FEMA flood zones · Nebraska

Cedar County, Nebraska Flood Zone Map

4 flood insurance claims·$23,727 paid·5 federal flood & hurricane disasters

Less than 1% of Cedar 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 Cedar 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 Cedar County floods

Flash flooding and general flooding from thunderstorms and severe weather systems dominate the flood history of Cedar County, Nebraska. Over the last 30 years, the NOAA Storm Events Database has recorded 13 flash flood events and 10 general flood events in the area.

Recent events illustrate these hazards. In July 2024, isolated convection brought flash flooding to the county, with a trained spotter reporting water flowing over multiple county roads. Earlier, in March 2019, a bomb cyclone produced widespread, historic flooding across eastern Nebraska driven by rapid snowmelt over frozen ground combined with heavy rain.

Federal Emergency Management Agency records show that historical National Flood Insurance Program claims are concentrated in Zone A, which accounts for 4 claims with an average payout of $7,909 and an average recorded water depth of 8 inches. Properties located within Zone A should pay the closest attention to flood risks in the county.

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 8 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

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

Federal disasters

16 federal disaster declarations since 1967, 5 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 Storms, Tornadoes, Straight-line Winds, And FloodingJun 17, 2018
Severe Storms, Tornadoes, Straight-line Winds, And FloodingJun 14, 2014
FloodingJun 17, 2011
Severe Winter Storms And SnowstormDec 22, 2009
Severe Winter StormsDec 19, 2006
Hurricane Katrina EvacueesAug 29, 2005

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

Recorded flood events

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

EventDateDamage
Flash FloodJul 19, 2024—
Flash FloodApr 16, 2024—
FloodMar 13, 2019—
Flash FloodJul 18, 2018—
Flash FloodJun 17, 2014$200,000
FloodJul 5, 2014—
FloodSep 1, 2011$1,000
FloodJun 1, 2011$15,000

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

From the storm reports

Flash Flood · Jul 19, 2024. Isolated convection across northeast Nebraska brought an instance of flash flooding in Cedar County where a trained spotter reported water flowing over multiple county roads. There was also a funnel cloud the following day that received a lot of social media attention that developed over Norfolk. Additional funnels clouds were noted in Monona County the evening of the 21st.

Flash Flood · Apr 16, 2024. At midnight on the 16th, non-severe thunderstorms were ongoing across portions of northeast Nebraska and western Iowa. With these storms being rooted in a nearly stationary boundary co-located with the exit region of a low-level jet, this area saw prolonged periods of moderate to heavy rain. This resulted in isolated instances of flash flooding, especially for rural portions of western Wayne County where several r…

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…

Flash Flood · Jun 17, 2014. The warm front that was responsible for the significant tornadoes on the afternoon of the 16th, lifted slightly north on the 17th into far northeast Nebraska. Extreme instability again developed along this boundary given the very warm and humid airmass in place across the region. By late afternoon an isolated supercell thunderstorm developed along this boundary and quickly become severe. This lone supercell produc…

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 Cedar County

If a building in Cedar 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.