Enter any address in Monona County, Iowa to see its FEMA flood zone
Flash flooding from thunderstorms is a significant flood hazard in Monona County, Iowa. Over the past 30 years, NOAA Storm Events data shows 12 flood events and 11 flash flood events recorded in the county. Recent examples include flash flooding on June 21, 2024, and river flooding on March 13, 2019, which caused widespread, historic flooding due to rapid snowmelt and heavy rainfall.
National Flood Insurance Program (NFIP) claims data indicates that properties in Zone A have experienced 13 claims with an average payout of $30,445 and an average water depth of -0.2 feet. Properties in Zone X have had 12 claims with an average payout of $23,362 and an average water depth of 22.2 feet. Homeowners in areas designated as Zone A, particularly those near rivers or in low-lying areas, should pay close attention to flood risk.
Summary generated from NOAA storm narratives and NFIP claim data for this county. Not predictive.
12 NOAA storm reports from this county describe what happened, in the words of the meteorologists who were there.
Monona County, Iowa has recorded 23 flood-related events since 1996 according to NOAA's Storm Events Database, including 11 flash floods and 12 river or area floods. The county has received 20 federal disaster declarations, 7 of which involved flooding or coastal storms. Enter any address above to check its FEMA flood zone designation.
FEMA Disaster Declarations (1965–2025)
Source: OpenFEMA Disaster Declarations Summaries.
| Declaration | Type | Date |
|---|---|---|
| Severe Winter Storm | Winter Storm | Mar 19, 2025 |
| Severe Storms, Flooding, Straight-line Winds, And Tornadoes | Severe Storm | Jun 16, 2024 |
| Covid-19 | Biological | Jan 20, 2020 |
| Covid-19 Pandemic | Biological | Jan 20, 2020 |
| Severe Storms And Flooding | Flood | Mar 12, 2019 |
| Severe Storms, Tornadoes, And Flooding | Severe Storm | May 19, 2013 |
| Flooding | Flood | May 25, 2011 |
| Severe Storms, Tornadoes, And Straight-line Winds | Severe Storm | Apr 9, 2011 |
| Severe Winter Storm | Severe Storm | Jan 19, 2010 |
| Severe Winter Storms And Snowstorm | Severe Storm | Dec 23, 2009 |
NOAA Storm Events Database (1996–2025)
Source: NOAA National Weather Service Storm Events Database.
| Type | Date | Damage |
|---|---|---|
| Flash Flood | Jun 25, 2024 | 100.00K |
| Flood | Jun 24, 2024 | 1.00M |
| Flood | Mar 13, 2019 | 4.20M |
| Flood | Mar 13, 2019 | 0.00K |
| Flash Flood | Jul 3, 2019 | 0.00K |
| Flash Flood | Sep 16, 2016 | 0.00K |
| Flash Flood | Jun 30, 2014 | 50.00K |
| Flash Flood | Jun 30, 2014 | 0.00K |
| Flood | May 28, 2013 | 0.00K |
| Flash Flood | Aug 11, 2013 | 0.00K |
Flash Flood — Jun 25, 2024
A series of shortwave troughs traversing the northern CONUS brought unsettled weather to the area for the end of June. On the 21st, a stationary front was draped across northeast Nebraska into Iowa. Ahead of one of the aforementioned shortwave troughs, several rounds of strong thunderstorms developed near this frontal zone and moved across northeast Nebraska. At 8 pm on the 21st, radar imagery ...
Flood — Jun 24, 2024
A series of shortwave troughs traversing the northern CONUS brought unsettled weather to the area for the end of June. On the 21st, a stationary front was draped across northeast Nebraska into Iowa. Ahead of one of the aforementioned shortwave troughs, several rounds of strong thunderstorms developed near this frontal zone and moved across northeast Nebraska. At 8 pm on the 21st, radar imagery ...
Flood — Mar 13, 2019
A 971mb bomb cyclone moved out of the central Rockies on Wednesday, March 13, 2019 and helped to create widespread, moderate to major, and in many cases historic, flooding across eastern Nebraska and western Iowa. From 4 to 15 inches of snow cover remained across the mid Missouri River valley, and the ground was frozen with existing frost depths of 15 to 23 inches. Warm temperatures allowed all...
Flash Flood — Jul 3, 2019
Strong thunderstorms early in the morning on July 3 produced very heavy rain. Strong thunderstorms developed during the afternoon and produced damaging winds.
Flash Flood — Sep 16, 2016
As an upper level storm system moved into the northern Plains, a warm front retreated through eastern Nebraska and western Iowa during the afternoon. Unseasonably warm and humid air lifted into the region creating marginal instability by mid afternoon, but with the warm front in the area environmental shear was strong. Thunderstorms developed across northeast and east-central Nebraska by mid af...
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 Monona County, Iowa:
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 Monona County, Iowa 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.