Enter any address in Allen County, Kansas to see its FEMA flood zone
Flash flooding from slow-moving thunderstorms is a primary flood concern in Allen County, KS. Over the last 30 years, NOAA data indicates 34 flood events and 24 flash flood events. Recent examples include widespread flooding in May 2019 due to heavy rainfall inundating saturated ground, and flash flooding in June 2022 from slow-moving thunderstorms producing 3 to 6 inches of rain.
National Flood Insurance Program (NFIP) claims data shows that properties in Zone A have experienced the most claims, with an average payout of $34,116 and an average water depth of 6.0 feet. Properties in Zone X_UNSHADED also saw significant claims with an average payout of $31,600 and an average water depth of 5.0 feet. Homeowners in Zone A, and those in Zone X_UNSHADED, should pay particular attention to flood risk.
Summary generated from NOAA storm narratives and NFIP claim data for this county. Not predictive.
22 NOAA storm reports from this county describe what happened, in the words of the meteorologists who were there.
Allen County, Kansas has recorded 58 flood-related events since 1996 according to NOAA's Storm Events Database, including 24 flash floods and 34 river or area floods. The county has received 14 federal disaster declarations, 1 of which involved flooding or coastal storms. Enter any address above to check its FEMA flood zone designation.
FEMA Disaster Declarations (1969–2024)
Source: OpenFEMA Disaster Declarations Summaries.
| Declaration | Type | Date |
|---|---|---|
| Severe Storms, Straight-line Winds, Tornadoes, And Flooding | Severe Storm | Apr 25, 2024 |
| Severe Storms, Straight-line Winds, Tornadoes, And Flooding | Severe Storm | Jul 14, 2023 |
| Covid-19 | Biological | Jan 20, 2020 |
| Covid-19 Pandemic | Biological | Jan 20, 2020 |
| Tornadoes And Flooding | Severe Storm | May 9, 2019 |
| Severe Storms, Straight-line Winds, Tornadoes, Flooding,landslides,and Mudslides | Severe Storm | Apr 28, 2019 |
| Severe Winter Storms And Snowstorm | Severe Storm | Dec 22, 2009 |
| Severe Winter Storms | Severe Storm | Dec 6, 2007 |
| Severe Storms And Flooding | Severe Storm | Jun 26, 2007 |
| Hurricane Katrina Evacuation | Hurricane | Sep 1, 2005 |
NOAA Storm Events Database (1996–2025)
Source: NOAA National Weather Service Storm Events Database.
| Type | Date | Damage |
|---|---|---|
| Flood | Aug 13, 2023 | 0.00K |
| Flood | Jun 1, 2022 | 0.10K |
| Flood | Mar 12, 2021 | 0.00K |
| Flood | May 28, 2020 | 0.00K |
| Flood | May 22, 2020 | 0.10K |
| Flood | Apr 30, 2019 | 0.00K |
| Flood | Sep 28, 2019 | 0.00K |
| Flood | Aug 11, 2019 | 0.00K |
| Flood | May 8, 2019 | 0.10K |
| Flash Flood | Aug 8, 2019 | 0.10K |
Flood — Aug 13, 2023
During the afternoon hours on August 13th, 2023, a weak cold front sagged southward across the area. Widely scattered strong to severe thunderstorms developed along the front as it slowly pushed southward during the late afternoon and evening hours. These storms produced wind damage as a result of wind gusts around 60 to 75 mph along with up to nickel sized hail. Minor flooding was also reporte...
Flood — Jun 1, 2022
Slow moving thunderstorms, that produced heavy rainfall began during the evening of May 31st. 2022, and persisted into the overnight hours across south central Kansas. The flash flooding continued into the early morning hours of June 1st. 2022. Heavy rainfall amounts ranged from 3 to 6 inches, caused flooding and flash flooding across southeast and south central Kansas.
Flood — Mar 12, 2021
Scattered severe storms moved across south central Kansas on the 12th producing copious amounts of rain and wind speeds between 60 and 65 mph.
Flood — May 28, 2020
Minor flooding was noted across portions of Allen county on the 28th.
Flood — May 22, 2020
Heavy rain and saturated grounds caused minor flooding on the 22nd.
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 Allen County, Kansas:
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 Allen County, Kansas 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.