FEMA flood zones · Missouri

Shelby County, Missouri Flood Zone Map

2 flood insurance claims·$50,573 paid·3 federal flood & hurricane disasters

13% of Shelby County’s area is in FEMA’s high-risk flood zones, and another 1% in shaded X (mostly the 0.2% floodplain and areas behind levees).

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 Shelby County, Missouri. 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 Shelby County floods

Flash flooding from summer thunderstorms dominates the flood history of Shelby County. Over the last 30 years, the NOAA Storm Events Database records 24 flash flood events compared to 4 general flood events.

Recent occurrences illustrate these risks. In May 2019, storms developing along an outflow boundary produced multiple instances of flash flooding across the region. A slow-moving storm complex in August 2016 dropped rainfall amounts up to 6 inches with locally higher amounts, causing flash flooding over portions of north central and central Missouri.

National Flood Insurance Program records indicate historical claims are concentrated in Zone A, which recorded 2 averages of 1 inch of recorded water depth per claim with an average payout of $25,287. Properties located within Zone A and areas prone to sudden thunderstorm runoff should pay the closest attention to these risks.

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

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.

In their words

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

Federal disasters

26 federal disaster declarations since 1973, 3 of them floods, coastal storms or hurricanes.

DisasterBegan
Severe Storms, Straight-line Winds, Tornadoes, And FloodingJul 29, 2023
Severe Storms, Tornadoes, And FloodingApr 29, 2019
Severe Storms, Tornadoes, Straight-line Winds, And FloodingMay 15, 2015
Severe Storms, Tornadoes, Straight-line Winds, And FloodingSep 9, 2014
Severe Storms, Straight-line Winds, Tornadoes, And FloodingMay 29, 2013
Severe Winter StormJan 31, 2011
Severe Winter Storm And SnowstormJan 31, 2011
Severe Storms, Flooding, And TornadoesJun 12, 2010

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

Recorded flood events

28 since 1996: 24 flash floods and 4 river or area floods.

EventDateDamage
Flash FloodMay 28, 2019—
Flash FloodMay 26, 2019—
Flash FloodJun 14, 2017—
Flash FloodJul 6, 2016—
Flash FloodAug 2, 2016—
Flash FloodJun 7, 2015—
Flash FloodApr 17, 2013—
Flash FloodApr 24, 2010—

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

From the storm reports

Flash Flood · May 28, 2019. Storms developed along an old outflow boundary. Several of the storms produced severe weather including large hail and flash flooding.

Flash Flood · May 26, 2019. Storms developed along an old outflow boundary across portions of northeast Missouri and west central Illinois. There were numerous reports of damaging winds and several reports of flash flooding.

Flash Flood · Jun 14, 2017. Outflow boundary moved through region and was the trigger for multicell thunderstorm complex. There were numerous reports of damaging winds with these storms.

Flash Flood · Jul 6, 2016. Strong to severe storms developed across the region. Some of the storms produced large hail and damaging winds.

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 Shelby County

If a building in Shelby 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.