |
| Flood | not recorded | none | 0 | 0 | Forecast zone | |
| Flood | not recorded | none | 0 | 0 | Forecast zone | |
| Flood | not recorded | none | 0 | 0 | Forecast zone | |
| Flood | not recorded | none | 0 | 0 | Forecast zone | |
| Flood | not recorded | none | 0 | 0 | County | |
| Flood | not recorded | none | 0 | 0 | Forecast zone | |
| Flood | not recorded | $4 thousand | 0 | 0 | Forecast zone | |
| Flood | not recorded | none | 0 | 0 | Forecast zone | |
| Flash Flood | not recorded | none | 0 | 0 | County | |
| Flash Flood | not recorded | $100 thousand | 0 | 0 | County | |
| Flash Flood | not recorded | none | 0 | 0 | County | |
| Flood | not recorded | none | 0 | 0 | Forecast zone | |
| Flood | not recorded | none | 0 | 0 | Forecast zone | |
| Flood | not recorded | none | 0 | 0 | Forecast zone | |
| Flood | not recorded | none | 0 | 0 | Forecast zone | |
| Flood | not recorded | none | 0 | 0 | Forecast zone | |
| Flood | not recorded | none | 0 | 0 | Forecast zone | |
| Flood | not recorded | none | 0 | 0 | Forecast zone | |
| Flood | not recorded | none | 0 | 0 | Forecast zone |
The table has all other events on record. A damage figure is an estimate in the NCEI record.
Official channels
- NCEI Storm Events Database (opens in a new tab)Search the full NCEI record by state, county and date.
- National Weather Service: Paducah, KY (opens in a new tab)The forecast office that issues the weather warnings for the county.
- FEMA Flood Map Service Center: Search By Address (opens in a new tab)Search an address to see its flood map. This site has no flood-zone data.
These links open the pages of the agencies. The site checked the links on .
Cite this page
County Hazards. "Flood events on record for Union County, Illinois". https://countyhazards.com/county/il/union/flood/. Data: NOAA NCEI Storm Events Database through 30 Jun 2026. Page made on .
Questions
- Which month has the most flood events on record for Union County?
- May has 17 of the 69 flood events on record from 1996 through 30 Jun 2026.
- How many flood events are on record for Illinois?
- NCEI has 6,507 flood events on record for Illinois from 1996 through 30 Jun 2026. That count has every forecast zone of the state.
- How does Union County compare with the other counties of Illinois?
- The counties of Illinois have 11.7 flood events for each 100 square miles. Union County has 16.7.
- Why are some flood events on record for a forecast zone?
- NCEI records some event types for a National Weather Service forecast zone and not for a county. This page counts a zone event when the zone has the name of the county.