FEMA flood zones · Minnesota

Swift County, Minnesota Flood Zone Map

12 flood insurance claims·$143,998 paid·8 federal flood & hurricane disasters

6% of Swift 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 Swift County, Minnesota. 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 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 1 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 1997, with 7 claims and $105,156 paid, the year of Severe Winter Storms and Severe Flooding, High Winds,severe Storms.

1997: 7 claims2001: 1 claims2002: 1 claims2011: 1 claims2019: 1 claims2022: 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

1 NOAA storm reports from Swift County describe what happened, in the words of the forecasters who covered it. Read the Minnesota flood stories →

Federal disasters

19 federal disaster declarations since 1965, 8 of them floods, coastal storms or hurricanes.

DisasterBegan
Severe Storms And FloodingApr 11, 2023
Severe Storms, Straight-line Winds, Tornadoes, And FloodingMay 29, 2022
Severe Winter Storm, Straight-line Winds, And FloodingMar 12, 2019
Severe Storms, Straight-line Winds, And FloodingJun 20, 2013
Severe Storms And FloodingMar 16, 2011
FloodingMar 1, 2010
Severe Storms And FloodingMar 16, 2009
Hurricane Katrina EvacuationAug 29, 2005

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

Recorded flood events

13 since 1996: 3 flash floods and 10 river or area floods.

EventDateDamage
FloodMar 17, 2010—
FloodMar 23, 2009—
Flash FloodJul 13, 2006—
Flash FloodAug 25, 2005—
Flash FloodApr 7, 2001$500,000
FloodMay 1, 2001—
FloodApr 1, 2001—
FloodAug 19, 1998—

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

From the storm reports

Flood · Mar 17, 2010. Accumulating snowfall across the Upper Midwest and Northern Plains was extensive during the 2009/2010 winter with snowfall water equivalent amounts across the Minnesota River Valley as high as six inches. Across the Mississippi River Valley and the Crow, snowfall water equivalent amounts were between three and five inches. ||The winter had very little melting on the snow cover and therefore, once temperatures in M…

Flood · Mar 23, 2009. A strong area of low pressure moved northward across the upper midwest and combined with unseasonable early Spring gulf moisture to cause a large area of heavy rainfall. Local rainfall totals were in the two to three inch range before the system moved north of the region. Along with the heavy rainfall, and due to thick ice remaining on areal streams, creeks and rivers, ice jams developed and caused flooding of are…

Flash Flood · Apr 7, 2001. The same intense low pressure system that brought high wind to southern Minnesota also dumped a large area of 3 to 4 inches rain across west central and central Minnesota, on top of melting snow and saturated ground. Drainage ditches, still clogged with snow, were unable to accept most of this rain water. About 3000 homes in Stearns County and 500 homes in Benton County sustained water damage to basements. Sever…

Flood · Apr 1, 2001. Heavy snowfall during winter remained on the ground through the end of March and then rapidly melted, resulting in river stages close to record levels. Water began to gush through drainage ditches, streams and into the mainstem rivers during midday April 1. Heavy rain April 7-8 over much of central Minnesota (see corresponding flood entry) prolonged the high water and also added one or two feet to many crests dur…

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 Swift County

If a building in Swift 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.