FEMA flood zones · Nebraska

Antelope County, Nebraska Flood Zone Map

15 flood insurance claims·$406,249 paid·3 federal flood & hurricane disasters

Less than 1% of Antelope 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 Antelope County, Nebraska. 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 Antelope County floods

Flash flooding from summer thunderstorms and river floods dominate the flood history of Antelope County, Nebraska, with the NOAA Storm Events Database recording 16 flash floods and 11 general floods over the last 30 years. Notable recent events include a major flash flood driven by a mesoscale convective system on July 7, 2025, and historic widespread flooding on March 13, 2019, caused by a bomb cyclone that melted remaining snow cover over frozen ground while dropping 1 to 2.5 inches of rain.

Federal insurance records reflect these risks, with the vast majority of National Flood Insurance Program payouts concentrated in high-risk areas. Specifically, Zone A properties account for 14 claims with an average payout of $32,873 and an average recorded water depth of 2 inches. By contrast, Zone X unshaded areas recorded only 1 claim with an average payout of $11,776 and an average recorded water depth of 0 inches.

Homeowners, real estate agents, and journalists should pay the closest attention to properties located within Zone A, as these areas experience the highest frequency of claims and financial loss.

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 2 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 9 claims and $288,677 paid, the year of Severe Storms, Ice Jams, and Flooding and Severe Storms and Flooding.

2010: 9 claims2013: 1 claims2015: 1 claims2019: 4 claims1980199020002010

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

15 NOAA storm reports from Antelope County describe what happened, in the words of the forecasters who covered it. Read the Nebraska flood stories →

Federal disasters

13 federal disaster declarations since 1967, 3 of them floods, coastal storms or hurricanes.

DisasterBegan
Severe Storms And Straight-line WindsMay 12, 2022
Severe Winter Storm, Straight-line Winds, And FloodingMar 9, 2019
Severe Winter Storm And Straight-line WindsApr 13, 2018
Severe Storms And FloodingJun 1, 2010
Severe Storms, Ice Jams, And FloodingMar 6, 2010
Severe Winter Storms And SnowstormDec 22, 2009
Severe Winter StormsDec 19, 2006
Severe Winter StormNov 27, 2005

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

Recorded flood events

27 since 1996: 16 flash floods and 11 river or area floods.

EventDateDamage
Flash FloodJul 7, 2025—
Flash FloodMay 31, 2024$10,000
FloodJan 19, 2019—
FloodMar 13, 2019—
Flash FloodAug 15, 2017$30,000
FloodAug 28, 2015$50,000
Flash FloodAug 27, 2015$75,000
FloodMay 28, 2013—

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

From the storm reports

Flash Flood · Jul 7, 2025. On July 7, 2025, a lee surface trough pushed into western Nebraska and South Dakota during the afternoon, initiating scattered thunderstorms across the region. By evening, these storms consolidated into a larger mesoscale convective system (MCS) that tracked into northeast Nebraska before expanding southward across eastern Nebraska and southwest Iowa through the night.||Ahead of the main MCS, several discrete supe…

Flash Flood · May 31, 2024. Upper-level troughing was noted over the northern Rockies via upper-air analysis the morning of the 30th. This disturbance slowly tracked east across the northern Plains. Associated with this upper-level disturbance, a weakening cold front dove southeast across the northern Plains, stalling out across eastern Nebraska and northwest Iowa by the morning of the 31st. Along and ahead of this front, scattered showers a…

Flood · Jan 19, 2019. A winter storm brought some ice to the area. Initial forecasts also called for 2 to 5 inches of snow, but dry air in the mid levels resulted in freezing drizzle throughout the duration, and snowfall of one half inch or less. Ice accumulation ranged one or two tenths of an inch in some locations. A few power outages were noted and travel was at times difficult. A winter weather advisory was issued for all countie…

Flood · Mar 13, 2019. A 971mb bomb cyclone moved out of the central Rockies on Wednesday, March 13, 2019 and helped to create widespread, moderate to major, and in many cases historic, flooding across eastern Nebraska and western Iowa. From 4 to 15 inches of snow cover remained across the mid Missouri River valley, and the ground was frozen with existing frost depths of 15 to 23 inches. Warm temperatures allowed all of the snow to rapi…

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 Antelope County

If a building in Antelope 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.