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FEMA flood zones · Nebraska

Sheridan County, Nebraska Flood Zone Map

1 flood insurance claims·$1,192 paid·1 federal flood & hurricane disasters

Less than 1% of Sheridan 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 Sheridan 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.

In their words

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

Federal disasters

9 federal disaster declarations since 2005, 1 of them floods, coastal storms or hurricanes.

DisasterBegan
Severe Storms And Straight-line WindsJul 9, 2021
Severe Winter Storm, Straight-line Winds, And FloodingMar 9, 2019
Severe Storms, Tornadoes, And Straight-line WindsJun 12, 2017
Severe Storms, Winter Storms, Tornadoes And FloodingOct 2, 2013
Region 23 Fire ComplexAug 30, 2012
Severe Storms And FloodingJun 1, 2010
Hurricane Katrina EvacueesAug 29, 2005

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

Recorded flood events

10 since 1996: 9 flash floods and 1 river or area floods.

EventDateDamage
Flash FloodMay 11, 2023$10,000
Flash FloodJul 6, 2022—
FloodJul 6, 2022—
Flash FloodJul 17, 2018—
Flash FloodJul 11, 2011$1,000
Flash FloodJun 22, 2010—
Flash FloodAug 14, 2009—
Flash FloodJul 10, 2005$10,000

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

From the storm reports

Flash Flood · May 11, 2023. A slow moving, upper level low, situated over Colorado, led to the development of thunderstorms across the high plains of eastern Colorado, western Kansas and western Nebraska during the afternoon and evening hours of May 11th. Thunderstorms, some severe with strong wind gusts, and heavy rain was reported over a large portion of western and southwestern Nebraska. Thunderstorm wind gusts to 60 MPH in the Valentine…

Flash Flood · Jul 6, 2022. Thunderstorms produced torrential rainfall that led to flash flooding from the evening of July 6 into the morning of July 7 in parts of the panhandle as well as central Nebraska.

Flood · Jul 6, 2022. Thunderstorms produced torrential rainfall that led to flash flooding from the evening of July 6 into the morning of July 7 in parts of the panhandle as well as central Nebraska.

Flash Flood · Jul 17, 2018. Northwest flow aloft and a stationary front contributed to several days of severe storms.

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 Sheridan County

If a building in Sheridan 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.