Enter any address in Logan County, Illinois to see its FEMA flood zone
Flash flooding from heavy rainfall events is the dominant flood character in Logan County. Recent examples include a flash flood event on February 22, 2023, associated with a warm front, and a flash flood on September 22, 2023, where rainfall exceeded 3 inches in southeastern Logan County, with a localized area receiving over 9 inches. Minor flooding in urban areas was also noted on August 11, 2023, following overnight thunderstorms.
While flash flooding is frequent, other flood types have occurred. Over the last 30 years, NOAA Storm Events data shows 43 flash flood events and 5 flood events, with one recorded fatality. NFIP claims data indicates that properties in Zone X, which has a higher average payout and water depth compared to other mapped zones, and Zone A, also show claim activity. Homeowners in these zones, as well as those in areas with unknown flood risk, should pay particular attention to potential flood hazards.
Summary generated from NOAA storm narratives and NFIP claim data for this county. Not predictive.
13 NOAA storm reports from this county describe what happened, in the words of the meteorologists who were there.
Logan County, Illinois has recorded 48 flood-related events since 1996 according to NOAA's Storm Events Database, including 43 flash floods and 5 river or area floods. The county has received 12 federal disaster declarations, 2 of which involved flooding or coastal storms. Enter any address above to check its FEMA flood zone designation.
FEMA Disaster Declarations (1968–2023)
Source: OpenFEMA Disaster Declarations Summaries.
| Declaration | Type | Date |
|---|---|---|
| Severe Storms And Flooding | Severe Storm | Jun 29, 2023 |
| Covid-19 | Biological | Jan 20, 2020 |
| Covid-19 Pandemic | Biological | Jan 20, 2020 |
| Severe Winter Storm And Snowstorm | Snowstorm | Jan 31, 2011 |
| Severe Winter Storm | Severe Ice Storm | Nov 30, 2006 |
| Tornadoes And Severe Storms | Severe Storm | Mar 11, 2006 |
| Hurricane Katrina Evacuation | Hurricane | Aug 29, 2005 |
| Severe Storms, Tornadoes And Flooding | Tornado | Apr 21, 2002 |
| Winter Storm 1/1/99 | Snowstorm | Jan 1, 1999 |
| Severe Storms & Flooding | Flood | Jun 10, 1974 |
NOAA Storm Events Database (1996–2025)
Source: NOAA National Weather Service Storm Events Database.
| Type | Date | Damage |
|---|---|---|
| Flash Flood | Sep 22, 2023 | 0.00K |
| Flash Flood | Feb 22, 2023 | 0.00K |
| Flood | Aug 11, 2023 | 0.00K |
| Flash Flood | Jun 26, 2021 | 300.00K |
| Flash Flood | Jun 25, 2021 | 0.00K |
| Flash Flood | Jul 11, 2021 | 0.00K |
| Flood | May 1, 2019 | 0.00K |
| Flash Flood | Aug 12, 2016 | 0.00K |
| Flash Flood | Jun 28, 2015 | 40.00K |
| Flash Flood | Jun 26, 2015 | 0.00K |
Flash Flood — Sep 22, 2023
A slow-moving upper-level disturbance interacting with a weak area of low pressure brought widespread rain and a few thunderstorms to central Illinois during the early morning of September 22nd. Due to the slow-moving nature of the showers, rainfall amounts exceeded 3 inches in a swatch from southeastern Logan and northwestern Macon counties northward across DeWitt and McLean counties. A loca...
Flash Flood — Feb 22, 2023
A warm front draped along the I-72 corridor served as the initial focusing mechanism for convection across central Illinois on February 22nd. Midday temperatures ranged from the upper 30s north of the boundary in the Peoria area to the lower 70s along and south of I-70. An upper-level disturbance interacting with the sharp temperature gradient triggered clusters of strong to severe thundersto...
Flood — Aug 11, 2023
Thunderstorms developed overnight across Iowa, ahead of a cold front, in an environment characterized by moderate instability and shear. The storms congealed into a line that swept across central Illinois during the early morning hours of August 11, producing scattered damaging winds before weakening after moving east of I-55. The thunderstorms produced locally heavy rainfall over 1 inch, which...
Flash Flood — Jun 26, 2021
A series of disturbances tracking along a nearly stationary frontal boundary resulted in two periods of heavy rainfall across parts of central Illinois on June 25th and June 26th. The hardest hit areas were across southern McLean County into far northern Logan County, as well as across southern portions of Scott and Morgan counties. The first wave of heavy rain began around 7pm CDT June 25th ...
Flash Flood — Jun 25, 2021
A series of disturbances tracking along a nearly stationary frontal boundary resulted in two periods of heavy rainfall across parts of central Illinois on June 25th and June 26th. The hardest hit areas were across southern McLean County into far northern Logan County, as well as across southern portions of Scott and Morgan counties. The first wave of heavy rain began around 7pm CDT June 25th ...
Source: NOAA National Weather Service Storm Events Database.
Source: OpenFEMA NFIP Individual Claims (2.25M records analyzed).
FEMA assigns flood zone designations to areas in Logan County, Illinois:
AE High Risk — 1% annual chance of flooding. Insurance required.
VE Very High Risk — Coastal flooding with wave action.
X (Shaded) Moderate Risk — 500-year floodplain.
X Low Risk — Outside major floodplains.
Properties in Logan County, Illinois that are in FEMA-designated Special Flood Hazard Areas (zones A and V) with federally backed mortgages are required to carry flood insurance.
Even outside high-risk zones, flood insurance is recommended. From 2014 to 2024, nearly one-third of NFIP claims came from outside the high-risk Special Flood Hazard Area.
Visit FloodSmart.gov to find an agent and get a quote.