FEMA flood zones · Indiana

St. Joseph County, Indiana Flood Zone Map

180 flood insurance claims·$1.3M paid·2 federal flood & hurricane disasters

8% of St. Joseph 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 St. Joseph County, Indiana. 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 St. Joseph County floods

Flash flooding and river flooding from heavy rainfall events dominate St. Joseph County's flood profile, backed by 12 flash flood events and 10 general flood events—including one fatality—recorded over the last 30 years in the NOAA Storm Events Database.

Recent history illustrates these local hazards. On March 31, 2023, evening thunderstorms brought heavy rain rates that caused flooding alongside hail, downed trees, and confirmed tornadoes. Later, on July 12, 2021, a slow-moving storm system dropped over four inches of rain within several hours across the South Bend and Mishawaka area, resulting in flash flooding and vehicle water rescues.

Federal insurance data shows historical claims spread across multiple zones, indicating risk extends beyond traditional high-risk areas. Properties in FEMA Zone A recorded 71 claims with an average water depth of 2 inches and an average payout of $10,322. Meanwhile, properties designated as Zone X experienced 39 claims with a higher average water depth of 8 inches and an average payout of $18,893, while unshaded Zone X properties logged 54 claims averaging 6 inches of recorded water depth. Homeowners in Zone A, Zone X, and unshaded Zone X areas should pay the most attention to flood risk given these historical claim distributions and recorded water depths.

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

Where the flood claims came from

46% of St. Joseph County’s flood insurance claims were on properties rated outside FEMA’s high-risk zones.

132 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 5 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 1982, with 37 claims and $132,925 paid.

1979: 1 claims1980: 1 claims1981: 9 claims1982: 37 claims1983: 1 claims1985: 15 claims1986: 1 claims1990: 2 claims1993: 5 claims1995: 3 claims1996: 14 claims1997: 1 claims1998: 1 claims2000: 2 claims2001: 2 claims2002: 1 claims2005: 1 claims2008: 23 claims2009: 3 claims2010: 1 claims2011: 1 claims2015: 1 claims2016: 23 claims2018: 28 claims2019: 1 claims2020: 1 claims2021: 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

12 NOAA storm reports from St. Joseph County describe what happened, in the words of the forecasters who covered it. Read the Indiana flood stories →

Federal disasters

16 federal disaster declarations since 1965, 2 of them floods, coastal storms or hurricanes.

DisasterBegan
Severe Winter StormJan 23, 2026
Severe Storms And FloodingFeb 14, 2018
Severe Storms, Tornadoes, And FloodingMar 8, 2009
Severe Storms And FloodingSep 12, 2008
Severe Storms And FloodingJan 7, 2008
SnowFeb 12, 2007
Hurricane Katrina EvacuationAug 29, 2005
Severe Winter Storms And FloodingJan 1, 2005

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

Recorded flood events

22 since 1996: 12 flash floods and 10 river or area floods.

EventDateDamage
Flash FloodMar 31, 2023$10,000
Flash FloodMar 31, 2023$5,000
FloodJun 26, 2021—
FloodJun 26, 2021$5,000
FloodAug 24, 2021—
Flash FloodJul 12, 2021—
FloodAug 6, 2021$1,000
FloodFeb 20, 2018$1.1M

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

From the storm reports

Flash Flood · Mar 31, 2023. Thunderstorms developing in the evening of March 31 resulted in multiple weather hazards. Hail nearly 2 inches in diameter was observed, trees were downed from thunderstorm wind, and flooding occurred from heavy rain rates. In the days that followed, storm damage surveys teams confirmed multiple tornadoes has moved through.

Flood · Jun 26, 2021. Several rounds of heavy rain in the days leading up to the severe weather on 26th. Some areas experienced flooding. Two lines of strong storms then swept through the northern and western portions of the CWA from 3p-9p. Several storms in the first line exhibited rotation. A few funnel clouds were reported but no confirmed tornadoes. The second line had mainly straight-line winds.

Flood · Aug 24, 2021. A broken line of storms progressed across south central Lake Michigan and into southwest Michigan and north-central Indiana. Severe winds were reported with some damage. There was also heavy rain with minor flooding.

Flash Flood · Jul 12, 2021. Scattered thunderstorms formed across northern Indiana during the afternoon and evening hours. Many exhibited weak rotation and some funnel clouds but did not produce severe weather. However, a slow steering flow and persistent outflow boundary across the South Bend/Mishawaka area caused areas of flooding and for a brief window flash flooding as over four inches of rain fell over several hours. Some rescues were n…

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 St. Joseph County

If a building in St. Joseph 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.