FEMA flood zones · Kansas

Harper County, Kansas Flood Zone Map

1 flood insurance claims·$0 paid·1 federal flood & hurricane disasters

11% of Harper County’s area is in FEMA’s high-risk flood zones, and another 4% 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 Harper County, Kansas. 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 Harper County floods

Flash flooding from severe summer thunderstorms dominates the flood risk profile in Harper County. Over the last 30 years, the NOAA Storm Events Database records 23 flash flood events alongside 16 general flood events. Severe weather outbreaks have repeatedly threatened the region, such as prolonged severe thunderstorms in May 2019 that generated a combination of flash floods, large hail, damaging winds, and tornadoes. Additional powerful storms struck parts of Central and South-Central Kansas in June 2019, producing damaging winds reaching 80 miles per hour and widespread flash flooding.

Federal Emergency Management Agency records show minimal historical National Flood Insurance Program claims activity, limited to a single claim in the unshaded Zone X reporting an average payout of zero dollars and an average recorded water depth of zero inches. Homeowners, real estate agents, and journalists evaluating property risk in Harper County should pay the closest attention to locations susceptible to sudden flash flooding during severe thunderstorm events.

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

In their words

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

Federal disasters

21 federal disaster declarations since 1967, 1 of them floods, coastal storms or hurricanes.

DisasterBegan
Severe Storms, Straight-line Winds, Tornadoes, And FloodingJun 3, 2025
Severe Storms, Straight-line Winds, Tornadoes, Flooding,landslides,and MudslidesApr 28, 2019
Severe Storms, Tornadoes, Straight-line Winds, And FloodingMay 4, 2015
Severe Storms, Straight-line Winds, Tornadoes, And FloodingJul 22, 2013
SnowstormFeb 20, 2013
Severe Storms, Tornadoes, Straight-line Winds, And FloodingApr 14, 2012
Severe Storms, Flooding, Straight-line Winds, And TornadoesApr 25, 2009
Severe Storms, Flooding, And TornadoesSep 11, 2008

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

Recorded flood events

39 since 1996: 23 flash floods and 16 river or area floods.

EventDateDamage
Flash FloodMay 27, 2019—
FloodMay 25, 2019—
Flash FloodJun 22, 2019—
Flash FloodOct 3, 2019$100
FloodOct 8, 2018$100
FloodMay 11, 2017—
Flash FloodSep 9, 2016$100
FloodJul 23, 2015—

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

From the storm reports

Flash Flood · May 27, 2019. Severe thunderstorms broke out across Barton & Lincoln Counties in the evening. Then, as evening progressed, the severe thunderstorms spread across most of the remainder of Central Kansas, then across South-Central Kansas overnight, before finally weakening as they approached Greenwood County early in the morning on the 27th. The severe thunderstorms started as hail-producers, then as they surged across Central &…

Flood · May 25, 2019. A prolonged period of severe thunderstorms that produced a grand slam of flash floods, large hail, damaging winds & even a couple tornadoes hit nearly all of the Wichita (ICT) County Warning Area (CWA) throughout the afternoon & night on the 24th. Of the severe thunderstorm modes, floods & flash floods proved to be, by far, the greatest threat to these areas. The flash flooding continued across primarily Southeast…

Flash Flood · Jun 22, 2019. Extremely powerful Severe thunderstorms that produced a trifecta of large (in a few instances very large) hail, damaging winds that reached as high as 80 mph, and flash floods struck parts of Central as well as most of South-Central and Southeast Kansas in the afternoon and evening of the 22nd. Hardest hit were Reno and Sedgwick counties where hail reached the size of baseballs in Reno County and widespread winds…

Flash Flood · Oct 3, 2019. A complex of storms moved across portions of southern Kansas during the early morning hours of October 3rd, 2019. The storms produced reports of flash flash flooding across portions of Harper county, Kansas. Two to four inches of rainfall was reported across southern Kansas.

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 Harper County

If a building in Harper 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.