Enter any address in Brown County, Wisconsin to see its FEMA flood zone
Flash flooding from heavy rainfall events dominates the flood risk in Brown County. Between 2000 and 2020, NOAA data recorded 14 flood events and 12 flash flood events, alongside 8 lakeshore flood events. For example, heavy rain caused flash flooding on the west side of Green Bay on July 5, 2025, and approximately 2 inches of rain produced flash flooding in Green Bay on August 10, 2021.
FEMA National Flood Insurance Program data indicates that properties in Zone A have experienced the most claims, with 233 claims filed. However, properties in Zone X, though fewer in number (17 claims), have seen significantly deeper water, averaging 5.4 feet. Homeowners in Zone A, as well as those in Zone X, should pay particular attention to their flood risk.
Summary generated from NOAA storm narratives and NFIP claim data for this county. Not predictive.
19 NOAA storm reports from this county describe what happened, in the words of the meteorologists who were there.
Brown County, Wisconsin has recorded 34 flood-related events since 1996 according to NOAA's Storm Events Database, including 12 flash floods and 14 river or area floods. The county has received 8 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 (1973–2020)
Source: OpenFEMA Disaster Declarations Summaries.
| Declaration | Type | Date |
|---|---|---|
| Covid-19 | Biological | Jan 20, 2020 |
| Covid-19 Pandemic | Biological | Jan 20, 2020 |
| Hurricane Katrina Evacuation | Hurricane | Aug 29, 2005 |
| Severe Storms And Flooding | Severe Storm | May 7, 2004 |
| Severe Storms, Tornadoes & Flooding | Severe Storm | Jun 7, 1993 |
| Severe Storms, Tornadoes & Flooding | Severe Storm | Jun 22, 1990 |
| Drought | Drought | Jun 17, 1976 |
| Severe Storms & Flooding | Flood | Apr 27, 1973 |
NOAA Storm Events Database (1996–2025)
Source: NOAA National Weather Service Storm Events Database.
| Type | Date | Damage |
|---|---|---|
| Flash Flood | Jul 5, 2025 | 0.00K |
| Flash Flood | Jul 5, 2024 | 0.00K |
| Flash Flood | Aug 10, 2021 | 0.00K |
| Flood | Apr 29, 2020 | 0.00K |
| Flood | May 28, 2020 | 0.00K |
| Lakeshore Flood | Apr 28, 2020 | 450.00K |
| Flood | May 18, 2020 | 0.00K |
| Lakeshore Flood | May 17, 2020 | 0.00K |
| Lakeshore Flood | Nov 27, 2019 | 0.00K |
| Lakeshore Flood | Oct 21, 2019 | 0.00K |
Flash Flood — Jul 5, 2025
Several rounds of heavy rain fell ahead of an approaching cold front during the afternoon and evening on Saturday (7/05) with 2 to 3 inches of rain in a short time, causing flash flooding on the west side of Green Bay.
Flash Flood — Jul 5, 2024
An area of low pressure slowly tracked east across east-central Wisconsin to central Lake Michigan through the day on Friday (7/5). Showers and thunderstorms developed shortly after daybreak and then became more concentrated during the mid-morning into the early afternoon. A cluster of showers and thunderstorms became slow moving over Waupaca County, resulting in 4 to 6 inches of rain with the ...
Flash Flood — Aug 10, 2021
Thunderstorms developed ahead of an outflow boundary during the evening hours across east-central Wisconsin. The strongest storms produced damaging winds and a tornado. Rainfall amounts around 2 inches fell in Green Bay, producing flash flooding.
Flood — Apr 29, 2020
A strong low pressure system tracking through the southern Great Lakes caused gusty northeast winds across east-central and northeast Wisconsin, which caused some isolated damage and widespread lakeshore flooding in Brown and Oconto counties. The lakeshore flooding damaged several homes near the bay of Green Bay, with over $500,000 of damage in northern Brown and southern Oconto counties. The ...
Flood — May 28, 2020
A cold front brought several rounds of moderate to heavy rain across central and east-central Wisconsin during the 27th and 28th. 2 to 4 inches fell across the region during these two days, which caused street flooding and road closures across the area. Most of the flood reports were concentrated in the Green Bay metro area, especially along the Fox and East rivers.
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 Brown County, Wisconsin:
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 Brown County, Wisconsin 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.