FEMA flood zones · Wisconsin

Wood County, Wisconsin Flood Zone Map

48 flood insurance claims·$726,927 paid·4 federal flood & hurricane disasters

24% of Wood County’s area is in FEMA’s high-risk flood zones.

Share of the whole county outline, rivers and lakes included; parts FEMA hasn’t mapped count as zero.

Coastal high risk (V, VE)FloodwayHigh risk (A, AE)Moderate (X, 500-year)Minimal (X)Undetermined (D)

Shaded areas are FEMA’s mapped flood hazard zones in and around Wood County, Wisconsin. Zoomed out they are simplified; at street level the map switches to FEMA’s exact layer. Tap anywhere to check that spot, or search an address above.

How Wood County floods

Heavy rainfall leading to flash flooding and river flooding represents the dominant flood character of Wood County, with NOAA records detailing 11 flash flood events and 12 general flood events over the last 30 years. Intense summer storms frequently produce high-volume rainfall over short periods. For example, a slow-moving low-pressure system on August 1, 2024, dropped 3 to 5 inches of rain, resulting in flash flooding and road closures. Similarly, heavy rainfall of 2 to 4 inches caused flash flooding across the county on July 15, 2022, and multiple rounds of thunderstorms dropped 3 to 5 inches of rain on August 27, 2021. Winter and spring warmups can also trigger rapid snowmelt and river ice jams, as occurred when unseasonally warm February temperatures in 2017 caused multiple rivers to exceed flood stage.

National Flood Insurance Program records reflect claims across different zones. Properties in high-risk Zone A recorded 37 claims with an average payout of $12,862 and an average recorded water depth of 3 inches. Properties in moderate-to-low risk Zone X recorded 10 claims with an average payout of $37,966 and an average recorded water depth of 2 inches. Homeowners, real estate agents, and journalists should pay the closest attention to properties located within Zone A river corridors, low-lying agricultural and wooded lands adjacent to waterways, and properties susceptible to rapid accumulation from intense summer downpours.

Summary written from NOAA storm reports and NFIP claims for this county. Not a prediction.

Where the flood claims came from

Less than 1% of Wood County’s flood insurance claims were on properties rated outside FEMA’s high-risk zones.

37 NFIP claims with a recorded rated flood zone, 1978 to date. The zone is the one FEMA used to rate that policy, which may not match today’s map. Source: OpenFEMA NFIP claims.

How deep the water got

outlet80″ door12″24″36″48″60″72″84″

In flood insurance claims here that reported a flood depth, the average was 3 inches.

Drawn to scale against an 80-inch door. Even a few inches soaks flooring, the bottom of the drywall and anything plugged in near the floor.

Average of the depths reported on claims (zero and implausible values left out); FEMA’s record doesn’t say exactly where each depth was measured. Source: OpenFEMA NFIP claims.

Flood claims, year by year

The worst year was 2010, with 17 claims and $286,074 paid, the year of Severe Storms and Flooding.

1980: 1 claims1983: 1 claims1986: 3 claims1989: 2 claims1993: 1 claims1998: 1 claims2001: 1 claims2002: 5 claims2004: 1 claims2010: 17 claims2011: 4 claims2016: 1 claims2017: 1 claims2019: 7 claims2021: 1 claims2024: 1 claims19801990200020102020

Bar height is scaled by square root so ordinary years stay visible next to the worst one. NFIP claims by year of loss. Source: OpenFEMA.

In their words

7 NOAA storm reports from Wood County describe what happened, in the words of the forecasters who covered it. Read the Wisconsin flood stories →

Federal disasters

13 federal disaster declarations since 1969, 4 of them floods, coastal storms or hurricanes.

DisasterBegan
Severe Storms, Tornadoes, Straight-line Winds, And FloodingJul 18, 2019
Severe Storms And FloodingSep 22, 2010
Hurricane Katrina EvacuationAug 29, 2005
Severe Storms And FloodingMay 7, 2004
Severe Storms, Tornadoes And FloodingSep 2, 2002
Severe Storms And FloodingJun 21, 2002
Flooding, Severe Storms And TornadoesApr 10, 2001
Severe Storms, Tornadoes & FloodingJun 7, 1993

Weather and water disasters only; most recent first. Source: OpenFEMA Disaster Declarations.

Recorded flood events

23 since 1996: 11 flash floods and 12 river or area floods.

EventDateDamage
Flash FloodAug 1, 2024—
Flash FloodJul 15, 2022—
Flash FloodAug 27, 2021$61,500
FloodFeb 21, 2017$50,000
FloodJun 12, 2017$1,000
Flash FloodSep 21, 2016$64,000
Flash FloodAug 18, 2014—
Flash FloodJul 19, 2011—

— = no damage estimate in the record. Source: NOAA Storm Events Database.

From the storm reports

Flash Flood · Aug 1, 2024. A slow moving low pressure system tracked across Wisconsin during the afternoon hours on Thursday (8/1). Showers and thunderstorms developed in a very moist airmass leading to small hail, gusty winds, and very heavy rain along across portions of central Wisconsin. As much as 3 to 5 inches of rain fell across this region during the afternoon, causing flash flooding and road closures across portions of Marathon, Woo…

Flash Flood · Jul 15, 2022. Showers and thunderstorm developed north of a warm front during the morning hours on Friday (7/15) across portions of central Wisconsin. A total of 2 to 4 inches of rain fell in a short period across Wood County, causing flash flooding.

Flash Flood · Aug 27, 2021. Thunderstorms developed north of a warm front then tracked east during the late afternoon hours and into the evening. There was an isolated report of wind damage and several rounds of thunderstorms produced flash flooding during the overnight hours across portions of central Wisconsin as 3 to 5 inches of rain fell.

Flood · Feb 21, 2017. Much warmer than normal temperatures from February 17th to the 22nd caused rapid snow melt and ice jams on rivers, especially across central Wisconsin. High temperatures there were in the 50s to lower 60s each day, while overnight lows remained near or above freezing. ||Seven rivers across central Wisconsin exceeded flood stage. The flooding was minor in most cases, impacting low, agricultural, and wooded land adj…

National Weather Service narratives, lightly trimmed. Source: NOAA Storm Events Database.

The zones you’ll see on the map

Every colour on the map above is a place on this drawing: where the ground sits relative to the flood FEMA plans for.

Cross-section of a river floodplainDiagram: a river valley. The floodway is the channel and the land beside it; the 1%-annual-chance flood surface (the base flood elevation) covers the valley floor as zone A or AE; a narrow band higher up is shaded X, the 0.2% floodplain; higher ground is X.0.2% CHANCE A YEAR (500-YEAR)BASE FLOOD ELEVATION · 1% A YEARXAEFloodwayAEX
  1. A / AE Inside the 1%-a-year floodplain: about a 26% chance of flooding over a 30-year mortgage. AE has a mapped base flood elevation; plain A does not.
  2. Floodway The channel and the land beside it that has to be kept clear enough to carry the flood. Building here is tightly limited.
  3. X shaded The 0.2% (500-year) floodplain, plus some levee-protected and very shallow flood areas.
  4. X Outside both lines. No federal requirement to insure, which is not the same as no risk.

Every flood zone code explained →

Flood insurance in Wood County

If a building in Wood County is in a high-risk zone (A or V) and its mortgage comes from a federally regulated or insured lender, or is federally backed, flood insurance is required.

Outside those zones it is optional, and often worth having: from 2014 to 2024 nearly one-third of NFIP claims came from outside the high-risk Special Flood Hazard Area. Since Risk Rating 2.0, NFIP premiums are set for each building, so the only reliable price is a quote: FloodSmart.gov or a local agent.